// frontend/js/game.js
// Adaptation frontend de la logique de game.py en JavaScript

async function think(t) {
  return new Promise(resolve => setTimeout(resolve, 1000 * t));
}

class Wall {
  constructor() {
    this.tiles = Tile.generateAll();
    this.shuffle();
  }
  shuffle() {
    for (let i = this.tiles.length - 1; i > 0; i--) {
      const j = Math.floor(Math.random() * (i + 1));
      [this.tiles[i], this.tiles[j]] = [this.tiles[j], this.tiles[i]];
    }
  }
  draw() {
    return this.tiles.shift();
  }
  drawHand() {
    const handTiles = this.tiles.splice(0, 13);
    return new Hand(handTiles);
  }
}

class Hand {
  constructor(tiles) {
    this.tiles = tiles;
    this.draw = null;
  }
  drawTile(tile) {
    this.draw = tile;
  }
  discardTile(tileId) {
    let idx = this.tiles.findIndex(t => t.id === tileId);
    if (idx !== -1) {
      return this.tiles.splice(idx, 1)[0];
    }
    if (this.draw && this.draw.id === tileId) {
      const discarded = this.draw;
      this.draw = null;
      return discarded;
    }
    return null;
  }
  flatten() {
    if (this.draw) {
        this.tiles.push(this.draw);
        this.draw = null;
    }
  }
}

class Game {
  constructor(onUpdate) {
    this.wall = new Wall();
    this.handPlayer = this.wall.drawHand();
    this.discardPlayer = [];
    this.handsBots = [this.wall.drawHand(), this.wall.drawHand(), this.wall.drawHand()];
    this.discardsBots = [[], [], []];
    this.turn = 0;
    this.hasDraw = true;
    this.end = false;
    this.onUpdate = onUpdate || (() => {});
    // Est pioche une tuile
    const tile = this.wall.draw();
    if (tile) this.handPlayer.drawTile(tile);
    this.onUpdate(this);
  }

  drawTile(hand) {
    const tile = this.wall.draw();
    if (tile) hand.drawTile(tile);
  }

  putTile(hand, tileId) {
    const discarded = hand.discardTile(tileId);
    if (discarded) {
      this.wall.tiles.push(discarded);
      this.wall.shuffle();
    }
  }

  async nextTurn() {
    this.turn = (this.turn + 1) % 4;
    this.hasDraw = false;
    this.onUpdate(this);
    if (this.turn !== 0) {
      await this.botTurn();
    } else {
      this.drawTile(this.handPlayer);
      this.hasDraw = true;
      this.onUpdate(this);
    }
  }

  async botTurn() {
    const bot = this.handsBots[this.turn - 1];
    this.drawTile(bot);
    this.onUpdate(this); // Affiche la pioche
    await think(2);
    // Défausse une tuile aléatoire
    const idx = Math.floor(Math.random() * bot.tiles.length);
    const tileToDiscard = bot.tiles[idx];
    const discarded = bot.discardTile(tileToDiscard.id);
    bot.flatten()
    this.onUpdate(this); // Affiche la défausse
    await think(0.5);
    if (discarded) this.discardsBots[this.turn - 1].push(discarded);
    await this.nextTurn();
  }

  async discardTile(tileId) {
    if (this.turn === 0 && this.hasDraw) {
      const wasDraw = (this.handPlayer.draw && this.handPlayer.draw.id === tileId);
      const discarded = this.handPlayer.discardTile(tileId);
      // Si la tuile défaussée n'était pas draw, on intègre draw à la main avant le rendu
      if (!wasDraw) {
        this.handPlayer.flatten();
      }
      this.onUpdate(this); // Affiche la défausse
      if (discarded) this.discardPlayer.push(discarded);
      await this.nextTurn();
      return discarded;
    }
    return null;
  }
}

// Expose dans le scope global
window.Game = Game;
window.Hand = Hand;
window.Wall = Wall;