suyu_two/app/tests/logic_editor_service_tests.cpp

#include "domain/project_storage.h"
#include "domain/project_limits.h"
#include "services/logic_editor_service.h"
#include "services/editor_history.h"
#include "services/project_service.h"
#include "support/test_support.h"

#include <algorithm>
#include <iostream>
#include <stdexcept>

namespace {

using TestProjectStorage = TestSupport::InMemoryProjectStorage;
using TestSupport::require;

ContactNodeConfig contact(int address)
{
    return {RegisterAddress{RegisterArea::M, address}, ContactMode::NormallyOpen};
}

std::string makeEmptyRung(LogicEditorService &service, const std::string &logic_id)
{
    const LogicEditorResult result = service.addRung(logic_id);
    require(result.succeeded, "test fixture must create an empty network");
    return result.id;
}

int conditionColumns(const ConditionExpression &expression)
{
    if (expression.kind == ConditionExpressionKind::Node)
    {
        return 1;
    }
    if (expression.kind == ConditionExpressionKind::Wire)
    {
        return expression.wire->columnSpan;
    }
    if (expression.kind == ConditionExpressionKind::Gap)
    {
        return expression.gap->columnSpan;
    }
    int columns = expression.kind == ConditionExpressionKind::Series ? 0 : 1;
    for (const ConditionExpression &child : expression.children)
    {
        const int child_columns = conditionColumns(child);
        columns = expression.kind == ConditionExpressionKind::Series
            ? columns + child_columns : std::max(columns, child_columns);
    }
    return columns;
}

int wireColumns(const ConditionExpression &expression)
{
    if (expression.kind == ConditionExpressionKind::Node)
    {
        return 0;
    }
    if (expression.kind == ConditionExpressionKind::Wire)
    {
        return expression.wire->columnSpan;
    }
    if (expression.kind == ConditionExpressionKind::Gap)
    {
        return 0;
    }
    int columns = 0;
    for (const ConditionExpression &child : expression.children)
    {
        columns += wireColumns(child);
    }
    return columns;
}

int gapColumns(const ConditionExpression &expression)
{
    if (expression.kind == ConditionExpressionKind::Gap)
    {
        return expression.gap->columnSpan;
    }
    if (expression.kind == ConditionExpressionKind::Node
        || expression.kind == ConditionExpressionKind::Wire)
    {
        return 0;
    }
    int columns = 0;
    for (const ConditionExpression &child : expression.children)
    {
        columns += gapColumns(child);
    }
    return columns;
}

int conditionNodes(const ConditionExpression &expression)
{
    if (expression.kind == ConditionExpressionKind::Node)
    {
        return 1;
    }
    if (expression.kind == ConditionExpressionKind::Wire)
    {
        return 0;
    }
    if (expression.kind == ConditionExpressionKind::Gap)
    {
        return 0;
    }
    int count = 0;
    for (const ConditionExpression &child : expression.children)
    {
        count += conditionNodes(child);
    }
    return count;
}

const ConditionExpression *firstExpressionOfKind(
    const ConditionExpression &expression, ConditionExpressionKind kind)
{
    if (expression.kind == kind)
    {
        return &expression;
    }
    for (const ConditionExpression &child : expression.children)
    {
        if (const ConditionExpression *found = firstExpressionOfKind(child, kind))
        {
            return found;
        }
    }
    return nullptr;
}

void testEmptyLogicCreatesNetworksOnFirstEdit()
{
    TestProjectStorage storage;
    ProjectService project_service(storage);
    LogicEditorService service(project_service);
    const std::string logic_id = service.ensureDefaultLogic().id;
    require(service.findLogic(logic_id)->rungs.empty(),
            "a default control logic must start without an empty network");

    const LogicEditorResult first_condition = service.appendCondition(
        logic_id, {}, contact(0));
    require(first_condition.succeeded
                && service.findLogic(logic_id)->rungs.size() == 1U,
            "the first condition must create network 1 atomically");
    const LadderRung &condition_rung = service.findLogic(logic_id)->rungs.front();
    require(condition_rung.condition.has_value()
                && condition_rung.condition->kind == ConditionExpressionKind::Node,
            "the first condition must not create an implicit horizontal wire");

    require(service.removeRung(logic_id, condition_rung.id).succeeded
                && service.findLogic(logic_id)->rungs.empty(),
            "the last network must be removable back to an empty logic");

    const LogicEditorResult first_wire = service.appendWire(logic_id, {}, 1);
    require(first_wire.succeeded
                && service.findLogic(logic_id)->rungs.size() == 1U
                && service.findLogic(logic_id)->rungs.front().condition->kind
                    == ConditionExpressionKind::Wire,
            "the first horizontal wire must create a one-cell network");

    require(service.removeRung(
                logic_id, service.findLogic(logic_id)->rungs.front().id).succeeded,
            "the wire-only network must be removable");
    const LogicEditorResult first_output = service.setOutput(
        logic_id,
        {},
        CoilNodeConfig{RegisterAddress{RegisterArea::M, 10}, CoilMode::Normal});
    require(first_output.succeeded
                && service.findLogic(logic_id)->rungs.size() == 1U
                && service.findLogic(logic_id)->rungs.front().condition.has_value()
                && service.findLogic(logic_id)->rungs.front().condition->kind
                    == ConditionExpressionKind::Wire
                && service.findLogic(logic_id)->rungs.front().condition->wire->columnSpan
                    == ProjectLimits::kMaximumConditionColumns
                && service.findLogic(logic_id)->rungs.front().output.has_value(),
            "the first output must create a full-width explicit wire network");
}

void testAppendingWireMovesToNextNetworkAfterTenColumns()
{
    TestProjectStorage storage;
    ProjectService project_service(storage);
    LogicEditorService service(project_service);
    const std::string logic_id = service.ensureDefaultLogic().id;
    const std::string rung_id = makeEmptyRung(service, logic_id);
    for (int index = 0; index < ProjectLimits::kMaximumConditionColumns; ++index)
    {
        require(service.appendWire(logic_id, rung_id).succeeded,
                "ten horizontal wire cells must fit in one network");
    }
    const LogicEditorResult next = service.appendWire(logic_id, rung_id);
    require(next.succeeded && service.findLogic(logic_id)->rungs.size() == 2U,
            "the next appended wire must create the following network");
    const std::string next_rung_id = service.findLogic(logic_id)->rungs.back().id;
    require(service.findRung(logic_id, rung_id)->condition.has_value()
                && conditionColumns(*service.findRung(logic_id, rung_id)->condition)
                    == ProjectLimits::kMaximumConditionColumns
                && service.findRung(logic_id, next_rung_id)->condition.has_value(),
            "automatic network rollover must preserve both network contents");
    require(service.undo().succeeded && service.findLogic(logic_id)->rungs.size() == 1U,
            "automatic network rollover must be undone as one edit");
}

void testStructuredEditingAndNormalization()
{
    TestProjectStorage storage;
    ProjectService project_service(storage);
    LogicEditorService service(project_service);
    const std::string logic_id = service.ensureDefaultLogic().id;
    const std::string rung_id = makeEmptyRung(service, logic_id);

    const LogicEditorResult first = service.appendCondition(logic_id, rung_id, contact(0));
    const LogicEditorResult second = service.appendCondition(logic_id, rung_id, contact(1));
    require(first.succeeded && second.succeeded, "series append must succeed");

    const LadderRung *rung = service.findRung(logic_id, rung_id);
    require(rung->condition->kind == ConditionExpressionKind::Series
                && rung->condition->children.size() == 2U,
            "two appended nodes must form a series expression");

    const std::string second_expression_id = second.id;
    const LogicEditorResult parallel = service.addParallelBranch(
        logic_id, rung_id, {second_expression_id}, contact(2));
    require(parallel.succeeded, "parallel insertion must succeed");
    rung = service.findRung(logic_id, rung_id);
    const ConditionExpression *parallel_expression = service.findExpression(
        logic_id, rung_id, rung->condition->children.at(1).id);
    require(parallel_expression != nullptr
                && parallel_expression->kind == ConditionExpressionKind::Parallel,
            "selected node must become a parallel expression");

    const LogicEditorResult nested_series = service.insertConditionAfter(
        logic_id,
        rung_id,
        parallel.id,
        contact(3));
    require(nested_series.succeeded, "a parallel branch must accept a series node");
    rung = service.findRung(logic_id, rung_id);
    require(rung->condition->kind == ConditionExpressionKind::Series,
            "root must remain a series expression");
    const ConditionExpression &nested_parallel_expression = rung->condition->children.at(1);
    require(nested_parallel_expression.kind == ConditionExpressionKind::Parallel
                && nested_parallel_expression.children.at(1).kind
                    == ConditionExpressionKind::Series,
            "editor must express A AND (B OR (C AND D))");

    require(service.removeNode(logic_id, nested_series.id).succeeded,
            "nested series node deletion must succeed");
    rung = service.findRung(logic_id, rung_id);
    require(rung->condition->children.at(1).kind == ConditionExpressionKind::Parallel
                && rung->condition->children.at(1).children.at(1).kind
                    == ConditionExpressionKind::Series
                && gapColumns(*rung->condition) == 1
                && conditionColumns(*rung->condition) == 3,
            "deleting a nested node must preserve its column as an explicit gap");

    require(service.removeNode(logic_id, parallel.id).succeeded,
            "parallel leaf deletion must succeed");
    rung = service.findRung(logic_id, rung_id);
    require(rung->condition->kind == ConditionExpressionKind::Series
                && rung->condition->children.size() == 2U,
            "deleting a parallel leaf must preserve the surrounding topology");
    require(gapColumns(*rung->condition) == 2
                && conditionColumns(*rung->condition) == 3,
            "each deleted condition must remain as a one-column gap");

    require(service.setOutput(
                logic_id,
                rung_id,
                CoilNodeConfig{RegisterAddress{RegisterArea::M, 10}, CoilMode::Normal})
                .succeeded,
            "output coil must be set");
    require(service.findLogic(logic_id)->validate(),
            "structured editing result must remain a valid draft");
}

void testRangeParallelInsertion()
{
    TestProjectStorage storage;
    ProjectService project_service(storage);
    LogicEditorService service(project_service);
    const std::string logic_id = service.ensureDefaultLogic().id;
    const std::string rung_id = makeEmptyRung(service, logic_id);
    service.appendCondition(logic_id, rung_id, contact(0));
    service.appendCondition(logic_id, rung_id, contact(1));

    service.appendCondition(logic_id, rung_id, contact(2));
    const LogicEditorResult branch = service.addParallelBranch(
        logic_id, rung_id, {"contact-2", "contact-3"}, contact(3));
    require(branch.succeeded, "a continuous series range must accept a parallel branch");
    const ConditionExpression &root = *service.findRung(logic_id, rung_id)->condition;
    require(root.kind == ConditionExpressionKind::Series
                && root.children.size() == 2U
                && root.children.at(1).kind == ConditionExpressionKind::Parallel
                && root.children.at(1).children.front().kind
                    == ConditionExpressionKind::Series,
            "range insertion must express A AND ((B AND C) OR D)");
    require(root.validate(), "range insertion must preserve normalized topology");

    const LogicEditorResult invalid = service.addParallelBranch(
        logic_id, rung_id, {"contact-1", "contact-3"}, contact(4));
    require(!invalid.succeeded
                && invalid.error == LogicEditorError::InvalidOperation,
            "a non-contiguous selection must be rejected");
}

void testParallelBranchGridInsertion()
{
    TestProjectStorage storage;
    ProjectService project_service(storage);
    LogicEditorService service(project_service);
    const std::string logic_id = service.ensureDefaultLogic().id;
    const std::string rung_id = makeEmptyRung(service, logic_id);
    const LogicEditorResult first = service.appendCondition(
        logic_id, rung_id, contact(0));
    const LogicEditorResult second = service.appendCondition(
        logic_id, rung_id, contact(1));
    const LogicEditorResult third = service.appendCondition(
        logic_id, rung_id, contact(2));
    const LogicEditorResult branch = service.addParallelBranch(
        logic_id, rung_id, {first.id, second.id, third.id}, contact(10));
    require(branch.succeeded,
            "parallel grid insertion setup must create a short lower branch");

    service.clearHistory();
    const LadderRung *padded_rung = service.findRung(logic_id, rung_id);
    const ConditionExpression &padded_lower = padded_rung->condition->children.at(1);
    require(padded_lower.kind == ConditionExpressionKind::Series
                && padded_lower.children.size() == 2U
                && padded_lower.children.back().kind == ConditionExpressionKind::Wire
                && padded_lower.children.back().wire->columnSpan == 2,
            "a short parallel branch must persist its two padding cells as a wire");
    const LogicEditorResult inserted = service.replaceWireColumnWithCondition(
        logic_id,
        rung_id,
        padded_lower.children.back().id,
        1,
        contact(12));
    require(inserted.succeeded,
            "a persisted parallel branch wire cell must accept a condition");
    const LadderRung *rung = service.findRung(logic_id, rung_id);
    require(rung != nullptr && rung->condition.has_value()
                && rung->condition->kind == ConditionExpressionKind::Parallel,
            "branch grid insertion must preserve the surrounding parallel expression");
    const ConditionExpression &lower = rung->condition->children.at(1);
    require(lower.kind == ConditionExpressionKind::Series
                && lower.children.size() == 3U
                && lower.children.at(0).node->id == branch.id
                && lower.children.at(1).kind == ConditionExpressionKind::Wire
                && lower.children.at(1).wire->columnSpan == 1
                && lower.children.at(2).node->id == inserted.id,
            "a distant branch cell must persist only the required gap and new condition");

    require(service.undo().succeeded,
            "parallel branch grid insertion must be one undoable edit");
    rung = service.findRung(logic_id, rung_id);
    require(rung->condition->children.at(1).kind == ConditionExpressionKind::Series
                && rung->condition->children.at(1).children.front().node->id == branch.id
                && rung->condition->children.at(1).children.back().kind
                    == ConditionExpressionKind::Wire
                && rung->condition->children.at(1).children.back().wire->columnSpan == 2,
            "undo must restore the original branch and its explicit padding wire");

    service.clearHistory();
    const bool modified_before = project_service.isModified();
    const LogicEditorResult invalid = service.insertConditionInBranchAtColumn(
        logic_id, rung_id, branch.id, 3, contact(13));
    require(!invalid.succeeded && !service.canUndo()
                && project_service.isModified() == modified_before
                && service.findNode(logic_id, inserted.id) == nullptr,
            "a cell outside the visible branch padding must fail atomically");
}

void testStructuredWireEditing()
{
    TestProjectStorage storage;
    ProjectService project_service(storage);
    LogicEditorService service(project_service);
    const std::string logic_id = service.ensureDefaultLogic().id;
    const std::string rung_id = makeEmptyRung(service, logic_id);
    service.appendCondition(logic_id, rung_id, contact(0));
    service.appendCondition(logic_id, rung_id, contact(1));
    service.appendCondition(logic_id, rung_id, contact(2));

    const LogicEditorResult branch = service.addParallelWireBranch(
        logic_id, rung_id, {"contact-2", "contact-3"});
    require(branch.succeeded && branch.id == "wire-1",
            "a continuous range must accept a structured horizontal bypass");
    const LadderRung *rung = service.findRung(logic_id, rung_id);
    require(rung->condition->kind == ConditionExpressionKind::Series
                && rung->condition->children.at(1).kind
                    == ConditionExpressionKind::Parallel,
            "a vertical connection must produce a parallel expression");
    const ConditionExpression &wire =
        rung->condition->children.at(1).children.at(1);
    require(wire.kind == ConditionExpressionKind::Wire
                && wire.wire->columnSpan == 2,
            "the bypass wire span must match the selected two-column range");

    const LogicEditorResult replacement = service.replaceWireWithCondition(
        logic_id, rung_id, branch.id, contact(3));
    require(replacement.succeeded && replacement.id == "contact-4",
            "a selected wire must be replaceable by a configured node type");
    const LogicEditorResult extension = service.insertWireAfter(
        logic_id, rung_id, replacement.id);
    require(extension.succeeded && extension.id == "wire-2",
            "replacing one cell of a multi-cell wire must retain the original id on the remaining cell");

    rung = service.findRung(logic_id, rung_id);
    const ConditionExpression *extended_branch = service.findExpression(
        logic_id, rung_id, rung->condition->children.at(1).children.at(1).id);
    require(extended_branch != nullptr
                && extended_branch->kind == ConditionExpressionKind::Series
                && extended_branch->children.at(1).kind
                    == ConditionExpressionKind::Wire,
            "inserting a horizontal wire after a branch node must preserve structure");
    const std::string extended_branch_id = extended_branch->id;
    require(!service.addParallelWireBranch(
                 logic_id, rung_id, {"contact-1", "contact-3"}).succeeded,
            "non-contiguous wire connection targets must be rejected");

    require(service.removeExpressions(
                logic_id, rung_id, {extended_branch_id}).succeeded,
            "deleting a selected vertical connection branch must succeed atomically");
    rung = service.findRung(logic_id, rung_id);
    require(rung->condition.has_value()
                && conditionNodes(*rung->condition) == 3
                && conditionColumns(*rung->condition) == 4
                && wireColumns(*rung->condition) == 1
                && service.findNode(logic_id, replacement.id) == nullptr,
            "removing a bypass branch must keep the materialized padding wire without reconnecting positions");
    require(service.undo().succeeded
                && service.findExpression(logic_id, rung_id, extended_branch_id) != nullptr,
            "wire branch deletion must participate in ladder undo history");
}

void testWireCellParallelSelectionUsesExactColumns()
{
    TestProjectStorage storage;
    ProjectService project_service(storage);
    LogicEditorService service(project_service);
    const std::string logic_id = service.ensureDefaultLogic().id;
    const std::string rung_id = makeEmptyRung(service, logic_id);
    const LogicEditorResult source = service.appendWire(
        logic_id, rung_id, 3);
    require(source.succeeded, "wire-cell parallel setup must create a three-column wire");

    const LogicEditorResult branch = service.addParallelWireBranchAtCells(
        logic_id,
        rung_id,
        {{source.id, 0}, {source.id, 1}});
    require(branch.succeeded,
            "a selected two-cell wire range must create a parallel bypass");

    const LadderRung *rung = service.findRung(logic_id, rung_id);
    require(rung != nullptr && rung->condition.has_value()
                && rung->condition->kind == ConditionExpressionKind::Series
                && rung->condition->children.size() == 2U,
            "a partial wire selection must preserve the surrounding series layout");
    const ConditionExpression &parallel = rung->condition->children.front();
    require(parallel.kind == ConditionExpressionKind::Parallel
                && parallel.children.size() == 2U
                && parallel.children.front().kind == ConditionExpressionKind::Wire
                && parallel.children.front().wire->columnSpan == 2
                && parallel.children.back().kind == ConditionExpressionKind::Wire
                && parallel.children.back().wire->columnSpan == 2
                && rung->condition->children.back().kind
                    == ConditionExpressionKind::Wire
                && rung->condition->children.back().wire->columnSpan == 1
                && conditionColumns(*rung->condition) == 3,
            "the new bypass width must match the selected two cells, not the full source wire");

    service.clearHistory();
    const bool modified_before = project_service.isModified();
    const LogicEditorResult non_contiguous =
        service.addParallelWireBranchAtCells(
            logic_id,
            rung_id,
            {{source.id, 0}, {source.id, 2}});
    require(!non_contiguous.succeeded
                && project_service.isModified() == modified_before
                && !service.canUndo(),
            "non-contiguous wire-cell selections must fail without mutation");
}

void testWireCellParallelSelectionAcrossAdjacentWires()
{
    TestProjectStorage storage;
    ProjectService project_service(storage);
    LogicEditorService service(project_service);
    const std::string logic_id = service.ensureDefaultLogic().id;
    const std::string rung_id = makeEmptyRung(service, logic_id);
    std::vector<std::string> wire_ids;
    for (int index = 0; index < 3; ++index)
    {
        const LogicEditorResult wire = service.appendWire(logic_id, rung_id);
        require(wire.succeeded,
                "adjacent wire setup must create each one-column segment");
        wire_ids.push_back(wire.id);
    }

    const LogicEditorResult branch = service.addParallelWireBranchAtCells(
        logic_id,
        rung_id,
        {{wire_ids.at(0), 0}, {wire_ids.at(1), 0}, {wire_ids.at(2), 0}});
    require(branch.succeeded,
            "visually continuous adjacent wire cells must create one bypass");

    const LadderRung *rung = service.findRung(logic_id, rung_id);
    require(rung != nullptr && rung->condition.has_value()
                && rung->condition->kind == ConditionExpressionKind::Parallel
                && rung->condition->children.size() == 2U
                && rung->condition->children.front().kind
                    == ConditionExpressionKind::Wire
                && rung->condition->children.front().wire->columnSpan == 3
                && rung->condition->children.back().kind
                    == ConditionExpressionKind::Wire
                && rung->condition->children.back().wire->columnSpan == 3,
            "three adjacent one-column wires must become a three-column parallel range");
}

void testBatchDeleteAllNodesInParallelBranch()
{
    TestProjectStorage storage;
    ProjectService project_service(storage);
    LogicEditorService service(project_service);
    const std::string logic_id = service.ensureDefaultLogic().id;
    const std::string rung_id = makeEmptyRung(service, logic_id);

    const LogicEditorResult first = service.appendCondition(
        logic_id, rung_id, contact(0));
    const LogicEditorResult second = service.appendCondition(
        logic_id, rung_id, contact(1));
    const LogicEditorResult third = service.appendCondition(
        logic_id, rung_id, contact(2));
    const LogicEditorResult fourth = service.appendCondition(
        logic_id, rung_id, contact(3));
    require(first.succeeded && second.succeeded && third.succeeded
                && fourth.succeeded,
            "parallel batch deletion setup contacts must be created");

    const LogicEditorResult branch = service.addParallelBranch(
        logic_id, rung_id,
        {second.id, third.id, fourth.id},
        contact(10));
    require(branch.succeeded,
            "parallel batch deletion setup branch must be created");

    require(service.removeNodes(
                logic_id, {second.id, third.id, fourth.id})
                .succeeded,
            "deleting every node in a parallel branch as one batch must succeed");
    const LadderRung *rung = service.findRung(logic_id, rung_id);
    require(rung != nullptr && rung->condition.has_value()
                && rung->validate(),
            "batch deletion must leave a valid normalized ladder expression");
    require(rung->condition->kind == ConditionExpressionKind::Series
                && rung->condition->children.size() == 2U
                && rung->condition->children.at(0).kind
                    == ConditionExpressionKind::Node
                && rung->condition->children.at(1).kind
                    == ConditionExpressionKind::Parallel
                && conditionNodes(*rung->condition) == 2
                && gapColumns(*rung->condition) == 3
                && conditionColumns(*rung->condition) == 4,
            "deleted parallel conditions must remain as gaps without collapsing the branch");
    require(service.findNode(logic_id, second.id) == nullptr
                && service.findNode(logic_id, third.id) == nullptr
                && service.findNode(logic_id, fourth.id) == nullptr,
            "all selected parallel branch nodes must be removed");
    require(service.undo().succeeded,
            "parallel batch deletion must be undoable");
    require(service.findNode(logic_id, second.id) != nullptr
                && service.findNode(logic_id, third.id) != nullptr
                && service.findNode(logic_id, fourth.id) != nullptr,
            "undo must restore every deleted parallel branch node");
}

void testConditionColumnLimit()
{
    TestProjectStorage storage;
    ProjectService project_service(storage);
    LogicEditorService service(project_service);
    const std::string logic_id = service.ensureDefaultLogic().id;
    const std::string rung_id = makeEmptyRung(service, logic_id);

    for (int column = 0; column < ProjectLimits::kMaximumConditionColumns; ++column)
    {
        require(service.appendCondition(logic_id, rung_id, contact(column)).succeeded,
                "the first ten condition columns must be editable");
    }
    require(project_service.saveAs("logic-editor-condition-limit.json").succeeded,
            "the ten-column network must be saveable before testing overflow");
    require(!project_service.isModified(),
            "saving the ten-column network must clear the modified state");
    const LogicEditorResult overflow = service.appendCondition(
        logic_id, rung_id, contact(ProjectLimits::kMaximumConditionColumns));
    require(!overflow.succeeded
                && overflow.error == LogicEditorError::InvalidOperation,
            "the eleventh condition column must be rejected by the editor service");
    require(!project_service.isModified(),
            "a failed eleventh-column edit must preserve the saved state");
    const LadderRung *rung = service.findRung(logic_id, rung_id);
    require(rung != nullptr && rung->condition.has_value()
                && rung->condition->kind == ConditionExpressionKind::Series
                && rung->condition->children.size()
                    == static_cast<std::size_t>(
                        ProjectLimits::kMaximumConditionColumns),
            "a rejected eleventh column must leave the ten-column network unchanged");

    require(service.setOutput(
                logic_id,
                rung_id,
                CoilNodeConfig{
                    RegisterAddress{RegisterArea::M, 20}, CoilMode::Normal},
                true)
                .succeeded
                && project_service.isModified(),
            "a successful edit must make the project modified again");
    require(!service.appendCondition(
                logic_id, rung_id,
                contact(ProjectLimits::kMaximumConditionColumns))
                .succeeded
                && project_service.isModified(),
            "a failed edit must preserve an existing modified state");
}

void testUnconditionalOutputEditing()
{
    TestProjectStorage storage;
    ProjectService project_service(storage);
    LogicEditorService service(project_service);
    const std::string logic_id = service.ensureDefaultLogic().id;
    const std::string rung_id = makeEmptyRung(service, logic_id);

    require(service.setOutput(
                logic_id,
                rung_id,
                CoilNodeConfig{
                    RegisterAddress{RegisterArea::M, 10}, CoilMode::Normal},
                true)
                .succeeded,
            "the editor must allow a coil before any condition is added");
    const LadderRung *rung = service.findRung(logic_id, rung_id);
    require(rung != nullptr && rung->condition.has_value()
                && rung->condition->kind == ConditionExpressionKind::Wire
                && rung->condition->wire->columnSpan
                    == ProjectLimits::kMaximumConditionColumns
                && rung->output.has_value() && rung->validateForRunning(),
            "an editor-created unconditional network must use a full-width wire");

    const std::string contact_rung_id = makeEmptyRung(service, logic_id);
    const LogicEditorResult contact_result = service.appendCondition(
        logic_id, contact_rung_id, contact(0));
    require(contact_result.succeeded
                && service.updateNodeConfig(
                    logic_id, contact_result.id, contact(0)).succeeded
                && service.setOutput(
                    logic_id,
                    contact_rung_id,
                    CoilNodeConfig{
                        RegisterAddress{RegisterArea::M, 11}, CoilMode::Normal},
                    true).succeeded,
            "a contact followed by an output must be editable");
    const LadderRung *contact_rung = service.findRung(logic_id, contact_rung_id);
    require(contact_rung != nullptr && contact_rung->condition.has_value()
                && conditionNodes(*contact_rung->condition) == 1
                && wireColumns(*contact_rung->condition) == 9
                && conditionColumns(*contact_rung->condition) == 10
                && contact_rung->validateForRunning(),
            "a contact followed by an output must persist the remaining nine wire cells");
}

void testExplicitGapEditing()
{
    TestProjectStorage storage;
    ProjectService project_service(storage);
    LogicEditorService service(project_service);
    const std::string logic_id = service.ensureDefaultLogic().id;
    const std::string rung_id = makeEmptyRung(service, logic_id);
    require(service.setOutput(
                logic_id,
                rung_id,
                CoilNodeConfig{
                    RegisterAddress{RegisterArea::M, 30}, CoilMode::Normal},
                true).succeeded,
            "gap editing setup must create an explicit full-width wire");

    const LadderRung *rung = service.findRung(logic_id, rung_id);
    const std::string full_wire_id = rung->condition->id;
    require(service.disconnectWireCells(
                logic_id, rung_id, {{full_wire_id, 4}}).succeeded,
            "deleting one wire cell must create a gap");
    rung = service.findRung(logic_id, rung_id);
    require(rung->validate() && !rung->validateForRunning()
                && conditionColumns(*rung->condition) == 10
                && wireColumns(*rung->condition) == 9
                && gapColumns(*rung->condition) == 1,
            "a disconnected wire cell must preserve width and block runtime");

    const ConditionExpression *gap = firstExpressionOfKind(
        *rung->condition, ConditionExpressionKind::Gap);
    require(gap != nullptr, "the disconnected cell must expose a gap expression");
    const std::string first_gap_id = gap->id;
    require(service.replaceGapColumnWithWire(
                logic_id, rung_id, first_gap_id, 0).succeeded,
            "a gap cell must be repairable with a real wire");
    rung = service.findRung(logic_id, rung_id);
    require(gapColumns(*rung->condition) == 0
                && wireColumns(*rung->condition) == 10
                && rung->validateForRunning(),
            "repairing the gap with a wire must restore a runnable path");

    const ConditionExpression *wire = firstExpressionOfKind(
        *rung->condition, ConditionExpressionKind::Wire);
    require(wire != nullptr, "the repaired path must expose a wire expression");
    const std::string repaired_wire_id = wire->id;
    require(service.disconnectWireCells(
                logic_id, rung_id, {{repaired_wire_id, 0}}).succeeded,
            "a repaired wire cell must be disconnectable again");
    rung = service.findRung(logic_id, rung_id);
    gap = firstExpressionOfKind(*rung->condition, ConditionExpressionKind::Gap);
    require(gap != nullptr, "the second disconnection must expose a gap expression");
    const std::string second_gap_id = gap->id;
    const LogicEditorResult inserted_result = service.replaceGapColumnWithCondition(
        logic_id, rung_id, second_gap_id, 0, contact(31));
    require(inserted_result.succeeded
                && service.updateNodeConfig(
                    logic_id, inserted_result.id, contact(31)).succeeded,
            "a gap cell must be replaceable with a contact");
    rung = service.findRung(logic_id, rung_id);
    const ConditionExpression *inserted = firstExpressionOfKind(
        *rung->condition, ConditionExpressionKind::Node);
    require(inserted != nullptr && gapColumns(*rung->condition) == 0
                && conditionNodes(*rung->condition) == 1
                && conditionColumns(*rung->condition) == 10
                && rung->validateForRunning(),
            "a contact inserted into a gap must preserve the ten-column path");
    const std::string inserted_node_id = inserted->node->id;
    require(service.removeNode(logic_id, inserted_node_id).succeeded,
            "the inserted contact must be removable");
    rung = service.findRung(logic_id, rung_id);
    require(conditionNodes(*rung->condition) == 0
                && gapColumns(*rung->condition) == 1
                && conditionColumns(*rung->condition) == 10
                && !rung->validateForRunning(),
            "deleting a contact must restore a gap instead of reconnecting the path");

    const std::string multi_rung_id = makeEmptyRung(service, logic_id);
    require(service.setOutput(
                logic_id,
                multi_rung_id,
                CoilNodeConfig{
                    RegisterAddress{RegisterArea::M, 32}, CoilMode::Normal},
                true).succeeded,
            "multi-gap setup must create a full-width wire");
    const std::string multi_wire_id = service.findRung(
        logic_id, multi_rung_id)->condition->id;
    require(service.disconnectWireCells(
                logic_id,
                multi_rung_id,
                {{multi_wire_id, 2}, {multi_wire_id, 7}}).succeeded,
            "multiple cells in one wire must disconnect atomically");
    const LadderRung *multi_rung = service.findRung(logic_id, multi_rung_id);
    require(conditionColumns(*multi_rung->condition) == 10
                && wireColumns(*multi_rung->condition) == 8
                && gapColumns(*multi_rung->condition) == 2
                && !multi_rung->validateForRunning(),
            "multiple disconnected cells must retain both explicit gaps");
}

void testColumnTargetedConditionInsertion()
{
    TestProjectStorage storage;
    ProjectService project_service(storage);
    LogicEditorService service(project_service);
    const std::string logic_id = service.ensureDefaultLogic().id;
    const std::string first_rung_id = makeEmptyRung(service, logic_id);

    require(service.insertConditionAtColumn(
                logic_id, first_rung_id, 4, contact(4)).succeeded,
            "an empty network must accept a condition at the selected fifth column");
    const LadderRung *rung = service.findRung(logic_id, first_rung_id);
    require(rung != nullptr && rung->condition.has_value()
                && rung->condition->kind == ConditionExpressionKind::Series
                && rung->condition->children.size() == 2U
                && rung->condition->children.front().kind
                    == ConditionExpressionKind::Wire
                && rung->condition->children.front().wire->columnSpan == 4
                && rung->condition->children.back().kind
                    == ConditionExpressionKind::Node
                && rung->validate()
                && conditionColumns(*rung->condition) == 5,
            "column insertion must preserve the requested horizontal position");

    require(service.insertConditionAtColumn(
                logic_id, first_rung_id, 2, contact(2)).error
                == LogicEditorError::InvalidOperation,
            "inserting into an already occupied column must be rejected atomically");
    require(service.insertConditionAtColumn(
                logic_id, first_rung_id, 10, contact(10)).error
                == LogicEditorError::InvalidOperation,
            "the eleventh condition column must be rejected");
    require(service.insertConditionAtColumn(
                logic_id, first_rung_id, -1, contact(10)).error
                == LogicEditorError::InvalidOperation,
            "a negative grid column must be rejected");
    require(service.insertConditionAtColumn(
                logic_id,
                first_rung_id,
                5,
                CoilNodeConfig{
                    RegisterAddress{RegisterArea::M, 10}, CoilMode::Normal})
                .error == LogicEditorError::InvalidNode,
            "a condition grid slot must reject output instructions");

    const LogicEditorResult second_rung = service.addRung(logic_id);
    require(second_rung.succeeded,
            "column insertion test must create a second empty network");
    require(service.setOutput(
                logic_id,
                second_rung.id,
                CoilNodeConfig{RegisterAddress{RegisterArea::M, 20}, CoilMode::Normal},
                true)
                .succeeded,
            "an output-only network must be configurable before adding a condition");
    const std::string output_wire_id = service.findRung(
        logic_id, second_rung.id)->condition->id;
    require(service.replaceWireColumnWithCondition(
                logic_id, second_rung.id, output_wire_id, 0, contact(0)).succeeded,
            "the first wire cell must accept a contact on an unconditional network");
    const LadderRung *output_rung = service.findRung(logic_id, second_rung.id);
    require(output_rung != nullptr && output_rung->condition.has_value()
                && output_rung->condition->kind == ConditionExpressionKind::Series
                && conditionNodes(*output_rung->condition) == 1
                && wireColumns(*output_rung->condition) == 9
                && conditionColumns(*output_rung->condition) == 10
                && output_rung->output.has_value()
                && output_rung->validate(),
            "condition insertion must keep the independent output slot intact");

    const LogicEditorResult last_column_rung = service.addRung(logic_id);
    require(last_column_rung.succeeded
                && service.insertConditionAtColumn(
                    logic_id, last_column_rung.id, 9, contact(9)).succeeded,
            "the tenth condition column must remain a valid insertion target");
    const LadderRung *full_width = service.findRung(
        logic_id, last_column_rung.id);
    require(full_width != nullptr && full_width->condition.has_value()
                && full_width->condition->kind == ConditionExpressionKind::Series
                && full_width->condition->children.front().wire->columnSpan == 9
                && conditionColumns(*full_width->condition) == 10,
            "last-column insertion must fill exactly the ten-column condition area");
    require(!service.appendCondition(
                 logic_id, last_column_rung.id, contact(10)).succeeded
                && conditionColumns(*service.findRung(
                    logic_id, last_column_rung.id)->condition) == 10,
            "a full-width grid must reject another condition without partial changes");
}

void testWireColumnReplacement()
{
    TestProjectStorage storage;
    ProjectService project_service(storage);
    LogicEditorService service(project_service);
    const std::string logic_id = service.ensureDefaultLogic().id;
    const std::string rung_id = makeEmptyRung(service, logic_id);
    const LogicEditorResult wire = service.appendWire(logic_id, rung_id, 4);
    require(wire.succeeded,
            "wire-column replacement test must create a four-column wire");

    require(service.replaceWireColumnWithCondition(
                logic_id, rung_id, wire.id, 1,
                ContactNodeConfig{
                    RegisterAddress{RegisterArea::M, 1},
                    ContactMode::NormallyClosed})
                .succeeded,
            "a selected wire cell must be replaceable without removing adjacent cells");
    const LadderRung *rung = service.findRung(logic_id, rung_id);
    require(rung != nullptr && rung->condition.has_value()
                && rung->condition->kind == ConditionExpressionKind::Series
                && rung->condition->children.size() == 3U
                && rung->condition->children.front().wire->columnSpan == 1
                && rung->condition->children.at(1).kind
                    == ConditionExpressionKind::Node
                && std::get<ContactNodeConfig>(
                    rung->condition->children.at(1).node->config).mode
                    == ContactMode::NormallyClosed
                && rung->condition->children.back().wire->columnSpan == 2
                && conditionColumns(*rung->condition) == 4,
            "wire-cell replacement must split the wire around the new contact");

    const std::vector<ControlLogic> before_invalid =
        project_service.project().controlLogics;
    require(service.replaceWireColumnWithCondition(
                logic_id,
                rung_id,
                rung->condition->children.front().id,
                1,
                contact(2))
                .error == LogicEditorError::InvalidOperation,
            "an out-of-range wire-cell offset must be rejected");
    require(project_service.project().controlLogics.size() == before_invalid.size()
                && conditionColumns(*service.findRung(
                    logic_id, rung_id)->condition) == 4,
            "a rejected wire-cell replacement must leave the network width unchanged");

    const LogicEditorResult first_cell_rung = service.addRung(logic_id);
    const LogicEditorResult first_cell_wire = service.appendWire(
        logic_id, first_cell_rung.id, 4);
    require(first_cell_rung.succeeded && first_cell_wire.succeeded
                && service.replaceWireColumnWithCondition(
                    logic_id,
                    first_cell_rung.id,
                    first_cell_wire.id,
                    0,
                    contact(10))
                    .succeeded,
            "the first cell of a multi-column wire must be replaceable");
    const LadderRung *first_cell = service.findRung(logic_id, first_cell_rung.id);
    require(first_cell != nullptr && first_cell->condition.has_value()
                && first_cell->condition->kind == ConditionExpressionKind::Series
                && first_cell->condition->children.size() == 2U
                && first_cell->condition->children.front().kind
                    == ConditionExpressionKind::Node
                && first_cell->condition->children.back().kind
                    == ConditionExpressionKind::Wire
                && first_cell->condition->children.back().wire->columnSpan == 3,
            "first-cell replacement must preserve the trailing wire cells");
    require(service.undo().succeeded,
            "wire-cell replacement must be one undoable edit");
    const LadderRung *undone = service.findRung(logic_id, first_cell_rung.id);
    require(undone != nullptr && undone->condition.has_value()
                && undone->condition->kind == ConditionExpressionKind::Wire
                && undone->condition->wire->columnSpan == 4,
            "undo must restore the original unsplit wire");
    require(service.redo().succeeded,
            "wire-cell replacement must be redoable");
    const LadderRung *redone = service.findRung(logic_id, first_cell_rung.id);
    require(redone != nullptr && redone->condition.has_value()
                && redone->condition->kind == ConditionExpressionKind::Series
                && conditionColumns(*redone->condition) == 4,
            "redo must restore the split wire without changing its width");
    const std::string redone_trailing_wire_id =
        redone->condition->children.back().id;

    const LogicEditorResult last_cell_rung = service.addRung(logic_id);
    const LogicEditorResult last_cell_wire = service.appendWire(
        logic_id, last_cell_rung.id, 4);
    require(last_cell_rung.succeeded && last_cell_wire.succeeded
                && service.replaceWireColumnWithCondition(
                    logic_id,
                    last_cell_rung.id,
                    last_cell_wire.id,
                    3,
                    contact(11))
                    .succeeded,
            "the last cell of a multi-column wire must be replaceable");
    const LadderRung *last_cell = service.findRung(logic_id, last_cell_rung.id);
    require(last_cell != nullptr && last_cell->condition.has_value()
                && last_cell->condition->kind == ConditionExpressionKind::Series
                && last_cell->condition->children.size() == 2U
                && last_cell->condition->children.front().kind
                    == ConditionExpressionKind::Wire
                && last_cell->condition->children.front().wire->columnSpan == 3
                && last_cell->condition->children.back().kind
                    == ConditionExpressionKind::Node,
            "last-cell replacement must preserve the leading wire cells");

    const LogicEditorResult single_cell_rung = service.addRung(logic_id);
    const LogicEditorResult single_cell_wire = service.appendWire(
        logic_id, single_cell_rung.id, 1);
    require(single_cell_rung.succeeded && single_cell_wire.succeeded
                && service.replaceWireColumnWithCondition(
                    logic_id,
                    single_cell_rung.id,
                    single_cell_wire.id,
                    0,
                    contact(12))
                    .succeeded,
            "a one-column wire must use the same grid-cell replacement API");
    const LadderRung *single_cell = service.findRung(
        logic_id, single_cell_rung.id);
    require(single_cell != nullptr && single_cell->condition.has_value()
                && single_cell->condition->kind == ConditionExpressionKind::Node,
            "one-column wire replacement must normalize directly to a condition node");

    require(service.replaceWireColumnWithCondition(
                logic_id,
                first_cell_rung.id,
                redone_trailing_wire_id,
                0,
                CoilNodeConfig{
                    RegisterAddress{RegisterArea::M, 13}, CoilMode::Set})
                .error == LogicEditorError::InvalidNode,
            "wire grid cells must reject output instructions");
    require(service.replaceWireColumnWithCondition(
                logic_id,
                first_cell_rung.id,
                "missing-wire",
                0,
                contact(13))
                .error == LogicEditorError::ExpressionNotFound,
            "wire grid replacement must reject an unknown wire without mutation");
}

void testSequentialConditionInsertionConsumesFollowingWire()
{
    TestProjectStorage storage;
    ProjectService project_service(storage);
    LogicEditorService service(project_service);
    const std::string logic_id = service.ensureDefaultLogic().id;
    const std::string rung_id = makeEmptyRung(service, logic_id);
    const LogicEditorResult wire = service.appendWire(logic_id, rung_id, 10);
    require(wire.succeeded,
            "sequential wire replacement must start with a full-width wire");

    LogicEditorResult inserted = service.replaceWireColumnWithCondition(
        logic_id, rung_id, wire.id, 0, contact(0));
    require(inserted.succeeded,
            "the first condition must replace the first full-wire cell");
    std::string selected_node_id = inserted.id;
    for (int address = 1; address < 10; ++address)
    {
        inserted = service.insertConditionAfter(
            logic_id, rung_id, selected_node_id, contact(address));
        require(inserted.succeeded,
                "continuous condition insertion must consume the following wire cell");
        selected_node_id = inserted.id;

        const LadderRung *rung = service.findRung(logic_id, rung_id);
        std::vector<const LogicNode *> nodes;
        collectConditionNodes(*rung->condition, &nodes);
        require(rung != nullptr && rung->condition.has_value()
                    && conditionColumns(*rung->condition) == 10
                    && nodes.size() == static_cast<std::size_t>(address + 1)
                    && wireColumns(*rung->condition) == 9 - address,
                "each continuous insertion must preserve width while consuming one wire cell");
    }

    const LadderRung *full = service.findRung(logic_id, rung_id);
    require(full != nullptr && full->condition.has_value()
                && conditionColumns(*full->condition) == 10
                && wireColumns(*full->condition) == 0,
            "ten continuous insertions must replace the entire wire without expanding it");
    require(service.insertConditionAfter(
                logic_id, rung_id, selected_node_id, contact(10))
                .error == LogicEditorError::InvalidOperation,
            "the eleventh condition must still be rejected after all wire cells are consumed");
    require(conditionColumns(*service.findRung(
                logic_id, rung_id)->condition) == 10,
            "a rejected eleventh insertion must leave the full network unchanged");

    require(service.undo().succeeded,
            "a failed eleventh insertion must not displace the last successful undo step");
    const LadderRung *undone = service.findRung(logic_id, rung_id);
    std::vector<const LogicNode *> undone_nodes;
    collectConditionNodes(*undone->condition, &undone_nodes);
    require(undone_nodes.size() == 9U
                && wireColumns(*undone->condition) == 1
                && conditionColumns(*undone->condition) == 10,
            "undo must restore nine contacts followed by one wire cell");
    require(service.redo().succeeded,
            "the final wire-consuming insertion must be redoable");
    const LadderRung *redone = service.findRung(logic_id, rung_id);
    std::vector<const LogicNode *> redone_nodes;
    collectConditionNodes(*redone->condition, &redone_nodes);
    require(redone_nodes.size() == 10U
                && wireColumns(*redone->condition) == 0
                && conditionColumns(*redone->condition) == 10,
            "redo must restore all ten contacts without wire cells");
}

void testLogicLifecycleAndOrdering()
{
    TestProjectStorage storage;
    ProjectService project_service(storage);
    LogicEditorService service(project_service);
    const std::string first_id = service.ensureDefaultLogic().id;
    const LogicEditorResult second = service.addLogic("Safety logic");
    const LogicEditorResult third = service.addLogic("Alarm logic");
    require(second.succeeded && third.succeeded,
            "multiple control logic modules must be creatable");
    require(service.renameLogic(second.id, "Interlock logic").succeeded,
            "control logic modules must be renamable by stable id");
    require(service.renameLogic(third.id, "Interlock logic").error
                == LogicEditorError::DuplicateName,
            "control logic names must remain unique");
    require(service.moveLogic(third.id, -1).succeeded
                && project_service.project().controlLogics.at(1).id == third.id,
            "logic scan order must follow editable vector order");
    require(service.setLogicEnabled(second.id, false).succeeded
                && !service.findLogic(second.id)->enabled,
            "a control logic module must support explicit disable and enable");
    require(service.setLogicEnabled(second.id, true).succeeded
                && service.findLogic(second.id)->enabled,
            "a disabled control logic module must be re-enableable");
    require(service.removeLogic(third.id).succeeded,
            "a non-final control logic module must be deletable");
    require(service.removeLogic(second.id).succeeded,
            "logic deletion must preserve the remaining module");
    require(service.removeLogic(first_id).error
                == LogicEditorError::LastLogicRequired,
            "the project must retain at least one control logic module");
}

void testEdgeNodesAndRungComments()
{
    TestProjectStorage storage;
    ProjectService project_service(storage);
    LogicEditorService service(project_service);
    const std::string logic_id = service.ensureDefaultLogic().id;
    const std::string rung_id = makeEmptyRung(service, logic_id);

    const LogicEditorResult rising = service.appendCondition(
        logic_id,
        rung_id,
        EdgeContactNodeConfig{
            RegisterAddress{RegisterArea::M, 3}, EdgeMode::Rising});
    require(rising.succeeded && rising.id == "edge-1",
            "the editor must create rising edge nodes with a stable prefix");
    require(service.updateNodeConfig(
                logic_id,
                rising.id,
                EdgeContactNodeConfig{
                    RegisterAddress{RegisterArea::M, 4}, EdgeMode::Falling})
                .succeeded,
            "the editor must apply edge mode and M address properties");
    require(service.updateRungComment(logic_id, rung_id, "延时启动网络").succeeded,
            "the editor must update a network comment by stable rung id");
    require(!service.updateRungComment(
                logic_id, rung_id, "第一行\n第二行").succeeded,
            "the editor must reject multiline network comments");
    require(!service.updateRungComment(
                logic_id,
                rung_id,
                std::string(ProjectLimits::kMaximumRungCommentBytes + 1U, 'a'))
                 .succeeded,
            "the editor must reject oversized network comments");

    const LadderRung *rung = service.findRung(logic_id, rung_id);
    const LogicNode *edge = service.findNode(logic_id, rising.id);
    require(rung != nullptr && rung->comment == "延时启动网络"
                && edge != nullptr
                && std::get<EdgeContactNodeConfig>(edge->config).mode
                    == EdgeMode::Falling,
            "edge and rung comment updates must remain in the model");
}

void testHistoryAndAtomicBatchDelete()
{
    TestProjectStorage storage;
    ProjectService project_service(storage);
    LogicEditorService service(project_service);
    const std::string logic_id = service.ensureDefaultLogic().id;
    const std::string first_rung_id = makeEmptyRung(service, logic_id);
    const LogicEditorResult first = service.appendCondition(
        logic_id, first_rung_id, contact(0));
    const LogicEditorResult second = service.appendCondition(
        logic_id, first_rung_id, contact(1));
    const LogicEditorResult second_rung = service.addRung(logic_id);
    const LogicEditorResult third = service.appendCondition(
        logic_id, second_rung.id, contact(2));
    require(first.succeeded && second.succeeded && second_rung.succeeded
                && third.succeeded,
            "nodes for history testing must be created");

    service.clearHistory();
    require(!service.removeNodes(logic_id, {first.id, "missing-node"}).succeeded,
            "batch node deletion must validate every id before changing the logic");
    require(service.findNode(logic_id, first.id) != nullptr
                && service.findNode(logic_id, third.id) != nullptr
                && !service.canUndo(),
            "failed batch node deletion must be atomic and leave history unchanged");

    require(service.removeNodes(logic_id, {first.id, third.id}).succeeded,
            "valid nodes across multiple rungs must be deleted together");
    require(service.findNode(logic_id, first.id) == nullptr
                && service.findNode(logic_id, third.id) == nullptr,
            "all selected nodes must be removed by one batch operation");
    require(service.undo().succeeded
                && service.findNode(logic_id, first.id) != nullptr
                && service.findNode(logic_id, third.id) != nullptr,
            "logic undo must restore a cross-rung batch deletion");
    require(service.redo().succeeded
                && service.findNode(logic_id, first.id) == nullptr
                && service.findNode(logic_id, third.id) == nullptr,
            "logic redo must reapply a cross-rung batch deletion");

    service.clearHistory();
    const ControlLogic *logic = service.findLogic(logic_id);
    require(logic != nullptr && service.setLogicEnabled(logic_id, logic->enabled).succeeded
                && !service.canUndo(),
            "setting an unchanged logic state must not consume history");

    service.clearHistory();
    for (int index = 1; index <= 101; ++index)
    {
        require(service.updateRungComment(
                    logic_id, first_rung_id, "comment-" + std::to_string(index))
                    .succeeded,
                "repeated valid rung edits must succeed");
    }
    int undo_count = 0;
    while (service.undo().succeeded)
    {
        ++undo_count;
    }
    require(undo_count == static_cast<int>(EditorHistory<int>::kMaximumEntries),
            "logic history must retain exactly the configured most recent steps");

    require(service.redo().succeeded,
            "logic redo must be available after an undo");
    require(service.appendCondition(logic_id, first_rung_id, contact(5)).succeeded,
            "a new logic edit must succeed after undo");
    require(!service.canRedo(),
            "a new logic edit must clear the redo history");
    (void)second;
}

void testBatchPasteNodesAndRung()
{
    TestProjectStorage storage;
    ProjectService project_service(storage);
    LogicEditorService service(project_service);
    const std::string logic_id = service.ensureDefaultLogic().id;
    const std::string rung_id = makeEmptyRung(service, logic_id);
    const LogicEditorResult first = service.appendCondition(
        logic_id, rung_id, contact(10));
    const LogicEditorResult second = service.appendCondition(
        logic_id, rung_id, contact(11));
    require(first.succeeded && second.succeeded,
            "nodes for paste testing must be created");

    const LogicNode first_copy = *service.findNode(logic_id, first.id);
    const LogicNode second_copy = *service.findNode(logic_id, second.id);
    service.clearHistory();
    const LogicEditorResult pasted = service.pasteConditionNodes(
        logic_id, rung_id, {first_copy, second_copy});
    require(pasted.succeeded
                && service.findNode(logic_id, pasted.id) != nullptr
                && service.findRung(logic_id, rung_id)->condition.has_value()
                && conditionNodes(*service.findRung(logic_id, rung_id)->condition) == 4U,
            "batch condition paste must append fresh nodes");
    require(pasted.id != first.id && pasted.id != second.id
                && service.undo().succeeded
                && conditionNodes(*service.findRung(logic_id, rung_id)->condition) == 2U,
            "batch condition paste must use fresh ids and one undo step");
    require(service.areConditionNodesContiguous(
                logic_id, rung_id, {first.id, second.id}),
            "adjacent nodes in one series must be copyable as a range");

    const std::string wire_rung_id = makeEmptyRung(service, logic_id);
    const LogicEditorResult wire = service.appendWire(logic_id, wire_rung_id, 3);
    service.clearHistory();
    LogicConditionPasteTarget wire_target;
    wire_target.kind = LogicConditionPasteTargetKind::ReplaceWireColumn;
    wire_target.expressionId = wire.id;
    wire_target.column = 1;
    const LogicEditorResult pasted_on_wire = service.pasteConditionNodes(
        logic_id, wire_rung_id, {first_copy, second_copy}, wire_target);
    const LadderRung *wire_rung = service.findRung(logic_id, wire_rung_id);
    require(pasted_on_wire.succeeded && wire_rung != nullptr
                && wire_rung->condition.has_value()
                && conditionNodes(*wire_rung->condition) == 2
                && conditionColumns(*wire_rung->condition) == 3,
            "condition paste must replace the selected wire cell and consume following wire cells");
    require(service.undo().succeeded
                && wireColumns(*service.findRung(logic_id, wire_rung_id)->condition) == 3,
            "wire-targeted paste must be undone as one edit");

    const std::string full_rung_id = makeEmptyRung(service, logic_id);
    for (int address = 0; address < 9; ++address)
    {
        require(service.appendCondition(logic_id, full_rung_id, contact(address)).succeeded,
                "nine conditions must fit before an atomic paste failure test");
    }
    service.clearHistory();
    require(!service.pasteConditionNodes(
                logic_id, full_rung_id, {first_copy, second_copy}).succeeded
                && conditionNodes(*service.findRung(logic_id, full_rung_id)->condition) == 9
                && !service.canUndo(),
            "a multi-node paste that exceeds ten columns must roll back completely");

    const LogicEditorResult third = service.appendCondition(
        logic_id, rung_id, contact(12));
    require(third.succeeded
                && !service.areConditionNodesContiguous(
                    logic_id, rung_id, {first.id, third.id}),
            "non-adjacent nodes must not be copied as one condition range");
    const LogicEditorResult output = service.setOutput(
        logic_id,
        rung_id,
        CoilNodeConfig{RegisterAddress{RegisterArea::M, 20}, CoilMode::Set},
        true);
    require(output.succeeded, "the source rung must accept an output before copying");
    const LadderRung source = *service.findRung(logic_id, rung_id);
    service.clearHistory();
    const std::size_t rung_count_before_paste = service.findLogic(logic_id)->rungs.size();
    const LogicEditorResult pasted_rung = service.pasteRung(logic_id, source);
    require(pasted_rung.succeeded
                && service.findLogic(logic_id)->rungs.size()
                    == rung_count_before_paste + 1U
                && pasted_rung.id != source.id,
            "whole rung paste must append a new network");
    const LadderRung *copy = service.findRung(logic_id, pasted_rung.id);
    require(copy != nullptr && copy->condition.has_value()
                && copy->condition->id != source.condition->id
                && copy->output.has_value() && source.output.has_value()
                && copy->output->id != source.output->id
                && std::get<CoilNodeConfig>(copy->output->config).address.index() == 20
                && std::get<CoilNodeConfig>(copy->output->config).mode == CoilMode::Set,
            "whole rung paste must regenerate ids and preserve output configuration");
}

void testConditionPasteTargetsAndValidation()
{
    TestProjectStorage storage;
    ProjectService project_service(storage);
    LogicEditorService service(project_service);
    const std::string logic_id = service.ensureDefaultLogic().id;

    LogicNode source;
    source.id = "copied-condition";
    source.config = contact(90);
    source.configured = true;

    const std::string empty_column_rung = makeEmptyRung(service, logic_id);
    LogicConditionPasteTarget empty_column;
    empty_column.kind = LogicConditionPasteTargetKind::EmptyColumn;
    empty_column.column = 2;
    require(service.pasteConditionNodes(
                logic_id, empty_column_rung, {source}, empty_column).succeeded,
            "condition paste must support an empty grid column");
    require(conditionColumns(*service.findRung(
                logic_id, empty_column_rung)->condition) == 3,
            "empty-column paste must preserve the requested column offset");

    const std::string branch_rung = makeEmptyRung(service, logic_id);
    const LogicEditorResult branch_source = service.appendCondition(
        logic_id, branch_rung, contact(1));
    const LogicEditorResult branch_source_two = service.appendCondition(
        logic_id, branch_rung, contact(2));
    const LogicEditorResult branch_source_three = service.appendCondition(
        logic_id, branch_rung, contact(3));
    require(branch_source.succeeded && branch_source_two.succeeded
                && branch_source_three.succeeded,
            "branch paste setup must add a source range");
    const LogicEditorResult branch = service.addParallelBranch(
        logic_id, branch_rung,
        {branch_source.id, branch_source_two.id, branch_source_three.id},
        contact(4));
    require(branch.succeeded, "branch paste setup must create a parallel branch");
    const ConditionExpression &paste_lower = service.findRung(
        logic_id, branch_rung)->condition->children.at(1);
    require(paste_lower.kind == ConditionExpressionKind::Series
                && paste_lower.children.back().kind == ConditionExpressionKind::Wire,
            "branch paste setup must persist the short branch padding wire");
    LogicConditionPasteTarget branch_target;
    branch_target.kind = LogicConditionPasteTargetKind::ReplaceWireColumn;
    branch_target.expressionId = paste_lower.children.back().id;
    branch_target.column = 1;
    require(service.pasteConditionNodes(
                logic_id, branch_rung, {source}, branch_target).succeeded,
            "condition paste must support a persisted wire cell in a branch");

    const std::string after_node_rung = makeEmptyRung(service, logic_id);
    const LogicEditorResult after_source = service.appendCondition(
        logic_id, after_node_rung, contact(3));
    require(after_source.succeeded, "after-node paste setup must add a source node");
    LogicConditionPasteTarget after_target;
    after_target.kind = LogicConditionPasteTargetKind::AfterNode;
    after_target.expressionId = after_source.id;
    require(service.pasteConditionNodes(
                logic_id, after_node_rung, {source}, after_target).succeeded,
            "condition paste must support insertion after a selected node");
    require(conditionNodes(*service.findRung(
                logic_id, after_node_rung)->condition) == 2,
            "after-node paste must add exactly one condition");

    const std::string replace_wire_rung = makeEmptyRung(service, logic_id);
    const LogicEditorResult wire = service.appendWire(
        logic_id, replace_wire_rung, 2);
    require(wire.succeeded, "replace-wire paste setup must add a wire");
    LogicConditionPasteTarget replace_wire;
    replace_wire.kind = LogicConditionPasteTargetKind::ReplaceWire;
    replace_wire.expressionId = wire.id;
    require(service.pasteConditionNodes(
                logic_id, replace_wire_rung, {source}, replace_wire).succeeded,
            "condition paste must replace an entire wire expression");
    require(conditionNodes(*service.findRung(
                logic_id, replace_wire_rung)->condition) == 1,
            "whole-wire paste must create one condition node");

    const std::string replace_cell_rung = makeEmptyRung(service, logic_id);
    const LogicEditorResult cell_wire = service.appendWire(
        logic_id, replace_cell_rung, 3);
    require(cell_wire.succeeded, "replace-cell paste setup must add a wire");
    LogicConditionPasteTarget replace_cell;
    replace_cell.kind = LogicConditionPasteTargetKind::ReplaceWireColumn;
    replace_cell.expressionId = cell_wire.id;
    replace_cell.column = 1;
    require(service.pasteConditionNodes(
                logic_id, replace_cell_rung, {source}, replace_cell).succeeded,
            "condition paste must replace one selected wire cell");
    require(conditionColumns(*service.findRung(
                logic_id, replace_cell_rung)->condition) == 3,
            "wire-cell paste must preserve the original network width");

    require(!service.pasteConditionNodes(logic_id, after_node_rung, {}).succeeded,
            "an empty condition clipboard must be rejected");
    LogicNode output = source;
    output.config = CoilNodeConfig{RegisterAddress{RegisterArea::M, 91}, CoilMode::Normal};
    require(!service.pasteConditionNodes(
                logic_id, after_node_rung, {output}).succeeded,
            "an output instruction must not be pasted into the condition area");
    require(!service.pasteConditionNodes(
                "missing-logic", after_node_rung, {source}).succeeded,
            "condition paste must reject an unknown logic");
    require(!service.pasteConditionNodes(
                logic_id, "missing-rung", {source}).succeeded,
            "condition paste must reject an unknown rung");

    const LadderRung *before_invalid = service.findRung(
        logic_id, after_node_rung);
    require(before_invalid != nullptr && before_invalid->condition.has_value(),
            "invalid paste setup must retain its target network");
    const int node_count_before_invalid = conditionNodes(*before_invalid->condition);
    LogicConditionPasteTarget invalid_target;
    invalid_target.kind = LogicConditionPasteTargetKind::AfterNode;
    invalid_target.expressionId = "missing-expression";
    service.clearHistory();
    require(!service.pasteConditionNodes(
                logic_id, after_node_rung, {source}, invalid_target).succeeded
                && conditionNodes(*service.findRung(
                    logic_id, after_node_rung)->condition) == node_count_before_invalid
                && !service.canUndo(),
            "an invalid paste target must roll back without recording history");
}

void testConfiguredLogicLimits()
{
    TestProjectStorage storage;
    ProjectLimitSettings limits;
    limits.maximumControlLogics = 1U;
    limits.maximumRungsPerLogic = 0U;
    ProjectService project_service(storage, limits);
    LogicEditorService service(project_service);

    const LogicEditorResult initial = service.ensureDefaultLogic();
    require(initial.succeeded,
            "the configured-limit fixture must create its one default logic");
    require(!service.addLogic("Second logic").succeeded,
            "the logic editor must use the configured logic-group limit");
    require(!service.addRung(initial.id).succeeded,
            "the logic editor must use the configured per-logic rung limit");
}

} // namespace

int main()
{
    try
    {
        testEmptyLogicCreatesNetworksOnFirstEdit();
        testAppendingWireMovesToNextNetworkAfterTenColumns();
        testStructuredEditingAndNormalization();
        testRangeParallelInsertion();
        testParallelBranchGridInsertion();
        testStructuredWireEditing();
        testWireCellParallelSelectionUsesExactColumns();
        testWireCellParallelSelectionAcrossAdjacentWires();
        testBatchDeleteAllNodesInParallelBranch();
        testConditionColumnLimit();
        testUnconditionalOutputEditing();
        testExplicitGapEditing();
        testColumnTargetedConditionInsertion();
        testWireColumnReplacement();
        testSequentialConditionInsertionConsumesFollowingWire();
        testLogicLifecycleAndOrdering();
        testEdgeNodesAndRungComments();
        testHistoryAndAtomicBatchDelete();
        testBatchPasteNodesAndRung();
        testConditionPasteTargetsAndValidation();
        testConfiguredLogicLimits();
    }
    catch (const std::exception &error)
    {
        std::cerr << "logic editor service tests failed: " << error.what() << '\n';
        return 1;
    }
    std::cout << "logic editor service tests passed\n";
    return 0;
}