import Phaser from 'phaser';
import { ReactiveScene } from 'boardgame-phaser';
import { generatePointCrawlMap, type PointCrawlMap, MapNodeType } from 'boardgame-core/samples/slay-the-spire-like';

const NODE_COLORS: Record<MapNodeType, number> = {
  [MapNodeType.Start]: 0x44aa44,
  [MapNodeType.Combat]: 0xcc4444,
  [MapNodeType.Event]: 0xaaaa44,
  [MapNodeType.Elite]: 0xcc44cc,
  [MapNodeType.Shelter]: 0x44cccc,
  [MapNodeType.NPC]: 0x4488cc,
  [MapNodeType.Boss]: 0xcc8844,
};

const NODE_LABELS: Record<MapNodeType, string> = {
  [MapNodeType.Start]: '起点',
  [MapNodeType.Combat]: '战斗',
  [MapNodeType.Event]: '事件',
  [MapNodeType.Elite]: '精英',
  [MapNodeType.Shelter]: '篝火',
  [MapNodeType.NPC]: 'NPC',
  [MapNodeType.Boss]: 'Boss',
};

export class MapViewerScene extends ReactiveScene {
  private map: PointCrawlMap | null = null;
  private seed: number = Date.now();

  // Layout constants
  private readonly LAYER_HEIGHT = 100;
  private readonly NODE_SPACING = 120;
  private readonly NODE_RADIUS = 25;

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

  create(): void {
    super.create();
    this.drawMap();
    this.createControls();
  }

  private drawMap(): void {
    this.children.removeAll();
    this.map = generatePointCrawlMap(this.seed);

    const { width, height } = this.scale;
    const graphics = this.add.graphics();

    // Draw edges first
    graphics.lineStyle(2, 0x666666);
    for (const [nodeId, node] of this.map.nodes) {
      const posX = this.getNodeX(node, width);
      const posY = this.getNodeY(node, height);

      for (const childId of node.childIds) {
        const child = this.map.nodes.get(childId);
        if (child) {
          const childX = this.getNodeX(child, width);
          const childY = this.getNodeY(child, height);
          graphics.lineBetween(posX, posY, childX, childY);
        }
      }
    }

    // Draw nodes
    for (const [nodeId, node] of this.map.nodes) {
      const posX = this.getNodeX(node, width);
      const posY = this.getNodeY(node, height);
      const color = NODE_COLORS[node.type as MapNodeType] ?? 0x888888;

      // Node circle
      graphics.fillStyle(color);
      graphics.fillCircle(posX, posY, this.NODE_RADIUS);
      graphics.lineStyle(2, 0xffffff);
      graphics.strokeCircle(posX, posY, this.NODE_RADIUS);

      // Node label
      const label = NODE_LABELS[node.type as MapNodeType] ?? node.type;
      this.add.text(posX, posY, label, {
        fontSize: '12px',
        color: '#ffffff',
      }).setOrigin(0.5);

      // Encounter name (if available)
      if ('encounter' in node && node.encounter) {
        this.add.text(posX, posY + this.NODE_RADIUS + 10, (node as any).encounter.name ?? '', {
          fontSize: '10px',
          color: '#cccccc',
        }).setOrigin(0.5);
      }
    }

    // Title
    this.add.text(width / 2, 30, `Map Viewer (Seed: ${this.seed})`, {
      fontSize: '24px',
      color: '#ffffff',
      fontStyle: 'bold',
    }).setOrigin(0.5);

    // Legend
    this.drawLegend(20, height - 200);
  }

  private getNodeX(node: any, sceneWidth: number): number {
    const layer = this.map!.layers[node.layerIndex];
    const nodeIndex = layer.nodeIds.indexOf(node.id);
    const totalNodes = layer.nodeIds.length;
    const layerWidth = (totalNodes - 1) * this.NODE_SPACING;
    const startX = sceneWidth / 2 - layerWidth / 2;
    return startX + nodeIndex * this.NODE_SPACING;
  }

  private getNodeY(node: any, sceneHeight: number): number {
    return 80 + node.layerIndex * this.LAYER_HEIGHT;
  }

  private drawLegend(x: number, y: number): void {
    const graphics = this.add.graphics();
    graphics.fillStyle(0x222222, 0.8);
    graphics.fillRect(x, y, 150, 180);

    let offsetY = y + 15;
    this.add.text(x + 10, offsetY, '图例:', {
      fontSize: '14px',
      color: '#ffffff',
      fontStyle: 'bold',
    });
    offsetY += 25;

    for (const [type, color] of Object.entries(NODE_COLORS)) {
      graphics.fillStyle(color);
      graphics.fillCircle(x + 20, offsetY, 8);
      this.add.text(x + 40, offsetY - 5, NODE_LABELS[type as MapNodeType], {
        fontSize: '12px',
        color: '#ffffff',
      });
      offsetY += 22;
    }
  }

  private createControls(): void {
    const { width, height } = this.scale;

    // Back button
    this.createButton('返回菜单', 100, 40, () => {
      this.scene.start('IndexScene');
    });

    // Regenerate button
    this.createButton('重新生成', width - 120, 40, () => {
      this.seed = Date.now();
      this.drawMap();
      this.createControls();
    });
  }

  private createButton(label: string, x: number, y: number, onClick: () => void): void {
    const buttonWidth = 140;
    const buttonHeight = 36;

    const bg = this.add.rectangle(x, y, buttonWidth, buttonHeight, 0x444466)
      .setStrokeStyle(2, 0x7777aa)
      .setInteractive({ useHandCursor: true });

    const text = this.add.text(x, y, label, {
      fontSize: '16px',
      color: '#ffffff',
    }).setOrigin(0.5);

    bg.on('pointerover', () => {
      bg.setFillStyle(0x555588);
      text.setScale(1.05);
    });

    bg.on('pointerout', () => {
      bg.setFillStyle(0x444466);
      text.setScale(1);
    });

    bg.on('pointerdown', onClick);
  }
}