/**
 * 场景基类
 */
export default class BaseScene {
  constructor(main, params = {}) {
    this.main = main;
    this.params = params;
    this.screenWidth = main.screenWidth;
    this.screenHeight = main.screenHeight;
    this.scrollVelocity = 0;
  }

  // 初始化
  init() {}

  // 更新逻辑
  update() {}

  // 渲染
  render(ctx) {}

  // 触摸开始
  onTouchStart(e) {}

  // 触摸移动
  onTouchMove(e) {}

  // 触摸结束
  onTouchEnd(e) {}

  // 销毁
  destroy() {}

  // 绘制圆角矩形
  roundRect(ctx, x, y, width, height, radius) {
    ctx.beginPath();
    ctx.moveTo(x + radius, y);
    ctx.lineTo(x + width - radius, y);
    ctx.quadraticCurveTo(x + width, y, x + width, y + radius);
    ctx.lineTo(x + width, y + height - radius);
    ctx.quadraticCurveTo(x + width, y + height, x + width - radius, y + height);
    ctx.lineTo(x + radius, y + height);
    ctx.quadraticCurveTo(x, y + height, x, y + height - radius);
    ctx.lineTo(x, y + radius);
    ctx.quadraticCurveTo(x, y, x + radius, y);
    ctx.closePath();
  }

  // 绘制多行文本
  wrapText(ctx, text, x, y, maxWidth, lineHeight) {
    const lines = [];
    let currentLine = '';
    
    for (let i = 0; i < text.length; i++) {
      const char = text[i];
      if (char === '\n') {
        lines.push(currentLine);
        currentLine = '';
        continue;
      }
      
      const testLine = currentLine + char;
      const metrics = ctx.measureText(testLine);
      
      if (metrics.width > maxWidth && currentLine.length > 0) {
        lines.push(currentLine);
        currentLine = char;
      } else {
        currentLine = testLine;
      }
    }
    
    if (currentLine.length > 0) {
      lines.push(currentLine);
    }

    lines.forEach((line, index) => {
      ctx.fillText(line, x, y + index * lineHeight);
    });

    return lines.length;
  }
}