#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <math.h>
#include <time.h>
#include <SDL2/SDL.h>
#include <SDL2/SDL_image.h>
#include <SDL2/SDL_ttf.h>
#include <SDL2/SDL_mixer.h>

#include "breakout.h"
#include "vector.h"
#include "startmenu.h"
#include "gamestate.h"
#include "highscores.h"
#include "gameover.h"
#include "settings.h"
#include "background.h"

#define MAIN_MenuMusicPath "assets/sounds/menu_music.wav"
#define MAIN_FadeTime      1000

#include "main.h"

// Default Render Size (Upscaled for bigger monitors)
const int width = 1920;
const int height = 1080;
float XScale = 1.0f, YScale = 1.0f;
// End render properties

int numKeys;
const Uint8 * keystate; // TODO: export all this into scenery and enemy waves
SDL_Window * window;
SDL_Renderer * renderer;
SDL_Event event;
bool running = true, fullscreen = false, LoggedIn = false;
GameState gameState = MainMenu;
Scenery scenery;
Mix_Music * MenuLoop;
char Username[50];
char Password[50];

int main(int argc, char * args[]){
    // AttemptLogin();
    INITIALIZE();
    Uint32 fps_lasttime = SDL_GetTicks(); // the last recorded time.
    Uint32 fps_current; // the current FPS.
    Uint32 fps_frames = 0; // frames passed since the last recorded fps.

    GAME_ChangeState(MainMenu);
    while (running) { // Gameloop
        HandleSDLEvents();
        DrawBackground(renderer);
        switch (gameState) {
            case Game:
                BREAKOUT_Update(&scenery, keystate);
                BACKGROUND_Draw(renderer, 0);
                BREAKOUT_Draw(&scenery, renderer);
                break;
            case MainMenu:
                // Startmenu_Update(keystate);
                Startmenu_Draw(renderer);
                break;
            case Highscores:
                HIGHSCORES_Draw(renderer);
                break;
            case Settings:
                Settings_Draw(renderer, &scenery);
                break;
            case GameOver:
                GAMEOVER_Draw(renderer, &scenery);
                break;
            default:
                printf("Unknow state was updated: %d\n", gameState);
                break;
        } /* switch */
        SDL_RenderPresent(renderer);
        fps_frames++;
        if (fps_lasttime < SDL_GetTicks() - 1000) {
            fps_lasttime = SDL_GetTicks();
            fps_current = fps_frames;
            fps_frames = 0;
            printf("Frames/s: %u\n", fps_current);
        }
    }
    QUIT();
    return 0;
} /* main */

void AttemptLogin(){

}

void GAME_Escape(){
    running = false;
    printf("GAME_Escape was called!\n");
}

void MENU_StartMusic(){
    printf("Attempting to start menu music...\n");
    if (!Mix_PlayingMusic())
        Mix_FadeInMusic(MenuLoop, -1, MAIN_FadeTime);
    else printf("Menu music is already playing!\n");
}

void MENU_PauseMusic(){
    printf("Attempting to pause menu music...\n");
    if (Mix_PlayingMusic())
        Mix_HaltMusic();
    // Mix_FadeOutMusic(MAIN_FadeTime);
    else printf("There is no menu music to be paused!\n");
}

void GAME_ChangeState(GameState state){
    if (state == Game) {
        printf("Game music starting!\n");
        MENU_PauseMusic();
        BREAKOUT_StartMusic();
    } else {
        printf("Menu music starting!\n");
        BREAKOUT_PauseMusic();
        MENU_StartMusic();
    }
    if (gameState == state) {
        printf("State wasn't changed!\n");
        return;
    }
    gameState = state;
    switch (gameState) {
        case Game:
            BALL_ResetPosition(&(scenery.ball));
            break;
        case Highscores:
            HIGHSCORES_ReloadList();
            HIGHSCORES_GenerateTexture(renderer);
            printf("State was changed to Highscores!\n");
            break;
        default:
            printf("State was changed to %d!\n", gameState);
            break;
    }
} /* GAME_ChangeState */

void HandleSDLEvents(){
    while (SDL_PollEvent(&event)) {
        switch (event.type) {
            case SDL_QUIT:
                printf("NOTICE: User manually quit window!\n");
                running = false;
                break;
            case SDL_KEYDOWN:
                // if (event.key.keysym.scancode == SDL_SCANCODE_ESCAPE) running = false;
                // else
                keyPress(event.key);
                break;
            case SDL_MOUSEBUTTONDOWN:
                mousePress(event.button);
                button_clicked(event.button, gameState);
                break;
            case SDL_WINDOWEVENT:
                windowChanged(event.window);
                break;
        }
    }
} /* HandleSDLEvents */

void mousePress(SDL_MouseButtonEvent b){ // Debug prop
    switch (gameState) {
        case GameOver:
            GAMEOVER_MouseClicked(b);
            break;
        default:
            printf("Gamestate currently ignores Mouse press event: %d!\n", gameState);
            break;
    }
    if (b.button == SDL_BUTTON_LEFT) {
        printf("Left mouse pressed at %d, %d\n", b.x, b.y);
    } else if (b.button == SDL_BUTTON_RIGHT) {
        printf("Right mouse pressed...\n");
    } else {
        printf("Unknown mouse button pressed: %d\n", b.button);
    }
}

void keyPress(SDL_KeyboardEvent b){ // Debug prop
    printf("Key pressed: ID is %d\n", b.keysym.scancode);
    if (b.keysym.scancode == SDL_SCANCODE_F11 || b.keysym.scancode == SDL_SCANCODE_5) {
        toggleFullscreen();
    } else {
        switch (gameState) {
            case Game:
                BREAKOUT_KeyPressed(&scenery, &b);
                break;
            default:
                break;
        }
    }
}

void toggleFullscreen(){
    if (fullscreen) {
        SDL_SetWindowFullscreen(window, SDL_WINDOW_FULLSCREEN_DESKTOP);
    } else {
        SDL_SetWindowFullscreen(window, 0);
    }
    fullscreen = !fullscreen;
}

void windowChanged(SDL_WindowEvent b){ // Debug prop
    switch (b.event) {
        case SDL_WINDOWEVENT_SIZE_CHANGED:
            printf("Window was resized to (%d|%d)!\n", event.window.data1, event.window.data2);
            // BREAKOUT_ChangeSize(event.window.data1, event.window.data2);
            XScale = ((double)(event.window.data1) / (double)width);
            YScale = ((double)(event.window.data2) / (double)height);
            SDL_RenderSetScale(renderer, XScale, YScale);
            break;
    }
}

void DrawBackground(SDL_Renderer * renderer){
    SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
    SDL_RenderClear(renderer);
} /* DrawFrame */

void INITIALIZE() {
    printf("Initializing started...\n");
    srand(time(NULL));
    if (SDL_Init(SDL_INIT_EVERYTHING) != 0) printf("SDL could not initialize! Error: %s\n", SDL_GetError());
    else printf("SDL was successfully initialized!\n");
    keystate = SDL_GetKeyboardState(&numKeys);
    if (IMG_Init(IMG_INIT_PNG) != IMG_INIT_PNG) printf("IMG could not initialize! Error: %s\n", IMG_GetError());
    else printf("IMG was successfully initialized!\n");
    if (TTF_Init() == -1) printf("TTF could not initialize! Error: %s\n", TTF_GetError());
    else printf("TTF was successfully initialized!\n");
    if (Mix_OpenAudio(44100, MIX_DEFAULT_FORMAT, 2, 2048) < 0) printf("Mixer could not initialize! Error %s\n", Mix_GetError());
    else printf("Mixer was successfully initialized!\n");

    window = SDL_CreateWindow("BreakING", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, width, height, SDL_WINDOW_OPENGL);
    SDL_SetWindowResizable(window, true);
    SDL_SetWindowFullscreen(window, SDL_WINDOW_FULLSCREEN_DESKTOP);
    printf("Window was created!\n");
    renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
    printf("Renderer was created!\n");
    BREAKOUT_INITIALIZE(renderer);
    scenery = BREAKOUT_CreateDefault();
    Load_Textures(renderer);
    HIGHSCORES_Initialize();
    BACKGROUND_Initialize(renderer, width, height);
    Settings_Initialize(renderer, &scenery);
    GAMEOVER_Initialize(renderer);
    MenuLoop = Mix_LoadMUS(MAIN_MenuMusicPath);
    printf("Initializing finished!\n");
} /* INITIALIZE */

void QUIT(){
    printf("De-initializing started...\n");
    Mix_FreeMusic(MenuLoop);
    GAMEOVER_Deinitialize();
    BACKGROUND_Deinitialize();
    Settings_Deinitialize();
    HIGHSCORES_Deinitialize();
    BREAKOUT_DestroyObject(&scenery);
    BREAKOUT_DEINITIALIZE();
    Mix_CloseAudio();
    TTF_Quit();
    IMG_Quit();
    printf("Quitting SDL_IMG finished!\n");
    SDL_DestroyRenderer(renderer);
    printf("De-initializing renderer finished!\n");
    SDL_DestroyWindow(window);
    printf("De-initializing window finished!\n");
    SDL_Quit();
    printf("Quitting SDL finished!\n");
    printf("De-initializing finished!\n");
} /* QUIT */