#include "project_model.h"

#include <algorithm>

namespace {

void setError(std::string *error, const std::string &message)
{
    if (error != nullptr)
    {
        *error = message;
    }
}

// 通过相邻区间查找避免为不同领域对象重复实现标识唯一性校验
template <typename TItem>
bool containsDuplicateId(const std::vector<TItem> &items)
{
    for (auto current = items.cbegin(); current != items.cend(); ++current)
    {
        const auto duplicate = std::find_if(
            current + 1,
            items.cend(),
            [&current](const TItem &item)
            {
                return item.id == current->id;
            });
        if (duplicate != items.cend())
        {
            return true;
        }
    }
    return false;
}

} // namespace

bool Project::validate(std::string *error) const
{
    if (metadata.id.empty() || metadata.name.empty() || metadata.formatVersion.empty())
    {
        setError(error, "project id, name and format version must not be empty");
        return false;
    }
    if (containsDuplicateId(hmiPages))
    {
        setError(error, "HMI page ids must be unique within a project");
        return false;
    }
    if (containsDuplicateId(controlLogics))
    {
        setError(error, "control logic ids must be unique within a project");
        return false;
    }
    for (auto current = dataPoints.cbegin(); current != dataPoints.cend(); ++current)
    {
        if (!current->validate(error))
        {
            return false;
        }
        const auto duplicate = std::find_if(
            current + 1,
            dataPoints.cend(),
            [&current](const DataPoint &candidate)
            {
                return candidate.address == current->address
                    || candidate.name == current->name;
            });
        if (duplicate != dataPoints.cend())
        {
            if (error != nullptr)
            {
                *error = "data point addresses and names must be unique";
            }
            return false;
        }
    }
    for (const HmiPage &page : hmiPages)
    {
        // 工程聚合校验会向下委托页面和控件的完整规则
        if (!page.validate(error))
        {
            return false;
        }
    }
    for (const ControlLogic &logic : controlLogics)
    {
        if (!logic.validate(error))
        {
            return false;
        }
    }
    return true;
}

bool Project::validateForRunning(std::string *error) const
{
    if (!validate(error))
    {
        return false;
    }
    for (const HmiPage &page : hmiPages)
    {
        if (!page.validateForRunning(error))
        {
            return false;
        }
    }
    for (const ControlLogic &logic : controlLogics)
    {
        if (!logic.validateForRunning(error))
        {
            return false;
        }
    }
    return true;
}