const { UserService, SkydiverProfileService } = require('../services');
const ErrorResponse = require("../utils/errorResponse");
var crypto = require('crypto');
const passport = require('passport');

module.exports.authenticate = async (req, res, next) => {
    try {
        passport.authenticate('headerapikey', { session: false }, function (err, application, info) {
            if (err) {
                //return res.status(err.status || 500).json({message: "An authentication error occured.", err: err.message});
                return next(new ErrorResponse('Something went wrong while authenticating.', err.status || 500, err.message));
            }
            if (!application) {
                return next(new ErrorResponse("Unauthorized", 401, "You are not allowed to access this resource."));
            }
            if (application.author) {
                application.author.token = application.author.generateJWT();
                return res.json({
                    user: application.author.toAuthJSON(),
                    application: application.toAuthJSON()
                });
            } else {
                return res.status(422).json(info);
            }
        })(req, res, next);
    } catch (err) {
        //res.status(500).json({ message: 'Something went wrong while authenticating.', error: err.message });
        return next(new ErrorResponse('Something went wrong while authenticating.', 500, err.message));
    }
};

module.exports.createUser = async (req, res, next) => {
    try {
        const { username, firstname, lastname, phone, email, password } = req.body.user;
        const userSlug = UserService.slugify(username);
        const slugInDB = await UserService.isUsernameUsed(userSlug);
        if (slugInDB) {
            return next(new ErrorResponse("Username already exists", 400));
        }

        const uuid = crypto.randomUUID()
        const user = await UserService.createUser({
            id: uuid,
            username,
            firstname,
            lastname,
            phone,
            email,
            password
        });

        res.status(201).json({
            message: 'User created successfully.',
            data: user,
        });
    } catch (err) {
        return next(new ErrorResponse('Something went wrong while creating user.', 500, err.message));
    }
};

module.exports.getAllUsers = async (req, res, next) => {
    try {
        const users = await UserService.getAllUsers();

        res.status(200).json({
            data: users,
        });
    } catch (err) {
        return next(new ErrorResponse('Something went wrong while fetching user.', 500, err.message));
    }
};

module.exports.getUser = async (req, res, next) => {
    try {
        const user = await UserService.getUserById(req.payload.id);
        if (!user) {
            return next(new ErrorResponse("Unauthorized", 401, "Authentication required."));
        }

        const profile = await SkydiverProfileService.getByUserId(req.payload.id);

        res.status(200).json({
            user: {
                ...user.toAuthJSON(),
                ...(profile ? profile.toJSONFor() : { poids: null, licence: null, bg_image: null }),
            }
        });
    } catch (err) {
        return next(new ErrorResponse('Something went wrong while fetching user.', 500, err.message));
    }
};

module.exports.loginAsUser = async (req, res, next) => {
    try {
        passport.authenticate('local', { session: false }, function (err, user, info) {
            if (err) {
                return next(err);
            }
            if (user) {
                user.token = user.generateJWT();
                return res.json({ user: user.toAuthJSON() });
            } else {
                return res.status(422).json(info);
            }
        })(req, res, next);
    } catch (err) {
        return next(new ErrorResponse('Something went wrong while processing login.', 500, err.message));
    }
};

module.exports.updateUser = async (req, res, next) => {
    try {
        let user = await UserService.getUserById(req.payload.id);
        if (!user) {
            return next(new ErrorResponse("Unauthorized", 401, "You are not allowed to access this resource."));
        }
        if (typeof req.body.user.firstname !== 'undefined') {
            user.firstname = req.body.user.firstname;
        }
        if (typeof req.body.user.lastname !== 'undefined') {
            user.lastname = req.body.user.lastname;
        }
        if (typeof req.body.user.phone !== 'undefined') {
            user.phone = req.body.user.phone;
        }
        if (typeof req.body.user.image !== 'undefined') {
            user.image = req.body.user.image;
        }
        if (typeof req.body.user.role !== 'undefined') {
            return next(new ErrorResponse("Forbidden", 403, "A suspected attempt to usurp rights has been detected. The suspicious activity has been reported and xill be investigated."));
        }

        const updatedUser = await UserService.updateUserById(user, req.payload.id);

        const skydiverFields = {};
        if (typeof req.body.user.licence !== 'undefined') skydiverFields.licence = req.body.user.licence;
        if (typeof req.body.user.poids !== 'undefined') skydiverFields.poids = req.body.user.poids;
        if (typeof req.body.user.bg_image !== 'undefined') skydiverFields.bg_image = req.body.user.bg_image;
        if (Object.keys(skydiverFields).length > 0) {
            await SkydiverProfileService.upsert(req.payload.id, skydiverFields);
        }

        res.status(200).json({
            user: updatedUser.toAuthJSON()
        });
    } catch (err) {
        return next(new ErrorResponse('Something went wrong while updating user.', 500, err.message));
    }
};

module.exports.updateUserEmail = async (req, res, next) => {
    try {
        let user = await UserService.getUserById(req.payload.id);
        if (!user) {
            return next(new ErrorResponse("Unauthorized", 401, "You are not allowed to access this resource."));
        }

        if (typeof req.body.user.email !== 'undefined') {
            user.email = req.body.user.email;
        }

        user = await UserService.updateUserById(user, req.payload.id);
        res.status(200).json({
            user: user.toAuthJSON(),
        });
    } catch (err) {
        return next(new ErrorResponse('Something went wrong while updating user.', 500, err.message));
    }
};

module.exports.updateUserPassword = async (req, res, next) => {
    try {
        let user = await UserService.getUserById(req.payload.id);
        if (!user) {
            return next(new ErrorResponse("Unauthorized", 401, "You are not allowed to access this resource."));
        }
        if (typeof req.body.user.password !== 'undefined') {
            const {salt, hash} = UserService.generateSaltHash(req.body.user.password);
            user.salt = salt;
            user.hash = hash;
        }
        user = await UserService.updateUserById(user, req.payload.id);
        res.status(200).json({
            user: user.toAuthJSON(),
        });
    } catch (err) {
        return next(new ErrorResponse('Something went wrong while updating user.', 500, err.message));
    }
};

module.exports.updateUserRole = async (req, res, next) => {
    try {
        let user = await UserService.getUserById(req.payload.id);
        if (!user) {
            return next(new ErrorResponse("Unauthorized", 401, "You are not allowed to access this resource."));
        }
        if (user.role !== 'Admin') {
            return next(new ErrorResponse("Forbidden", 403, "You are not allowed to change user roles."));
        }

        if (typeof req.body.user.role !== 'undefined') {
            user.role = req.body.user.role;
        }

        user = await UserService.updateUserById(user, req.payload.id);
        res.status(200).json({
            user: user.toAuthJSON(),
        });
    } catch (err) {
        return next(new ErrorResponse('Something went wrong while updating user.', 500, err.message));
    }
};

module.exports.updateUserUsername = async (req, res, next) => {
    try {
        let user = await UserService.getUserById(req.payload.id);
        if (!user) {
            return next(new ErrorResponse("Unauthorized", 401, "You are not allowed to access this resource."));
        }

        if (typeof req.body.user.username !== 'undefined') {
            user.username = req.body.user.username;
        }

        user = await UserService.updateUserById(user, req.payload.id);
        res.status(200).json({
            user: user.toAuthJSON(),
        });
    } catch (err) {
        return next(new ErrorResponse('Something went wrong while updating user.', 500, err.message));
    }
};