sam-kd/estimate/common/calculation.js

// jQuery 의존성 확인
if (typeof jQuery === 'undefined') {
    console.error('jQuery is required for calculation.js');
}

// 계산 로직을 위한 기본 클래스
class BaseCalculator {
    constructor() {
        this.cleanNumber = this.cleanNumber.bind(this);
        this.formatNumber = this.formatNumber.bind(this);
    }

    // 숫자만 남기는 헬퍼
    cleanNumber(str) {
        return Number(String(str).replace(/[^0-9.-]/g, '')) || 0;
    }

    // 3자리마다 콤마 찍되, 먼저 소수점 이하는 반올림 처리
    formatNumber(num) {
        const value = typeof num === 'string'
            ? parseFloat(num.replace(/,/g, ''))
            : num;
        const rounded = Math.round(value || 0);
        return rounded.toLocaleString();
    }

    // 행별 합계 계산 (기본 구현)
    calculateRowTotal(row) {
        throw new Error('calculateRowTotal must be implemented by subclass');
    }
}

// 견적서 계산 클래스
class EstimateCalculator extends BaseCalculator {
    calculateRowTotal(row) {
        row = $(row);

        const suInput = row.find('.su-input'); 
        const areaLengthInput = row.find('.area-length-input');
        const areaPriceInput = row.find('.area-price-input');
        const unitPriceInput = row.find('.unit-price-input');

        const su = suInput.length ? this.cleanNumber(suInput.val()) : 1;
        const areaLength = areaLengthInput.length ? this.cleanNumber(areaLengthInput.val()) : 1;
        const areaPrice = areaPriceInput.length ? this.cleanNumber(areaPriceInput.val()) : 1;
        let unitPrice = unitPriceInput.length ? this.cleanNumber(unitPriceInput.val()) : 1;

        const roundedAreaPrice = parseFloat(areaPrice.toFixed(2));

        if (roundedAreaPrice > 0) {
            unitPrice = Math.ceil(areaLength * roundedAreaPrice);
            unitPriceInput.val(this.formatNumber(unitPrice));
        }

        let totalPrice;
        if (!areaLength && !areaPrice) {
            totalPrice = su * unitPrice;
        } else if (areaLength && !areaPrice) {
            totalPrice = areaLength * unitPrice;
        } else {
            totalPrice = su * unitPrice;
        }
        
        const totalCell = row.find('.total-price');
        if (totalCell.length) {
            totalCell.text(this.formatNumber(totalPrice));
        }

        return totalPrice;
    }
}

// 거래명세표 계산 클래스
class TransactionCalculator extends BaseCalculator {
    calculateRowTotal(row) {
        row = $(row);

        const suInput = row.find('.su-input');
        const unitPriceInput = row.find('.unit-price-input');
        const supplyPriceCell = row.find('.supply-price');
        const taxCell = row.find('.tax-price');
        const totalCell = row.find('.total-price');

        const su = suInput.length ? this.cleanNumber(suInput.val()) : 1;
        const unitPrice = unitPriceInput.length ? this.cleanNumber(unitPriceInput.val()) : 0;

        // 공급가액 계산
        const supplyPrice = su * unitPrice;
        
        // 부가세 계산 (10%)
        const tax = Math.round(supplyPrice * 0.1);
        
        // 합계 계산
        const totalPrice = supplyPrice + tax;

        // 각 셀에 값 표시
        if (supplyPriceCell.length) {
            supplyPriceCell.text(this.formatNumber(supplyPrice));
        }
        if (taxCell.length) {
            taxCell.text(this.formatNumber(tax));
        }
        if (totalCell.length) {
            totalCell.text(this.formatNumber(totalPrice));
        }

        return totalPrice;
    }
}

// 계산기 팩토리
class CalculatorFactory {
    static createCalculator(type) {
        switch(type) {
            case 'estimate':
                return new EstimateCalculator();
            case 'transaction':
                return new TransactionCalculator();
            default:
                throw new Error('Unknown calculator type');
        }
    }
}

// 전역 계산기 인스턴스
let calculator = null;

// 계산기 초기화 함수
function initializeCalculator(type) {
    calculator = CalculatorFactory.createCalculator(type);
}

// 기존 함수들을 새로운 클래스 기반으로 래핑
function calculateRowTotal(row) {
    if (!calculator) {
        console.error('Calculator not initialized');
        return 0;
    }
    return calculator.calculateRowTotal(row);
}

function calculateSubtotalBySerial(serialNumber) {
    if (!calculator) {
        console.error('Calculator not initialized');
        return 0;
    }

    let subtotal = 0;
    const rows = $(`.calculation-row[data-serial="${serialNumber}"]`);
    
    rows.each(function() {
        subtotal += calculator.calculateRowTotal($(this));
    });

    const subtotalCells = $(`.subtotal-cell[data-serial="${serialNumber}"]`);
    if (subtotalCells.length > 0) {
        subtotalCells.each(function() {
            $(this).text(calculator.formatNumber(subtotal));
        });
    }

    return subtotal;
}

function calculateAllSubtotals() {
    if (!calculator) {
        console.error('Calculator not initialized');
        return 0;
    }

    let grandTotal = 0;
    const uniqueSerials = new Set();
    $('.calculation-row').each(function() {
        uniqueSerials.add($(this).data('serial'));
    });

    uniqueSerials.forEach(function(serialNumber) {
        grandTotal += calculateSubtotalBySerial(serialNumber);
    });

    return grandTotal;
}