const { SERVER_HOST, SERVER_PORT, MONGODB_URL, TEMP_PATH, SAVE_PATH, UPLOAD_SIZE_LIMIT } = require('./config')
const fs = require('fs')
const path = require('path')
const multer = require('multer')
const bcrypt = require('bcrypt')
const md5file = require('md5-file')
const express = require('express')
const mongoose = require('mongoose')
const Fileshare = require('./models/fileshare')
mongoose.connect(MONGODB_URL, (error) => {
    if (error) {
        console.error(error)
    } else {
        console.info('mongodb connected successfully')
    }
})
const app = express()
app.set('view engine', 'pug')
app.use(express.static('public'))
app.use(express.urlencoded({ extended: true }))
app.use(express.json())
app.get('/', (req, res) => {
    res.render('index')
})
const upload = multer({ dest: TEMP_PATH, limits: { fileSize: UPLOAD_SIZE_LIMIT } })
app.post('/upload', upload.single('file'), async (req, res) => {
    const file_temp_path = path.join(TEMP_PATH, req.file.filename)
    const md5 = await md5file(file_temp_path)
    const file_save_path = path.join(__dirname, SAVE_PATH, md5)
    if (!fs.existsSync(file_save_path)) {
        fs.cpSync(file_temp_path, file_save_path) // 复制文件到UPLOAD_PATH
    }
    fs.unlinkSync(file_temp_path) // 删除临时文件
    const file = {
        md5,
        size: req.file.size,
        encoding: req.file.encoding,
        mimetype: req.file.mimetype,
        filename: req.file.originalname,
        password: req.body.password ? await bcrypt.hash(req.body.password, 16) : '',
    }
    // 写入数据库
    const fileshare = new Fileshare(file)
    file.id = (await fileshare.save()).id
    console.table(file)
    res.status(201).render('index', { file })
})
const server = app.listen(SERVER_PORT, SERVER_HOST, () => {
    console.info(`server is running at http://${SERVER_HOST}:${SERVER_PORT}`)
})