export type MessageAction =
    | "GET_CRAWL_STATE"  // 获取爬虫的当前状态
    | "START_CRAWL" // 开始爬取

interface BackgroundMessage<T = any> {
    action: MessageAction; // 标识要执行的操作
    payload?: T;    // 附带的数据
}

interface BackgroundResponse<T = any> {
    data: T | null
}

/**
 * 定义发送给 Background Script 的消息类型
 */
export function sendBackgroundMessage<T>(data: BackgroundMessage): Promise<BackgroundResponse<T>> {
    // 检查是否在 Chrome 扩展环境中运行
    if (typeof chrome === 'undefined' || !chrome.runtime?.sendMessage) {
        return Promise.resolve({data: null});
    }

    return chrome.runtime.sendMessage(data);
}