var fs = require("fs");
var Imap = require("imap"),
  inspect = require("util").inspect;

var imap = new Imap(config.imap);
const persist = require("./lib/persist");
const emails = persist("data/emails.json");

function openInbox(cb) {
  imap.openBox("INBOX", true, cb);
}

setInterval(() => {
  imap.once("ready", function() {
    openInbox(function(err, box) {
      if (err) throw err;
      var f = imap.seq.fetch(`${box.messages.total - 5}:*`, {
        bodies: ["TEXT"],
        struct: true
      });
      f.on("message", function(msg, seqno) {
        var prefix = "(#" + seqno + ") ";
        msg.on("body", function(stream, info) {
          var buffer = "";
          stream.on("data", function(chunk) {
            //stream.pipe(fs.createWriteStream('msg-' + seqno + '-body.txt', {flags:'a+'}));
            buffer += chunk.toString("utf8");
          });
          stream.once("end", async function() {
            if (!emails[seqno] && buffer.includes(config.imap.secret)) {
              let amount = buffer.replace(/.*\$(.*)\.\d\d \(CAD\).*/gms, "$1");
              emails[seqno] = amount;
              console.log(
                seqno,
                buffer.replace(/.*\$(.*)\.\d\d \(CAD\).*/gms, "$1")
              );

              try {
                await db.transaction(async transaction => {
                  const account = await db.Account.findOne({
                    where: {
                      user_id: config.imap.user_id,
                      asset: config.liquid.btcasset,
                      pubkey: null
                    },
                    include: {
                      model: db.User,
                      as: "user",
                    },
                    lock: transaction.LOCK.UPDATE,
                    transaction
                  });

                  let { user } = account;

                  let rate = app.get("rates")["CAD"];
                  console.log(rate);

                  await account.increment({ balance: amount }, { transaction });
                  let payment = await db.Payment.create({
                    account_id: account.id,
                    user_id: account.user_id,
                    hash: `Interac deposit: ${amount} CAD`,
                    amount: Math.round((amount / rate) * 100000000),
                    currency: "CAD",
                    rate,
                    received: true,
                    tip: 0,
                    confirmed: true,
                    address: "",
                    network: "COINOS"
                  });
                  payment = payment.get({ plain: true });
                  payment.account = account.get({ plain: true });

                  emit(user.username, "account", account);
                  emit(user.username, "payment", payment);
                });
              } catch (e) {
                console.log(e);
              }
            }
          });
        });
        msg.once("end", function() {
          // console.log(prefix + 'Finished');
        });

        imap.seq.addFlags(seqno, ["Seen"]);
      });
      f.once("error", function(err) {
        console.log("Fetch error: " + err);
      });
      f.once("end", function() {
        imap.end();
      });
    });
  });

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

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

  imap.connect();
}, 30000);