// ==================== ENTRY POINT ====================
import { state } from './core/state.js';
import { SERVER_URL } from './config.js';
import { showStartMenu, isTgWebApp, tgUser } from './ui/start-menu.js';
import { initCanvas } from './core/canvas.js';
import { initSocket } from './multiplayer/socket.js';
import { loadSound, playSound } from './audio/sound-engine.js';
import { initTextures, tex } from './render/textures.js';
import { getBlock, setBlock, removeBlock } from './world/world-storage3d.js';
import { genColumn, surfaceGyAt, resetGenerationCache } from './world/generation3d.js';
import { initDB, loadGame, applySave, saveGame } from './game/save.js';
import { loop } from './game/loop3d.js';
import { initChat } from './ui/chat.js';
import { initFurnace } from './ui/furnace.js';
import { initMinimap } from './ui/minimap.js';
import { initSaveControls, updateSaveButtonVisibility } from './ui/save-controls.js';
import { initMarket } from './ui/market.js';
import { initSettings } from './ui/settings.js';
import { initRespawn } from './ui/respawn.js';
import { initShare } from './ui/share.js';
import { initControls } from './input/controls.js';
import { initModes } from './game/modes.js';
import { initVoice } from './multiplayer/voice-chat.js';
import { rebuildHotbar } from './ui/hotbar.js';
import { toggleCraft, closeCraft, toggleInventory, closeInventory } from './ui/craft.js';

// ==================== 1) CONFIG — parse URL ====================
// urlParams defined in config.js
state.SERVER_URL = SERVER_URL;
state.TELEGRAM_BOT_USERNAME = 'Grechkacraft_bot';
state.TELEGRAM_APP_SHORT_NAME = 'minegrechka';

// Set TG-related state
if (isTgWebApp) {
  state.myTgId = tgUser?.id || null;
}

state.heroImg = new Image(); state.heroImg.src = 'https://supamg.mkn8n.ru/storage/v1/object/public/img//grechka.png';

// ==================== 2) START MENU ====================
// Show the start menu before initializing the game.
// The menu returns a Promise that resolves with the worldId.
async function startGame() {
  const worldId = await showStartMenu();
  
  // Set worldId and playerName
  state.worldId = worldId;
  if (!state.playerName) {
    state.playerName = localStorage.getItem('minegrechka_playerName') || 'Игрок';
    localStorage.setItem('minegrechka_playerName', state.playerName);
  }
  console.log('[Launch] worldId:', state.worldId, 'player:', state.playerName, 'tg:', isTgWebApp);

  // Validate TG initData if in TG context
  if (isTgWebApp && window.Telegram && Telegram.WebApp.initData) {
    try {
      const resp = await fetch(state.SERVER_URL + '/api/tg/auth', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ initData: Telegram.WebApp.initData })
      });
      const data = await resp.json();
      if (data.ok && data.tg_id) {
        console.log('[TG] Authenticated, tg_id:', data.tg_id);
        state.myTgId = data.tg_id;
      }
    } catch (e) { console.warn('[TG] Auth failed:', e); }
  }

  // Update URL with world code
  try {
    const newUrl = new URL(window.location.href);
    newUrl.searchParams.set('world', state.worldId);
    if (typeof history !== 'undefined' && history.replaceState) {
      history.replaceState(null, '', newUrl.toString());
    }
  } catch (e) {}

  // ==================== 3) CANVAS — init from canvas module ====================
  initCanvas();

  // ==================== 4) STATE — set DOM refs ====================
  state.hpEl = document.getElementById('hp');
  state.foodEl = document.getElementById('food');
  state.sxEl = document.getElementById('sx');
  state.syEl = document.getElementById('sy');
  state.todEl = document.getElementById('tod');
  state.worldIdEl = document.getElementById('worldId');
  state.playerCountEl = document.getElementById('playerCount');
  state.deathEl = document.getElementById('death');
  state.hotbarEl = document.getElementById('hotbar');
  state.craftPanel = document.getElementById('craftPanel');
  state.recipesEl = document.getElementById('recipes');
  state.inventoryPanel = document.getElementById('inventoryPanel');
  state.inventoryGrid = document.getElementById('inventoryGrid');
  state.marketPanel = document.getElementById('marketPanel');
  state.marketContent = document.getElementById('marketContent');
  state.tradePanel = document.getElementById('tradePanel');
  state.tradeContent = document.getElementById('tradeContent');
  state.multiplayerStatus = document.getElementById('multiplayerStatus');

  // ==================== 5) TEXTURES — initTextures() ====================
  initTextures();
  state.tex = tex;

  // ==================== 6) CRAFT/INVENTORY BUTTONS ====================
  const craftBtn = document.getElementById('craftBtn');
  const invToggle = document.getElementById('invToggle');
  const craftClose = document.getElementById('craftClose');
  const inventoryClose = document.getElementById('inventoryClose');

  if (craftBtn) craftBtn.onclick = () => toggleCraft();
  if (craftClose) craftClose.onclick = () => closeCraft();
  if (invToggle) invToggle.onclick = () => toggleInventory();
  if (inventoryClose) inventoryClose.onclick = () => closeInventory();

  // ==================== 7) CONTROLS — initControls ====================
  initControls();

  // ==================== 9) UI MODULES — init all UI ====================
  initChat();
  initFurnace();
  initMinimap();
  initSaveControls();
  initMarket();
  initRespawn();
  initShare();
  initSettings();
  initModes();

  // ==================== 10) SOCKET — initSocket ====================
  initSocket();

  // ==================== 11) VOICE — initVoice ====================
  initVoice();

  // ==================== 12) SAVE — loadGame, applySave ====================
  // Ensure hotbar has items on first load
  if (state.recentItems.length === 0) {
    state.recentItems = Object.keys(state.inv).filter(k => state.inv[k] > 0).slice(0, 5);
  }
  // Make sure selected item is valid and in recentItems
  if (!state.selected || !state.inv[state.selected] || state.inv[state.selected] <= 0) {
    state.selected = state.recentItems[0] || 'dirt';
  }
  if (!state.recentItems.includes(state.selected)) {
    state.recentItems.unshift(state.selected);
    state.recentItems = state.recentItems.slice(0, 5);
  }
  rebuildHotbar();

  // Keyboard hotbar switching (1/2/3)
  document.addEventListener('keydown', (e) => {
    if (state.showFullInventory || state.craftOpen || state.inventoryOpen || state.chatOpen) return;
    if (e.key >= '1' && e.key <= '3') {
      const items = state.recentItems.filter(id => state.inv[id] > 0).slice(0, 3);
      const idx = parseInt(e.key) - 1;
      if (items[idx]) {
        state.selected = items[idx];
        rebuildHotbar();
      }
    }
  });

  // Scroll wheel hotbar cycling
  document.addEventListener('wheel', (e) => {
    if (state.showFullInventory || state.craftOpen || state.inventoryOpen || state.chatOpen) return;
    const items = state.recentItems.filter(id => state.inv[id] > 0).slice(0, 3);
    if (items.length === 0) return;
    let idx = items.indexOf(state.selected);
    if (idx < 0) idx = 0;
    if (e.deltaY > 0) idx = (idx + 1) % items.length;
    else idx = (idx - 1 + items.length) % items.length;
    state.selected = items[idx];
    rebuildHotbar();
    e.preventDefault();
  }, { passive: false });

  initDB().then(async () => {
    const loadedSave = await loadGame();
    if (loadedSave) {
      await applySave(loadedSave);
      console.log('Загружено сохранение, HP:', state.player.hp);

      if (state.player.hp <= 0) {
        console.log('WARNING: HP <= 0 после загрузки, возрождаемся');
        state.player.hp = 100;
        state.player.hunger = 100;
        state.player.o2 = 100;
        state.player.x = state.spawnPoint.x;
        state.player.y = state.spawnPoint.y;
        state.player.vx = state.player.vy = 0;
        state.player.invuln = 0;
        state.player.fallStartY = state.player.y;
      }
    } else {
      console.log('Сохранение не найдено, начинаем новую игру');
      // Fill recentItems from inventory
      state.recentItems = Object.keys(state.inv).filter(k => state.inv[k] > 0).slice(0, 5);
      rebuildHotbar();

      state.player.hp = 100;
      state.player.hunger = 100;
      state.player.o2 = 100;
      state.player.vx = state.player.vy = 0;
      state.player.invuln = 0;

      // старт — на поверхности
      const startGX = 6, startGZ = 0;
      state.player.x = startGX * state.TILE;
      state.player.z = startGZ * state.TILE;
      state.player.vx = state.player.vy = state.player.vz = 0;
      for (let dx = -4; dx <= 4; dx++) {
        for (let dz = -20; dz <= 20; dz++) genColumn(startGX + dx, startGZ + dz);
      }
      const surfaceY = surfaceGyAt(startGX, startGZ);
      let safeGY = surfaceY - 1;
      const aboveBlock = getBlock(startGX, surfaceY - 1, startGZ);
      if (aboveBlock && (aboveBlock.t === 'water' || aboveBlock.t === 'swamp_water')) {
        for (let gy = state.SEA_GY - 1; gy >= 0; gy--) {
          const b = getBlock(startGX, gy, startGZ);
          if (!b || b.dead || b.t === 'air' || b.t === 'water') continue;
          safeGY = gy - 1;
          break;
        }
      }
      state.player.y = safeGY * state.TILE;
      state.player.fallStartY = state.player.y;
      state.spawnPoint.x = state.player.x;
      state.spawnPoint.y = state.player.y;
      state.spawnPoint.z = state.player.z;
      console.log('Новая 3D игра: gx=', startGX, 'gz=', startGZ, 'surfaceY=', surfaceY, 'y=', state.player.y);
    }

    // Автосейв при скрытии страницы
    document.addEventListener('visibilitychange', () => {
      if (document.hidden) {
        saveGame();
      }
    });

    // Автосейв перед закрытием страницы
    window.addEventListener('beforeunload', () => {
      saveGame();
    });
  }).catch(err => {
    console.error('Ошибка инициализации:', err);
    const startGX = 6, startGZ = 0;
    genColumn(startGX, startGZ);
    state.player.y = (surfaceGyAt(startGX, startGZ) - 1) * state.TILE;
    state.player.fallStartY = state.player.y;
    for (let gx = startGX - 4; gx <= startGX + 4; gx++) {
      for (let gz = -20; gz <= 20; gz++) genColumn(gx, startGZ + gz);
    }
  });

  // ==================== 13) LOOP — startLoop ====================
  requestAnimationFrame(loop);
}

// Start the game (v3 — 3D)
startGame().catch(err => {
  console.error('Fatal error starting game:', err);
});

// Debug: give items
window.debugGive = function(id, count) {
  state.inv[id] = (state.inv[id] || 0) + (count || 1);
  if (!state.recentItems.includes(id)) { state.recentItems.unshift(id); state.recentItems = state.recentItems.slice(0, 5); }
  rebuildHotbar();
  // Can't call renderInventory from here, but user can click inv
  console.log('Gave', count || 1, id, '=>', state.inv[id]);
  console.log('inv keys>0:', Object.keys(state.inv).filter(k => state.inv[k] > 0).join(', '));
};
window.debugInv = function() { return Object.keys(state.inv).filter(k => state.inv[k] > 0).map(k => k + ':' + state.inv[k]); };