/**
 * Created by PengLing on 2018/10/23.
 */
'use strict';

const request = require('superagent');
const parse = require('async-busboy');
const path = require('path');

const UploadPath = {
    project: [".txt", ".dwg", ".doc", ".docx", ".xls", ".xlsx", ".pdf", ".png", ".jpg"],
    report: [".doc", ".docx", ".xls", ".xlsx", ".pdf"],
    data: [".txt", ".xls", ".xlsx"],
    image: [".png", ".jpg", ".svg"],
    three: [".js"],
    video: [".mp4"]
};

module.exports = {
    entry: function (app, router, opts) {
        let download_ = async function (ctx, next) {
            const { fetchUrl } = opts.qiniu;
            if (ctx.path && ctx.path.includes(fetchUrl)) {
                try {
                    const { filename } = ctx.request.query;
                    const fkey = decodeURI(ctx.path.slice(fetchUrl.length + 1)).replace(/\.json$/, '.js');
                    if (ctx.path) {
                        const extNames = ctx.path.split('.');
                        app.fs.logger.log('info', 'extNames', extNames);
                        if (extNames.length > 0) {
                            let fileType = extNames[extNames.length - 1].toLowerCase();
                            if (fileType === 'pdf') {
                                ctx.type = 'application/pdf';
                                app.fs.logger.log('info', 'application/pdf', fileType);
                            }
                        }
                    }
                    const publicDownloadUrl = await app.fs.attachment.download(fkey);
                    ctx.status = 200;
                    if (filename) ctx.attachment(filename);
                    ctx.body = request.get(publicDownloadUrl);
                } catch (err) {
                    ctx.fs.logger.error(err);
                    ctx.status = 404;
                    ctx.body = { error: 'file not found.' }
                }
            } else {
                await next();
            }
        }

        async function upload(ctx, next) {
            let fkey = null;
            try {
                const { p } = ctx.params;
                const { files } = await parse(ctx.req);
                const file = files[0];
                const extname = path.extname(file.filename).toLowerCase();
                // if (!UploadPath[p]) {
                //     ctx.status = 400;
                //     ctx.body = JSON.stringify({ error: '附件存放的文件夹名称无效' });
                //     return;
                // } else if (UploadPath[p].indexOf(extname) < 0) {
                //     ctx.status = 400;
                //     ctx.body = JSON.stringify({ error: '文件格式无效' });
                //     return;
                // } else {
                // const fileInfo = await ctx.app.fs.attachment.upload(file, { uploadPath: p });
                const fileInfo = await ctx.app.fs.attachment.upload(file);
                fkey = fileInfo.key;
                ctx.body = { uploaded: fkey };
                // }
            } catch (err) {
                ctx.status = 500;
                ctx.fs.logger.error(err);
                ctx.body = { err: 'upload error.' };
            }
        }

        async function download(ctx, next) {
            try {
                const { fetchUrl } = opts.qiniu;
                const { src, filename } = ctx.query;
                const fkey = src.replace(/\.json$/, '.js');
                const publicDownloadUrl = await ctx.app.fs.attachment.download(fkey);
                if (filename) { // download
                    ctx.attachment(filename);
                } else { // display
                    if (/\.(png)|(jpg)|(jpeg)|(gif)$/g.test(src.toLowerCase())) ctx.type = 'image/png';
                };
                ctx.status = 200;
                ctx.body = request.get(publicDownloadUrl);
            } catch (err) {
                ctx.fs.logger.error(`path: ${ctx.path}, error: ${err}`);
                ctx.status = 400;
                ctx.body = { name: 'FindError', message: '附件下载失败' }
            }
        }

        let remove = async function (ctx, next) {
            try {
                const fkeys = ctx.request.body;
                for (let index = 0; index < fkeys.length; index++) {
                    await app.fs.attachment.remove(fkeys[index]);
                }
                ctx.status = 200;
                ctx.body = fkeys;
            } catch (err) {
                ctx.status = 500;
                ctx.fs.logger.error(err);
                ctx.body = { err: 'upload cleanup error.' };
            }
        }

        const getResourceRoot = async function (ctx) {
            const { domain } = opts.qiniu;

            ctx.status = 200;
            ctx.body = { root: domain };
        }

        router.use(download_);
        router.post('/_upload/attachments/:p', upload);
        router.get('/_upload/attachments', download);
        router.post('/_upload/remove/attachments', remove);
        router.get('/_resource/root', getResourceRoot);
    }
}