import Phaser from 'phaser';
import type {TicTacToeState, TicTacToePart} from '@/game/tic-tac-toe';
import {ReadonlySignal} from "@preact/signals";
import {GameHostScene} from "@/scenes/GameHostScene";
import {spawnEffect, Spawner} from "@/utils/spawner";

const CELL_SIZE = 120;
const BOARD_OFFSET = { x: 100, y: 100 };
const BOARD_SIZE = 3;

export class GameScene extends GameHostScene<TicTacToeState> {
  private boardContainer!: Phaser.GameObjects.Container;
  private gridGraphics!: Phaser.GameObjects.Graphics;
  private turnText!: Phaser.GameObjects.Text;
  private winnerOverlay?: Phaser.GameObjects.Container;

  constructor() {
    super('GameScene');
  }

  create(): void {
    super.create();

    this.boardContainer = this.add.container(0, 0);
    this.gridGraphics = this.add.graphics();
    this.drawGrid();
    
    this.disposables.add(spawnEffect(new TicTacToePartSpawner(this, this.gameHost.state)));

    this.watch(() => {
      const winner = this.state.winner;
      if (winner) {
        this.showWinner(winner);
      }
    });

    this.watch(() => {
      const currentPlayer = this.state.currentPlayer;
      this.updateTurnText(currentPlayer);
    });

    this.setupInput();
  }

  private isCellOccupied(row: number, col: number): boolean {
    return !!this.state.board.partMap[`${row},${col}`];
  }

  private setupInput(): void {
    // todo
  }

  private drawGrid(): void {
    const g = this.gridGraphics;
    g.lineStyle(3, 0x6b7280);

    for (let i = 1; i < BOARD_SIZE; i++) {
      g.lineBetween(
        BOARD_OFFSET.x + i * CELL_SIZE,
        BOARD_OFFSET.y,
        BOARD_OFFSET.x + i * CELL_SIZE,
        BOARD_OFFSET.y + BOARD_SIZE * CELL_SIZE,
      );
      g.lineBetween(
        BOARD_OFFSET.x,
        BOARD_OFFSET.y + i * CELL_SIZE,
        BOARD_OFFSET.x + BOARD_SIZE * CELL_SIZE,
        BOARD_OFFSET.y + i * CELL_SIZE,
      );
    }

    g.strokePath();

    this.add.text(BOARD_OFFSET.x + (BOARD_SIZE * CELL_SIZE) / 2, BOARD_OFFSET.y - 40, 'Tic-Tac-Toe', {
      fontSize: '28px',
      fontFamily: 'Arial',
      color: '#1f2937',
    }).setOrigin(0.5);

    this.turnText = this.add.text(BOARD_OFFSET.x + (BOARD_SIZE * CELL_SIZE) / 2, BOARD_OFFSET.y + BOARD_SIZE * CELL_SIZE + 20, '', {
      fontSize: '20px',
      fontFamily: 'Arial',
      color: '#4b5563',
    }).setOrigin(0.5);

    this.updateTurnText(this.state.currentPlayer);
  }

  private updateTurnText(player: string): void {
    if (this.turnText) {
      this.turnText.setText(`${player}'s turn`);
    }
  }

  private showWinner(winner: string): void {
    // 清理旧的覆盖层防止叠加
    if (this.winnerOverlay) {
      this.winnerOverlay.destroy();
    }

    this.winnerOverlay = this.add.container();

    const text = winner === 'draw' ? "It's a draw!" : `${winner} wins!`;

    this.winnerOverlay.add(
      this.add.rectangle(
        BOARD_OFFSET.x + (BOARD_SIZE * CELL_SIZE) / 2,
        BOARD_OFFSET.y + (BOARD_SIZE * CELL_SIZE) / 2,
        BOARD_SIZE * CELL_SIZE,
        BOARD_SIZE * CELL_SIZE,
        0x000000,
        0.6,
      ),
    );

    const winText = this.add.text(
      BOARD_OFFSET.x + (BOARD_SIZE * CELL_SIZE) / 2,
      BOARD_OFFSET.y + (BOARD_SIZE * CELL_SIZE) / 2,
      text,
      {
        fontSize: '36px',
        fontFamily: 'Arial',
        color: '#fbbf24',
      },
    ).setOrigin(0.5);

    this.winnerOverlay.add(winText);

    this.tweens.add({
      targets: winText,
      scale: 1.2,
      duration: 500,
      yoyo: true,
      repeat: 1,
    });
  }
}

class TicTacToePartSpawner implements Spawner<TicTacToePart, Phaser.GameObjects.Text> {
  constructor(public readonly scene: GameScene, public readonly state: ReadonlySignal<TicTacToeState>) {}

  *getData() {
    for (const part of Object.values(this.state.value.parts)) {
      yield part;
    }
  }
  getKey(part: TicTacToePart): string {
    return part.id;
  }
  onUpdate(part: TicTacToePart, obj: Phaser.GameObjects.Text): void {
    const [xIndex, yIndex] = part.position;
    const x = xIndex * CELL_SIZE + BOARD_OFFSET.x;
    const y = yIndex * CELL_SIZE + BOARD_OFFSET.y;
    obj.x = x;
    obj.y = y;
  }
  onSpawn(part: TicTacToePart) {
    const [xIndex, yIndex] = part.position;
    const x = xIndex * CELL_SIZE + BOARD_OFFSET.x;
    const y = yIndex * CELL_SIZE + BOARD_OFFSET.y;
    const text = this.scene.add.text(x + CELL_SIZE / 2, y + CELL_SIZE / 2, part.player, {
      fontSize: '64px',
      fontFamily: 'Arial',
      color: part.player === 'X' ? '#3b82f6' : '#ef4444',
    }).setOrigin(0.5);

    // 添加落子动画
    text.setScale(0);
    this.scene.tweens.add({
      targets: text,
      scale: 1,
      duration: 200,
      ease: 'Back.easeOut',
    });

    return text;
  }
  
  onDespawn(obj: Phaser.GameObjects.Text) {
    obj.removedFromScene();
  }
}