/*Troy Rosin*/

#include <main.h>
#include <game.h>
#include <input.h>
#include <overworld.h>
#include <host.h>
#include <options.h>

#include <mydebug.h>
#include <SDL2/SDL.h>
#include <SDL2/SDL_image.h>
#include <SDL_ttf.h>

#define SPACING 20

void render_mainmenu();
void init_mainmenu();

SDL_Point mouse_pos;
SDL_Window* window;
SDL_Renderer* renderer;
SDL_Event event;
SDL_Color white = {255,255,255,0};

struct mainmenu_ctx {
  TTF_Font* font;
  SDL_Texture* background;
  SDL_Surface *start_surface, *host_surface, *join_surface, *exit_surface, *options_surface;
  SDL_Texture *start_text, *host_text, *join_text, *exit_text, *options_text; 
  SDL_Rect start_rect, host_rect, join_rect, exit_rect, options_rect;
  SDL_Rect mainmenu_rects[MAIN_SELECTIONS];
};

struct mainmenu_ctx mainmenu;
int state = TITLE;
int running;
int selected_index = START_GAME;


int main(void) 
{
  SDL_Init(SDL_INIT_VIDEO);
  TTF_Init();
  
  init_mainmenu();
  init_start_game();
  init_join();
  init_host();  
  init_overworld();
  init_options();
 
  running = 1;

  //main game loop  
  while (running)
  {  
    handle_event(&event);
  
    SDL_GetMouseState(&mouse_pos.x, &mouse_pos.y);
      
    switch(state)
    {
      case START:
        render_start_game();
        break;
      case OVERWORLD:
        render_overworld();
        break;
      case HOST:
        render_host_game();
        break;
      case JOIN:
        render_join_game();
        break;
      case OPTIONS:
        render_options();
        break;
      case TITLE:
        render_mainmenu();
        break;
    }
  }
  
  SDL_DestroyRenderer(renderer);
  SDL_DestroyWindow(window);
  IMG_Quit();
  SDL_Quit();
  return 0;
}

void render_mainmenu_selected()
{
  int x1, x2, y1, y2;
  switch(selected_index)
  {
    case START_GAME:
      x1 = mainmenu.start_rect.x;
      x2 = x1 + mainmenu.start_rect.w;
      y1 = y2 = mainmenu.start_rect.y + mainmenu.start_rect.h;
      break;
    case HOST_GAME: 
      x1 = mainmenu.host_rect.x;
      x2 = x1 + mainmenu.host_rect.w;
      y1 = y2 = mainmenu.host_rect.y + mainmenu.host_rect.h; 
      break;
    case JOIN_GAME:
      x1 = mainmenu.join_rect.x;
      x2 = x1 + mainmenu.join_rect.w;
      y1 = y2 = mainmenu.join_rect.y + mainmenu.join_rect.h;
      break;
    case OPTIONS_MENU:
      x1 = mainmenu.options_rect.x;
      x2 = x1 + mainmenu.options_rect.w;
      y1 = y2 = mainmenu.options_rect.y + mainmenu.options_rect.h;
      break;
    case EXIT_GAME:
      x1 = mainmenu.exit_rect.x;
      x2 = x1 + mainmenu.exit_rect.w;
      y1 = y2 = mainmenu.exit_rect.y + mainmenu.exit_rect.h;
      break;       
  }
  SDL_RenderDrawLine(renderer, x1, y1, x2, y2);
}

void init_mainmenu()
{
  window = SDL_CreateWindow("Shufflers", SDL_WINDOWPOS_UNDEFINED,
     SDL_WINDOWPOS_UNDEFINED, DEF_WINDOW_WIDTH,DEF_WINDOW_HEIGHT, 0);
  renderer = SDL_CreateRenderer(window, -1, 0);
  IMG_Init(IMG_INIT_PNG);
  SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND);
  SDL_CaptureMouse(SDL_TRUE);  
  
  SDL_StartTextInput();

  mainmenu.background = IMG_LoadTexture(renderer, "assets/mainscreen.png");
  
  mainmenu.font = TTF_OpenFont("assets/font.ttf", 24);
  
  mainmenu.start_surface = TTF_RenderText_Solid(mainmenu.font, "START", white);
  mainmenu.start_text = SDL_CreateTextureFromSurface(renderer, mainmenu.start_surface); 
  mainmenu.host_surface = TTF_RenderText_Solid(mainmenu.font, "HOST", white);
  mainmenu.host_text = SDL_CreateTextureFromSurface(renderer, mainmenu.host_surface); 
  mainmenu.join_surface = TTF_RenderText_Solid(mainmenu.font, "JOIN", white);
  mainmenu.join_text = SDL_CreateTextureFromSurface(renderer, mainmenu.join_surface); 
  mainmenu.exit_surface = TTF_RenderText_Solid(mainmenu.font, "EXIT", white);
  mainmenu.exit_text = SDL_CreateTextureFromSurface(renderer, mainmenu.exit_surface); 
  mainmenu.options_surface = TTF_RenderText_Solid(mainmenu.font, "OPTIONS", white);
  mainmenu.options_text = SDL_CreateTextureFromSurface(renderer, mainmenu.options_surface); 

  mainmenu.start_rect.w = (DEF_WINDOW_WIDTH >> 2) - (DEF_WINDOW_WIDTH >> 3);
  mainmenu.start_rect.h = (DEF_WINDOW_HEIGHT >> 3) - (DEF_WINDOW_HEIGHT >> 4); 
  mainmenu.start_rect.x = (DEF_WINDOW_WIDTH - mainmenu.start_rect.w) >> 1;
  mainmenu.start_rect.y = (DEF_WINDOW_HEIGHT - mainmenu.start_rect.h) >> 1;

  mainmenu.host_rect.w = mainmenu.join_rect.w = mainmenu.exit_rect.w = 
    mainmenu.options_rect.w = mainmenu.start_rect.w;
  mainmenu.options_rect.w <<= 1;
  mainmenu.host_rect.h = mainmenu.join_rect.h = mainmenu.exit_rect.h = 
    mainmenu.options_rect.h = mainmenu.start_rect.h;
  mainmenu.host_rect.x = mainmenu.join_rect.x = mainmenu.exit_rect.x = 
    mainmenu.options_rect.x = mainmenu.start_rect.x;
  mainmenu.options_rect.x -= mainmenu.join_rect.w >> 1;

  mainmenu.host_rect.y = mainmenu.start_rect.y + mainmenu.start_rect.h + SPACING;
  mainmenu.join_rect.y = mainmenu.host_rect.y + mainmenu.host_rect.h + SPACING;
  mainmenu.options_rect.y = mainmenu.join_rect.y + mainmenu.join_rect.h + SPACING;
  mainmenu.exit_rect.y = mainmenu.options_rect.y + mainmenu.options_rect.h + SPACING;
    
  mainmenu.mainmenu_rects[START_GAME] = mainmenu.start_rect;
  mainmenu.mainmenu_rects[HOST_GAME] = mainmenu.host_rect;
  mainmenu.mainmenu_rects[JOIN_GAME] = mainmenu.join_rect;
  mainmenu.mainmenu_rects[OPTIONS_MENU] = mainmenu.options_rect;
  mainmenu.mainmenu_rects[EXIT_GAME] = mainmenu.exit_rect;
  
  return;
}

void render_mainmenu()
{
  SDL_RenderClear(renderer);
    
  SDL_SetRenderDrawColor(renderer, 0,196,0,255);
  SDL_RenderCopy(renderer, mainmenu.background, NULL, NULL);
    
  SDL_RenderCopy(renderer, mainmenu.start_text, NULL, &(mainmenu.start_rect));
  SDL_RenderCopy(renderer, mainmenu.host_text, NULL, &mainmenu.host_rect);
  SDL_RenderCopy(renderer, mainmenu.join_text, NULL, &mainmenu.join_rect);
  SDL_RenderCopy(renderer, mainmenu.options_text, NULL, &mainmenu.options_rect);
  SDL_RenderCopy(renderer, mainmenu.exit_text, NULL, &mainmenu.exit_rect);
  
  for(int i = 0; i<MAIN_SELECTIONS; i++)
  {
    if(SDL_PointInRect(&mouse_pos, &mainmenu.mainmenu_rects[i]))
    {
      selected_index = i;
      break;
    }
  }

  render_mainmenu_selected();   
  SDL_RenderPresent(renderer);
    
  return;
}