// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.

#include "pch.h"
#include "BaseWindow.h"
#include <winrt/TerminalApp.h>
#include "../../cascadia/inc/cppwinrt_utils.h"

void SetWindowLongWHelper(const HWND hWnd, const int nIndex, const LONG dwNewLong) noexcept;

struct SystemMenuItemInfo
{
    winrt::hstring label;
    winrt::delegate<void()> callback;
};

class IslandWindow :
    public BaseWindow<IslandWindow>
{
public:
    IslandWindow() noexcept;
    virtual ~IslandWindow() override;

    virtual void MakeWindow() noexcept;
    void Close();
    virtual void OnSize(const UINT width, const UINT height);

    [[nodiscard]] virtual LRESULT MessageHandler(UINT const message, WPARAM const wparam, LPARAM const lparam) noexcept override;
    void OnResize(const UINT width, const UINT height) override;
    void OnMinimize() override;
    void OnRestore() override;
    virtual void OnAppInitialized();
    virtual void SetContent(winrt::Windows::UI::Xaml::UIElement content);
    virtual void OnApplicationThemeChanged(const winrt::Windows::UI::Xaml::ElementTheme& requestedTheme);
    virtual RECT GetNonClientFrame(const UINT dpi) const noexcept;
    virtual SIZE GetTotalNonClientExclusiveSize(const UINT dpi) const noexcept;

    virtual void Initialize();

    void SetCreateCallback(std::function<void(const HWND, const RECT, winrt::Microsoft::Terminal::Settings::Model::LaunchMode& launchMode)> pfn) noexcept;
    void SetSnapDimensionCallback(std::function<float(bool widthOrHeight, float dimension)> pfn) noexcept;

    void FocusModeChanged(const bool focusMode);
    void FullscreenChanged(const bool fullscreen);
    void SetAlwaysOnTop(const bool alwaysOnTop);

    void FlashTaskbar();
    void SetTaskbarProgress(const size_t state, const size_t progress);

    void UnregisterHotKey(const int index) noexcept;
    bool RegisterHotKey(const int index, const winrt::Microsoft::Terminal::Control::KeyChord& hotkey) noexcept;

    winrt::fire_and_forget SummonWindow(winrt::Microsoft::Terminal::Remoting::SummonWindowBehavior args);

    bool IsQuakeWindow() const noexcept;
    void IsQuakeWindow(bool isQuakeWindow) noexcept;

    void HideWindow();

    void SetMinimizeToNotificationAreaBehavior(bool MinimizeToNotificationArea) noexcept;

    void OpenSystemMenu(const std::optional<int> mouseX, const std::optional<int> mouseY) const noexcept;
    void AddToSystemMenu(const winrt::hstring& itemLabel, winrt::delegate<void()> callback);
    void RemoveFromSystemMenu(const winrt::hstring& itemLabel);

    DECLARE_EVENT(DragRegionClicked, _DragRegionClickedHandlers, winrt::delegate<>);
    DECLARE_EVENT(WindowCloseButtonClicked, _windowCloseButtonClickedHandler, winrt::delegate<>);
    WINRT_CALLBACK(MouseScrolled, winrt::delegate<void(til::point, int32_t)>);
    WINRT_CALLBACK(WindowActivated, winrt::delegate<void()>);
    WINRT_CALLBACK(HotkeyPressed, winrt::delegate<void(long)>);
    WINRT_CALLBACK(NotifyNotificationIconPressed, winrt::delegate<void()>);
    WINRT_CALLBACK(NotifyWindowHidden, winrt::delegate<void()>);
    WINRT_CALLBACK(NotifyShowNotificationIconContextMenu, winrt::delegate<void(til::point)>);
    WINRT_CALLBACK(NotifyNotificationIconMenuItemSelected, winrt::delegate<void(HMENU, UINT)>);
    WINRT_CALLBACK(NotifyReAddNotificationIcon, winrt::delegate<void()>);

    WINRT_CALLBACK(WindowMoved, winrt::delegate<void()>);

protected:
    void ForceResize()
    {
        // Do a quick resize to force the island to paint
        const auto size = GetPhysicalSize();
        OnSize(size.cx, size.cy);
    }

    HWND _interopWindowHandle;

    winrt::Windows::UI::Xaml::Hosting::DesktopWindowXamlSource _source;
    winrt::Windows::UI::Xaml::Controls::Grid _rootGrid;
    wil::com_ptr<ITaskbarList3> _taskbar;

    std::function<void(const HWND, const RECT, winrt::Microsoft::Terminal::Settings::Model::LaunchMode& launchMode)> _pfnCreateCallback;
    std::function<float(bool, float)> _pfnSnapDimensionCallback;

    void _HandleCreateWindow(const WPARAM wParam, const LPARAM lParam) noexcept;
    [[nodiscard]] LRESULT _OnSizing(const WPARAM wParam, const LPARAM lParam);
    [[nodiscard]] LRESULT _OnMoving(const WPARAM wParam, const LPARAM lParam);

    bool _borderless{ false };
    bool _alwaysOnTop{ false };
    bool _fullscreen{ false };
    bool _fWasMaximizedBeforeFullscreen{ false };
    RECT _rcWindowBeforeFullscreen{};
    RECT _rcWorkBeforeFullscreen{};
    UINT _dpiBeforeFullscreen{ 96 };

    virtual void _SetIsBorderless(const bool borderlessEnabled);
    virtual void _SetIsFullscreen(const bool fullscreenEnabled);
    void _RestoreFullscreenPosition(const RECT rcWork);
    void _SetFullscreenPosition(const RECT rcMonitor, const RECT rcWork);

    LONG _getDesiredWindowStyle() const;

    void _OnGetMinMaxInfo(const WPARAM wParam, const LPARAM lParam);
    long _calculateTotalSize(const bool isWidth, const long clientSize, const long nonClientSize);

    void _globalActivateWindow(const uint32_t dropdownDuration,
                               const winrt::Microsoft::Terminal::Remoting::MonitorBehavior toMonitor);
    void _dropdownWindow(const uint32_t dropdownDuration,
                         const winrt::Microsoft::Terminal::Remoting::MonitorBehavior toMonitor);
    void _slideUpWindow(const uint32_t dropdownDuration);
    void _doSlideAnimation(const uint32_t dropdownDuration, const bool down);
    void _globalDismissWindow(const uint32_t dropdownDuration);

    static MONITORINFO _getMonitorForCursor();
    static MONITORINFO _getMonitorForWindow(HWND foregroundWindow);
    void _moveToMonitor(HWND foregroundWindow, const winrt::Microsoft::Terminal::Remoting::MonitorBehavior toMonitor);
    void _moveToMonitorOfMouse();
    void _moveToMonitorOf(HWND foregroundWindow);
    void _moveToMonitor(const MONITORINFO activeMonitor);

    bool _isQuakeWindow{ false };

    void _enterQuakeMode();
    til::rectangle _getQuakeModeSize(HMONITOR hmon);

    void _summonWindowRoutineBody(winrt::Microsoft::Terminal::Remoting::SummonWindowBehavior args);

    bool _minimizeToNotificationArea{ false };

    std::unordered_map<UINT, SystemMenuItemInfo> _systemMenuItems;
    UINT _systemMenuNextItemId;

private:
    // This minimum width allows for width the tabs fit
    static constexpr long minimumWidth = 460L;

    // We run with no height requirement for client area,
    // though the total height will take into account the non-client area
    // and the requirements of components hosted in the client area
    static constexpr long minimumHeight = 0L;
};