#include "State_Options.h"
#include "state.h"
#include "globals.h"
#include "render.h"

char *opt_text_name[] = {
  "Width: ",
  "Height: ",
  "vsync(0 or 1): "
};
char *opt_button_name[] = {
  "Cancel",
  "Apply"
};

int openOptionsState() {
  report(DEBUG, "OptionsState", "opened");

  int offset_x = 256, offset_y = 256;
  int i;
  for (i = 0; i < OPT_TEXT_COUNT; i++) {
    opt_text[i] = newTextt(&g_large_glyphs, ui_colors, opt_text_name[i]);
    opt_text[i]->box.x = offset_x;
    opt_text[i]->box.y = offset_y;
    opt_input[i] = newTextInput(&g_large_glyphs, button_colors, 128);
    opt_input[i]->box.x = opt_text[i]->box.x + opt_text[i]->box.w;
    opt_input[i]->box.y = offset_y;
    offset_y += opt_text[i]->box.h + 8;
  }
  opt_input_a = NULL;
  setTextInputText(opt_input[OPT_TEXT_WIDTH], "%d", g_v_width);
  setTextInputText(opt_input[OPT_TEXT_HEIGHT], "%d", g_v_height);
  setTextInputText(opt_input[OPT_TEXT_VSYNC], "%d", g_v_vsync);

  for (i = 0; i < OPT_BUTTON_COUNT; i++) {
    opt_button[i] = newButton(&g_large_glyphs, button_colors, opt_button_name[i]);
    opt_button[i]->box.x = offset_x;
    opt_button[i]->box.y = offset_y;
    offset_x += opt_button[i]->box.w + 8;
  }
  opt_button_a = NULL;

  return 0;
}

int closeOptionsState() {
  report(DEBUG, "OptionsState", "closed");
  int i;
  for (i = 0; i < OPT_TEXT_COUNT; i++) {
    freeTextt(opt_text[i]);
  }
  for (i = 0; i < OPT_BUTTON_COUNT; i++) {
    freeButton(opt_button[i]);
  }
  return 0;
}

int handleOptionsState(SDL_Event event) {
  int i;
  switch(event.type) {
    case SDL_KEYDOWN:
      if (opt_input_a != NULL) {
        if (event.key.keysym.sym == SDLK_LEFT) {
          if (opt_input_a->cursor > 0) {
            opt_input_a->cursor--;
          }   
        } else if (event.key.keysym.sym == SDLK_RIGHT) {
          if (opt_input_a->cursor < strlen(opt_input_a->text)) {
            opt_input_a->cursor++;
          }   
        } else if (event.key.keysym.sym == SDLK_BACKSPACE) {
          if (opt_input_a->cursor != 0) {
            deleteTextInput(opt_input_a, opt_input_a->cursor-1, 1); 
            opt_input_a->cursor--;
          }   
        }   
      }
      break;
    case SDL_KEYUP:
      if (event.key.keysym.sym == SDLK_ESCAPE) {
        popState(g_state_manager);
      }
      break;
    case SDL_MOUSEBUTTONDOWN:
      if (opt_input_a != NULL) {
        opt_input_a->flags &= ~UI_ACTIVE;
        opt_input_a = NULL;
        SDL_StopTextInput();
      }
      for (i = 0; i < OPT_BUTTON_COUNT; i++) {
        if (inBox(opt_button[i]->box, event.motion.x, event.motion.y)) {
          opt_button_a = opt_button[i];
          opt_button_a->flags |= UI_ACTIVE;
          break;
        }
      }
      for (i = 0; i < OPT_TEXT_COUNT; i++) {
        if (inBox(opt_input[i]->box, event.motion.x, event.motion.y)) {
          opt_input_a = opt_input[i];
          opt_input_a->flags |= UI_ACTIVE;
          SDL_Rect rect = { opt_input_a->box.x, opt_input_a->box.y, opt_input_a->box.w, opt_input_a->box.h };
          SDL_SetTextInputRect(&rect);
          SDL_StartTextInput();
          break;
        }
      }
      break;
    case SDL_MOUSEBUTTONUP:
      if (opt_button_a != NULL) {
        if (inBox(opt_button_a->box, event.motion.x, event.motion.y)) {
          if (opt_button_a == opt_button[OPT_BUTTON_CANCEL]) {
            popState(g_state_manager);
          } else if (opt_button_a == opt_button[OPT_BUTTON_APPLY]) {
            g_v_width = atoi(opt_input[OPT_TEXT_WIDTH]->text);
            g_v_height = atoi(opt_input[OPT_TEXT_HEIGHT]->text);
            g_v_vsync = atoi(opt_input[OPT_TEXT_VSYNC]->text);
            reinitDisplay();
          }
        }
        opt_button_a->flags &= ~UI_ACTIVE;
        opt_button_a = NULL;
      }
      break;
    case SDL_TEXTINPUT:
      if (opt_input_a != NULL) {
        insertTextInput(opt_input_a, event.text.text);
      }
      break;
  }
  return 1;
}

int processOptionsState() {
  return 0;
}

int renderOptionsState() {
  SDL_Color bg = { 16, 16, 16, 200 };
  renderSQuad(0, 0, g_v_width, g_v_height, bg);
  int i;
  for (i = 0; i < OPT_TEXT_COUNT; i++) {
    renderTextt(opt_text[i]);
    renderTextInput(opt_input[i]);
  }
  for (i = 0; i < OPT_BUTTON_COUNT; i++) {
    renderButton(opt_button[i]);
  }
  return 0;
}