import config from "config";
import { emit } from "lib/sockets";
import store from "lib/store";
import { callWebhook } from "lib/webhooks";
import { v4 } from "uuid";
import { notify } from "lib/notifications";
import { l, err } from "lib/logging";
import { fail } from "lib/utils";

const { HOSTNAME: hostname } = process.env;

export default async (
  { amount, address, payreq, unconfidential, asset, memo, username, tip },
  user
) => {
  amount = parseInt(amount);

  if (!asset) asset = config.liquid.btcasset;

  if (!amount || amount < 0) fail("Amount must be greater than zero");

  return db.transaction(async transaction => {
    let account;
    if (user.account.asset === asset && !user.account.pubkey) {
      account = await db.Account.findOne({
        where: {
          id: user.account.id,
          pubkey: null
        },
        lock: transaction.LOCK.UPDATE,
        transaction
      });
    } else {
      account = await db.Account.findOne({
        where: {
          user_id: user.id,
          asset,
          pubkey: null
        },
        lock: transaction.LOCK.UPDATE,
        transaction
      });
    }

    if (!account) throw new Error("Account not found");

    if (account.balance < amount) {
      throw new Error("Insufficient funds");
    }

    let fee = 0;

    await account.decrement({ balance: amount }, { transaction });
    await account.reload({ transaction });

    let params, recipient, payment;

    if (username) {
      recipient = await db.User.findOne(
        {
          where: { username },
          include: {
            model: db.Account,
            as: "account"
          }
        },
        { transaction }
      );

      params = {
        where: { user_id: recipient.id },
        order: [["id", "DESC"]]
      };
      if (address) params.where.address = address;
      else if (payreq) params.where.text = payreq;
      let invoice = (address || payreq) && (await db.Invoice.findOne(params));

      let a2;
      let acc = {
        user_id: recipient.id,
        asset,
        pubkey: null
      };

      if (recipient.account.asset === asset && !recipient.account.pubkey)
        a2 = recipient.account;
      else {
        a2 = await db.Account.findOne({
          where: acc,
          lock: transaction.LOCK.UPDATE,
          transaction
        });
      }

      if (a2) {
        await a2.increment({ balance: amount }, { transaction });
        await a2.reload({ transaction });
      } else {
        let name = asset.substr(0, 6);
        let domain;
        let ticker = asset.substr(0, 3).toUpperCase();
        let precision = 8;

        if (store.assets[asset]) {
          ({ domain, ticker, precision, name } = store.assets[asset]);
        } else {
          const existing = await db.Account.findOne({
            where: {
              asset
            },
            order: [["id", "ASC"]],
            limit: 1,
            lock: transaction.LOCK.UPDATE,
            transaction
          });

          if (existing) {
            ({ domain, ticker, precision, name } = existing);
          }
        }

        acc = { ...acc, ...{ domain, ticker, precision, name } };
        acc.balance = amount;
        acc.pending = 0;
        acc.network = "liquid";
        a2 = await db.Account.create(acc, { transaction });
      }

      params = {
        amount,
        account_id: a2.id,
        user_id: recipient.id,
        rate: store.rates[recipient.currency],
        currency: recipient.currency,
        confirmed: true,
        hash: `#${v4().substr(0, 6)} Payment from ${user.username}`,
        memo,
        network: "COINOS",
        received: true,
        with_id: user.id
      };

      if (invoice) {
        let { tip } = invoice;
        params.invoice_id = invoice.id;
        if (tip) {
          params.tip = tip;
          params.amount -= tip;
        }

        await invoice.increment({ received: amount }, { transaction });
        await invoice.reload({ transaction });
      }

      let p2 = await db.Payment.create(params, { transaction });

      p2 = p2.get({ plain: true });
      p2.account = a2.get({ plain: true });
      if (invoice) p2.invoice = invoice.get({ plain: true });

      emit(recipient.username, "payment", p2);
      emit(recipient.username, "account", p2.account);

      l("received internal", recipient.username, amount);
      notify(recipient, `Received ${amount} ${a2.ticker} sats`);
      callWebhook(invoice, p2);
    }

    params = {
      amount: -amount,
      account_id: account.id,
      memo,
      user_id: user.id,
      rate: store.rates[user.currency],
      currency: user.currency,
      confirmed: true,
      with_id: recipient && recipient.id,
      hash: `#${v4().substr(0, 6)} ${
        username ? `Payment to ${username}` : "Internal Transfer"
      }`,
      network: "COINOS"
    };

    if (!username) {
      l("creating redeemable payment");
      params.redeemcode = v4();
      params.hash = `${hostname}/redeem/${params.redeemcode}`;
    }

    payment = await db.Payment.create(params, { transaction });

    payment = payment.get({ plain: true });
    payment.account = account.get({ plain: true });

    l("sent internal", user.username, -payment.amount);

    emit(user.username, "payment", payment);
    emit(user.username, "account", account);

    return payment;
  });
};