#include <bitset>

#include "platform.hpp"

Platform::Platform(const char* title, int windowWidth, int windowHeight, int textureWidth, int textureHeight) {
  SDL_Init(SDL_INIT_VIDEO);
  
  window = SDL_CreateWindow(title, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, windowWidth, windowHeight, SDL_WINDOW_SHOWN);
  renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
}

Platform::~Platform() {
  SDL_DestroyRenderer(renderer);
  SDL_DestroyWindow(window);
  SDL_Quit();
}

void Platform::Update(const std::bitset<4096>& bitset, int videoScale) {
    SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
    SDL_RenderClear(renderer);

    for (int y = 0; y < 32; ++y) {
        for (int x = 0; x < 64; ++x) {
            SDL_Rect pixelRect = {x * videoScale, y * videoScale, videoScale, videoScale};

            if (bitset[y * 64 + x]) {
                SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
            } else {
                SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
            }

            SDL_RenderFillRect(renderer, &pixelRect);
        }
    }

    SDL_RenderPresent(renderer);
}

bool Platform::ProcessInput(uint8_t* keys) {
  bool quit = false;

  SDL_Event event;

  while (SDL_PollEvent(&event)) {
    switch (event.type) {
      case SDL_QUIT:
        quit = true;
        break;

      case SDL_KEYDOWN:
        switch (event.key.keysym.sym) {
          case SDLK_ESCAPE: quit = true;
          case SDLK_x: keys[0x0] = 1; break;
          case SDLK_1: keys[0x1] = 1; break;
          case SDLK_2: keys[0x2] = 1; break;
          case SDLK_3: keys[0x3] = 1; break;
          case SDLK_q: keys[0x4] = 1; break;
          case SDLK_w: keys[0x5] = 1; break;
          case SDLK_e: keys[0x6] = 1; break;
          case SDLK_a: keys[0x7] = 1; break;
          case SDLK_s: keys[0x8] = 1; break;
          case SDLK_d: keys[0x9] = 1; break;
          case SDLK_z: keys[0xA] = 1; break;
          case SDLK_c: keys[0xB] = 1; break;
          case SDLK_4: keys[0xC] = 1; break;
          case SDLK_r: keys[0xD] = 1; break;
          case SDLK_f: keys[0xE] = 1; break;
          case SDLK_v: keys[0xF] = 1; break;
        } break;

      case SDL_KEYUP:
        switch (event.key.keysym.sym) {
          case SDLK_x: keys[0x0] = 0; break;
          case SDLK_1: keys[0x1] = 0; break;
          case SDLK_2: keys[0x2] = 0; break;
          case SDLK_3: keys[0x3] = 0; break;
          case SDLK_q: keys[0x4] = 0; break;
          case SDLK_w: keys[0x5] = 0; break;
          case SDLK_e: keys[0x6] = 0; break;
          case SDLK_a: keys[0x7] = 0; break;
          case SDLK_s: keys[0x8] = 0; break;
          case SDLK_d: keys[0x9] = 0; break;
          case SDLK_z: keys[0xA] = 0; break;
          case SDLK_c: keys[0xB] = 0; break;
          case SDLK_4: keys[0xC] = 0; break;
          case SDLK_r: keys[0xD] = 0; break;
          case SDLK_f: keys[0xE] = 0; break;
          case SDLK_v: keys[0xF] = 0; break;
        }
    }
  }

  return quit;
}