#include <pebble.h>
#include "font-loader.h"

static void init(void);
static void deinit(void);
static void window_load(Window *window);
static void window_unload(Window *window);
static void click_config_provider(void *context);
static void select_click_handler(ClickRecognizerRef recognizer, void *context);
static void up_click_handler(ClickRecognizerRef recognizer, void *context);
static void down_click_handler(ClickRecognizerRef recognizer, void *context);

static Window* window;
static TextLayer* text_layer;

int main(void) {
  init();
  app_event_loop();
  deinit();
}

static void init(void) {
  fonts_init();
  fonts_assign("up font", RESOURCE_ID_FONT_DEMO_ALPHA_24);
  fonts_assign("select font", RESOURCE_ID_FONT_DEMO_BETA_24);
  fonts_assign("down font", RESOURCE_ID_FONT_DEMO_GAMMA_24);

  window = window_create();
  window_set_click_config_provider(window, click_config_provider);
  window_set_window_handlers(window, (WindowHandlers) {
    .load = window_load,
    .unload = window_unload,
  });
  window_stack_push(window, true);
}

static void deinit(void) {
  window_destroy(window);
  fonts_cleanup();
}

static void window_load(Window *window) {
  text_layer = text_layer_create(GRect(8, 8, 128, 100));
  text_layer_set_text(text_layer, "PRESS BUTTONS TO SWITCH FONT");
  text_layer_set_text_alignment(text_layer, GTextAlignmentLeft);
  layer_add_child(window_get_root_layer(window), text_layer_get_layer(text_layer));
}

static void window_unload(Window *window) {
  text_layer_destroy(text_layer);
}

static void click_config_provider(void *context) {
  window_single_click_subscribe(BUTTON_ID_SELECT, select_click_handler);
  window_single_click_subscribe(BUTTON_ID_UP, up_click_handler);
  window_single_click_subscribe(BUTTON_ID_DOWN, down_click_handler);
}

static void select_click_handler(ClickRecognizerRef recognizer, void *context) {
  text_layer_set_font(text_layer, fonts_get_font_by_name("select font"));
}

static void up_click_handler(ClickRecognizerRef recognizer, void *context) {
  text_layer_set_font(text_layer, fonts_get_font_by_name("up font"));
}

static void down_click_handler(ClickRecognizerRef recognizer, void *context) {
  text_layer_set_font(text_layer, fonts_get_font(RESOURCE_ID_FONT_DEMO_GAMMA_24));
}