// import { v4 as uuidv4, v6 as uuidv6 } from 'uuid';
const uuid = require('uuid');
// const bcrypt = require('bcryptjs');
const cryptojs = require('crypto-js');
const e = require('express');
const fs = require('fs');
const db = require('./db');
const moment = require("moment");
const vars = require('./vars');

module.exports.sendfile = (fileName, response) => {
    const filePath = "./files/"+fileName; 
    fs.exists(filePath, function (exists) {
        if (exists) {
            response.writeHead(200, {
                "Content-Type": "application/octet-stream",
                "Content-Disposition": "attachment; filename=" + fileName
            });
            fs.createReadStream(filePath).pipe(response);
            return;
        }
        response.writeHead(400, { "Content-Type": "text/plain" });
        response.end("ERROR File does not exist");
    });
}

// module.exports.check_sid = (Cookies, callback) =>{
//     let uuid = Cookies["uuid"];
//     let sid = Cookies["sid"];
//     // console.log(uuid,sid);
//     db.gv("users","uuid",`'${uuid}'`,(udata)=>{ udata = udata[0];
//         // console.log(udata);
//         db.gv("sids","uid",udata["id"],(rdata)=>{
//             let valid = "";
//             rdata.forEach(rec => {
//                 if (rec["sid"] == sid){
//                     valid = rec["sid"];
//                     return;
//                 }
//             });
//             if(valid != ""){
//                 callback(true,udata);
//             }
//             else{
//                 callback(false,udata);
//             }
//         });
//     })
// }

module.exports.sid = (cook,res,callback,auto = true)=>{
    let uuid = cook["uuid"];
    let sid = cook["sid"];
    if(cook["uuid"] != null && cook["sid"] != null){
        db.ggv("sids","`uid`","sid",`'${sid}'`,(sdata)=>{ sdata = sdata[0]
            // console.log(sdata);
            if(sdata != null){
                db.ggv("users","`uuid`,`id`","id",`'${sdata["uid"]}'`,(udata)=>{ udata = udata[0]
                    if (udata != null && udata["id"] == sdata["uid"] && uuid == udata["uuid"]){
                        callback(true);
                    }
                    else{
                        if(auto) res.send({out:"bad",err:"wrong"});
                        if(!auto) callback(false);
                    }
                });
            }
            else{
                if(auto) res.send({out:"bad",err:"expired"});
                if(!auto) callback(false);
            }
        });
    }else{
        if(auto) res.send({out:"bad",err:"nocr"});
        if(!auto) callback(false);
    }
}

module.exports.log = (message) =>{
    var date = moment().format('YYYY-MM-DD')
    var time = moment().format('hh:mm:ss')
    console.log(`${date}_${time}|${message}`);
    db.nr("logs","`date`,`time`,`log`",`'${date}','${time}','${message}'`);
}


module.exports.get_uuid = () =>{
    let unid = uuid.v4() + '%%' + uuid.v4() +'#'+(621);
    return unid;
}

module.exports.encrypt = (text,cipher) => {
    // return bcrypt.hashSync(password,bcrypt.genSaltSync());
    return cryptojs.AES.encrypt(text,cipher).toString();
}

module.exports.decrypt = (text,cipher) =>{
    const en = cryptojs.AES.decrypt(text,cipher);
    const de = en.toString(cryptojs.enc.Utf8);
    // console.log(de + "-dec");
    return de;
}