const mongoose = require("mongoose");

const { Schema } = mongoose;

const ChallengeSchema=new Schema({
    challengeName: {type: String, required: true},
    startDate: {type: Object, required: true},
    endDate: {type: Object, required: true},
    durationPerSession: {type: String, required: true}, // '1d' means one day per session, '2w' means 2 weeks per session, '3m' means 3 months per session.
    goalPerSession: {type: Number, required:true}, // number of problems for one session
    status: { type: String }
},{
    collection: 'challenge'
});

ChallengeSchema.statics.findByChallengeName=function(challengeName){
    return this.findOne({challengeName:challengeName});
}

ChallengeSchema.methods.getChallengeName=function(){
    return this.challengeName;
}

ChallengeSchema.methods.getStartDate=function(){
    return this.startDate;
}

ChallengeSchema.methods.getEndDate=function(){
    return this.endDate;
}

ChallengeSchema.method.getDurationPerSession=function(){
    return this.durationPerSession;
}

ChallengeSchema.methods.getGoalPerSession=function(){
    return this.goalPerSession;
}

ChallengeSchema.methods.getStatus=function(){
    return this.status;
}

ChallengeSchema.methods.serialize=function(){
    let challengeJSON = this.toJSON();
    delete challengeJSON._id;
    return challengeJSON;
}

const Challenge = mongoose.model('Challenge', ChallengeSchema);
module.exports = Challenge;