// 한약 재고관리 시스템 - Frontend JavaScript

$(document).ready(function() {
    // 페이지 네비게이션
    $('.sidebar .nav-link').on('click', function(e) {
        e.preventDefault();
        const page = $(this).data('page');

        // Active 상태 변경
        $('.sidebar .nav-link').removeClass('active');
        $(this).addClass('active');

        // 페이지 전환
        $('.main-content').removeClass('active');
        $(`#${page}`).addClass('active');

        // 페이지별 데이터 로드
        loadPageData(page);
    });

    // 초기 데이터 로드
    loadPageData('dashboard');

    // 페이지별 데이터 로드 함수
    function loadPageData(page) {
        switch(page) {
            case 'dashboard':
                loadDashboard();
                break;
            case 'patients':
                loadPatients();
                break;
            case 'purchase':
                loadPurchaseReceipts();
                break;
            case 'formulas':
                loadFormulas();
                break;
            case 'compound':
                loadCompounds();
                loadPatientsForSelect();
                loadFormulasForSelect();
                break;
            case 'inventory':
                loadInventory();
                break;
            case 'herbs':
                loadHerbs();
                break;
        }
    }

    // 대시보드 데이터 로드
    function loadDashboard() {
        // 환자 수
        $.get('/api/patients', function(response) {
            if (response.success) {
                $('#totalPatients').text(response.data.length);
            }
        });

        // 재고 현황
        $.get('/api/inventory/summary', function(response) {
            if (response.success) {
                $('#totalHerbs').text(response.data.length);
                $('#inventoryValue').text(formatCurrency(response.summary.total_value));
            }
        });

        // TODO: 오늘 조제 수, 최근 조제 내역
    }

    // 환자 목록 로드
    function loadPatients() {
        $.get('/api/patients', function(response) {
            if (response.success) {
                const tbody = $('#patientsList');
                tbody.empty();

                response.data.forEach(patient => {
                    tbody.append(`
                        <tr>
                            <td>${patient.name}</td>
                            <td>${patient.phone}</td>
                            <td>${patient.gender === 'M' ? '남' : patient.gender === 'F' ? '여' : '-'}</td>
                            <td>${patient.birth_date || '-'}</td>
                            <td>${patient.notes || '-'}</td>
                            <td>
                                <button class="btn btn-sm btn-outline-primary">
                                    <i class="bi bi-pencil"></i>
                                </button>
                            </td>
                        </tr>
                    `);
                });
            }
        });
    }

    // 환자 등록
    $('#savePatientBtn').on('click', function() {
        const patientData = {
            name: $('#patientName').val(),
            phone: $('#patientPhone').val(),
            jumin_no: $('#patientJumin').val(),
            gender: $('#patientGender').val(),
            birth_date: $('#patientBirth').val(),
            address: $('#patientAddress').val(),
            notes: $('#patientNotes').val()
        };

        $.ajax({
            url: '/api/patients',
            method: 'POST',
            contentType: 'application/json',
            data: JSON.stringify(patientData),
            success: function(response) {
                if (response.success) {
                    alert('환자가 등록되었습니다.');
                    $('#patientModal').modal('hide');
                    $('#patientForm')[0].reset();
                    loadPatients();
                }
            },
            error: function(xhr) {
                alert('오류: ' + xhr.responseJSON.error);
            }
        });
    });

    // 처방 목록 로드
    function loadFormulas() {
        $.get('/api/formulas', function(response) {
            if (response.success) {
                const tbody = $('#formulasList');
                tbody.empty();

                response.data.forEach(formula => {
                    tbody.append(`
                        <tr>
                            <td>${formula.formula_code || '-'}</td>
                            <td>${formula.formula_name}</td>
                            <td>${formula.base_cheop}첩</td>
                            <td>${formula.base_pouches}파우치</td>
                            <td>
                                <button class="btn btn-sm btn-outline-info view-ingredients"
                                        data-id="${formula.formula_id}">
                                    <i class="bi bi-eye"></i> 보기
                                </button>
                            </td>
                            <td>
                                <button class="btn btn-sm btn-outline-primary">
                                    <i class="bi bi-pencil"></i>
                                </button>
                            </td>
                        </tr>
                    `);
                });

                // 구성 약재 보기
                $('.view-ingredients').on('click', function() {
                    const formulaId = $(this).data('id');
                    $.get(`/api/formulas/${formulaId}/ingredients`, function(response) {
                        if (response.success) {
                            let ingredientsList = response.data.map(ing =>
                                `${ing.herb_name}: ${ing.grams_per_cheop}g`
                            ).join(', ');
                            alert('구성 약재:\n' + ingredientsList);
                        }
                    });
                });
            }
        });
    }

    // 처방 구성 약재 추가 (모달)
    let formulaIngredientCount = 0;
    $('#addFormulaIngredientBtn').on('click', function() {
        formulaIngredientCount++;
        $('#formulaIngredients').append(`
            <tr data-row="${formulaIngredientCount}">
                <td>
                    <select class="form-control form-control-sm herb-select">
                        <option value="">약재 선택</option>
                    </select>
                </td>
                <td>
                    <input type="number" class="form-control form-control-sm grams-input"
                           min="0.1" step="0.1" placeholder="0.0">
                </td>
                <td>
                    <input type="text" class="form-control form-control-sm notes-input">
                </td>
                <td>
                    <button type="button" class="btn btn-sm btn-outline-danger remove-ingredient">
                        <i class="bi bi-x"></i>
                    </button>
                </td>
            </tr>
        `);

        // 약재 목록 로드
        const selectElement = $(`#formulaIngredients tr[data-row="${formulaIngredientCount}"] .herb-select`);
        loadHerbsForSelect(selectElement);

        // 삭제 버튼 이벤트
        $(`#formulaIngredients tr[data-row="${formulaIngredientCount}"] .remove-ingredient`).on('click', function() {
            $(this).closest('tr').remove();
        });
    });

    // 처방 저장
    $('#saveFormulaBtn').on('click', function() {
        const ingredients = [];
        $('#formulaIngredients tr').each(function() {
            const herbId = $(this).find('.herb-select').val();
            const grams = $(this).find('.grams-input').val();

            if (herbId && grams) {
                ingredients.push({
                    herb_item_id: parseInt(herbId),
                    grams_per_cheop: parseFloat(grams),
                    notes: $(this).find('.notes-input').val()
                });
            }
        });

        const formulaData = {
            formula_code: $('#formulaCode').val(),
            formula_name: $('#formulaName').val(),
            formula_type: $('#formulaType').val(),
            base_cheop: parseInt($('#baseCheop').val()),
            base_pouches: parseInt($('#basePouches').val()),
            description: $('#formulaDescription').val(),
            ingredients: ingredients
        };

        $.ajax({
            url: '/api/formulas',
            method: 'POST',
            contentType: 'application/json',
            data: JSON.stringify(formulaData),
            success: function(response) {
                if (response.success) {
                    alert('처방이 등록되었습니다.');
                    $('#formulaModal').modal('hide');
                    $('#formulaForm')[0].reset();
                    $('#formulaIngredients').empty();
                    loadFormulas();
                }
            },
            error: function(xhr) {
                alert('오류: ' + xhr.responseJSON.error);
            }
        });
    });

    // 조제 관리
    $('#newCompoundBtn').on('click', function() {
        $('#compoundForm').show();
        $('#compoundEntryForm')[0].reset();
        $('#compoundIngredients').empty();
    });

    $('#cancelCompoundBtn').on('click', function() {
        $('#compoundForm').hide();
    });

    // 제수 변경 시 첩수 자동 계산
    $('#jeCount').on('input', function() {
        const jeCount = parseFloat($(this).val()) || 0;
        const cheopTotal = jeCount * 20;
        const pouchTotal = jeCount * 30;

        $('#cheopTotal').val(cheopTotal);
        $('#pouchTotal').val(pouchTotal);

        // 약재별 총 용량 재계산
        updateIngredientTotals();
    });

    // 처방 선택 시 구성 약재 로드
    $('#compoundFormula').on('change', function() {
        const formulaId = $(this).val();
        if (!formulaId) {
            $('#compoundIngredients').empty();
            return;
        }

        $.get(`/api/formulas/${formulaId}/ingredients`, function(response) {
            if (response.success) {
                $('#compoundIngredients').empty();

                response.data.forEach(ing => {
                    const cheopTotal = parseFloat($('#cheopTotal').val()) || 0;
                    const totalGrams = ing.grams_per_cheop * cheopTotal;

                    $('#compoundIngredients').append(`
                        <tr data-herb-id="${ing.herb_item_id}">
                            <td>${ing.herb_name}</td>
                            <td>
                                <input type="number" class="form-control form-control-sm grams-per-cheop"
                                       value="${ing.grams_per_cheop}" min="0.1" step="0.1">
                            </td>
                            <td class="total-grams">${totalGrams.toFixed(1)}</td>
                            <td class="stock-status">확인중...</td>
                            <td>
                                <button type="button" class="btn btn-sm btn-outline-danger remove-compound-ingredient">
                                    <i class="bi bi-x"></i>
                                </button>
                            </td>
                        </tr>
                    `);
                });

                // 재고 확인
                checkStockForCompound();

                // 용량 변경 이벤트
                $('.grams-per-cheop').on('input', updateIngredientTotals);

                // 삭제 버튼 이벤트
                $('.remove-compound-ingredient').on('click', function() {
                    $(this).closest('tr').remove();
                });
            }
        });
    });

    // 약재별 총 용량 업데이트
    function updateIngredientTotals() {
        const cheopTotal = parseFloat($('#cheopTotal').val()) || 0;

        $('#compoundIngredients tr').each(function() {
            const gramsPerCheop = parseFloat($(this).find('.grams-per-cheop').val()) || 0;
            const totalGrams = gramsPerCheop * cheopTotal;
            $(this).find('.total-grams').text(totalGrams.toFixed(1));
        });

        checkStockForCompound();
    }

    // 재고 확인
    function checkStockForCompound() {
        $('#compoundIngredients tr').each(function() {
            const herbId = $(this).data('herb-id');
            const totalGrams = parseFloat($(this).find('.total-grams').text()) || 0;
            const $stockStatus = $(this).find('.stock-status');

            // TODO: API 호출로 실제 재고 확인
            $stockStatus.text('재고 확인 필요');
        });
    }

    // 조제 약재 추가
    $('#addIngredientBtn').on('click', function() {
        const newRow = $(`
            <tr>
                <td>
                    <select class="form-control form-control-sm herb-select-compound">
                        <option value="">약재 선택</option>
                    </select>
                </td>
                <td>
                    <input type="number" class="form-control form-control-sm grams-per-cheop"
                           min="0.1" step="0.1" placeholder="0.0">
                </td>
                <td class="total-grams">0.0</td>
                <td class="stock-status">-</td>
                <td>
                    <button type="button" class="btn btn-sm btn-outline-danger remove-compound-ingredient">
                        <i class="bi bi-x"></i>
                    </button>
                </td>
            </tr>
        `);

        $('#compoundIngredients').append(newRow);

        // 약재 목록 로드
        loadHerbsForSelect(newRow.find('.herb-select-compound'));

        // 이벤트 바인딩
        newRow.find('.grams-per-cheop').on('input', updateIngredientTotals);
        newRow.find('.remove-compound-ingredient').on('click', function() {
            $(this).closest('tr').remove();
        });
        newRow.find('.herb-select-compound').on('change', function() {
            const herbId = $(this).val();
            $(this).closest('tr').attr('data-herb-id', herbId);
            updateIngredientTotals();
        });
    });

    // 조제 실행
    $('#compoundEntryForm').on('submit', function(e) {
        e.preventDefault();

        const ingredients = [];
        $('#compoundIngredients tr').each(function() {
            const herbId = $(this).data('herb-id');
            const gramsPerCheop = parseFloat($(this).find('.grams-per-cheop').val());
            const totalGrams = parseFloat($(this).find('.total-grams').text());

            if (herbId && gramsPerCheop) {
                ingredients.push({
                    herb_item_id: parseInt(herbId),
                    grams_per_cheop: gramsPerCheop,
                    total_grams: totalGrams
                });
            }
        });

        const compoundData = {
            patient_id: $('#compoundPatient').val() ? parseInt($('#compoundPatient').val()) : null,
            formula_id: $('#compoundFormula').val() ? parseInt($('#compoundFormula').val()) : null,
            je_count: parseFloat($('#jeCount').val()),
            cheop_total: parseFloat($('#cheopTotal').val()),
            pouch_total: parseFloat($('#pouchTotal').val()),
            ingredients: ingredients
        };

        $.ajax({
            url: '/api/compounds',
            method: 'POST',
            contentType: 'application/json',
            data: JSON.stringify(compoundData),
            success: function(response) {
                if (response.success) {
                    alert(`조제가 완료되었습니다.\n원가: ${formatCurrency(response.total_cost)}`);
                    $('#compoundForm').hide();
                    loadCompounds();
                }
            },
            error: function(xhr) {
                alert('오류: ' + xhr.responseJSON.error);
            }
        });
    });

    // 조제 내역 로드
    function loadCompounds() {
        // TODO: 조제 내역 API 구현 필요
        $('#compoundsList').html('<tr><td colspan="7" class="text-center">조제 내역이 없습니다.</td></tr>');
    }

    // 재고 현황 로드
    function loadInventory() {
        $.get('/api/inventory/summary', function(response) {
            if (response.success) {
                const tbody = $('#inventoryList');
                tbody.empty();

                response.data.forEach(item => {
                    tbody.append(`
                        <tr>
                            <td>${item.insurance_code || '-'}</td>
                            <td>${item.herb_name}</td>
                            <td>${item.total_quantity.toFixed(1)}</td>
                            <td>${item.lot_count}</td>
                            <td>${item.avg_price ? formatCurrency(item.avg_price) : '-'}</td>
                            <td>${formatCurrency(item.total_value)}</td>
                        </tr>
                    `);
                });
            }
        });
    }

    // 약재 목록 로드
    function loadHerbs() {
        $.get('/api/herbs', function(response) {
            if (response.success) {
                const tbody = $('#herbsList');
                tbody.empty();

                response.data.forEach(herb => {
                    tbody.append(`
                        <tr>
                            <td>${herb.insurance_code || '-'}</td>
                            <td>${herb.herb_name}</td>
                            <td>${herb.specification || '-'}</td>
                            <td>${herb.current_stock ? herb.current_stock.toFixed(1) + 'g' : '0g'}</td>
                            <td>
                                <button class="btn btn-sm btn-outline-primary">
                                    <i class="bi bi-pencil"></i>
                                </button>
                            </td>
                        </tr>
                    `);
                });
            }
        });
    }

    // 입고장 목록 로드
    function loadPurchaseReceipts() {
        const startDate = $('#purchaseStartDate').val();
        const endDate = $('#purchaseEndDate').val();
        const supplierId = $('#purchaseSupplier').val();

        let url = '/api/purchase-receipts?';
        if (startDate) url += `start_date=${startDate}&`;
        if (endDate) url += `end_date=${endDate}&`;
        if (supplierId) url += `supplier_id=${supplierId}`;

        $.get(url, function(response) {
            if (response.success) {
                const tbody = $('#purchaseReceiptsList');
                tbody.empty();

                if (response.data.length === 0) {
                    tbody.append('<tr><td colspan="7" class="text-center">입고장이 없습니다.</td></tr>');
                    return;
                }

                response.data.forEach(receipt => {
                    tbody.append(`
                        <tr>
                            <td>${receipt.receipt_date}</td>
                            <td>${receipt.supplier_name}</td>
                            <td>${receipt.line_count}개</td>
                            <td>${receipt.total_quantity ? receipt.total_quantity.toLocaleString() + 'g' : '-'}</td>
                            <td>${receipt.total_amount ? formatCurrency(receipt.total_amount) : '-'}</td>
                            <td>${receipt.source_file || '-'}</td>
                            <td>
                                <button class="btn btn-sm btn-outline-info view-receipt" data-id="${receipt.receipt_id}">
                                    <i class="bi bi-eye"></i> 상세
                                </button>
                                <button class="btn btn-sm btn-outline-danger delete-receipt" data-id="${receipt.receipt_id}">
                                    <i class="bi bi-trash"></i>
                                </button>
                            </td>
                        </tr>
                    `);
                });

                // 이벤트 바인딩
                $('.view-receipt').on('click', function() {
                    const receiptId = $(this).data('id');
                    viewReceiptDetail(receiptId);
                });

                $('.delete-receipt').on('click', function() {
                    const receiptId = $(this).data('id');
                    if (confirm('정말 이 입고장을 삭제하시겠습니까? 사용되지 않은 재고만 삭제 가능합니다.')) {
                        deleteReceipt(receiptId);
                    }
                });
            }
        });
    }

    // 입고장 상세 보기
    function viewReceiptDetail(receiptId) {
        $.get(`/api/purchase-receipts/${receiptId}`, function(response) {
            if (response.success) {
                const data = response.data;
                let linesHtml = '';

                data.lines.forEach(line => {
                    linesHtml += `
                        <tr>
                            <td>${line.herb_name}</td>
                            <td>${line.insurance_code || '-'}</td>
                            <td>${line.origin_country || '-'}</td>
                            <td>${line.quantity_g}g</td>
                            <td>${formatCurrency(line.unit_price_per_g)}</td>
                            <td>${formatCurrency(line.line_total)}</td>
                            <td>${line.current_stock}g</td>
                        </tr>
                    `;
                });

                const modalHtml = `
                    <div class="modal fade" id="receiptDetailModal" tabindex="-1">
                        <div class="modal-dialog modal-lg">
                            <div class="modal-content">
                                <div class="modal-header">
                                    <h5 class="modal-title">입고장 상세</h5>
                                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                                </div>
                                <div class="modal-body">
                                    <div class="mb-3">
                                        <strong>입고일:</strong> ${data.receipt_date}<br>
                                        <strong>공급업체:</strong> ${data.supplier_name}<br>
                                        <strong>총 금액:</strong> ${formatCurrency(data.total_amount)}
                                    </div>
                                    <table class="table table-sm">
                                        <thead>
                                            <tr>
                                                <th>약재명</th>
                                                <th>보험코드</th>
                                                <th>원산지</th>
                                                <th>수량</th>
                                                <th>단가</th>
                                                <th>금액</th>
                                                <th>현재고</th>
                                            </tr>
                                        </thead>
                                        <tbody>
                                            ${linesHtml}
                                        </tbody>
                                    </table>
                                </div>
                            </div>
                        </div>
                    </div>
                `;

                // 기존 모달 제거
                $('#receiptDetailModal').remove();
                $('body').append(modalHtml);
                $('#receiptDetailModal').modal('show');
            }
        });
    }

    // 입고장 삭제
    function deleteReceipt(receiptId) {
        $.ajax({
            url: `/api/purchase-receipts/${receiptId}`,
            method: 'DELETE',
            success: function(response) {
                if (response.success) {
                    alert(response.message);
                    loadPurchaseReceipts();
                }
            },
            error: function(xhr) {
                alert('오류: ' + xhr.responseJSON.error);
            }
        });
    }

    // 입고장 조회 버튼
    $('#searchPurchaseBtn').on('click', function() {
        loadPurchaseReceipts();
    });

    // 입고장 업로드
    $('#purchaseUploadForm').on('submit', function(e) {
        e.preventDefault();

        const formData = new FormData();
        const fileInput = $('#purchaseFile')[0];

        if (fileInput.files.length === 0) {
            alert('파일을 선택해주세요.');
            return;
        }

        formData.append('file', fileInput.files[0]);

        $('#uploadResult').html('<div class="alert alert-info">업로드 중...</div>');

        $.ajax({
            url: '/api/upload/purchase',
            method: 'POST',
            data: formData,
            processData: false,
            contentType: false,
            success: function(response) {
                if (response.success) {
                    let summaryHtml = '';
                    if (response.summary) {
                        summaryHtml = `<br>
                            <small>
                                형식: ${response.summary.format}<br>
                                처리: ${response.summary.processed_rows}개 라인<br>
                                품목: ${response.summary.total_items}종<br>
                                수량: ${response.summary.total_quantity}<br>
                                금액: ${response.summary.total_amount}
                            </small>`;
                    }

                    $('#uploadResult').html(
                        `<div class="alert alert-success">
                            <i class="bi bi-check-circle"></i> ${response.message}
                            ${summaryHtml}
                        </div>`
                    );
                    $('#purchaseUploadForm')[0].reset();

                    // 입고장 목록 새로고침
                    loadPurchaseReceipts();
                }
            },
            error: function(xhr) {
                $('#uploadResult').html(
                    `<div class="alert alert-danger">
                        <i class="bi bi-x-circle"></i> 오류: ${xhr.responseJSON.error}
                    </div>`
                );
            }
        });
    });

    // 검색 기능
    $('#patientSearch').on('keyup', function() {
        const value = $(this).val().toLowerCase();
        $('#patientsList tr').filter(function() {
            $(this).toggle($(this).text().toLowerCase().indexOf(value) > -1);
        });
    });

    $('#inventorySearch').on('keyup', function() {
        const value = $(this).val().toLowerCase();
        $('#inventoryList tr').filter(function() {
            $(this).toggle($(this).text().toLowerCase().indexOf(value) > -1);
        });
    });

    // 헬퍼 함수들
    function loadPatientsForSelect() {
        $.get('/api/patients', function(response) {
            if (response.success) {
                const select = $('#compoundPatient');
                select.empty().append('<option value="">환자를 선택하세요</option>');

                response.data.forEach(patient => {
                    select.append(`<option value="${patient.patient_id}">${patient.name} (${patient.phone})</option>`);
                });
            }
        });
    }

    function loadFormulasForSelect() {
        $.get('/api/formulas', function(response) {
            if (response.success) {
                const select = $('#compoundFormula');
                select.empty().append('<option value="">처방을 선택하세요</option>');

                response.data.forEach(formula => {
                    select.append(`<option value="${formula.formula_id}">${formula.formula_name}</option>`);
                });
            }
        });
    }

    function loadHerbsForSelect(selectElement) {
        $.get('/api/herbs', function(response) {
            if (response.success) {
                selectElement.empty().append('<option value="">약재 선택</option>');

                response.data.forEach(herb => {
                    selectElement.append(`<option value="${herb.herb_item_id}">${herb.herb_name}</option>`);
                });
            }
        });
    }

    function formatCurrency(amount) {
        if (amount === null || amount === undefined) return '0원';
        return new Intl.NumberFormat('ko-KR', {
            style: 'currency',
            currency: 'KRW'
        }).format(amount);
    }
});