statement.ts

// type PlayTypeT = 'comedy' | 'tragedy';

type PlaysT = {
    [playID: string]: { name: string, type: string }
}

type InvoiceT = {
    customer: string,
    performances: {
        playID: string,
        audience: number
    }[]
}

function statement(invoice: InvoiceT, plays: PlaysT): string {
    let totalAmount = 0;
    let volumeCredits = 0;
    let result = `청구 내역 (고객명: ${invoice.customer})\n`;

    const format = new Intl.NumberFormat("en-US", { style: 'currency', currency: 'USD', minimumFractionDigits: 2 }).format

    for (let i = 0; i < invoice.performances.length; i++) {
        const perf = invoice.performances[i]
        const play = plays[perf.playID];

        let thisAmount = 0;

        switch (play.type) {
            case 'tragedy':
                thisAmount = 40000;
                if (perf.audience > 30) {
                    thisAmount += 1000 * (perf.audience - 30);
                } 
                break;
            case "comedy":
                thisAmount = 30000;
                if (perf.audience > 20) {
                    thisAmount += 10000 + 500 * (perf.audience - 20);
                }
                thisAmount += 300 * perf.audience;
                break;
            default:
                throw new Error('알 수 없는 장르: '+ play.type);
        }
        volumeCredits += Math.max(perf.audience - 30, 0);
        if (play.type === 'comedy') {
            volumeCredits += Math.floor(perf.audience / 5);
        }
        result += `  ${play.name}: ${format(thisAmount/100)} (${perf.audience}석)\n`;
        totalAmount += thisAmount;
    }

    result += `총액: ${format(totalAmount/100)}\n`
    result += `적립 포인트: ${volumeCredits}점`
    return result;
}

export default statement;