const AppError = require("../middleware/AppError.js");
const {
  MISSING_REQUIRED_PARAMETER,
  ROOM_NOT_FOUND,
  ROOM_ALREADY_EXISTS,
  GETTING_ROOM_ERROR,
  DELETE_ROOM_ERROR,
  UPDATE_ROOM_ERROR,
} = require("../constants/errorCodes");

class RoomsController {
  constructor(roomsModel) {
    this.rooms = roomsModel;
    this.getRoomTitle = this.getRoomTitle.bind(this);
  }

  create = async (req, res, next) => {
    try {
      if (!req.user || !req.user.userId) {
        throw new AppError("Utilisateur non authentifié", 401);
      }

      const { title } = req.body;
      if (!title) {
        throw new AppError(MISSING_REQUIRED_PARAMETER);
      }

      const normalizedTitle = title.toUpperCase();

      const roomExists = await this.rooms.roomExists(normalizedTitle);

      if (roomExists) {
        const error = new Error("Room already exists");
        error.statusCode = 409;
        throw error;
      }

      const result = await this.rooms.create(normalizedTitle, req.user.userId);

      return res.status(201).json({
        message: "Room créée avec succès.",
        roomId: result.insertedId,
      });
    } catch (error) {
      if (error instanceof Error) {
        if (error.message === "Room already exists") {
          return next(new AppError(ROOM_ALREADY_EXISTS));
        } 
      }

      next(error);
    }
  };

  
  getUserRooms = async (req, res, next) => {
    try {
      const rooms = await this.rooms.getUserRooms(req.user.userId);

      if (!rooms) {
        throw new AppError(ROOM_NOT_FOUND);
      }

      return res.status(200).json({
        data: rooms,
      });
    } catch (error) {
      return next(error);
    }
  };

  getRoomContent = async (req, res, next) => {
    try {
      const { roomId } = req.params;

      if (!roomId) {
        throw new AppError(MISSING_REQUIRED_PARAMETER);
      }
      const content = await this.rooms.getContent(roomId);

      if (!content) {
        throw new AppError(GETTING_ROOM_ERROR);
      }

      return res.status(200).json({
        data: content,
      });
    } catch (error) {
      return next(error);
    }
  };

  delete = async (req, res, next) => {
    try {
      const { roomId } = req.params;

      if (!roomId) {
        throw new AppError(MISSING_REQUIRED_PARAMETER);
      }

      const owner = await this.rooms.getOwner(roomId);

      if (owner != req.user.userId) {
        throw new AppError(ROOM_NOT_FOUND);
      }

      const result = await this.rooms.delete(roomId);

      if (!result) {
        throw new AppError(DELETE_ROOM_ERROR);
      }

      return res.status(200).json({
        message: "Salle supprimé avec succès.",
      });
    } catch (error) {
      return next(error);
    }
  };

  rename = async (req, res, next) => {
    try {
      const { roomId, newTitle } = req.body;

      if (!roomId || !newTitle) {
        throw new AppError(MISSING_REQUIRED_PARAMETER);
      }

      const owner = await this.rooms.getOwner(roomId);

      if (owner != req.user.userId) {
        throw new AppError(ROOM_NOT_FOUND);
      }

      const exists = await this.rooms.roomExists(newTitle, req.user.userId);

      if (exists) {
        throw new AppError(ROOM_ALREADY_EXISTS);
      }

      const result = await this.rooms.rename(roomId, req.user.userId, newTitle);

      if (!result) {
        throw new AppError(UPDATE_ROOM_ERROR);
      }

      return res.status(200).json({
        message: "Salle mis � jours avec succ�s.",
      });
    } catch (error) {
      return next(error);
    }
  };

  getRoomById = async (req, res, next) => {
    try {
      const { roomId } = req.params;

      if (!roomId) {
        throw new AppError(MISSING_REQUIRED_PARAMETER);
      }

      // Is this room mine
      const owner = await this.rooms.getOwner(roomId);

      if (owner != req.user.userId) {
        throw new AppError(ROOM_NOT_FOUND);
      }

      const room = await this.rooms.getRoomById(roomId);

      if (!room) {
        throw new AppError(ROOM_NOT_FOUND);
      }

      return res.status(200).json({
        data: room,
      });
    } catch (error) {
      return next(error);
    }
  };
  getRoomTitle = async (req, res, next) => {
    try {
      const { roomId } = req.params;

      if (!roomId) {
        throw new AppError(MISSING_REQUIRED_PARAMETER);
      }

      const room = await this.rooms.getRoomById(roomId);

      if (room instanceof Error) {
        throw new AppError(ROOM_NOT_FOUND);
      }

      return res.status(200).json({ title: room.title });
    } catch (error) {
      return next(error);
    }
  };
  roomExists = async (req, res, next) => {
    try {
      const { title } = req.body;

      if (!title) {
        throw new AppError(MISSING_REQUIRED_PARAMETER);
      }
      const userId = req.user.userId;

      const exists = await this.rooms.roomExists(title, userId);

      return res.status(200).json({
        exists: exists,
      });
    } catch (error) {
      return next(error);
    }
  };
  getRoomTitleByUserId = async (req, res, next) => {
    try {
      const { userId } = req.params;

      if (!userId) {
        throw new AppError(MISSING_REQUIRED_PARAMETER);
      }

      const rooms = await this.rooms.getUserRooms(userId);

      if (!rooms || rooms.length === 0) {
        throw new AppError(ROOM_NOT_FOUND);
      }

      const roomTitles = rooms.map((room) => room.title);

      return res.status(200).json({
        titles: roomTitles,
      });
    } catch (error) {
      return next(error);
    }
  };
}

module.exports = RoomsController;