import { Request, Response } from "express";
import logger from "../logger/logger";
import User from "../models/user";
import {
  isAccountNameValid,
  isPasswordValid,
  isUsernameValid,
} from "../validator/validator";
import {
  CALENDAR_MAX_FUTURE_BOOKING_DAYS,
  CALENDAR_MAX_SERVICE_DURATION,
  CALENDAR_MIN_EARLIEST_BOOKING_TIME,
  CALENDAR_USING_PRIMARY_CALENDAR,
  Roles,
} from "../utils/constants";
import {
  decodeBase64,
  getUserSession,
  hashPassword,
  matchPassword,
  newStoreId,
  newUserId,
  saveSession,
} from "../utils/utils";
import Store from "../models/store";

export async function SignUp(req: Request, res: Response) {
  try {
    let { username, accountName, password } = req.body;

    // validate request

    if (!username || !accountName || !password) {
      return res.status(400).send({ err: "invalid request" });
    }

    if (!isUsernameValid(username)) {
      return res.status(400).send({ err: "invalid request" });
    }

    if (!isAccountNameValid(accountName)) {
      return res.status(400).send({ err: "invalid request" });
    }

    accountName = accountName.toLowerCase();

    // check if user already exists

    const existingUser = await User.findOne({
      where: {
        account_name: accountName,
      },
    });

    if (existingUser) {
      logger.debug(
        "User already exists with this accountName: %s",
        accountName
      );
      return res.status(400).send({ err: "invalid request" });
    }

    // decode password

    const decodedPassword = decodeBase64(password);

    if (!isPasswordValid(decodedPassword)) {
      logger.debug("Password is not valid");
      return res.status(400).send({ err: "invalid request" });
    }

    // hash password

    const hashedPassword = await hashPassword(decodedPassword);

    // create store

    let userId = newUserId();

    Store.create({
      store_id: newStoreId(),
      owner_user_id: userId,
      name: username,
      calendar_max_future_booking_days: CALENDAR_MAX_FUTURE_BOOKING_DAYS,
      calendar_min_earliest_booking_time: CALENDAR_MIN_EARLIEST_BOOKING_TIME,
      calendar_using_primary_calendar: CALENDAR_USING_PRIMARY_CALENDAR,
      calendar_max_service_duration: CALENDAR_MAX_SERVICE_DURATION,
    })
      .then(async (store) => {
        logger.debug(
          "Store created with storeId: %s storeName: %s",
          store.store_id,
          store.name
        );

        // create user

        await User.create({
          user_id: userId,
          store_id: store.store_id,
          role: Roles.Master,
          account_name: accountName,
          username: username,
          password: hashedPassword,
        })
          .then((user) => {
            logger.debug(
              "User created with accountName: %s username: %s",
              user.account_name,
              user.username
            );

            // create session
            saveSession(res, user.user_id, user.username);
          })
          .catch((err) => {
            logger.error(err);
            res.status(500).send({ err: "invalid request" });
          });
      })
      .catch((err) => {
        logger.error(err);
        res.status(500).send({ err: "invalid request" });
      });
  } catch (error) {
    logger.error(error);
    res.status(500).send({ err: "invalid request" });
  }
}

export async function Login(req: Request, res: Response) {
  try {
    let { accountName, password } = req.body;

    // validate request

    if (!accountName || !password) {
      return res.status(400).send({ err: "invalid request" });
    }

    accountName = accountName.toLowerCase();

    if (!isAccountNameValid(accountName)) {
      return res.status(400).send({ err: "invalid request" });
    }

    // check if user exists
    const user = await User.findOne({
      where: {
        account_name: accountName,
      },
    });

    if (!user) {
      logger.debug(
        "User does not exist with this accountName: %s",
        accountName
      );
      return res.status(400).send({ err: "invalid request" });
    }

    // decode password

    const decodedPassword = decodeBase64(password);

    if (!isPasswordValid(decodedPassword)) {
      logger.debug("Password is not valid");
      return res.status(400).send({ err: "invalid request" });
    }

    // compare password

    const match = await matchPassword(decodedPassword, user.password);

    if (!match) {
      logger.debug("Password is not valid");
      return res.status(400).send({ err: "invalid request" });
    }

    // create session
    saveSession(res, user.user_id, user.username);
  } catch (error) {
    logger.error(error);
    res.status(500).send({ err: "invalid request" });
  }
}

export async function Logout(req: Request, res: Response) {
  try {
    const session = await getUserSession(req);

    if (!session) {
      return res.status(401).send({ err: "unauthorized" });
    }

    await session.destroy();

    res.status(200).send({ msg: "logout successful" });
  } catch (error) {
    logger.error(error);
    res.status(500).send({ err: "invalid request" });
  }
}

export async function GetUser(req: Request, res: Response) {
  try {
    const session = await getUserSession(req);

    if (!session) {
      return res.status(401).send({ err: "unauthorized" });
    }

    const user = await User.findOne({
      where: {
        user_id: session.user_id,
      },
      attributes: ["user_id", "username"],
    });

    if (!user) {
      return res.status(401).send({ err: "unauthorized" });
    }

    const stores = await Store.findAll({
      where: {
        owner_user_id: user.user_id,
      },
      attributes: ["store_id", "name"],
    });

    res.status(200).send({ user, stores });
  } catch (error) {
    logger.error(error);
    res.status(500).send({ err: "invalid request" });
  }
}

export async function IsAccountNameAvailable(req: Request, res: Response) {
  try {
    let { accountName } = req.body;

    // validate request

    if (!accountName) {
      return res.status(400).send({ err: "invalid request" });
    }

    accountName = accountName.toLowerCase();

    if (!isAccountNameValid(accountName)) {
      return res.status(400).send({ err: "invalid request" });
    }

    // check if user exists

    const user = await User.findOne({
      where: {
        account_name: accountName,
      },
    });

    if (user) {
      logger.debug(
        "User already exists with this accountName: %s",
        accountName
      );
      return res.status(400).send({ err: "invalid request" });
    }

    res.status(200).send({ msg: "account name available" });
  } catch (error) {
    logger.error(error);
    res.status(500).send({ err: "invalid request" });
  }
}