#include "plcdocument.h"
#include <QGraphicsScene>
#include <QGraphicsView>
#include <QPainter>
#include <QBrush>
#include <QPen>
#include <QFile>
#include <QJsonDocument>
#include <QJsonObject>
#include <QJsonArray>
#include <QFileInfo>
#include <QVBoxLayout>

PLCDocument::PLCDocument(QWidget *parent)
    : BaseDocument(PLC, parent)
{
    // 创建绘图场景
    m_scene = new QGraphicsScene(this);
    m_scene->setSceneRect(0, 0, 800, 600);

    // 创建网格背景
    createGridBackground();

    // 创建视图
    m_view = new QGraphicsView(m_scene, this);
    m_view->setRenderHint(QPainter::Antialiasing);
    m_view->setDragMode(QGraphicsView::RubberBandDrag);

    // 布局（让视图占满文档区域）
    auto layout = new QVBoxLayout(this);
    layout->setContentsMargins(0, 0, 0, 0);
    layout->addWidget(m_view);
    setLayout(layout);
}

PLCDocument::~PLCDocument()
{
    // 场景和视图由Qt自动销毁
}

QString PLCDocument::title() const {
    return "PLC文档";
}

void PLCDocument::createGridBackground()
{
    // 创建网格图案
    createGridPattern();

    // 设置场景背景
    QBrush gridBrush(m_gridPattern);
    m_scene->setBackgroundBrush(gridBrush);
}

void PLCDocument::createGridPattern()
{
    // 网格大小
    const int size = m_gridSize;

    // 创建网格图案
    m_gridPattern = QPixmap(size * 2, size * 2);
    m_gridPattern.fill(Qt::white);

    QPainter painter(&m_gridPattern);
    painter.setPen(QPen(QColor(220, 220, 220), 1));

    // 绘制网格线
    painter.drawLine(0, size, size * 2, size);    // 水平线
    painter.drawLine(size, 0, size, size * 2);    // 垂直线

    // 绘制网格交点
    painter.setPen(QPen(QColor(180, 180, 180), 1));
    painter.drawPoint(0, 0);
    painter.drawPoint(size, size);
    painter.drawPoint(0, size * 2);
    painter.drawPoint(size * 2, 0);
    painter.drawPoint(size * 2, size * 2);
}

bool PLCDocument::saveToFile(const QString &filePath)
{

}

bool PLCDocument::loadFromFile(const QString &filePath)
{

}