const User = require("../models/User");
const asyncHandler = require("../middlewares/asyncHandler");
const ErrorResponse = require("../util/errorResponse");

module.exports.getProfile = asyncHandler(async (req, res, next) => {
    const username = req.params.username;
    const { loggedUser } = req;
    const user = await User.findOne({ where: { username: username } });

    if (!user) {
        return next(new ErrorResponse(`User not found`, 404));
    }

    let isFollowing = false;

    if (loggedUser) {
        const followers = await user.getFollowers();
        isFollowing = followers.some((user) => user.id === loggedUser.id);
    }

    const profile = {
        username,
        firstname: user.firstname,
        lastname: user.lastname,
        bio: user.bio,
        image: user.image,
        following: isFollowing,
    };
    res.status(200).json({ profile });
});

module.exports.followUser = asyncHandler(async (req, res, next) => {
    const username = req.params.username;
    const { loggedUser } = req;
    const userToFollow = await User.findOne({ where: { username: username } });

    if (!userToFollow) {
        return next(new ErrorResponse(`User not found`, 404));
    }

    const currentUser = await User.findByPk(loggedUser.id);

    await userToFollow.addFollower(currentUser);

    const profile = {
        username: username,
        firstname: userToFollow.dataValues.firstname,
        lastname: userToFollow.dataValues.lastname,
        bio: userToFollow.dataValues.bio,
        image: userToFollow.dataValues.image,
        following: true,
    };

    res.status(200).json({ profile });
});

module.exports.unfollowUser = asyncHandler(async (req, res, next) => {
    const username = req.params.username;
    const { loggedUser } = req;
    const userToUnfollow = await User.findOne({ where: { username: username } });

    if (!userToUnfollow) {
        return next(new ErrorResponse(`User not found`, 404));
    }

    const currentUser = await User.findByPk(loggedUser.id);

    await userToUnfollow.removeFollower(currentUser);

    const profile = {
        username: username,
        firstname: userToUnfollow.dataValues.firstname,
        lastname: userToUnfollow.dataValues.lastname,
        bio: userToUnfollow.dataValues.bio,
        image: userToUnfollow.dataValues.image,
        following: false,
    };

    res.status(200).json({ profile });
});