const uniID = require('uni-id-common');
const db = uniCloud.database();

// 密钥不要硬编码在源码里：请在 uniCloud 控制台为本云函数配置环境变量
// （或使用 uni-config-center 统一管理），否则源码一旦外泄等于存储桶失守。
const QINIU_DOMAIN = process.env.QINIU_DOMAIN || "qnycdn.mymoyu.top";
const QINIU_BUCKET = process.env.QINIU_BUCKET || "dc-qiniu-alipay-env-00jxt5y29hrd-85e";
const QINIU_SECRET = process.env.QINIU_BUCKET_SECRET || "";

const extStorageManager = uniCloud.getExtStorageManager({
	provider: "qiniu",
	domain: QINIU_DOMAIN,
	bucketName: QINIU_BUCKET,
	bucketSecret: QINIU_SECRET
});

module.exports = {
	_before: function() {

	},
	async getUploadFileOptions(data = {}) {
		const { errCode } = await uniID.createInstance({ context: this.getClientInfo() }).checkToken(this.getUniIdToken());
		if (errCode) throw new Error('请先登录后再上传文件');
		let {
			cloudPath
		} = data;
		console.log(data);
		let uploadFileOptionsRes = extStorageManager.getUploadFileOptions({
			cloudPath: `${cloudPath}`,
			allowUpdate: false,
		});
		return uploadFileOptionsRes;
	},
	async getTempFileURL(data = {}) {
		let {
			src
		} = data;
		// 列表页的缩略图对未登录用户也要可见，所以这里不做登录校验，
		// 但必须限定只为本站存储协议的地址签发，避免被当成任意 URL 的签名代理。
		if (typeof src !== 'string' || !/^(qiniu|cloud):\/\//.test(src)) {
			throw new Error('不支持的文件地址');
		}
		let res = extStorageManager.getTempFileURL({
			fileList: [src], // 文件地址列表
		});
		return res;
	},
	// // 下载文件
	// async downloadFile(data = {}) {
	// 	let {
	// 		fileID,
	// 		domain,
	// 	} = data;
	// 	const extStorageManager = uniCloud.getExtStorageManager({
	// 		provider, // 扩展存储供应商
	// 		domain, // 自定义域名
	// 	});
	// 	let res = extStorageManager.downloadFile({
	// 		fileID
	// 	});
	// 	return res;
	// },
	// // 删除文件
		async deleteFile(data = {}) {
			const payload = await uniID.createInstance({ context: this.getClientInfo() }).checkToken(this.getUniIdToken());
			if (payload.errCode) throw new Error('请先登录');
			const fileList = Array.isArray(data.fileList) ? data.fileList.filter(Boolean) : [];
			if (!fileList.length) throw new Error('缺少文件地址');
			if ((payload.role || []).includes('admin')) {
				return extStorageManager.deleteFile({ fileList });
			}

			const articleId = data.article_id || data.articleId;
			if (!articleId) throw new Error('普通用户删除文件必须提供文章 id');
			const articleRes = await db.collection('uni-cms-articles').doc(articleId).field({ user_id: true, cmsLst: true, thumbnail: true }).get();
			const article = articleRes.data && articleRes.data[0];
			if (!article || article.user_id !== payload.uid) throw new Error('无权删除该文章文件');
			const refs = JSON.stringify(article);
			if (fileList.some(file => !refs.includes(file))) throw new Error('文件不是该文章引用资源');
			return extStorageManager.deleteFile({ fileList });
		}

}