/**
 * minigames/memory.js
 * 🃏 Memory — Finde alle Paare, so schnell wie möglich!
 */
window.MG_memory = (function() {

  const ID       = 'memory';
  const EMOJI    = '🃏';
  const NAME     = 'Memory';
  const DESC     = 'Finde alle Paare — so schnell wie möglich!';
  const CONTROLS = 'Mausklick / Tippen';
  const MULTI    = 1;

  function run(wrap, W, H, cfg, onDone) {
    const { canvas, ctx } = MGAPI.makeCanvas(wrap, W, H);
    const theme   = cfg.theme || { primary: '#8b5cf6' };
    const EMOJIS  = cfg.emojis || ['🐱','🐶','🦊','🐸','🦋','🐠'];

    const all   = [...EMOJIS, ...EMOJIS].sort(() => Math.random() - 0.5);
    let cards   = all.map((e, i) => ({ e, i, open: false }));
    let flipped = [], matched = [], checking = false, moves = 0;
    let stopped = false, raf, startTime = null, elapsed = 0;

    // Layout: 4×3
    const COLS = 4, ROWS = Math.ceil(all.length / 4);
    const PAD  = 8;
    const cw   = Math.floor((W - PAD * (COLS + 1)) / COLS);
    const ch   = Math.floor((H - PAD * (ROWS + 2) - 24) / ROWS);
    const ox   = (W - COLS * cw - PAD * (COLS - 1)) / 2;
    const oy   = 30;

    function cardAt(mx, my) {
      for (let ri = 0; ri < ROWS; ri++) {
        for (let ci = 0; ci < COLS; ci++) {
          const idx  = ri * COLS + ci;
          if (idx >= cards.length) continue;
          const x = ox + ci * (cw + PAD);
          const y = oy + ri * (ch + PAD);
          if (mx >= x && mx < x + cw && my >= y && my < y + ch) return cards[idx];
        }
      }
      return null;
    }

    function onClick(e) {
      if (checking) return;
      const rect = canvas.getBoundingClientRect();
      const scaleX = canvas.width  / rect.width;
      const scaleY = canvas.height / rect.height;
      const mx = (e.clientX - rect.left) * scaleX;
      const my = (e.clientY - rect.top)  * scaleY;
      const card = cardAt(mx, my);
      if (!card || card.open || matched.includes(card.i)) return;
      if (!startTime) startTime = performance.now();

      card.open = true;
      flipped.push(card);
      if (flipped.length === 2) {
        moves++;
        checking = true;
        setTimeout(() => {
          if (flipped[0].e === flipped[1].e) {
            matched.push(flipped[0].i, flipped[1].i);
            if (matched.length === cards.length) {
              setTimeout(() => onDone(true), 600);
            }
          } else {
            flipped.forEach(c => c.open = false);
          }
          flipped   = [];
          checking  = false;
        }, 700);
      }
    }

    canvas.addEventListener('click', onClick);

    // Karten-Flip-Animation (progress 0–1)
    const flipAnim = new Map(); // card.i → { prog, dir }

    function loop(ts) {
      if (stopped) return;
      raf = requestAnimationFrame(loop);
      if (startTime) elapsed = (performance.now() - startTime) / 1000;

      ctx.fillStyle = '#050508';
      ctx.fillRect(0, 0, W, H);

      // HUD
      MGAPI.text(ctx, `🃏 ${matched.length / 2} / ${EMOJIS.length}  |  Züge: ${moves}`, W / 2, 16,
        { size: 12, color: theme.primary });

      // Karten zeichnen
      for (let ri = 0; ri < ROWS; ri++) {
        for (let ci = 0; ci < COLS; ci++) {
          const idx  = ri * COLS + ci;
          if (idx >= cards.length) continue;
          const card = cards[idx];
          const x    = ox + ci * (cw + PAD);
          const y    = oy + ri * (ch + PAD);
          const isM  = matched.includes(card.i);
          const isOpen = card.open || isM;

          if (isM) {
            MGAPI.roundRect(ctx, x, y, cw, ch, 8,
              'rgba(16,185,129,0.15)', '#10b981');
          } else if (isOpen) {
            MGAPI.roundRect(ctx, x, y, cw, ch, 8,
              `${theme.primary}22`, theme.primary);
          } else {
            MGAPI.roundRect(ctx, x, y, cw, ch, 8,
              'rgba(255,255,255,0.04)', 'rgba(255,255,255,0.1)');
          }

          if (isOpen) {
            ctx.font      = `${Math.min(cw, ch) * 0.55}px serif`;
            ctx.textAlign = 'center';
            ctx.fillText(card.e, x + cw / 2, y + ch / 2 + ch * 0.15);
          } else {
            MGAPI.text(ctx, '?', x + cw / 2, y + ch / 2,
              { size: Math.floor(ch * 0.35), color: 'rgba(255,255,255,0.2)' });
          }
        }
      }
    }

    raf = requestAnimationFrame(loop);
    return {
      stop() {
        stopped = true;
        cancelAnimationFrame(raf);
        canvas.removeEventListener('click', onClick);
      },
    };
  }

  function launch(wrap, W, H, cfg)  { return run(wrap, W, H, cfg, won => MGAPI.onResult(won)); }
  function preview(wrap, W, H, cfg) { return run(wrap, W, H, cfg, won => MGAPI.onResult(won)); }

  return { id: ID, emoji: EMOJI, name: NAME, desc: DESC, controls: CONTROLS, multi: MULTI, launch, preview };

})();