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

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

    // validate request

    if (
      !username ||
      !accountName ||
      !password ||
      !language ||
      !isUsernameValid(username) ||
      !isAccountNameValid(accountName) ||
      !isLanguageCodeValid(language)
    ) {
      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_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,
          language: language,
          analytics_enabled: USER_ANALYTICS_ENABLED_DEFAULT,
        })
          .then((user) => {
            logger.debug(
              "User created with accountName: %s username: %s",
              user.account_name,
              user.username
            );

            // create session
            saveSession(req, 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(req, 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",
        "store_id",
        "language",
        "analytics_enabled",
      ],
    });

    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"],
    });

    let respData = {
      user: user,
      stores: stores,
      // only temporary until we have a proper permissions system
      permissions: [] as string[],
    };

    // if user is not a store master, then check if user is a worker
    if (!stores || stores.length === 0) {
      const store = await Store.findOne({
        where: {
          store_id: user.store_id,
        },
        attributes: ["store_id", "name"],
      });

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

      stores.push(store);

      respData.stores = stores;

      respData.permissions.push("calendar");
    } else {
      respData.permissions.push(
        "settings",
        "employees",
        "services",
        "calendar",
        "website"
      );
    }

    // update user session last_used

    Session.update(
      {
        last_used: new Date(),
      },
      {
        where: {
          session_id: session.session_id,
        },
      }
    );

    res.status(200).send(respData);
  } 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" });
  }
}

export async function GetUserProfileSettings(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: ["language", "analytics_enabled", "username", "account_name"],
    });

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

export async function UpdateUserProfileSettings(req: Request, res: Response) {
  try {
    const { language, analyticsEnabled, username, accountName } = req.body;

    if (
      !language &&
      analyticsEnabled === undefined &&
      !username &&
      !accountName
    ) {
      return res.status(400).send({ err: "invalid request" });
    }

    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,
      },
    });

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

    if (language) {
      user.language = language;
    }

    if (analyticsEnabled !== undefined) {
      user.analytics_enabled = analyticsEnabled;
    }

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

      user.username = username;
    }

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

      user.account_name = accountName;
    }

    await user.save();

    res.status(200).send({ msg: "user profile settings updated" });
  } catch (error) {
    logger.error(error);
    res.status(500).send({ err: "invalid request" });
  }
}

export async function UpdateUserProfilePassword(req: Request, res: Response) {
  try {
    const { currentPassword, newPassword } = req.body;

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

    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: ["password"],
    });

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

    const decodedCurrentPassword = decodeBase64(currentPassword);

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

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

    const decodedPassword = decodeBase64(newPassword);

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

    const hashedPassword = await hashPassword(decodedPassword);

    // update user password

    await User.update(
      {
        password: hashedPassword,
      },
      {
        where: {
          user_id: session.user_id,
        },
      }
    );

    // delete all sessions of this user by deleting all sessions with this user_id

    await Session.destroy({
      where: {
        user_id: session.user_id,
      },
    });

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

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

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

    const sessions = await Session.findAll({
      where: {
        user_id: session.user_id,
      },
      attributes: ["session_id", "id", "browser", "os", "last_used"],
    });

    // set last_used to now if session is the user's current session

    let currentSession = sessions.find(
      (sess) => sess.session_id === session.session_id
    )?.id;

    // remove session_id from sessions for security reasons

    const sessionsList = sessions.map((sess) => {
      return {
        id: sess.id,
        browser: sess.browser,
        os: sess.os,
        last_used: sess.last_used,
      };
    });

    res.status(200).json({
      sessions: sessionsList,
      currentSession: currentSession,
    });
  } catch (error) {
    logger.error(error);
    res.status(500).send({ err: "invalid request" });
  }
}

export async function DeleteUserProfileSession(req: Request, res: Response) {
  try {
    const { id } = req.params;

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

    const session = await getUserSession(req);

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

    await Session.destroy({
      where: {
        id: id,
        user_id: session.user_id,
      },
    });

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