import { GameHostScene, spawnEffect } from "boardgame-phaser";

import type { OnitamaState, Pawn } from "@/game/onitama";
import type { HighlightData } from "@/spawners/HighlightSpawner";
import type { OnitamaUIState } from "@/state";
import type { MutableSignal } from "boardgame-core";
import type Phaser from "phaser";

import {
  COLORS,
  FONTS,
  MENU_BUTTON,
  TEXT_POSITION,
  VISUAL,
  getBoardCenter,
  getCardLabelPosition,
  colorToStr,
  createWinnerPulseTween,
} from "@/config";
import { prompts } from "@/game/onitama";
import {
  PawnSpawner,
  CardSpawner,
  BOARD_OFFSET,
  CELL_SIZE,
  BOARD_SIZE,
  boardToScreen,
  HighlightSpawner,
} from "@/spawners";
import {
  createUIState,
  clearSelection,
  selectPiece,
  selectCard,
} 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();
  private menuButtonContainer!: Phaser.GameObjects.Container;
  private menuButtonBg!: Phaser.GameObjects.Rectangle;
  private menuButtonText!: Phaser.GameObjects.Text;

  // 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(
      TEXT_POSITION.infoX,
      BOARD_OFFSET.y,
      "",
      FONTS.info,
    );

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

    // Input handling
    this.setupInput();

    // Menu button
    this.createMenuButton();

    // Start the game
    this.gameHost.start();
  }

  private createCardLabels(): void {
    // Red cards label - 棋盘下方
    const redPos = getCardLabelPosition("red");
    const redLabel = this.add
      .text(redPos.x, redPos.y, "RED", {
        ...FONTS.cardLabel,
        color: colorToStr(COLORS.red),
      })
      .setOrigin(redPos.originX, redPos.originY);
    this.cardLabelContainers.set("red", redLabel);

    // Black cards label - 棋盘上方
    const blackPos = getCardLabelPosition("black");
    const blackLabel = this.add
      .text(blackPos.x, blackPos.y, "BLACK", {
        ...FONTS.cardLabel,
        color: colorToStr(COLORS.black),
      })
      .setOrigin(blackPos.originX, blackPos.originY);
    this.cardLabelContainers.set("black", blackLabel);
  }

  private updateInfoText(): void {
    const currentPlayer = this.state.currentPlayer;

    if (this.state.winner) {
      this.infoText.setText(`${this.state.winner} wins!`);
    } else {
      this.infoText.setText(`Turn ${this.state.turn + 1}\n\n${currentPlayer}`);
    }
  }

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

    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(
      TEXT_POSITION.titleX,
      TEXT_POSITION.titleY,
      "Onitama",
      FONTS.title,
    );
  }

  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;
  }

  /** 创建菜单按钮 */
  private createMenuButton(): void {
    this.menuButtonBg = this.add
      .rectangle(
        MENU_BUTTON.x,
        MENU_BUTTON.y,
        MENU_BUTTON.width,
        MENU_BUTTON.height,
        COLORS.menuButton,
      )
      .setInteractive({ useHandCursor: true });

    this.menuButtonText = this.add
      .text(MENU_BUTTON.x, MENU_BUTTON.y, "Menu", FONTS.menuButton)
      .setOrigin(0.5);

    this.menuButtonContainer = this.add.container(
      MENU_BUTTON.x,
      MENU_BUTTON.y,
      [this.menuButtonBg, this.menuButtonText],
    );

    this.menuButtonBg.on("pointerover", () => {
      this.menuButtonBg.setFillStyle(COLORS.menuButtonHover);
    });

    this.menuButtonBg.on("pointerout", () => {
      this.menuButtonBg.setFillStyle(COLORS.menuButton);
    });

    this.menuButtonBg.on("pointerdown", () => {
      this.goToMenu();
    });
  }

  /** 跳转到菜单场景 */
  private async goToMenu(): Promise<void> {
    await this.sceneController.launch("MenuScene");
  }

  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 center = getBoardCenter();
    const boardWidth = BOARD_SIZE * CELL_SIZE;
    const boardHeight = BOARD_SIZE * CELL_SIZE;

    const bg = this.add
      .rectangle(
        center.x,
        center.y,
        boardWidth,
        boardHeight,
        COLORS.overlayBg,
        VISUAL.overlayAlpha,
      )
      .setInteractive({ useHandCursor: true });

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

    this.winnerOverlay.add(bg);

    const winText = this.add
      .text(center.x, center.y, text, FONTS.winner)
      .setOrigin(0.5);

    this.winnerOverlay.add(winText);

    createWinnerPulseTween(this, winText);
  }
}