#include "launcherpage.h"
#include <QGridLayout>
#include <QResizeEvent>
#include <QPainter>
#include <QPainterPath>
#include <QTimer>
#include <QDebug>

LauncherPage::LauncherPage(const PageConfig &config, QWidget *parent)
    : QWidget(parent), m_config(config), m_columns(4), m_rows(3), m_horizontalGap(20), m_verticalGap(18), m_horizontalPadding(30), m_verticalPadding(20)
{
  setObjectName("launcherPage_" + config.id);
  setupUI();
}

LauncherPage::~LauncherPage()
{
}

void LauncherPage::setupUI()
{
  // 设置背景透明，同时确保可以绑定paintEvent
  setAttribute(Qt::WA_StyledBackground, true);
  setStyleSheet("background: transparent;");

  qDebug() << "=== LauncherPage setupUI ===";
  qDebug() << "Page ID:" << m_config.id;
  qDebug() << "Apps count:" << m_config.apps.size();

  // 创建图标（不使用布局，使用绝对定位）
  for (int i = 0; i < m_config.apps.size(); ++i)
  {
    const auto &appData = m_config.apps[i];
    qDebug() << "Creating icon for:" << appData.name << "(" << appData.id << ")" << "group:" << appData.group;
    AppIcon *icon = new AppIcon(appData, this);
    icon->setFixedSize(190, 180);
    connect(icon, &AppIcon::clicked, this, &LauncherPage::appClicked);
    connect(icon, &AppIcon::longPressed, this, &LauncherPage::appLongPressed);
    m_icons.append(icon);

    // 收集分组信息
    if (!appData.group.isEmpty())
    {
      if (!m_groups.contains(appData.group))
      {
        GroupInfo info;
        info.groupId = appData.group;
        m_groups[appData.group] = info;
      }
      m_groups[appData.group].iconIndices.append(i);
    }
  }

  qDebug() << "Total icons created:" << m_icons.size();
  qDebug() << "Groups found:" << m_groups.keys();
}

void LauncherPage::resizeEvent(QResizeEvent *event)
{
  QWidget::resizeEvent(event);
  layoutIcons();
}

void LauncherPage::layoutIcons()
{
  if (m_icons.isEmpty())
  {
    qDebug() << "layoutIcons: No icons to layout!";
    return;
  }

  int w = width();
  int h = height();

  qDebug() << "=== layoutIcons ===";
  qDebug() << "Page ID:" << m_config.id;
  qDebug() << "Widget size:" << w << "x" << h;
  qDebug() << "Icons count:" << m_icons.size();

  // Android风格：图标均匀分布
  int iconWidth = 190;
  int iconHeight = 180;

  // 动态计算可以容纳的行数
  int minVerticalSpacing = 12;
  int maxPossibleRows = (h + minVerticalSpacing) / (iconHeight + minVerticalSpacing);
  int actualRows = qMin(maxPossibleRows, m_rows);
  actualRows = qMax(actualRows, 1); // 至少显示1行

  qDebug() << "Max possible rows:" << maxPossibleRows << "Using rows:" << actualRows;

  // 计算间距，使图标均匀分布
  int horizontalSpacing = (w - m_columns * iconWidth) / (m_columns + 1);
  int verticalSpacing = (h - actualRows * iconHeight) / (actualRows + 1);

  // 确保最小间距
  horizontalSpacing = qMax(horizontalSpacing, 10);
  verticalSpacing = qMax(verticalSpacing, 12);

  qDebug() << "Spacing - H:" << horizontalSpacing << "V:" << verticalSpacing;

  // 重新计算起始位置使其居中
  int startX = (w - (m_columns * iconWidth + (m_columns - 1) * horizontalSpacing)) / 2;
  int startY = (h - (actualRows * iconHeight + (actualRows - 1) * verticalSpacing)) / 2;

  qDebug() << "Start position - X:" << startX << "Y:" << startY;

  // 布局图标，同时记录位置用于分组框计算
  QMap<int, QRect> iconRects;
  int index = 0;
  for (AppIcon *icon : m_icons)
  {
    int row = index / m_columns;
    int col = index % m_columns;

    if (row < actualRows)
    {
      int x = startX + col * (iconWidth + horizontalSpacing);
      int y = startY + row * (iconHeight + verticalSpacing);
      qDebug() << "  Icon" << index << "at" << x << "," << y;
      icon->move(x, y);
      icon->show();
      // 记录计算出的位置
      iconRects[index] = QRect(x, y, iconWidth, iconHeight);
    }
    else
    {
      qDebug() << "  Icon" << index << "hidden (too many rows)";
      icon->hide();
    }
    index++;
  }

  qDebug() << "layoutIcons done, visible icons:" << qMin(index, m_rows * m_columns);

  // 更新分组矩形，使用计算出的位置
  updateGroupRects(iconRects);
}

void LauncherPage::updateGroupRects(const QMap<int, QRect> &iconRects)
{
  // 为每个分组计算边界矩形
  for (auto it = m_groups.begin(); it != m_groups.end(); ++it)
  {
    GroupInfo &group = it.value();
    if (group.iconIndices.isEmpty())
      continue;

    QRect boundingRect;
    bool first = true;

    for (int idx : group.iconIndices)
    {
      if (iconRects.contains(idx))
      {
        QRect iconRect = iconRects[idx];
        qDebug() << "  Group icon" << idx << "rect:" << iconRect;
        if (first)
        {
          boundingRect = iconRect;
          first = false;
        }
        else
        {
          boundingRect = boundingRect.united(iconRect);
        }
      }
    }

    // 扩展边界矩形，添加内边距
    int padding = 3;
    group.boundingRect = boundingRect.adjusted(-padding, -padding, padding, padding);
    qDebug() << "Group" << group.groupId << "bounding rect:" << group.boundingRect;
  }

  // 触发重绘
  update();
}

void LauncherPage::paintEvent(QPaintEvent *event)
{
  QWidget::paintEvent(event);

  QPainter painter(this);
  painter.setRenderHint(QPainter::Antialiasing);

  // 绘制分组背景框
  for (const GroupInfo &group : m_groups)
  {
    qDebug() << "Drawing group:" << group.groupId << "rect:" << group.boundingRect;
    if (group.boundingRect.isValid() && !group.boundingRect.isEmpty())
    {
      // 设置半透明背景 - 增加透明度使其更明显
      QColor bgColor(255, 255, 255, 50); // 白色半透明
      painter.setBrush(bgColor);

      // 设置边框
      QColor borderColor(255, 255, 255, 100); // 白色半透明边框
      painter.setPen(QPen(borderColor, 2.0));

      // 绘制圆角矩形
      QPainterPath path;
      path.addRoundedRect(QRectF(group.boundingRect), 20, 20);
      painter.drawPath(path);
    }
  }
}