/****************************************************************************
 Copyright (c) 2022 Xiamen Yaji Software Co., Ltd.

 http://www.cocos.com

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated engine source code (the "Software"), a limited,
 worldwide, royalty-free, non-assignable, revocable and non-exclusive license
 to use Cocos Creator solely to develop games on your target platforms. You shall
 not use Cocos Creator software for developing other software or tools that's
 used for developing games. You are not granted to publish, distribute,
 sublicense, and/or sell copies of Cocos Creator.

 The software or tools in this License Agreement are licensed, not sold.
 Xiamen Yaji Software Co., Ltd. reserves all rights not expressly granted to you.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
****************************************************************************/

#include "platform/SDLHelper.h"
#include "SDL2/SDL.h"
#include "SDL2/SDL_main.h"
#include "SDL2/SDL_syswm.h"
#include "base/Log.h"
#include "platform/IEventDispatch.h"
#include "platform/interfaces/modules/ISystemWindow.h"

namespace {
std::unordered_map<int, cc::KeyCode> gKeyMap = {
    {SDLK_APPLICATION, cc::KeyCode::CONTEXT_MENU},
    {SDLK_SCROLLLOCK, cc::KeyCode::SCROLLLOCK},
    {SDLK_PAUSE, cc::KeyCode::PAUSE},
    {SDLK_PRINTSCREEN, cc::KeyCode::PRINT_SCREEN},
    {SDLK_INSERT, cc::KeyCode::INSERT},
    {SDLK_ESCAPE, cc::KeyCode::ESCAPE},
    {SDLK_MINUS, cc::KeyCode::MINUS},
    {SDLK_LSHIFT, cc::KeyCode::SHIFT_LEFT},
    {SDLK_RSHIFT, cc::KeyCode::SHIFT_RIGHT},
    {SDLK_EQUALS, cc::KeyCode::EQUAL},
    {SDLK_BACKSLASH, cc::KeyCode::BACKSLASH},
    {SDLK_BACKQUOTE, cc::KeyCode::BACKQUOTE},
    {SDLK_BACKSPACE, cc::KeyCode::BACKSPACE},
    {SDLK_RETURN, cc::KeyCode::ENTER},
    {SDLK_RETURN2, cc::KeyCode::ENTER},
    {SDLK_LEFTBRACKET, cc::KeyCode::BRACKET_LEFT},
    {SDLK_RIGHTBRACKET, cc::KeyCode::BRACKET_RIGHT},
    {SDLK_SEMICOLON, cc::KeyCode::SEMICOLON},
    {SDLK_QUOTE, cc::KeyCode::QUOTE},
    {SDLK_TAB, cc::KeyCode::TAB},
    {SDLK_LCTRL, cc::KeyCode::CONTROL_LEFT},
    {SDLK_RCTRL, cc::KeyCode::CONTROL_RIGHT},
    {SDLK_LALT, cc::KeyCode::ALT_LEFT},
    {SDLK_RALT, cc::KeyCode::ALT_RIGHT},
    {SDLK_LEFT, cc::KeyCode::ARROW_LEFT},
    {SDLK_RIGHT, cc::KeyCode::ARROW_RIGHT},
    {SDLK_UP, cc::KeyCode::ARROW_UP},
    {SDLK_DOWN, cc::KeyCode::ARROW_DOWN},
    {SDLK_KP_ENTER, cc::KeyCode::NUMPAD_ENTER},
    {SDLK_KP_PLUS, cc::KeyCode::NUMPAD_PLUS},
    {SDLK_KP_MULTIPLY, cc::KeyCode::NUMPAD_MULTIPLY},
    {SDLK_KP_DIVIDE, cc::KeyCode::NUMPAD_DIVIDE},
    {SDLK_KP_MINUS, cc::KeyCode::NUMPAD_MINUS},
    {SDLK_KP_PERIOD, cc::KeyCode::NUMPAD_DECIMAL},
    {SDLK_KP_BACKSPACE, cc::KeyCode::BACKSPACE},
    {SDLK_NUMLOCKCLEAR, cc::KeyCode::NUM_LOCK},
    {SDLK_HOME, cc::KeyCode::HOME},
    {SDLK_PAGEUP, cc::KeyCode::PAGE_UP},
    {SDLK_PAGEDOWN, cc::KeyCode::PAGE_DOWN},
    {SDLK_END, cc::KeyCode::END},
    {SDLK_COMMA, cc::KeyCode::COMMA},
    {SDLK_PERIOD, cc::KeyCode::PERIOD},
    {SDLK_SLASH, cc::KeyCode::SLASH},
    {SDLK_SPACE, cc::KeyCode::SPACE},
    {SDLK_DELETE, cc::KeyCode::DELETE_KEY},
    {SDLK_CAPSLOCK, cc::KeyCode::CAPS_LOCK},
    {SDLK_KP_0, cc::KeyCode::NUMPAD_0},
    {SDLK_KP_1, cc::KeyCode::NUMPAD_1},
    {SDLK_KP_2, cc::KeyCode::NUMPAD_2},
    {SDLK_KP_3, cc::KeyCode::NUMPAD_3},
    {SDLK_KP_4, cc::KeyCode::NUMPAD_4},
    {SDLK_KP_5, cc::KeyCode::NUMPAD_5},
    {SDLK_KP_6, cc::KeyCode::NUMPAD_6},
    {SDLK_KP_7, cc::KeyCode::NUMPAD_7},
    {SDLK_KP_8, cc::KeyCode::NUMPAD_8},
    {SDLK_KP_9, cc::KeyCode::NUMPAD_9}};

int sdlKeycodeToCocosCode(int sdlCode, int mode) {
    auto it = gKeyMap.find(sdlCode);
    if (it != gKeyMap.end()) {
        return static_cast<int>(it->second);
    }

    if (sdlCode >= SDLK_F1 && sdlCode <= SDLK_F12) {
        // F1 ~ F12
        return 112 + (sdlCode - SDLK_F1);
    } else {
        int code = sdlCode & (~(1 << 30));
        if (code >= SDLK_a && code <= SDLK_z) {
            return 'A' + (code - SDLK_a);
        } else {
            return code;
        }
    }
}

std::unordered_map<cc::ISystemWindow::WindowFlags, SDL_WindowFlags> gWindowFlagMap = {
    {cc::ISystemWindow::CC_WINDOW_FULLSCREEN, SDL_WINDOW_FULLSCREEN},
    {cc::ISystemWindow::CC_WINDOW_OPENGL, SDL_WINDOW_OPENGL},
    {cc::ISystemWindow::CC_WINDOW_SHOWN, SDL_WINDOW_SHOWN},
    {cc::ISystemWindow::CC_WINDOW_HIDDEN, SDL_WINDOW_HIDDEN},
    {cc::ISystemWindow::CC_WINDOW_BORDERLESS, SDL_WINDOW_BORDERLESS},
    {cc::ISystemWindow::CC_WINDOW_RESIZABLE, SDL_WINDOW_RESIZABLE},
    {cc::ISystemWindow::CC_WINDOW_MINIMIZED, SDL_WINDOW_MINIMIZED},
    {cc::ISystemWindow::CC_WINDOW_MAXIMIZED, SDL_WINDOW_MAXIMIZED},
    {cc::ISystemWindow::CC_WINDOW_INPUT_GRABBED, SDL_WINDOW_INPUT_GRABBED},
    {cc::ISystemWindow::CC_WINDOW_INPUT_FOCUS, SDL_WINDOW_INPUT_FOCUS},
    {cc::ISystemWindow::CC_WINDOW_MOUSE_FOCUS, SDL_WINDOW_MOUSE_FOCUS},
    {cc::ISystemWindow::CC_WINDOW_FULLSCREEN_DESKTOP, SDL_WINDOW_FULLSCREEN_DESKTOP},
    {cc::ISystemWindow::CC_WINDOW_FOREIGN, SDL_WINDOW_FOREIGN},
    {cc::ISystemWindow::CC_WINDOW_ALLOW_HIGHDPI, SDL_WINDOW_ALLOW_HIGHDPI},
    {cc::ISystemWindow::CC_WINDOW_MOUSE_CAPTURE, SDL_WINDOW_MOUSE_CAPTURE},
    {cc::ISystemWindow::CC_WINDOW_ALWAYS_ON_TOP, SDL_WINDOW_ALWAYS_ON_TOP},
    {cc::ISystemWindow::CC_WINDOW_SKIP_TASKBAR, SDL_WINDOW_SKIP_TASKBAR},
    {cc::ISystemWindow::CC_WINDOW_UTILITY, SDL_WINDOW_UTILITY},
    {cc::ISystemWindow::CC_WINDOW_TOOLTIP, SDL_WINDOW_TOOLTIP},
    {cc::ISystemWindow::CC_WINDOW_POPUP_MENU, SDL_WINDOW_POPUP_MENU},
    {cc::ISystemWindow::CC_WINDOW_VULKAN, SDL_WINDOW_VULKAN}};

int windowFlagsToSDLWindowFlag(int flags) {
    int sdlFlags = 0;
    for (auto it : gWindowFlagMap) {
        if ((it.first & flags) == it.first) {
            sdlFlags |= it.second;
        }
    }
    return sdlFlags;
}
} // namespace

namespace cc {
SDLHelper::SDLHelper(IEventDispatch *delegate)
: _delegate(delegate) {
}

SDLHelper::~SDLHelper() {
    if (_handle) {
        SDL_DestroyWindow(_handle);
        _handle = nullptr;
    }
    if (_isWindowCreated) {
        SDL_Quit();
    }
}

int SDLHelper::init() {
    if (SDL_Init(SDL_INIT_VIDEO) < 0) {
        // Display error message
        CC_LOG_ERROR("SDL could not initialize! SDL_Error: %s\n", SDL_GetError());
        return -1;
    }
    return 0;
}
void SDLHelper::dispatchWindowEvent(const SDL_WindowEvent &wevent) {
    WindowEvent ev;
    switch (wevent.event) {
        case SDL_WINDOWEVENT_SHOWN: {
            ev.type = WindowEvent::Type::SHOW;
            _delegate->dispatchEvent(ev);
            break;
        }
        case SDL_WINDOWEVENT_RESTORED: {
            ev.type = WindowEvent::Type::RESTORED;
            _delegate->dispatchEvent(ev);
            break;
        }
        case SDL_WINDOWEVENT_SIZE_CHANGED: {
            ev.type   = WindowEvent::Type::SIZE_CHANGED;
            ev.width  = wevent.data1;
            ev.height = wevent.data2;
            _delegate->dispatchEvent(ev);
            break;
        }
        case SDL_WINDOWEVENT_RESIZED: {
            ev.type   = WindowEvent::Type::RESIZED;
            ev.width  = wevent.data1;
            ev.height = wevent.data2;
            _delegate->dispatchEvent(ev);
            break;
        }
        case SDL_WINDOWEVENT_HIDDEN: {
            ev.type = WindowEvent::Type::HIDDEN;
            _delegate->dispatchEvent(ev);
            break;
        }
        case SDL_WINDOWEVENT_MINIMIZED: {
            ev.type = WindowEvent::Type::MINIMIZED;
            _delegate->dispatchEvent(ev);
            break;
        }
        case SDL_WINDOWEVENT_ENTER: {
            SDL_CaptureMouse(SDL_TRUE);
            break;
        }
        case SDL_WINDOWEVENT_CLOSE: {
            ev.type = WindowEvent::Type::CLOSE;
            _delegate->dispatchEvent(ev);
            break;
        }
    }
}

void SDLHelper::dispatchSDLEvent(const SDL_Event &sdlEvent, bool *quit) {
    cc::TouchEvent    touch;
    cc::MouseEvent    mouse;
    cc::KeyboardEvent keyboard;
    switch (sdlEvent.type) {
        case SDL_QUIT: {
            if (quit) {
                *quit = true;
            }
            WindowEvent ev;
            ev.type = WindowEvent::Type::QUIT;
            _delegate->dispatchEvent(ev);
            break;
        }
        case SDL_WINDOWEVENT: {
            dispatchWindowEvent(sdlEvent.window);
            break;
        }
        case SDL_MOUSEBUTTONDOWN: {
            int width  = 0;
            int height = 0;
            SDL_GetWindowSize(_handle, &width, &height);
            const SDL_MouseButtonEvent &event = sdlEvent.button;
            if (0 > event.x || event.x > width || 0 > event.y || event.y > height) {
                break;
            }
            mouse.type   = MouseEvent::Type::DOWN;
            mouse.x      = static_cast<float>(event.x);
            mouse.y      = static_cast<float>(event.y);
            mouse.button = event.button - 1;
            _delegate->dispatchEvent(mouse);
            break;
        }
        case SDL_MOUSEBUTTONUP: {
            const SDL_MouseButtonEvent &event = sdlEvent.button;
            mouse.type                        = MouseEvent::Type::UP;
            mouse.x                           = static_cast<float>(event.x);
            mouse.y                           = static_cast<float>(event.y);
            mouse.button                      = event.button - 1;
            _delegate->dispatchEvent(mouse);
            break;
        }
        case SDL_MOUSEMOTION: {
            const SDL_MouseMotionEvent &event = sdlEvent.motion;
            mouse.type                        = MouseEvent::Type::MOVE;
            mouse.x                           = static_cast<float>(event.x);
            mouse.y                           = static_cast<float>(event.y);
            mouse.button                      = 0;
            _delegate->dispatchEvent(mouse);
            break;
        }
        case SDL_MOUSEWHEEL: {
            const SDL_MouseWheelEvent &event = sdlEvent.wheel;
            mouse.type                       = MouseEvent::Type::WHEEL;
            mouse.x                          = static_cast<float>(event.x);
            mouse.y                          = static_cast<float>(event.y);
            mouse.button                     = 0; //TODO: direction
            _delegate->dispatchEvent(mouse);
            break;
        }
        case SDL_FINGERUP: {
            const SDL_TouchFingerEvent &event = sdlEvent.tfinger;
            touch.type                        = TouchEvent::Type::ENDED;
            touch.touches                     = {TouchInfo(event.x, event.y, (int)event.fingerId)};
            _delegate->dispatchTouchEvent(touch);
            break;
        }
        case SDL_FINGERDOWN: {
            const SDL_TouchFingerEvent &event = sdlEvent.tfinger;
            touch.type                        = TouchEvent::Type::BEGAN;
            touch.touches                     = {TouchInfo(event.x, event.y, (int)event.fingerId)};
            _delegate->dispatchTouchEvent(touch);
            break;
        }
        case SDL_FINGERMOTION: {
            const SDL_TouchFingerEvent &event = sdlEvent.tfinger;
            touch.type                        = TouchEvent::Type::MOVED;
            touch.touches                     = {TouchInfo(event.x, event.y, (int)event.fingerId)};
            _delegate->dispatchTouchEvent(touch);
            break;
        }
        case SDL_KEYDOWN: {
            const SDL_KeyboardEvent &event = sdlEvent.key;
            auto                     mode  = event.keysym.mod;
            keyboard.action                = KeyboardEvent::Action::PRESS;
            keyboard.key                   = sdlKeycodeToCocosCode(event.keysym.sym, mode);
            keyboard.altKeyActive          = mode & KMOD_ALT;
            keyboard.ctrlKeyActive         = mode & KMOD_CTRL;
            keyboard.shiftKeyActive        = mode & KMOD_SHIFT;
            //CC_LOG_DEBUG("==> key %d -> code %d", event.keysym.sym, keyboard.key);
            _delegate->dispatchEvent(keyboard);
            break;
        }
        case SDL_KEYUP: {
            const SDL_KeyboardEvent &event = sdlEvent.key;
            auto                     mode  = event.keysym.mod;
            keyboard.action                = KeyboardEvent::Action::RELEASE;
            keyboard.key                   = sdlKeycodeToCocosCode(event.keysym.sym, mode);
            keyboard.altKeyActive          = mode & KMOD_ALT;
            keyboard.ctrlKeyActive         = mode & KMOD_CTRL;
            keyboard.shiftKeyActive        = mode & KMOD_SHIFT;
            _delegate->dispatchEvent(keyboard);
            break;
        }
        default:
            break;
    }
}

void SDLHelper::pollEvent(bool *quit) {
    SDL_Event sdlEvent;
    int       cnt = 0;
    while ((cnt = SDL_PollEvent(&sdlEvent)) != 0) {
        dispatchSDLEvent(sdlEvent, quit);
    }
}

bool SDLHelper::createWindow(const char *title,
                             int w, int h, int flags) {
    if (_isWindowCreated) {
        return true;
    }
    SDL_Rect screenRect;
    if (SDL_GetDisplayUsableBounds(0, &screenRect) != 0) {
        return false;
    }
    int x = screenRect.x;
    int y = screenRect.y + screenRect.h - h;
    return createWindow(title, x, y, w, h, flags);
}

bool SDLHelper::createWindow(const char *title,
                             int x, int y, int w,
                             int h, int flags) {
    if (_isWindowCreated) {
        return true;
    }
    // Create window
    int sdlFlags = windowFlagsToSDLWindowFlag(flags);
    _handle      = SDL_CreateWindow(title, x, y, w, h, sdlFlags);
    if (_handle == nullptr) {
        // Display error message
        CC_LOG_ERROR("Window could not be created! SDL_Error: %s\n", SDL_GetError());
        return false;
    }
    _isWindowCreated = true;
    return true;
}

void SDLHelper::setCursorEnabled(bool value) {
    SDL_SetRelativeMouseMode(value ? SDL_FALSE : SDL_TRUE);
}

void SDLHelper::swapWindow() {
    SDL_GL_SwapWindow(_handle);
}

#if (CC_PLATFORM == CC_PLATFORM_LINUX)
uintptr_t SDLHelper::getDisplay() const {
    SDL_SysWMinfo wmInfo;
    SDL_VERSION(&wmInfo.version);
    SDL_GetWindowWMInfo(_handle, &wmInfo);
    return reinterpret_cast<uintptr_t>(wmInfo.info.x11.display);
}
#endif

uintptr_t SDLHelper::getWindowHandler() const {
    SDL_SysWMinfo wmInfo;
    SDL_VERSION(&wmInfo.version);
    SDL_GetWindowWMInfo(_handle, &wmInfo);

#if CC_PLATFORM == CC_PLATFORM_WINDOWS
    return reinterpret_cast<uintptr_t>(wmInfo.info.win.window);
#elif (CC_PLATFORM == CC_PLATFORM_LINUX)
    return reinterpret_cast<uintptr_t>(wmInfo.info.x11.window);
#endif
    CCASSERT(false, "Only valid in windows, linux");
    return 0;
}

} // namespace cc