#include "editorwidget.h"
#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QCoreApplication>
#include <QDateTime>
#include <QKeyEvent>
#include <QContextMenuEvent>

EditorWidget::EditorWidget(QWidget* parent) : QWidget(parent) {
    // 主垂直布局（包含上部编辑区和下部输出框）
    QVBoxLayout* mainLayout = new QVBoxLayout(this);
    mainLayout->setContentsMargins(10, 10, 10, 10);//布局管理器内边距
    mainLayout->setSpacing(10);//布局内容之间边距


    // 上部容器（包含工具栏和编辑区）
    QWidget* topContainer = new QWidget();
    QHBoxLayout* topLayout = new QHBoxLayout(topContainer);
    topLayout->setContentsMargins(10, 10, 10, 10);
    topLayout->setSpacing(10);

    // 左侧工具栏布局
    QVBoxLayout* leftLayout = new QVBoxLayout();
    leftLayout->setSpacing(5);

    // 初始化工具栏
    toolbar = new QListWidget(this);
    toolbar->setViewMode(QListWidget::IconMode);
    toolbar->setIconSize(QSize(48, 48));
    toolbar->setFixedWidth(100);
    toolbar->setSpacing(10);
    toolbar->setDragEnabled(false);
    leftLayout->addWidget(toolbar);

    // 初始化编辑区域
    editArea = new QGraphicsView(this);
    editArea->setRenderHint(QPainter::Antialiasing);//抗锯齿
    editArea->setViewportUpdateMode(QGraphicsView::FullViewportUpdate);//全视口更新
    editArea->setOptimizationFlags(QGraphicsView::DontSavePainterState | QGraphicsView::DontAdjustForAntialiasing);
    editArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAsNeeded);//按需显示滚动条
    editArea->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
    //editArea->setDragMode(QGraphicsView::ScrollHandDrag);
    // 添加到上部布局
    topLayout->addLayout(leftLayout);
    topLayout->addWidget(editArea, 1);

    // 初始化输出框
    outputTextEdit = new QTextEdit(this);
    outputTextEdit->setReadOnly(true);
    outputTextEdit->setFixedHeight(120);
    outputTextEdit->setStyleSheet(
        "QTextEdit {"
        "   background-color: #f0f0f0;"
        "   border: 1px solid #cccccc;"
        "   padding: 5px;"
        "   font-family: Consolas, 'Courier New', monospace;"
        "   font-size: 10pt;"
        "}"
    );

    // 添加到主布局
    mainLayout->addWidget(topContainer, 1);
    mainLayout->addWidget(outputTextEdit);

    // 安装事件过滤器
    editArea->installEventFilter(this);

    // 连接工具栏点击信号
    connect(toolbar, &QListWidget::itemClicked, this, &EditorWidget::onToolbarItemClicked);

    appendOutput("编辑器初始化完成");
}

EditorWidget::~EditorWidget() {}

void EditorWidget::appendOutput(const QString& message) {
    QString timestamp = QDateTime::currentDateTime().toString("[hh:mm:ss] ");
    outputTextEdit->append(timestamp + message);
    QTextCursor cursor = outputTextEdit->textCursor();
    cursor.movePosition(QTextCursor::End);
    outputTextEdit->setTextCursor(cursor);
}

//界面初始化
void EditorWidget::ensureViewReady() {
    //强制处理
    QCoreApplication::processEvents();
    //重置
    editArea->resetTransform();
    //视图更新
    editArea->viewport()->update();
    //如果为空
    if (editArea->viewport()->rect().isEmpty()) {
        editArea->setFixedSize(600, 400);
        QCoreApplication::processEvents();
    }
}

void EditorWidget::showEvent(QShowEvent* event) {
    QWidget::showEvent(event);
    //首次显示
    if (firstShow) {
        firstShow = false;
        ensureViewReady();
    }
}

void EditorWidget::resizeEvent(QResizeEvent* event) {
    QWidget::resizeEvent(event);
    ensureViewReady();
}

bool EditorWidget::eventFilter(QObject* obj, QEvent* event) {
    if (obj == editArea && event->type() == QEvent::ContextMenu) {
        // 可由派生类扩展上下文菜单逻辑
        return true;
    }
    return QWidget::eventFilter(obj, event);
}

void EditorWidget::keyPressEvent(QKeyEvent* event) {
    // 可由派生类扩展键盘事件逻辑
    QWidget::keyPressEvent(event);
}