const DBName = "EMI_SOCIAL";
const Song = require("./../def/songs.js")

postDB = (DB)=>{
    DB.songsCol = DB.db.db(DBName).collection("songs");
    
    DB.newSong = (songObj) => {
        return DB.songsCol.insertOne(songObj.toObj()).catch((err)=>{
            console.log(err);
            return false;
        });
    }

    DB.removeSong = (songId) => {
        if(!DB.ObjectID.isValid(songId)) return false;
        const _id = DB.ObjectID(songId);
        return DB.songsCol.deleteOne({_id}).catch((err)=>{
            console.log(err);
            return false;
        });
    }

    DB.updateSongContent = (songId, newContent, oldContent) => {
        if(!DB.ObjectID.isValid(songId)) return false;
        const id = DB.ObjectID(songId);
        let update = {
            $set:{
                content: newContent,
                // lastUpdated: new Date() // add back when finish updating videos.
            },
            $push: {
                contentHistory: oldContent
            }
        }
        return DB.songsCol.updateOne({_id: id}, update).catch((err)=>{
            console.log(err);
            return false;
        });
    }

    DB.newReaction = (songId, profileid, reaction) => {
        if(!DB.ObjectID.isValid(songId)) return false;
        const id = DB.ObjectID(songId);
        let update = {
            $set:{
                ["reactions." + profileid]: reaction,
                lastUpdated: new Date()
            }            
        }
        return DB.songsCol.updateOne({_id: id}, update).catch((err)=>{
            console.log(err);
            return false;
        });
    }

    DB.removeReaction = (songId, profileid) => {
        if(!DB.ObjectID.isValid(songId)) return false;
        const id = DB.ObjectID(songId);
        let update = {
            $unset:{
                ["reactions." + profileid]: ""
            },
            //$set: { //Maybe is not relevant to pump post here
            //    lastUpdated: new Date()
            //}            
        }
        return DB.songsCol.updateOne({_id: id}, update).catch((err)=>{
            console.log(err);
            return false;
        });
    }

    DB.newComment = (songId, comment) => {
        if(!DB.ObjectID.isValid(songId)) return false;
        const id = DB.ObjectID(songId);
        return DB.songsCol.updateOne({_id: id}, {
            $push: {
                comments: comment
            },
            $set: {
                lastUpdated: new Date()
            }
        }).catch((err)=>{
            console.log(err);
            return false;
        });
    }

    DB.newCommentReaction = (songId, commentDate, profileid, reaction) => {
        if(!DB.ObjectID.isValid(songId)) return false;
        const id = DB.ObjectID(songId);
        let update = {
            $set:{
                ["comments.$.reactions." + profileid]: reaction,
                "comments.$.lastUpdated": new Date(),
                lastUpdated: new Date()
            }            
        }
        return DB.songsCol.updateOne({
            _id: id,
            "comments.createdAt": commentDate
        }, update).catch((err)=>{
            console.log(err);
            return false;
        });
    }

    DB.removeCommentReaction = (songId, commentDate, profileid) => {
        if(!DB.ObjectID.isValid(songId)) return false;
        const id = DB.ObjectID(songId);
        let update = {
            $unset:{
                ["comments.$.reactions." + profileid]: '',
                "comments.$.lastUpdated": new Date(),
            },
            $set: {
                lastUpdated: new Date()
            }            
        }
        return DB.songsCol.updateOne({
            _id: id,
            "comments.createdAt": commentDate
        }, update).catch((err)=>{
            console.log(err);
            return false;
        });
    }

    DB.getSongs = async (limit = 20) => {
        let query = {};
        return DB.songsCol.find(query).sort({_id: -1}).limit(limit).toArray().catch((err)=>{
            console.log(err);
            return false;
        });
    }

    DB.getSong = (songId) => {
        if(!DB.ObjectID.isValid(songId)) return [];
        let _id = DB.ObjectID(songId);
        return DB.songsCol.findOne({_id}).catch((err)=>{
            console.log(err);
            return false;
        });
    }
    
}

module.exports = postDB;