const Imap = require("imap");
const { simpleParser } = require("mailparser");
const inspect = require("util").inspect;
const saveMessage = require("./storeMessage").saveMessage;
const registerMessageInApp = require("../app/saveMessage").registerMessageInApp;
const imapConfig = require("./config.json").mail;

const fs = require("fs");
const { DEBUG } = require("../utils/debug");
const imap = new Imap({
    user: imapConfig.user,
    password: imapConfig.password,
    tlsOptions: { servername: "imap.gmail.com" },
    host: "imap.gmail.com",
    port: 993,
    tls: true,
});

// reset table;

let shouldReset = false;
// let shouldReset = true;

if (shouldReset) {
    const { execQuery, execQueryAsync } = require("../db/db");
    const query = "SELECT table_name FROM INFORMATION_SCHEMA.tables WHERE table_schema = 'mail'";
    execQueryAsync(query).then((results) => {
        execQuery("SET FOREIGN_KEY_CHECKS=0");
        results.map((table) => {
            execQuery("DELETE FROM " + table.table_name);
        });
    });
    return;
}

imap.once("ready", function () {
    const readOnly = true;
    imap.openBox("INBOX", readOnly, (err, box) => {
        // console.log(box); // uidvalidty uidnext, messages total and new
        // imap.search(["ALL"], function (err, results) {
        //     console.log(results[results.length - 1]);
        // });

        // const f = imap.fetch(970, {
        //     size: true,
        //     envelope: true,
        // });
        const promises = [];
        const mails = [];
        const f = imap.seq.fetch('1:10', {
            size: true,
            envelope: true
          });
        f.on("message", function (msg, seqno) {
            msg.once("attributes", (attrs) => {
                // todo find boxId
                const boxId = 1;
                mails.push(attrs);
                promises.push(saveMessage(attrs, boxId, imap));
            });
        });

        f.once("error", function (err) {
            DEBUG.log("Fetch error: " + err);
        });
        f.once("end", async function () {
            Promise.all(promises).then(async (res) => {
                DEBUG.log("Done fetching all messages!");
                for (let i = 0; i < mails.length; i++) {
                    await registerMessageInApp(res[i], mails[i]);
                }
            });
        });
        //    imap.end()
    });
});

imap.once("error", function (err) {
    console.log(err);
});

imap.once("end", function () {
    console.log("Connection ended");
});

imap.connect();

function isValidEmail(email) {
    // todo
    return true;
}

module.exports = {
    isValidEmail,
};