02. Vacation

class Vacation {
    constructor(organizer, destination, budget){
        this.organizer = organizer;
        this.destination = destination;
        this.budget = budget;
        this.kids = {};
    }

    registerChild(name, grade, budget){
        if(budget < this.budget){
            return `${name}'s money is not enough to go on vacation to ${this.destination}.`;
        }
        if(this.kids.hasOwnProperty(grade)){

            for(let kid of this.kids[grade]){
                if(kid === `${name}-${budget}`){
                    return `${name} is already in the list for this ${this.destination} vacation.`;
                }
                this.kids[grade].push(`${name}-${budget}`);
            }
        }else{

            this.kids[grade] = [];
            this.kids[grade].push(`${name}-${budget}`);
        }
        return this.kids[grade];
    }

    removeChild(name, grade){
        if(this.kids.hasOwnProperty(grade)){
            for(let kid of this.kids[grade]){
                let kidInfo = kid.split('-');
                let kidName = kidInfo[0];

                if(kidName === name){
                    let index = this.kids[grade].indexOf(kid);
                    this.kids[grade].splice(index, 1);
                    return this.kids[grade];
                }
            }
        }

        return `We couldn't find ${name} in ${grade} grade.`;
    }

    get numberOfChildren(){
        this._numberOfChildren = 0 ;
        for(let grade in this.kids){
            this._numberOfChildren = this.kids[grade].length
        }
        return this._numberOfChildren;
    }
    toString() {
        if(this.numberOfChildren === 0){
            return `No children are enrolled for the trip and the organization of ${this.organizer} falls out...`;
        }

        let result = `${this.organizer} will take ${this.numberOfChildren} children on trip to ${this.destination} \n`;

        Object.entries(this.kids).sort((a, b) => a[0] - b[0]);

        for(let grade in this.kids){
            result+= `Grade: ${grade}\n`;
            let currentNumber =1;
            for(let kid of this.kids[grade]){
                result += `${currentNumber}. ${kid}\n`;
                currentNumber++;
            }
        }

        return result;

    }
}
// let vacat