// Inventory UI
import { state } from '../core/state.js';
import { BLOCKS } from '../data/blocks.js';
import { ITEMS } from '../data/items.js';
import { TOOLS } from '../data/tools.js';
import { tex, itemTex } from '../render/textures.js';
import { playSound } from '../audio/sound-engine.js';
import { rebuildHotbar } from './hotbar.js';

export function renderInventory() {
  const inventoryGrid = state.inventoryGrid;
  const inv = state.inv;
  const selected = state.selected;
  inventoryGrid.innerHTML = '';

  const items = Object.keys(inv).filter(id => inv[id] > 0);

  for (let i = 0; i < 21; i++) {
    const slot = document.createElement('div');
    slot.className = 'inv-slot' + (i < items.length && items[i] === selected ? ' sel' : '');

    if (i < items.length) {
      const id = items[i];
      // Canvas sprite: block > itemTex > emoji fallback > unknown item fallback
      if (BLOCKS[id] && tex[id]) {
        slot.style.backgroundImage = `url(${tex[id].toDataURL()})`;
        slot.style.backgroundSize = 'cover';
      } else if (itemTex[id]) {
        slot.style.backgroundImage = `url(${itemTex[id].toDataURL()})`;
        slot.style.backgroundSize = 'cover';
      } else if (ITEMS[id]) {
        slot.textContent = ITEMS[id].icon || '📦';
      } else if (TOOLS[id]) {
        slot.textContent = TOOLS[id].icon || '🔧';
      } else if (id === 'iron_armor') {
        slot.textContent = '🛡️';
        slot.style.background = 'linear-gradient(135deg, #95a5a6 0%, #7f8c8d 100%)';
      } else {
        // Unknown item fallback — grey box with first letter
        slot.textContent = id.charAt(0).toUpperCase();
        slot.style.background = '#555';
        slot.style.color = '#fff';
        slot.style.fontWeight = '700';
        slot.style.fontSize = '14px';
      }

      const count = document.createElement('div');
      count.className = 'inv-count';
      count.textContent = inv[id];
      slot.appendChild(count);

      slot.onclick = () => {
        playSound('click');
        state.selected = id;
        state.recentItems = state.recentItems.filter(item => item !== id);
        state.recentItems.unshift(id);
        state.recentItems = state.recentItems.slice(0, 5);
        rebuildHotbar();
        renderInventory();
      };

      // Двойной клик для надевания брони
      slot.ondblclick = () => {
        if (id === 'iron_armor' && inv.iron_armor > 0) {
          if (state.player.equippedArmor === 'iron_armor') {
            state.player.equippedArmor = null;
            state.player.armor = 0;
          } else {
            state.player.equippedArmor = 'iron_armor';
            state.player.armor = BLOCKS['iron_armor'].armor;
          }
          playSound('click');
          renderInventory();
        }
      };
    }

    inventoryGrid.appendChild(slot);
  }
}