/**
 * minigames/flappy.js
 * 🐦 Flappy Bird — Klicke oder Leertaste, um durch die Röhren zu fliegen!
 */
window.MG_flappy = (function() {

  const ID       = 'flappy';
  const EMOJI    = '🐦';
  const NAME     = 'Flappy Bird';
  const DESC     = 'Klick oder Leertaste, um zu fliegen. 3 Hindernisse schaffen = Sieg!';
  const CONTROLS = 'Klick / Leertaste';
  const MULTI    = 1;

  function run(wrap, W, H, cfg, onDone) {
    const { canvas, ctx } = MGAPI.makeCanvas(wrap, W, H);
    const theme    = cfg.theme || { primary: '#06b6d4' };
    const WIN_PIPES = cfg.winPipes || 3;
    const GRAV = 0.5, JUMP = -8, PW = 38, GAP = 85;

    let bird     = { y: H / 2, vy: 0 };
    let pipes    = [{ x: W, gap: Math.random() * (H - 100) + 30 }];
    let score    = 0;
    let dead     = false;
    let started  = false;
    let stopped  = false;
    let raf, endTimer;

    const jump = () => { if (!dead) { bird.vy = JUMP; started = true; } };
    const onKey = e => { if (e.code === 'Space') { e.preventDefault(); jump(); } };
    document.addEventListener('keydown', onKey);
    canvas.addEventListener('click', jump);
    // Touch
    canvas.addEventListener('touchstart', e => { e.preventDefault(); jump(); }, { passive: false });

    function loop() {
      if (stopped) return;
      raf = requestAnimationFrame(loop);

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

      // Hintergrund-Gradient
      const grad = ctx.createLinearGradient(0, 0, 0, H);
      grad.addColorStop(0, '#0a0a1a');
      grad.addColorStop(1, '#050508');
      ctx.fillStyle = grad;
      ctx.fillRect(0, 0, W, H);

      if (started && !dead) {
        bird.vy += GRAV;
        bird.y  += bird.vy;
        pipes.forEach(p => p.x -= 2.8);
        if (pipes[pipes.length - 1].x < W - 170)
          pipes.push({ x: W, gap: Math.random() * (H - 100) + 30 });
        pipes = pipes.filter(p => p.x > -PW);
        pipes.forEach(p => { if (p.x + PW < 50 && !p.passed) { p.passed = true; score++; } });

        if (bird.y < 0 || bird.y + 20 > H) dead = true;
        pipes.forEach(p => {
          if (50 < p.x + PW && 70 > p.x && (bird.y < p.gap || bird.y + 20 > p.gap + GAP))
            dead = true;
        });
        if (dead && !endTimer)
          endTimer = setTimeout(() => onDone(score >= WIN_PIPES), 1000);
        if (score >= WIN_PIPES && !dead && !endTimer)
          endTimer = setTimeout(() => onDone(true), 400);
      }

      // Röhren zeichnen
      pipes.forEach(p => {
        // Röhren-Körper
        MGAPI.roundRect(ctx, p.x, 0, PW, p.gap - 8, 4, `${theme.primary}cc`, null);
        MGAPI.roundRect(ctx, p.x - 3, p.gap - 12, PW + 6, 12, 4, `${theme.primary}ee`, null);
        MGAPI.roundRect(ctx, p.x, p.gap + GAP + 8, PW, H - p.gap - GAP - 8, 4, `${theme.primary}cc`, null);
        MGAPI.roundRect(ctx, p.x - 3, p.gap + GAP, PW + 6, 12, 4, `${theme.primary}ee`, null);
      });

      // Vogel
      ctx.shadowColor = dead ? '#ef4444' : theme.primary;
      ctx.shadowBlur  = 12;
      ctx.fillStyle   = dead ? '#ef4444' : theme.primary;
      ctx.beginPath();
      ctx.ellipse(50 + 14, bird.y + 10, 14, 10, bird.vy * 0.04, 0, Math.PI * 2);
      ctx.fill();
      // Auge
      ctx.shadowBlur  = 0;
      ctx.fillStyle   = '#fff';
      ctx.beginPath();
      ctx.arc(50 + 20, bird.y + 7, 4, 0, Math.PI * 2);
      ctx.fill();
      ctx.fillStyle = '#000';
      ctx.beginPath();
      ctx.arc(50 + 21, bird.y + 7, 2, 0, Math.PI * 2);
      ctx.fill();

      // HUD
      MGAPI.text(ctx, `🐦 ${score} / ${WIN_PIPES}`, 8, 14,
        { align: 'left', size: 13, color: theme.primary });

      if (!started) {
        MGAPI.text(ctx, 'Klicken oder Leertaste', W / 2, H / 2 + 40,
          { size: 13, color: 'rgba(255,255,255,0.7)' });
      }

      if (dead) {
        MGAPI.resultScreen(ctx, W, H, score >= WIN_PIPES,
          score >= WIN_PIPES ? `${score} Hindernisse geschafft!` : `Nur ${score} — flieg weiter!`);
      }
    }

    raf = requestAnimationFrame(loop);

    return {
      stop() {
        stopped = true;
        cancelAnimationFrame(raf);
        clearTimeout(endTimer);
        document.removeEventListener('keydown', onKey);
        canvas.removeEventListener('click', jump);
      },
    };
  }

  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, winPipes: 3 }, won => MGAPI.onResult(won)); }

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

})();