#include "lvgl.h"

#include "ui.h"

static const char* M_VAL_TIME = "VAL TIME?";

static const lv_font_t *font_normal = &lv_font_montserrat_24;

static lv_color_t color_primary, color_secondary;
static lv_color_t color_text_hero, color_text_subtitle;

static lv_style_t s_hero, s_subtitle;

static lv_obj_t *o_container = NULL;

static lv_anim_timeline_t *at_active = NULL;
static lv_obj_t *o_active = NULL;
static bool state_ready = true;

static const void* imgfont_get_path(
    const lv_font_t *font, uint32_t unicode, uint32_t unicode_next, int32_t *offset_y, void *user_data) {
  LV_UNUSED(font);
  LV_UNUSED(unicode_next);
  LV_UNUSED(offset_y);
  LV_UNUSED(user_data);

  switch (unicode) {
  case 0x1F319:
    return &ui_img_moon;
  case 0x2B50:
    return &ui_img_star;
  case 0x1F634:
    return &ui_img_sleep;
  default:
    return NULL;
  }
}

static void b_cfg_cb(lv_event_t *e) {
  lv_obj_t *box = lv_msgbox_create(NULL);
  lv_msgbox_add_title(box, "Hello");
  lv_msgbox_add_text(box, "test message");
  lv_msgbox_add_close_button(box);
}

static void setup_next_state() {
  assert(state_ready);
  state_ready = false;

  if (at_active) {
    lv_anim_timeline_delete(at_active);
    at_active = NULL;
  }
  if (o_active) {
    lv_obj_delete(o_active);
    o_active = NULL;
  }

  o_active = lv_obj_create(o_container);
  lv_obj_center(o_active);
  lv_obj_set_style_bg_opa(o_active, LV_OPA_0, 0);
  lv_obj_set_style_border_width(o_active, 0, 0);
  lv_obj_set_size(o_active, lv_pct(100), lv_pct(100));

  at_active = lv_anim_timeline_create();
}

bool val_ui_state_ready() {
  return state_ready;
}

static void anim_state_ready_cb(lv_anim_t *anim) {
  state_ready = true;
}
static void anim_x_cb(void *var, int32_t v) {
  lv_obj_set_x(var, v);
}
static void anim_y_cb(void *var, int32_t v) {
  lv_obj_set_y(var, v);
}
static void anim_opa_cb(void *var, int32_t v) {
  lv_obj_set_style_opa(var, v, 0);
}
static void anim_val_time_text(lv_anim_t *anim) {
  lv_label_set_text_static(anim->var, M_VAL_TIME);
}

void val_ui_none() {
  setup_next_state();

  // Widgets
  lv_obj_t *l_main = lv_label_create(o_active);
  lv_obj_add_style(l_main, &s_hero, 0);
  lv_obj_center(l_main);
  lv_label_set_text_static(l_main, M_VAL_TIME);

  lv_obj_t *l_subtitle = lv_label_create(o_active);
  lv_obj_add_style(l_subtitle, &s_subtitle, 0);
  lv_obj_center(l_subtitle);
  lv_label_set_text_static(l_subtitle, "SOME VAL IS ALWAYS ON THE MENU...");

  lv_obj_update_layout(o_active);
  lv_obj_set_pos(
    l_subtitle,
    -(lv_obj_get_width(l_main) - lv_obj_get_width(l_subtitle)) / 2,
    (lv_obj_get_height(l_main) + lv_obj_get_height(l_subtitle)) / 2 + 5);

  lv_label_set_text_static(l_main, "HELLO \U0001F319\u2B50!");
  lv_obj_update_layout(o_active);

  // Animations
  lv_anim_t a_hello_in;
  lv_anim_init(&a_hello_in);
  lv_anim_set_var(&a_hello_in, l_main);
  lv_anim_set_values(
    &a_hello_in,
    (lv_obj_get_height(o_container) - lv_obj_get_height(l_main)) / 2, 0);
  lv_anim_set_exec_cb(&a_hello_in, anim_y_cb);
  lv_anim_set_path_cb(&a_hello_in, lv_anim_path_ease_in);
  lv_anim_set_duration(&a_hello_in, 500);

  lv_anim_t a_hello_out;
  lv_anim_init(&a_hello_out);
  lv_anim_set_var(&a_hello_out, l_main);
  lv_anim_set_values(&a_hello_out, 255, 0);
  lv_anim_set_exec_cb(&a_hello_out, anim_opa_cb);
  lv_anim_set_path_cb(&a_hello_out, lv_anim_path_linear);
  lv_anim_set_duration(&a_hello_out, 500);

  lv_anim_t a_val;
  lv_anim_init(&a_val);
  lv_anim_set_early_apply(&a_val, false);
  lv_anim_set_var(&a_val, l_main);
  lv_anim_set_values(&a_val, 0, 255);
  lv_anim_set_start_cb(&a_val, anim_val_time_text);
  lv_anim_set_exec_cb(&a_val, anim_opa_cb);
  lv_anim_set_path_cb(&a_val, lv_anim_path_linear);
  lv_anim_set_duration(&a_val, 500);

  lv_anim_t a_sub;
  lv_anim_init(&a_sub);
  lv_anim_set_var(&a_sub, l_subtitle);
  lv_anim_set_values(&a_sub, 0, 255);
  lv_anim_set_exec_cb(&a_sub, anim_opa_cb);
  lv_anim_set_path_cb(&a_sub, lv_anim_path_linear);
  lv_anim_set_completed_cb(&a_sub, anim_state_ready_cb);
  lv_anim_set_duration(&a_sub, 750);

  lv_anim_timeline_add(at_active, 0, &a_hello_in);
  lv_anim_timeline_add(at_active, 3000, &a_hello_out);
  lv_anim_timeline_add(at_active, 3250, &a_val);
  lv_anim_timeline_add(at_active, 3750, &a_sub);
  lv_anim_timeline_start(at_active);
}

void val_ui_menu(bool was_idle) {
  setup_next_state();

  // Widgets
  lv_obj_t *l_main = lv_label_create(o_active);
  lv_obj_add_style(l_main, &s_hero, 0);
  lv_obj_center(l_main);
  lv_label_set_text_static(l_main, "LET'S GO");

  lv_obj_t *l_subtitle = lv_label_create(o_active);
  lv_obj_add_style(l_subtitle, &s_subtitle, 0);
  lv_obj_center(l_subtitle);
  lv_label_set_text_static(l_subtitle, was_idle ? "WELCOME BACK!" : "GET QUEUEING!");

  lv_obj_update_layout(o_active);

  // Animations
  lv_anim_t a_title;
  lv_anim_init(&a_title);
  lv_anim_set_var(&a_title, l_main);
  lv_anim_set_values(
    &a_title,
    -(lv_obj_get_height(o_container) - lv_obj_get_height(l_main)) / 2, 0);
  lv_anim_set_exec_cb(&a_title, anim_y_cb);
  lv_anim_set_path_cb(&a_title, lv_anim_path_ease_in);
  lv_anim_set_duration(&a_title, 500);

  lv_anim_t a_sub;
  lv_anim_init(&a_sub);
  lv_anim_set_var(&a_sub, l_subtitle);
  lv_anim_set_values(
    &a_sub,
    (lv_obj_get_height(o_container) - lv_obj_get_height(l_main)) / 2,
    (lv_obj_get_height(l_main) + lv_obj_get_height(l_subtitle)) / 2 + 5);
  lv_anim_set_exec_cb(&a_sub, anim_y_cb);
  lv_anim_set_path_cb(&a_sub, lv_anim_path_ease_in);
  lv_anim_set_completed_cb(&a_sub, anim_state_ready_cb);
  lv_anim_set_duration(&a_sub, 500);

  lv_anim_timeline_add(at_active, 0, &a_title);
  lv_anim_timeline_add(at_active, 0, &a_sub);
  lv_anim_timeline_start(at_active);
}

void val_ui_idle() {
  setup_next_state();

  // Widgets
  lv_obj_t *l_main = lv_label_create(o_active);
  lv_obj_add_style(l_main, &s_hero, 0);
  lv_obj_center(l_main);
  lv_label_set_text_static(l_main, "\U0001F634");

  lv_obj_t *l_subtitle = lv_label_create(o_active);
  lv_obj_add_style(l_subtitle, &s_subtitle, 0);
  lv_obj_center(l_subtitle);
  lv_label_set_text_static(l_subtitle, "COME BACK SOON...");

  lv_obj_update_layout(o_active);
  lv_obj_set_y(
    l_subtitle,
    (lv_obj_get_height(l_main) + lv_obj_get_height(l_subtitle)) / 2 + 5);

  // Animations
  lv_anim_t a_fade_in;
  lv_anim_init(&a_fade_in);
  lv_anim_set_values(&a_fade_in, 0, 255);
  lv_anim_set_exec_cb(&a_fade_in, anim_opa_cb);
  lv_anim_set_path_cb(&a_fade_in, lv_anim_path_ease_in);
  lv_anim_set_duration(&a_fade_in, 1000);

  lv_anim_set_var(&a_fade_in, l_main);
  lv_anim_timeline_add(at_active, 0, &a_fade_in);

  lv_anim_set_var(&a_fade_in, l_subtitle);
  lv_anim_set_completed_cb(&a_fade_in, anim_state_ready_cb);
  lv_anim_timeline_add(at_active, 0, &a_fade_in);

  lv_anim_timeline_start(at_active);
}

void val_lvgl_ui(lv_display_t *disp) {
  color_primary = lv_color_hex(0xff4655);
  color_secondary = lv_color_hex(0xf7518f);

  color_text_hero = lv_palette_lighten(LV_PALETTE_GREY, 2);
  color_text_subtitle = lv_palette_darken(LV_PALETTE_GREY, 2);

  // init default theme
  lv_theme_default_init(
    disp, color_primary, color_secondary,
    true, // dark theme
    font_normal);
  // lv_sysmon_hide_performance(disp);

  lv_font_t *f_hero_emoji = lv_imgfont_create(120, imgfont_get_path, NULL);
  assert(f_hero_emoji);
  f_hero_emoji->fallback = &lv_font_tungsten_180;

  lv_style_init(&s_hero);
  lv_style_set_text_font(&s_hero, f_hero_emoji);
  lv_style_set_text_color(&s_hero, color_text_hero);

  lv_style_init(&s_subtitle);
  lv_style_set_text_font(&s_subtitle, &lv_font_tungsten_40);
  lv_style_set_text_color(&s_subtitle, color_text_subtitle);

  // Background
  lv_obj_t *i_bg = lv_image_create(lv_screen_active());
  lv_image_set_src(i_bg, &ui_img_bg);

  // Content container
  o_container = lv_obj_create(lv_screen_active());
  lv_obj_set_style_bg_opa(o_container, LV_OPA_0, 0);
  lv_obj_set_style_border_width(o_container, 0, 0);
  lv_obj_set_style_pad_all(o_container, 0, 0);
  lv_obj_set_size(o_container, lv_pct(100), lv_pct(100));

  // Settings button
  lv_obj_t *b_cfg = lv_button_create(lv_screen_active());
  lv_obj_align(b_cfg, LV_ALIGN_BOTTOM_RIGHT, -10, -10);
  lv_obj_add_event_cb(b_cfg, b_cfg_cb, LV_EVENT_CLICKED, NULL);

  lv_obj_t *l_cfg = lv_label_create(b_cfg);
  lv_label_set_text(l_cfg, LV_SYMBOL_SETTINGS);
  lv_obj_center(l_cfg);

  val_ui_none();
}