#include "pch.h"
#include "MainWindow.xaml.h"
#include "MainVideoPage.xaml.h"
#include "MultiVideoPage.xaml.h"
#include "LayeredVideoPage.xaml.h"
#include "SettingsPage.xaml.h"
#include "src/Logger/LogManager.h"
#include <microsoft.ui.xaml.window.h>
#include <dwmapi.h>
#pragma comment(lib, "dwmapi.lib")
#if __has_include("MainWindow.g.cpp")
#include "MainWindow.g.cpp"
#endif

using namespace winrt;
using namespace winrt::Microsoft::UI::Xaml;
using namespace winrt::Microsoft::UI::Xaml::Controls;
using namespace winrt::Windows::UI::Xaml::Interop;

namespace winrt::Vav2Player::implementation
{
    MainWindow::MainWindow()
    {
        InitializeComponent();

        // Apply dark mode to title bar using DWM API
        try {
            auto windowNative = this->try_as<::IWindowNative>();
            if (windowNative) {
                HWND hWnd = nullptr;
                windowNative->get_WindowHandle(&hWnd);

                if (hWnd) {
                    BOOL isDarkMode = TRUE;
                    ::DwmSetWindowAttribute(
                        hWnd,
                        DWMWA_USE_IMMERSIVE_DARK_MODE,
                        &isDarkMode,
                        sizeof(isDarkMode)
                    );
                }
            }
        } catch (...) {
            // Ignore title bar dark mode errors - non-critical
        }

        // Initialize LogManager with default outputs (Console + Debug) FIRST
        ::Vav2Player::LogManager::GetInstance().InitializeDefaultOutputs();
        ::Vav2Player::LogManager::GetInstance().SetLogLevel(::Vav2Player::LogLevel::Info);

        // Initialize log panel after LogManager is ready
        m_logPanel = LogPanel();

        // Set LogMessagePage as global instance for backward compatibility
        // This enables Observer pattern - LogMessagePage will automatically receive updates from LogManager
        auto logPageImpl = winrt::get_self<winrt::Vav2Player::implementation::LogMessagePage>(m_logPanel);
        winrt::Vav2Player::implementation::LogMessagePage::SetInstance(std::shared_ptr<winrt::Vav2Player::implementation::LogMessagePage>(logPageImpl, [](auto*) {}));

        // Initially show log panel
        ShowLogToggle().IsChecked(true);

        // Load Multi Video as default page (start screen)
        TypeName pageTypeName;
        pageTypeName.Name = winrt::name_of<Vav2Player::MultiVideoPage>();
        pageTypeName.Kind = TypeKind::Metadata;
        ContentFrame().Navigate(pageTypeName);

        // Add welcome message to log - this will now be received by LogMessagePage via Observer pattern
        ::Vav2Player::LogManager::GetInstance().LogInfo(L"Vav2Player started successfully", L"MainWindow");
    }

    // Navigation event handlers
    void MainWindow::SwitchToMainView_Click(winrt::Windows::Foundation::IInspectable const&, winrt::Microsoft::UI::Xaml::RoutedEventArgs const&)
    {
        TypeName pageTypeName;
        pageTypeName.Name = winrt::name_of<Vav2Player::MainVideoPage>();
        pageTypeName.Kind = TypeKind::Metadata;
        ContentFrame().Navigate(pageTypeName);
    }

    void MainWindow::SwitchToMultiVideoView_Click(winrt::Windows::Foundation::IInspectable const&, winrt::Microsoft::UI::Xaml::RoutedEventArgs const&)
    {
        TypeName pageTypeName;
        pageTypeName.Name = winrt::name_of<Vav2Player::MultiVideoPage>();
        pageTypeName.Kind = TypeKind::Metadata;
        ContentFrame().Navigate(pageTypeName);
    }

    void MainWindow::SwitchToLayeredVideoView_Click(winrt::Windows::Foundation::IInspectable const&, winrt::Microsoft::UI::Xaml::RoutedEventArgs const&)
    {
        TypeName pageTypeName;
        pageTypeName.Name = winrt::name_of<Vav2Player::LayeredVideoPage>();
        pageTypeName.Kind = TypeKind::Metadata;
        ContentFrame().Navigate(pageTypeName);
    }

    void MainWindow::Exit_Click(winrt::Windows::Foundation::IInspectable const&, winrt::Microsoft::UI::Xaml::RoutedEventArgs const&)
    {
        this->Close();
    }


    void MainWindow::Settings_Click(winrt::Windows::Foundation::IInspectable const&, winrt::Microsoft::UI::Xaml::RoutedEventArgs const&)
    {
        TypeName pageTypeName;
        pageTypeName.Name = winrt::name_of<Vav2Player::SettingsPage>();
        pageTypeName.Kind = TypeKind::Metadata;
        ContentFrame().Navigate(pageTypeName);
    }

    void MainWindow::About_Click(winrt::Windows::Foundation::IInspectable const&, winrt::Microsoft::UI::Xaml::RoutedEventArgs const&)
    {
        // Could implement About dialog
        // For now, just log the request
        ::Vav2Player::LogManager::GetInstance().LogInfo(L"About dialog requested", L"MainWindow");
    }

    void MainWindow::ShowLogToggle_Click(winrt::Windows::Foundation::IInspectable const& sender, winrt::Microsoft::UI::Xaml::RoutedEventArgs const&)
    {
        if (auto toggleButton = sender.try_as<Controls::AppBarToggleButton>())
        {
            bool isChecked = toggleButton.IsChecked().GetBoolean();

            if (isChecked)
            {
                // Show log panel with default width
                LogPanelColumn().Width(GridLength(400));
                LogPanelBorder().Visibility(Visibility::Visible);
            }
            else
            {
                // Hide log panel
                LogPanelColumn().Width(GridLength(0));
                LogPanelBorder().Visibility(Visibility::Collapsed);
            }

            // Log panel visibility toggled - no need to log this
        }
    }

    // Drag-based splitter implementation
    void MainWindow::Splitter_PointerPressed(winrt::Windows::Foundation::IInspectable const&, winrt::Microsoft::UI::Xaml::Input::PointerRoutedEventArgs const& e)
    {
        // Capture pointer first to ensure we receive subsequent events
        if (auto border = SplitterBorder())
        {
            border.CapturePointer(e.Pointer());
            border.Background(Microsoft::UI::Xaml::Media::SolidColorBrush(Microsoft::UI::Colors::CornflowerBlue()));
        }

        // Set drag state after capturing pointer
        m_isDraggingSplitter = true;

        // Store initial panel width
        m_initialPanelWidth = LogPanelColumn().Width().Value;

        // Store initial screen mouse position using Windows API
        POINT screenPoint;
        GetCursorPos(&screenPoint);
        m_lastMouseX = static_cast<double>(screenPoint.x);

        // Mark event as handled to prevent bubbling
        e.Handled(true);

        // Splitter drag started - no need to log drag events
    }

    void MainWindow::Splitter_PointerMoved(winrt::Windows::Foundation::IInspectable const&, winrt::Microsoft::UI::Xaml::Input::PointerRoutedEventArgs const& e)
    {
        if (!m_isDraggingSplitter)
            return;

        // Get current screen mouse position using Windows API
        POINT currentScreenPoint;
        GetCursorPos(&currentScreenPoint);
        double currentMouseX = static_cast<double>(currentScreenPoint.x);

        // Calculate relative mouse movement delta
        double deltaX = currentMouseX - m_lastMouseX;
        m_lastMouseX = currentMouseX;

        // Get current panel width and apply delta
        auto currentWidth = LogPanelColumn().Width().Value;
        double newWidth = currentWidth + deltaX;

        // Set only minimum limit (no maximum limit)
        const double MIN_WIDTH = 200.0;
        newWidth = std::max(MIN_WIDTH, newWidth);

        // Update panel width immediately for natural dragging
        LogPanelColumn().Width(GridLength(newWidth));

        // Mark event as handled
        e.Handled(true);
    }

    void MainWindow::Splitter_PointerReleased(winrt::Windows::Foundation::IInspectable const&, winrt::Microsoft::UI::Xaml::Input::PointerRoutedEventArgs const& e)
    {
        if (m_isDraggingSplitter)
        {
            m_isDraggingSplitter = false;

            // Release pointer capture
            if (auto border = SplitterBorder())
            {
                border.ReleasePointerCapture(e.Pointer());
                border.Background(Microsoft::UI::Xaml::Media::SolidColorBrush(
                    Microsoft::UI::ColorHelper::FromArgb(255, 102, 102, 102))); // Dark gray for splitter
            }

            // Splitter drag completed - no need to log resize events

            // Mark event as handled
            e.Handled(true);
        }
    }

    void MainWindow::Splitter_PointerEntered(winrt::Windows::Foundation::IInspectable const&, winrt::Microsoft::UI::Xaml::Input::PointerRoutedEventArgs const&)
    {
        // Highlight on hover
        if (auto border = SplitterBorder())
        {
            border.Background(Microsoft::UI::Xaml::Media::SolidColorBrush(Microsoft::UI::Colors::LightGray()));
        }
    }

    void MainWindow::Splitter_PointerExited(winrt::Windows::Foundation::IInspectable const&, winrt::Microsoft::UI::Xaml::Input::PointerRoutedEventArgs const&)
    {
        // Reset to default color
        if (auto border = SplitterBorder())
        {
            border.Background(Microsoft::UI::Xaml::Media::SolidColorBrush(
                Microsoft::UI::ColorHelper::FromArgb(255, 80, 80, 80))); // Darker gray for default splitter
        }
    }

    // Helper methods moved to MainVideoPage
    void MainWindow::ConvertYUVToBGRA(const VavCoreVideoFrame& yuv_frame, uint8_t* bgra_buffer, uint32_t width, uint32_t height)
    {
        // Implementation moved to MainVideoPage
    }

    void MainWindow::RenderFrameToScreen(const VavCoreVideoFrame& frame, winrt::Microsoft::UI::Xaml::Media::Imaging::WriteableBitmap& bitmap, std::vector<uint8_t>& bgra_buffer)
    {
        // Implementation moved to MainVideoPage
    }
}