import Phaser from 'phaser';
import type { OnitamaState, Pawn } from '@/game/onitama';
import {getAvailableMoves, prompts} from '@/game/onitama';
import { GameHostScene } from 'boardgame-phaser';
import { spawnEffect } from 'boardgame-phaser';
import type { MutableSignal } from 'boardgame-core';
import {
  PawnSpawner, CardSpawner, BOARD_OFFSET, CELL_SIZE, CARD_WIDTH, CARD_HEIGHT, boardToScreen, BOARD_SIZE,
  HighlightSpawner
} from '@/spawners';
import type { HighlightData } from '@/spawners/HighlightSpawner';
import {createUIState, clearSelection, selectPiece, selectCard, createValidMoves} from '@/state';
import type { OnitamaUIState, ValidMove } from '@/state';

export class OnitamaScene extends GameHostScene<OnitamaState> {
  private boardContainer!: Phaser.GameObjects.Container;
  private gridGraphics!: Phaser.GameObjects.Graphics;
  private infoText!: Phaser.GameObjects.Text;
  private winnerOverlay?: Phaser.GameObjects.Container;
  private cardLabelContainers: Map<string, Phaser.GameObjects.Text> = new Map();
  
  // UI State managed by MutableSignal
  public uiState!: MutableSignal<OnitamaUIState>;

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

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

    // Create UI state signal
    this.uiState = createUIState();

    this.boardContainer = this.add.container(0, 0);
    this.gridGraphics = this.add.graphics();
    this.drawBoard();

    // Add spawners
    this.disposables.add(spawnEffect(new PawnSpawner(this)));
    this.disposables.add(spawnEffect(new CardSpawner(this)));
    this.disposables.add(spawnEffect(new HighlightSpawner(this)));

    // Create card labels
    this.createCardLabels();

    // Winner overlay effect
    this.addEffect(() => {
      const winner = this.state.winner;
      if (winner) {
        this.showWinner(winner);
      } else if (this.winnerOverlay) {
        this.winnerOverlay.destroy();
        this.winnerOverlay = undefined;
      }
    });

    // Info text
    this.infoText = this.add.text(
      BOARD_OFFSET.x + (BOARD_SIZE * CELL_SIZE) / 2,
      BOARD_OFFSET.y + BOARD_SIZE * CELL_SIZE + 30,
      '',
      {
        fontSize: '20px',
        fontFamily: 'Arial',
        color: '#4b5563',
      }
    ).setOrigin(0.5);

    // Update info text when UI state changes
    this.addEffect(() => {
      this.updateInfoText();
    });

    // Input handling
    this.setupInput();
  }

  private createCardLabels(): void {
    const boardLeft = BOARD_OFFSET.x;
    const boardTop = BOARD_OFFSET.y;
    const boardRight = BOARD_OFFSET.x + BOARD_SIZE * CELL_SIZE;

    // Red cards label
    const redLabel = this.add.text(
      boardLeft - CARD_WIDTH - 60 + CARD_WIDTH / 2,
      boardTop + 50 + 2 * (CARD_HEIGHT + 15) + 10,
      "RED's Cards",
      {
        fontSize: '16px',
        fontFamily: 'Arial',
        color: '#ef4444',
      }
    ).setOrigin(0.5, 0);
    this.cardLabelContainers.set('red', redLabel);

    // Black cards label
    const blackLabel = this.add.text(
      boardRight + 60 + CARD_WIDTH / 2,
      boardTop + 50 + 2 * (CARD_HEIGHT + 15) + 10,
      "BLACK's Cards",
      {
        fontSize: '16px',
        fontFamily: 'Arial',
        color: '#3b82f6',
      }
    ).setOrigin(0.5, 0);
    this.cardLabelContainers.set('black', blackLabel);

    // Spare card label
    const boardCenterX = boardLeft + (BOARD_SIZE * CELL_SIZE) / 2;
    const spareLabel = this.add.text(
      boardCenterX,
      boardTop - 50,
      'Spare Card',
      {
        fontSize: '16px',
        fontFamily: 'Arial',
        color: '#6b7280',
      }
    ).setOrigin(0.5, 0);
    this.cardLabelContainers.set('spare', spareLabel);
  }

  private updateInfoText(): void {
    const currentPlayer = this.state.currentPlayer;
    const selectedCard = this.uiState.value.selectedCard;
    const selectedPiece = this.uiState.value.selectedPiece;
    
    if (this.state.winner) {
      this.infoText.setText(`${this.state.winner} wins!`);
    } else if (!selectedCard) {
      this.infoText.setText(`${currentPlayer}'s turn - Select a card first`);
    } else if (!selectedPiece) {
      this.infoText.setText(`Card: ${selectedCard} - Select a piece to move`);
    } else {
      this.infoText.setText(`${currentPlayer}'s turn (Turn ${this.state.turn + 1})`);
    }
  }

  private drawBoard(): void {
    const g = this.gridGraphics;
    g.lineStyle(2, 0x6b7280);

    for (let i = 0; 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,
      'Onitama',
      {
        fontSize: '28px',
        fontFamily: 'Arial',
        color: '#1f2937',
      }
    ).setOrigin(0.5);
  }

  private setupInput(): void {
    // Board cell clicks
    for (let row = 0; row < BOARD_SIZE; row++) {
      for (let col = 0; col < BOARD_SIZE; col++) {
        const pos = boardToScreen(col, row);

        const zone = this.add.zone(pos.x, pos.y, CELL_SIZE, CELL_SIZE).setInteractive();

        zone.on('pointerdown', () => {
          if (this.state.winner) return;
          this.handleCellClick(col, row);
        });
      }
    }
  }

  private handleCellClick(x: number, y: number): void {
    const pawn = this.getPawnAtPosition(x, y);
    if(pawn?.owner !== this.state.currentPlayer){
      return;
    }
    selectPiece(this.uiState, x, y);
  }

  public onCardClick(cardId: string): void {
    // 只能选择当前玩家的手牌
    const currentPlayer = this.state.currentPlayer;
    const playerCards = currentPlayer === 'red' ? this.state.redCards : this.state.blackCards;
    
    if (!playerCards.includes(cardId)) {
      return;
    }

    selectCard(this.uiState, cardId);
  }

  public onHighlightClick(data: HighlightData): void {
    clearSelection(this.uiState);
    this.executeMove({
      card: data.card,
      fromX: data.fromX,
      fromY: data.fromY,
      toX: data.toX,
      toY: data.toY,
    });
  }

  private executeMove(move: { card: string; fromX: number; fromY: number; toX: number; toY: number }): void {
    const error = this.gameHost.tryAnswerPrompt(
      prompts.move,
      this.state.currentPlayer,
      move.card,
      move.fromX,
      move.fromY,
      move.toX,
      move.toY
    );
    if (error) {
      console.warn('Invalid move:', error);
    }
  }

  private getPawnAtPosition(x: number, y: number): Pawn | null {
    const key = `${x},${y}`;
    const pawnId = this.state.regions.board.partMap[key];
    return pawnId ? this.state.pawns[pawnId] : null;
  }

  private showWinner(winner: string): void {
    if (this.winnerOverlay) {
      this.winnerOverlay.destroy();
    }

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

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

    const bg = 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
    ).setInteractive({ useHandCursor: true });

    bg.on('pointerdown', () => {
      this.gameHost.start();
    });

    this.winnerOverlay.add(bg);

    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,
    });
  }
}