// BOOKQUOY — controller support (PS5 DualSense over Bluetooth, or anything
// exposing the standard Gamepad mapping). Zero new input paths: the pad
// synthesizes the SAME KeyboardEvents the keyboard produces, so every trick,
// variant, and menu action flows through the one proven handler in main.js.
//
//   left stick / dpad   steer · up = push + up-variants · down = brake/varials
//   R2                  push
//   CROSS               ollie / bunnyhop / hop off a grind   (Space)
//   SQUARE              kickflip | barspin                   (J)
//   CIRCLE              heelflip | tailwhip                  (K)
//   TRIANGLE            pop shove | x-up                     (L)
//   R1 tre flip · L1 fs shove · L2 hardflip
//   OPTIONS             start / run it back (Enter) · CREATE reset (R)

const DEAD = 0.3;
const BTN = { 0: 'Space', 1: 'KeyK', 2: 'KeyJ', 3: 'KeyL', 4: 'KeyF', 5: 'KeyT',
              6: 'KeyH', 8: 'KeyR', 9: 'Enter', 12: 'ArrowUp', 13: 'ArrowDown',
              14: 'ArrowLeft', 15: 'ArrowRight' };

export class Pad {
  constructor(onConnect) {
    this.held = new Set();
    this.index = null;
    addEventListener('gamepadconnected', e => {
      this.index = e.gamepad.index;
      if (onConnect) onConnect(e.gamepad.id);
    });
    addEventListener('gamepaddisconnected', e => {
      if (e.gamepad.index === this.index) this.index = null;
      this._sync(new Set());               // release everything, no stuck keys
    });
  }

  _gp() {
    const pads = navigator.getGamepads ? navigator.getGamepads() : [];
    if (this.index !== null && pads[this.index]) return pads[this.index];
    for (const p of pads) if (p) { this.index = p.index; return p; }
    return null;
  }

  poll() {
    const gp = this._gp();
    if (!gp) return;
    const want = new Set();
    const ax = gp.axes[0] || 0, ay = gp.axes[1] || 0;
    if (ax < -DEAD) want.add('ArrowLeft');
    if (ax > DEAD) want.add('ArrowRight');
    if (ay < -DEAD) want.add('ArrowUp');
    if (ay > DEAD) want.add('ArrowDown');
    if ((gp.buttons[7]?.value || 0) > 0.15) want.add('KeyW');       // R2 push
    for (const [i, code] of Object.entries(BTN)) {
      const b = gp.buttons[+i];
      if (b && (b.pressed || b.value > 0.5)) want.add(code);
    }
    this._sync(want);
  }

  _sync(want) {
    for (const code of want)
      if (!this.held.has(code)) {
        this.held.add(code);
        dispatchEvent(new KeyboardEvent('keydown', { code }));
      }
    for (const code of [...this.held])
      if (!want.has(code)) {
        this.held.delete(code);
        dispatchEvent(new KeyboardEvent('keyup', { code }));
      }
  }

  rumble(strong = 0.8, weak = 0.4, ms = 180) {
    const gp = this._gp();
    gp?.vibrationActuator?.playEffect?.('dual-rumble',
      { duration: ms, strongMagnitude: strong, weakMagnitude: weak });
  }
}