import { g, s } from "$lib/db";
import config from "$config";
import store from "$lib/store";
import { nada, pick, uniq, wait } from "$lib/utils";
import bcrypt from "bcrypt";
import jwt from "jsonwebtoken";
import { authenticator } from "otplib";
import whitelist from "$lib/whitelist";
import { l, err, warn } from "$lib/logging";
import { emit } from "$lib/sockets";
import register from "$lib/register";
import { requirePin } from "$lib/utils";
import got from "got";
import upload from "$lib/upload";

export default {
  upload,

  async me({ user }, res) {
    try {
      user.balance = await g(`balance:${user.id}`);
      res.send(pick(user, whitelist));
    } catch (e) {
      console.log("problem fetching user", e);
      res.code(500).send(e.message);
    }
  },

  async get({ params: { key } }, res) {
    try {
      if (key.startsWith("npub")) {
        key = Buffer.from(fromWords(decode(key).words)).toString("hex");
      }

      let user = await g(`user:${key}`);
      if (typeof user === "string") {
        user = await g(`user:${user}`);
      }

      if (!user && key.length === 64) {
        user = {
          username: key.substr(0, 6),
          pubkey: key,
          anon: true
        };
      }

      if (!user) return res.code(500).send("User not found");

      let whitelist = [
        "username",
        "banner",
        "profile",
        "address",
        "currency",
        "pubkey",
        "display",
        "prompt",
        "id"
      ];

      res.send(pick(user, whitelist));
    } catch (e) {
      console.log(e);
      res.code(500).send(e.message);
    }
  },

  async create(req, res) {
    try {
      const ip = req.headers["x-forwarded-for"] || req.socket.remoteAddress;
      let { cipher, pubkey, password, username, salt } = req.body.user;

      let user = {
        cipher,
        pubkey,
        password,
        username,
        salt
      };

      user = await register(user, ip, false);
      l("registered new user", username);
      res.send(pick(user, whitelist));
    } catch (e) {
      res.code(500).send(e.message);
    }
  },

  async disable2fa({ user, body: { token } }, res) {
    let { id, twofa, username, otpsecret } = user;
    if (twofa && !authenticator.check(token, otpsecret)) {
      return res.code(401).send("2fa required");
    }

    user.twofa = false;
    await s(`user:${id}`, user);
    emit(username, "user", user);
    emit(username, "otpsecret", user.otpsecret);
    l("disabled 2fa", username);
    res.send({});
  },

  async enable2fa({ user, body: { token } }, res) {
    let { id, otpsecret, username } = user;
    const isValid = authenticator.check(token, otpsecret);
    if (isValid) {
      user.twofa = true;
      await s(`user:${id}`, user);
      emit(username, "user", user);
    } else {
      return res.code(500).send("Invalid token");
    }

    l("enabled 2fa", username);
    res.send({});
  },

  async update({ user, body }, res) {
    l("updating user", user.username);

    let { confirm, password, pin, newpin, username } = body;

    if (user.pin && !(pin === user.pin)) throw new Error("Pin required");
    if (typeof newpin !== "undefined") user.pin = newpin;
    if (!user.pin) user.pin = null;

    let exists;
    if (username) exists = await g(`user:${username}`);

    let token;
    if (user.username !== username && exists) {
      err("username taken", username, user.username, exists.username);
      throw new Error("Username taken");
    } else if (username) {
      if (user.username !== username)
        l("changing username", user.username, username);
      user.username = username;
    }

    let attributes = [
      "address",
      "cipher",
      "currencies",
      "currency",
      "display",
      "email",
      "fiat",
      "locktime",
      "prompt",
      "pubkey",
      "salt",
      "seed",
      "tokens",
      "twofa"
    ];

    for (let a of attributes) {
      if (body[a]) user[a] = body[a];
    }

    if (password && password === confirm) {
      user.password = await bcrypt.hash(password, 1);
    }

    user.haspin = !!user.pin;
    await s(`user:${user.id}`, user);

    emit(user.username, "user", user);
    res.send({ user, token });
  },

  async login(req, res) {
    try {
      const { params, sig, key, password, username, token: twofa } = req.body;
      l("logging in", username);

      if (sig) {
        const { callback } = params;

        try {
          const url = `${callback}&sig=${sig}&key=${key}`;
          const response = await got(url).json();
          res.send(response);
        } catch (e) {
          err("problem calling lnurl login", e.message);
          res.code(500).send(e.message);
        }

        return;
      }

      let id = await g(`user:${username}`);
      let user = await g(`user:${id}`);

      if (
        !user ||
        (user.password && !(await bcrypt.compare(password, user.password)))
      ) {
        warn("invalid username or password attempt", username);
        return res.code(401).send({});
      }

      if (
        user.twofa &&
        (typeof twofa === "undefined" ||
          !authenticator.check(twofa, user.otpsecret))
      ) {
        return res.code(401).send("2fa required");
      }

      l(
        "login",
        username,
        req.headers["x-forwarded-for"] || req.socket.remoteAddress
      );

      let payload = { username, id: user.id };
      let token = jwt.sign(payload, config.jwt);
      res.cookie("token", token, { expires: new Date(Date.now() + 432000000) });
      user = pick(user, whitelist);
      res.send({ user, token });
    } catch (e) {
      console.log(e);
      err("login error", e.message, req.socket.remoteAddress);
      res.code(401).send({});
    }
  },

  async logout(req, res) {
    let { subscription } = req.body;
    if (!subscription) return res.send({});

    const { username } = req.user;

    if (username) {
      l("logging out", username);
      let i = req.user.subscriptions.findIndex(
        s => JSON.stringify(s) === subscription
      );
      if (i > -1) {
        req.user.subscriptions.splice(i, 1);
      }
      await req.user.save();
      Object.keys(logins).map(
        k => logins[k]["username"] === username && delete logins[k]
      );
    }

    res.send({});
  },

  async subscribe({ body, user }, res) {
    let { subscriptions } = user;
    let { subscription } = body;
    if (!subscriptions) subscriptions = [];
    if (
      !subscriptions.find(
        s => JSON.stringify(s) === JSON.stringify(subscription)
      )
    )
      subscriptions.push(subscription);
    user.subscriptions = subscriptions;
    l("subscribing", user.username);
    await user.save();
    res.sendStatus(201);
  },

  async password({ body: { password }, user }, res) {
    if (!user.password) return res.send(true);
    res.send(await bcrypt.compare(password, user.password));
  },

  async otpsecret(req, res) {
    try {
      await requirePin(req);
      let { otpsecret, username } = req.user;
      res.send({ secret: otpsecret, username });
    } catch (e) {
      res.code(500).send(e.message);
    }
  },

  async contacts({ user: { uuid } }, res) {
    let payments = (await g(`${uuid}:payments`)) || [];
    res.send(
      Promise.all(
        [...new Set(payments.map(p => p.with_id))].map(id => g(`user:${id}`))
      )
    );
  }
};