import { ScriptSlice, ScriptSliceType } from "@/app/service/domain/valueObject";

export function parseScriptEntity(text: string): ScriptSlice {
  const scriptSlice = new ScriptSlice(
    // 生成唯一ID，单次使用即可
    `${Date.now().toString(36)}${Math.random().toString(36).slice(2, 8)}`,
    ScriptSliceType.text,
    text,
    {}
  );
  return scriptSlice;
}

/**
 * @description 节流函数，限制函数在指定时间间隔内只执行一次
 * @param {Function} func - 需要被节流的函数
 * @param {number} delay - 节流时间间隔（毫秒）
 * @returns {Function} - 节流后的新函数
 * @throws {Error} - 如果参数类型不正确
 * @example
 * const throttledFn = throttle(() => { console.log('触发'); }, 1000);
 * window.addEventListener('resize', throttledFn);
 */
export function throttle<T extends (...args: any[]) => any>(
  func: T,
  delay: number = 100
): (...args: Parameters<T>) => void {
  if (typeof delay !== "number" || delay < 0) {
    throw new Error("throttle: 第二个参数必须是非负数");
  }
  let lastCall = 0;
  return (...args: Parameters<T>) => {
    const now = Date.now();
    if (now - lastCall >= delay) {
      lastCall = now;
      func(...args);
    }
  };
}
/**
 * 创建1920x1080屏幕适配的CSS样式
 * 自动计算缩放比例并应用到页面元素
 */
export function createScreenAdapter(): void {
  // 获取当前窗口尺寸
  const currentWidth = window.innerWidth;
  const currentHeight = window.innerHeight;
  // 计算缩放比例 (1920x1080)
  const wScale = currentWidth / 1920;
  const hScale = currentHeight / 1080;

  // 检查app节点是否存在
  const app = document.getElementById("app");
  if (!app) {
    console.error("未找到app节点");
    return;
  }
  (window as any).Scale = {
    wScale,
    hScale,
  };
  // 创建样式元素
  const style = document.createElement("style");

  // 设置CSS样式
  style.textContent = `
      body {
        #app {
          transform-origin: top left;
          transform: scale(${wScale}, ${hScale});
          width: 1920px;
          height: 1080px;
        }
      }
    `;

  // 将样式添加到head
  document.head.appendChild(style);
}

export const downloadVideo = async (url: string) => {
  try {
    const response = await fetch(url);
    const blob = await response.blob();
    const blobUrl = window.URL.createObjectURL(blob);
    const a = document.createElement('a');
    a.href = blobUrl;
    a.download = url.split('/').pop() || 'video.mp4';
    document.body.appendChild(a);
    a.click();
    document.body.removeChild(a);
    window.URL.revokeObjectURL(blobUrl);
  } catch (error) {
    console.error('下载视频失败:', error);
  }
};

/**
 * 下载所有视频
 * @param urls 视频URL列表
 */
export const downloadAllVideos = async (urls: string[]) => {
  for (const url of urls) {
    await downloadVideo(url);
  }
};

/**
 * 阿里云地址 七牛云地址 取首帧方式不一样
 * 发现 链接 包含 ‘aliyuncs.com’ 是阿里云地址
 * @param url 视频URL
 */
export const getFirstFrame = (url: string, width?: number) => {
  if (url.includes('aliyuncs.com')) {
    return url + '?x-oss-process=video/snapshot,t_1000,f_jpg' + `${width ? ',w_'+width : ''}`;
  } else {
    return url + '?vframe/jpg/offset/1' + `${width ? '/w/'+width : ''}`;
  }
}