const PlayList = require('../models/playlist.model');
const Song = require('../models/song.model');
const { User } = require('../models/user.model');



// const createPlaylist = async (req, res) => {
//     try {
//         console.log(req.body);
//         let obj = {
//             name: req.body.name ? req.body.name : undefined,
//             songs: req.body.songs ? req.body.songs : undefined,
//             userId: req.userId
//         }
//         const created_playlist = await PlayList.create(obj);
//         const user = await User.findById(req.userId);
//         await user.playlist.push(created_playlist._id);
//         await user.save();
//         return res.status(201).send({
//             error_code: 200,
//             message: 'Playlist got created'
//         })

//     } catch (err) {
//         console.log('Error inside createPlaylist ', err);
//         return res.status(500).send({
//             error_code: 500,
//             message: 'Internal Server Error'
//         })
//     }
// }

const createPlaylist = async (req, res) => {
    try {
        // Check if songs are provided in the request body
        if (!req.body.songs) {
            return res.status(400).send({
                error_code: 400,
                message: 'Songs must be provided'
            });
        }

        // Convert a single song ID to an array
        const songIds = Array.isArray(req.body.songs) ? req.body.songs : [req.body.songs];

        // Check if all songs exist
        const songs = await Song.find({ _id: { $in: songIds } });
        if (songs.length !== songIds.length) {
            return res.status(400).send({
                error_code: 400,
                message: 'One or more songs do not exist'
            });
        }

        let obj = {
            name: req.body.name ? req.body.name : undefined,
            songs: songIds,
            userId: req.userId
        };

        const created_playlist = await PlayList.create(obj);
        const user = await User.findById(req.userId);
        await user.playlist.push(created_playlist._id);
        await user.save();
        return res.status(201).send({
            error_code: 200,
            message: 'Playlist created successfully'
        });

    } catch (err) {
        console.log('Error inside createPlaylist ', err);
        return res.status(500).send({
            error_code: 500,
            message: 'Internal Server Error'
        });
    }
};




const addSong = async (req, res) => {
    try {
        const playlist = await PlayList.findById(req.params.id);

        const obj = {
            name: req.body.name ? req.body.name : undefined,
        }

        playlist.songs.push(req.body.song);
        await playlist.save();
        await playlist.updateOne(obj);
        await playlist.save();
        return res.status(201).send({
            error_code: 200,
            message: 'Songs added to playlist'
        })



    } catch (err) {
        console.log('Error inside update playlist', err);
        return res.status(500).send({
            error_code: 500,
            message: 'Internal server Error'
        })
    }
}

const removeSong = async (req, res) => {
    try {
        let playlist = await PlayList.findById(req.params.id);
        console.log(playlist);
        for (let i = 0; playlist.songs.length; i++) {
            if (playlist.songs[i] == req.body.song) {
                playlist.songs.splice(i, 1);
                await playlist.save();
                return res.status(201).send({
                    error_code: 200,
                    message: 'Song got removed from playlist'
                })
            }
        }
    } catch (err) {
        console.log('Error inside removeSong Controller', err);
        return res.status(500).send({
            error_code: 500,
            message: 'Internal Server Error'
        })
    }
}

const getPlaylist = async (req, res) => {
    try {
        let obj = {};
        if (req.params.id) {
            obj['_id'] = req.params.id
        }
        const playlist = await PlayList.find(obj);

        return res.status(200).send(playlist);

    } catch (err) {
        console.log('Error inside getPlaylist Controller', err);
        return res.status(500).send({
            error_code: 500,
            message: 'Internal Server Error'
        })
    }
}

const deletePlaylist = async (req, res) => {
    try {
        let id = req.params.id;
        await PlayList.deleteOne({ _id: id });
        const user = await User.findById(req.userId);
        for (let i = 0; i < user.playlist.length; i++) {
            console.log(user.playlist[i] == req.params.id);
            if (user.playlist[i] == req.params.id) user.playlist.splice(i, 1);
        }
        return res.status(201).send({
            message: 'Playlist got deleted'
        })

    } catch (err) {
        console.log('Error inside deletePlaylist Controller', err);
        return res.status(500).send({
            message: 'Internal Server Error'
        })
    }
}


module.exports = {
    createPlaylist,
    addSong,
    removeSong,
    getPlaylist,
    deletePlaylist
}