#include "mainwindow.h"
#include "ui_mainwindow.h"

#include "Presenter/Inc/DroneScrewCtrlPresenter.h"
#include "Presenter/Inc/ConfigManager.h"
#include "dialogalgoarg.h"
#include "dialogcamerasetting.h"
#include "resultitem.h"
#include "Version.h"

#include <QDateTime>
#include <QMessageBox>
#include <QResizeEvent>
#include <QPixmap>
#include <QListWidgetItem>
#include <QGraphicsView>
#include <QScreen>
#include <QApplication>
#include <QMenu>
#include <QAction>
#include <QFileDialog>
#include <QStandardPaths>
#include <QThread>
#include <QDir>
#include <QTimer>

#include "DeviceStatusWidget.h"
#include "DetectLogHelper.h"
#include "AboutDialog.h"
#include "ResultListLayoutHelper.h"

MainWindow::MainWindow(QWidget* parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    // 设置窗口图标
#ifdef _WIN32
    this->setWindowIcon(QIcon(":/dronescrewctrl/resource/logo.ico"));
#else
    this->setWindowIcon(QIcon(":/dronescrewctrl/resource/logo.png"));
#endif

    // 状态栏：右侧显示版本信息
    QFont statusFont = statusBar()->font();
    statusFont.setPointSize(12);
    statusBar()->setFont(statusFont);
    statusBar()->setStyleSheet("QStatusBar { color: rgb(239, 241, 245); padding: 20px; }");

    QString versionStr = QString("%1").arg(DRONESCREWCTRL_FULL_VERSION_STRING);
    QLabel* buildLabel = new QLabel(versionStr);
    buildLabel->setStyleSheet("color: rgb(239, 241, 245); font-size: 20px; margin-right: 16px;");
    buildLabel->setCursor(Qt::PointingHandCursor);
    buildLabel->installEventFilter(this);
    statusBar()->addPermanentWidget(buildLabel);
    m_versionLabel = buildLabel;

    initUi();

    // 无边框 + 最大化
    setWindowFlags(Qt::FramelessWindowHint);
    this->showMaximized();

    // 第二相机画面初始隐藏
    ui->detect_image_2->setVisible(false);

    // 初始化 detect_image_2 的 GraphicsScene
    QGraphicsScene* scene2 = new QGraphicsScene(this);
    ui->detect_image_2->setScene(scene2);

    // 设备状态组件放入 frame_dev
    m_deviceStatusWidget = new DeviceStatusWidget();
    QVBoxLayout* frameDevLayout = new QVBoxLayout(ui->frame_dev);
    frameDevLayout->setContentsMargins(0, 0, 0, 0);
    frameDevLayout->addWidget(m_deviceStatusWidget);

    // 本应用只有一个设备：隐藏机械臂、单设备占满、关闭相机切换点击
    m_deviceStatusWidget->setRobotVisible(false);
    m_deviceStatusWidget->setCameraCount(1);
    m_deviceStatusWidget->setCameraClickable(false);
    m_deviceStatusWidget->setCamera1Name(QStringLiteral("设备"));
    m_deviceStatusWidget->updateCamera1Status(false);

    // 日志辅助类
    m_logHelper = new DetectLogHelper(ui->detect_log, this);

    auto cfg = ConfigManager::Instance().GetConfig();
    m_maxResultItems = cfg.display.maxResultListItems;

    m_pPresenter = new DroneScrewCtrlPresenter(this);
    m_pPresenter->SetStatusReceiver(this);

    // 信号连接要在 InitApp 之前，避免漏掉启动时的首次连接/状态事件
    connect(m_pPresenter, &DroneScrewCtrlPresenter::statusMessage,
            this, [this](const QString& s) { appendLog(s); });
    connect(m_pPresenter, &DroneScrewCtrlPresenter::serverConnectionChanged,
            this, &MainWindow::OnServerConnectionChanged);
    connect(m_pPresenter, &DroneScrewCtrlPresenter::serverInfoReceived,
            this, &MainWindow::onServerInfoReceived);

    m_pPresenter->ApplyConfig(cfg);

    // 软件启动默认进入空闲态；不在主界面构造阶段向 Server 下发控制命令。
    applyUiState(UiState::Idle);

    // 网络发现放到窗口完成构造后执行，避免主界面显示前被 UDP/ZMQ 超时阻塞。
    QTimer::singleShot(100, this, [this]() {
        if (m_pPresenter)
            m_pPresenter->InitApp();
    });
}

MainWindow::~MainWindow()
{
    if (m_pPresenter)
    {
        m_pPresenter->DeinitApp();
        delete m_pPresenter;
        m_pPresenter = nullptr;
    }
    delete ui;
}

void MainWindow::initUi()
{
    setWindowTitle(QStringLiteral("无人机螺杆控制端"));

    // 主画面：QGraphicsScene + PixmapItem
    if (ui->detect_image)
    {
        m_pScene = new QGraphicsScene(this);
        m_pPixmapItem = new QGraphicsPixmapItem();
        m_pScene->addItem(m_pPixmapItem);
        ui->detect_image->setScene(m_pScene);
        ui->detect_image->setRenderHint(QPainter::SmoothPixmapTransform);
        ui->detect_image->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
        ui->detect_image->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    }

    // 隐藏工作状态标签
    if (ui->label_work) ui->label_work->hide();
}

void MainWindow::OnRtspFrame(const QImage& frame)
{
    m_currentImage = frame;
    renderDisplay();
}

void MainWindow::OnDetectionResult(const CtrlDetectionFrame& result)
{
    if (!ui->detect_result_list) return;

    QString head = QString(QStringLiteral("帧 #%1   目标 %2"))
                     .arg(result.frameId)
                     .arg(static_cast<int>(result.boxes.size()));
    QListWidgetItem* item = new QListWidgetItem(head, ui->detect_result_list);
    ResultItem* w = new ResultItem();
    w->setResultData(static_cast<int>(result.frameId), result);
    item->setSizeHint(w->sizeHint());
    ui->detect_result_list->addItem(item);
    ui->detect_result_list->setItemWidget(item, w);
    ui->detect_result_list->scrollToBottom();

    clampResultList();
}

void MainWindow::OnWorkStatusChanged(CtrlWorkStatus status)
{
    if (!ui->label_work) return;
    switch (status)
    {
    case CtrlWorkStatus::Idle:       ui->label_work->setText(QStringLiteral("空闲"));   break;
    case CtrlWorkStatus::Connecting: ui->label_work->setText(QStringLiteral("连接中")); break;
    case CtrlWorkStatus::Streaming:  ui->label_work->setText(QStringLiteral("拉流中")); break;
    case CtrlWorkStatus::Detecting:  ui->label_work->setText(QStringLiteral("检测中")); break;
    case CtrlWorkStatus::Error:      ui->label_work->setText(QStringLiteral("错误"));   break;
    }
}

void MainWindow::OnServerConnectionChanged(bool connected)
{
    if (ui->label_work)
        ui->label_work->setText(connected ? QStringLiteral("已连接")
                                          : QStringLiteral("未连接"));
    // 单设备状态联动
    if (m_deviceStatusWidget)
        m_deviceStatusWidget->updateCamera1Status(connected);
}

void MainWindow::onServerInfoReceived(const WDRemoteServerInfo& info)
{
    // 更新相机参数到 UI（如果有相机设置对话框，这里可以刷新）
    // 更新算法参数到 dialogalgoarg（延迟到对话框打开时读取，或缓存到成员变量）
    m_cachedServerInfo = info;
    appendLog(QStringLiteral("已从服务器获取参数：曝光=%.1f, 增益=%.1f, score=%.2f")
                  .arg(info.leftExposure)
                  .arg(info.leftGain)
                  .arg(static_cast<double>(info.algoScore)));
}

void MainWindow::OnStatusMessage(const QString& msg)
{
    appendLog(msg);
}

void MainWindow::appendLog(const QString& msg)
{
    if (m_logHelper)
        m_logHelper->appendLog(msg);
}

void MainWindow::clampResultList()
{
    if (!ui->detect_result_list) return;
    while (ui->detect_result_list->count() > m_maxResultItems)
    {
        QListWidgetItem* it = ui->detect_result_list->takeItem(0);
        delete it;
    }
}

void MainWindow::resizeEvent(QResizeEvent* event)
{
    QMainWindow::resizeEvent(event);
    renderDisplay();
}

void MainWindow::renderDisplay()
{
    if (!ui->detect_image || !m_pPixmapItem || !m_pScene) return;
    if (m_currentImage.isNull()) return;

    m_pPixmapItem->setPixmap(QPixmap::fromImage(m_currentImage));

    const QSize imageSize = m_currentImage.size();
    const QSize viewSize = ui->detect_image->viewport()
                               ? ui->detect_image->viewport()->size()
                               : ui->detect_image->size();
    if (imageSize != m_lastRenderImageSize || viewSize != m_lastRenderViewSize)
    {
        m_pScene->setSceneRect(m_pPixmapItem->boundingRect());
        ui->detect_image->fitInView(m_pPixmapItem, Qt::KeepAspectRatio);
        m_lastRenderImageSize = imageSize;
        m_lastRenderViewSize = viewSize;
    }
}

void MainWindow::applyUiState(UiState s)
{
    m_uiState = s;

    // 用 image 而非 background-image：图片会缩放填满按钮内容区，
    // 背景/边框与顶部工具按钮(btn_camera 等)保持一致
    static const QString kStartImg =
        QStringLiteral("image: url(:/common/resource/start_image.png); background-color: rgb(38, 40, 47); border: none;");
    static const QString kStopAll =
        QStringLiteral("image: url(:/common/resource/stop_all.png); background-color: rgb(38, 40, 47); border: none;");
    static const QString kStartDetect =
        QStringLiteral("image: url(:/common/resource/start_detect.png); background-color: rgb(38, 40, 47); border: none;");

    switch (s)
    {
    case UiState::Idle:
        // 空闲：主按钮=开始实时显示；检测按钮可用（支持不传图直接检测）
        ui->btn_start->setStyleSheet(kStartImg);
        ui->btn_start->setToolTip(QStringLiteral("开始实时显示"));
        ui->btn_detect_start->setStyleSheet(kStartDetect);
        ui->btn_detect_start->setToolTip(QStringLiteral("开始检测"));
        ui->btn_detect_start->setVisible(true);
        break;
    case UiState::Live:
        // 实时显示中：主按钮=停止；检测按钮可用
        ui->btn_start->setStyleSheet(kStopAll);
        ui->btn_start->setToolTip(QStringLiteral("停止"));
        ui->btn_detect_start->setStyleSheet(kStartDetect);
        ui->btn_detect_start->setToolTip(QStringLiteral("开始检测"));
        ui->btn_detect_start->setVisible(true);
        break;
    case UiState::Detect:
        // 检测中：主按钮=停止；检测按钮隐藏（避免重复触发）
        ui->btn_start->setStyleSheet(kStopAll);
        ui->btn_start->setToolTip(QStringLiteral("停止"));
        ui->btn_detect_start->setVisible(false);
        break;
    }
}

void MainWindow::on_btn_start_clicked()
{
    // 主开关：空闲 → 开始实时推流并拉流显示；运行中(实时/检测) → 全部停止
    if (m_uiState == UiState::Idle)
    {
        if (m_pPresenter && m_pPresenter->StartLiveStream())
        {
            appendLog(QStringLiteral("已请求 Server 开始实时推流"));
            applyUiState(UiState::Live);
        }
    }
    else
    {
        if (m_pPresenter) m_pPresenter->StopAll();
        appendLog(QStringLiteral("已请求 Server 停止"));
        applyUiState(UiState::Idle);
    }
}

void MainWindow::on_btn_detect_start_clicked()
{
    // 空闲或实时显示态均可开始检测（可不传图直接检测）；检测中则忽略。
    // StartDetection 内部会先停实时推流，从空闲进入也安全。
    if (m_uiState == UiState::Detect) return;
    if (m_pPresenter && m_pPresenter->StartDetection())
    {
        appendLog(QStringLiteral("已请求 Server 开始检测"));
        applyUiState(UiState::Detect);
    }
}

void MainWindow::on_btn_close_clicked()
{
    close();
}

void MainWindow::on_btn_hide_clicked()
{
    showMinimized();
}

void MainWindow::on_btn_camera_clicked()
{
    // 「相机」按钮 → 相机设置：Server IP + 曝光时间(μs) + 增益
    auto cfg0 = ConfigManager::Instance().GetConfig();

    DialogCameraSetting dlg(this);

    // 优先使用从 Server 读取的参数
    DroneScrewCameraParams camParams = cfg0.camera;
    if (m_cachedServerInfo.ok)
    {
        camParams.exposure = m_cachedServerInfo.leftExposure;
        camParams.gain     = m_cachedServerInfo.leftGain;
    }
    dlg.SetParams(QString::fromStdString(cfg0.server.serverIp), camParams);

    // 存盘 + 下发：IP 变化才重连，曝光/增益始终实时下发
    auto applyFn = [this](const QString& ip, const DroneScrewCameraParams& cam) {
        auto cfg = ConfigManager::Instance().GetConfig();
        const bool ipChanged = (ip.toStdString() != cfg.server.serverIp);
        cfg.server.serverIp = ip.toStdString();
        cfg.camera          = cam;
        ConfigManager::Instance().SetConfig(cfg);
        ConfigManager::Instance().Save();
        if (m_pPresenter)
        {
            if (ipChanged) m_pPresenter->ApplyConfig(cfg);   // IP 改变才重建连接
            m_pPresenter->SetServerExposure(cam.exposure);
            m_pPresenter->SetServerGain(cam.gain);
        }
        appendLog(QStringLiteral("已应用相机设置: IP=%1  曝光=%2μs  增益=%3")
                      .arg(ip).arg(cam.exposure).arg(cam.gain));
    };

    // 「应用」：实时下发但不关闭对话框，便于一边看实时图一边调曝光
    connect(&dlg, &DialogCameraSetting::applyRequested, this, applyFn);

    if (dlg.exec() == QDialog::Accepted)
        applyFn(dlg.GetServerIp(), dlg.GetCameraParams());
}

void MainWindow::on_btn_algo_config_clicked()
{
    auto cfg = ConfigManager::Instance().GetConfig();
    DialogAlgoArg dlg(this);

    // 优先使用从 Server 读取的参数，没有则用本地配置
    if (m_cachedServerInfo.ok)
    {
        DroneScrewAlgoUiParams serverParams;
        serverParams.scoreThreshold = m_cachedServerInfo.algoScore;
        serverParams.nmsThreshold   = m_cachedServerInfo.algoNms;
        serverParams.inputWidth     = m_cachedServerInfo.algoWidth;
        serverParams.inputHeight    = m_cachedServerInfo.algoHeight;
        serverParams.modelPath      = m_cachedServerInfo.algoModel;
        serverParams.modelType      = m_cachedServerInfo.algoModelType;
        dlg.SetParams(serverParams);
    }
    else
    {
        dlg.SetParams(cfg.algo);
    }

    if (dlg.exec() == QDialog::Accepted)
    {
        cfg.algo = dlg.GetParams();
        ConfigManager::Instance().SetConfig(cfg);
        ConfigManager::Instance().Save();
        if (m_pPresenter) m_pPresenter->PushAlgoParams(cfg.algo);
        appendLog(QStringLiteral("已应用算法参数"));
    }
}

void MainWindow::on_btn_test_clicked()
{
    // 「测试」按钮 → 单次检测请求
    if (m_pPresenter && m_pPresenter->TriggerSingleDetection())
        appendLog(QStringLiteral("已发送单次检测请求"));
}

// ======================== 页面布局 ========================

int MainWindow::getAvailableHeight()
{
    QScreen* screen = QApplication::primaryScreen();
    if (screen)
    {
        QRect availableGeometry = screen->availableGeometry();
        return availableGeometry.height() - 30;
    }
    return 1050;
}

void MainWindow::adjustLayoutForCameraCount(int cameraCount)
{
    if (cameraCount <= 1)
        setupSingleCameraLayout();
    else
        setupMultiCameraLayout();
}

void MainWindow::setupSingleCameraLayout()
{
    int availableHeight = getAvailableHeight();
    ResultListLayoutHelper::setupSingleCameraMode(
        ui->detect_result_list,
        ui->detect_image, ui->detect_image_2,
        ui->frame_dev, ui->detect_log,
        availableHeight);
    m_deviceStatusWidget->setCameraCount(1);
    appendLog(QStringLiteral("页面布局已调整为单相机模式"));
}

void MainWindow::setupMultiCameraLayout()
{
    int availableHeight = getAvailableHeight();
    ResultListLayoutHelper::setupMultiCameraMode(
        ui->detect_result_list,
        ui->detect_image, ui->detect_image_2,
        ui->frame_dev, ui->detect_log,
        availableHeight);
    m_deviceStatusWidget->setCameraCount(2);
    appendLog(QStringLiteral("页面布局已调整为双相机模式"));
}

// ======================== 事件过滤器 ========================

bool MainWindow::eventFilter(QObject* obj, QEvent* event)
{
    if (obj == m_versionLabel && event->type() == QEvent::MouseButtonPress)
    {
        QString versionStr = m_versionLabel->text();
        AboutDialog dlg(DRONESCREWCTRL_APP_NAME, versionStr, QString(), this);
        dlg.exec();
        return true;
    }
    return QMainWindow::eventFilter(obj, event);
}