class VeterinaryClinic {
    constructor(clinicName,capacity) {
        this.clinicName=clinicName;
        this.capacity=capacity;
        this.clients=[];
        this.totalProfit=0
        this.currentWorkload=0;
        this.pets=0;
    }

    newCustomer(ownerName,petName,kind,procedures){
        if(this.pets===this.capacity){
            throw new Error('Sorry, we are not able to accept more patients!')
        }else {
            let owner=this.clients.find(c=>c.name===ownerName);
            if(owner===undefined){
                owner={
                    name:ownerName,
                    pets:[],
                }
                this.clients.push(owner);
            }
            let pet=owner.pets.find(p=>p.name===petName)
                if(pet===undefined || pet.procedures.length===0){
                    if(pet===undefined){
                        pet={
                            name:petName,
                            kind:kind.toLowerCase(),
                            owner:ownerName,
                            procedures:[],
                        }
                        owner.pets.push(pet);
                    }
                    pet.procedures=procedures;
                    this.pets++;
                    this.currentWorkload=(this.pets/this.capacity)*100;
                    return `Welcome ${petName}!`;
                }
                else {
                    throw new Error(`This pet is already registered under ${ownerName} name! ${petName} is on our lists, waiting for ${pet.procedures.join(", ")}.`)


                }
            }

        }
        onLeaving(ownerName,petName){
            let client=this.clients.find(c=>c.name===ownerName);
            if(client===undefined){
                throw new Error(`Sorry,there is no such client!`)
            }else {
                let pet=client.pets.find(p=>p.name===petName);
                if(pet===undefined || pet.procedures.length===0){
                    throw new Error(`Sorry,there are no procedures for ${petName}!`);

                }else {
                    this.totalProfit+=(pet.procedures.length)*500;
                    pet.procedures=[];
                    this.pets--;
                    this.currentWorkload=(this.pets/this.capacity)*100;
                    return `Goodbye ${petName}. Stay safe!`;
                }
            }

        }
        toString(){
        let output=[
            `${this.clinicName} is ${Math.floor(this.currentWorkload)}% busy today!`,
            `Total profit: ${this.totalProfit.toFixed(2)}$`
        ]
            this.clients.sort((a,b)=>a.name.localeCompare(b.name))
                .forEach(c=>{
                    output.push(`${c.name} with:`)
                    c.pets.sort((a,b)=>a.name.localeCompare(b.name)).forEach(p=>{
                        output.push(`---${p.name} - a ${p.kind} that needs: ${p.procedures.join(", ")}`)
                    });
                });
        return output.join("\n");
        }

}