{% extends "shared/frontend/base.html" %}

{% block title %}Produkt - BMC Hub{% endblock %}

{% block extra_css %}
<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=IBM+Plex+Serif:wght@400;500;600&display=swap">
<style>
    :root {
        --product-bg-1: #f5f7fb;
        --product-bg-2: #e9f1f7;
        --product-ink: #102a43;
        --product-ink-muted: #486581;
        --product-accent: #0f4c75;
        --product-card: #ffffff;
        --product-border: rgba(15, 76, 117, 0.12);
    }

    [data-bs-theme="dark"] {
        --product-bg-1: #1b1f24;
        --product-bg-2: #20252b;
        --product-ink: #f1f5f9;
        --product-ink-muted: #b6c2d1;
        --product-card: #252b33;
        --product-border: rgba(61, 139, 253, 0.18);
    }

    .product-page {
        font-family: "Space Grotesk", sans-serif;
        color: var(--product-ink);
        background: radial-gradient(circle at 10% 10%, var(--product-bg-2), transparent 45%),
                    radial-gradient(circle at 90% 20%, rgba(15, 76, 117, 0.15), transparent 50%),
                    linear-gradient(160deg, var(--product-bg-1), var(--product-bg-2));
        border-radius: 18px;
        padding: 28px;
        box-shadow: 0 20px 40px rgba(15, 76, 117, 0.08);
        position: relative;
        overflow: hidden;
    }

    .product-page h1 {
        font-size: 2rem;
        font-weight: 700;
        margin-bottom: 6px;
    }

    .product-muted {
        color: var(--product-ink-muted);
    }

    .product-card {
        background: var(--product-card);
        border-radius: 16px;
        border: 1px solid var(--product-border);
        padding: 18px;
        box-shadow: 0 16px 30px rgba(15, 76, 117, 0.08);
    }

    .product-table th {
        background: rgba(15, 76, 117, 0.06);
    }

    .badge-soft {
        background: rgba(15, 76, 117, 0.12);
        color: var(--product-ink);
        border-radius: 999px;
        padding: 4px 10px;
        font-size: 0.75rem;
    }
</style>
{% endblock %}

{% block content %}
<div class="container-fluid py-4">
    <div class="product-page">
        <div class="d-flex flex-wrap align-items-start justify-content-between gap-3 mb-4">
            <div>
                <a href="/products" class="text-decoration-none product-muted">&#8592; Tilbage til produkter</a>
                <h1 id="productName">Produkt</h1>
                <div class="product-muted" id="productMeta"></div>
            </div>
            <div class="text-end">
                <div class="badge-soft" id="productStatus">-</div>
                <div class="fs-3 fw-semibold mt-2" id="productPrice">-</div>
                <div class="product-muted" id="productSku">-</div>
                <div class="product-muted" id="productSupplierPrice">-</div>
                <div class="badge-soft mt-2" id="productBestPrice" style="display: none;"></div>
            </div>
        </div>

        <div class="row g-3">
            <div class="col-lg-4">
                <div class="product-card h-100">
                    <div class="d-flex align-items-center justify-content-between mb-2">
                        <h5 class="mb-0">Produktnavn</h5>
                        <button class="btn btn-outline-danger btn-sm" onclick="deleteProduct()">Slet</button>
                    </div>
                    <div class="mb-3">
                        <label class="form-label">Navn</label>
                        <input type="text" class="form-control" id="productNameInput">
                    </div>
                    <button class="btn btn-outline-primary w-100 mb-3" onclick="updateProductName()">Opdater navn</button>
                    <div class="small mb-3" id="productNameMessage"></div>
                    <h5 class="mb-3">Opdater pris</h5>
                    <div class="mb-3">
                        <label class="form-label">Ny salgspris</label>
                        <input type="number" class="form-control" id="priceNewValue" step="0.01" min="0">
                    </div>
                    <div class="mb-3">
                        <label class="form-label">Note</label>
                        <input type="text" class="form-control" id="priceNote" placeholder="Årsag til prisændring">
                    </div>
                    <div class="mb-3">
                        <label class="form-label">Opdateret af</label>
                        <input type="text" class="form-control" id="priceChangedBy" placeholder="Navn">
                    </div>
                    <button class="btn btn-primary w-100" onclick="submitPriceUpdate()">Gem pris</button>
                    <div class="small mt-3" id="priceUpdateMessage"></div>
                </div>
                <div class="product-card mt-3">
                    <h5 class="mb-3">Opdater leverandør</h5>
                    <div class="mb-3">
                        <label class="form-label">Leverandør</label>
                        <input type="text" class="form-control" id="supplierName" placeholder="Leverandørnavn">
                    </div>
                    <div class="mb-3">
                        <label class="form-label">Leverandørpris</label>
                        <input type="number" class="form-control" id="supplierPrice" step="0.01" min="0">
                    </div>
                    <div class="mb-3">
                        <label class="form-label">Note</label>
                        <input type="text" class="form-control" id="supplierNote" placeholder="Årsag til ændring">
                    </div>
                    <div class="mb-3">
                        <label class="form-label">Opdateret af</label>
                        <input type="text" class="form-control" id="supplierChangedBy" placeholder="Navn">
                    </div>
                    <button class="btn btn-outline-primary w-100" onclick="submitSupplierUpdate()">Gem leverandør</button>
                    <div class="small mt-3" id="supplierUpdateMessage"></div>
                </div>
            </div>
            <div class="col-lg-8">
                <div class="product-card mb-3">
                    <h5 class="mb-3">Produktinfo</h5>
                    <div class="table-responsive">
                        <table class="table table-sm product-table mb-0">
                            <tbody id="productInfoBody">
                                <tr><td class="text-center product-muted py-3">Indlæser...</td></tr>
                            </tbody>
                        </table>
                    </div>
                </div>
                <div class="product-card mb-3">
                    <h5 class="mb-3">Pris historik</h5>
                    <div class="table-responsive">
                        <table class="table table-sm product-table mb-0">
                            <thead>
                                <tr>
                                    <th>Dato</th>
                                    <th>Type</th>
                                    <th>Gammel</th>
                                    <th>Ny</th>
                                    <th>Note</th>
                                    <th>Af</th>
                                </tr>
                            </thead>
                            <tbody id="priceHistoryBody">
                                <tr><td colspan="6" class="text-center product-muted py-3">Indlæser...</td></tr>
                            </tbody>
                        </table>
                    </div>
                </div>

                <div class="product-card">
                    <h5 class="mb-3">Tidligere salg</h5>
                    <div class="table-responsive">
                        <table class="table table-sm product-table mb-0">
                            <thead>
                                <tr>
                                    <th>Dato</th>
                                    <th>Kilde</th>
                                    <th>Beskrivelse</th>
                                    <th>Antal</th>
                                    <th>Pris</th>
                                    <th>Total</th>
                                    <th>Status</th>
                                </tr>
                            </thead>
                            <tbody id="salesHistoryBody">
                                <tr><td colspan="7" class="text-center product-muted py-3">Indlæser...</td></tr>
                            </tbody>
                        </table>
                    </div>
                </div>
                <div class="product-card mt-3">
                    <div class="d-flex flex-wrap align-items-center justify-content-between gap-2 mb-2">
                        <h5 class="mb-0">Grosister og priser</h5>
                        <div class="d-flex align-items-center gap-2">
                            <select class="form-select form-select-sm" style="max-width: 160px;" onchange="changeSupplierSort(this.value)">
                                <option value="price">Pris</option>
                                <option value="stock">Lager</option>
                                <option value="name">Navn</option>
                                <option value="updated">Opdateret</option>
                            </select>
                            <button class="btn btn-outline-secondary btn-sm" onclick="refreshSuppliersFromGateway()">Opdater fra Gateway</button>
                        </div>
                    </div>
                    <div class="table-responsive mb-3">
                        <table class="table table-sm product-table mb-0">
                            <thead>
                                <tr>
                                    <th>Grosist</th>
                                    <th>SKU</th>
                                    <th>Pris</th>
                                    <th>Lager</th>
                                    <th>Link</th>
                                    <th>Opdateret</th>
                                    <th></th>
                                </tr>
                            </thead>
                            <tbody id="supplierListBody">
                                <tr><td colspan="7" class="text-center product-muted py-3">Indlæser...</td></tr>
                            </tbody>
                        </table>
                    </div>
                    <div class="row g-2 align-items-end">
                        <div class="col-md-3">
                            <label class="form-label">Grosist</label>
                            <input type="text" class="form-control" id="supplierListName" placeholder="Navn">
                        </div>
                        <div class="col-md-2">
                            <label class="form-label">Supplier code</label>
                            <input type="text" class="form-control" id="supplierListCode" placeholder="Code">
                        </div>
                        <div class="col-md-2">
                            <label class="form-label">SKU</label>
                            <input type="text" class="form-control" id="supplierListSku" placeholder="SKU">
                            <div class="d-flex gap-2 mt-1">
                                <button class="btn btn-sm btn-outline-secondary" type="button" onclick="useProductEan()">Brug EAN</button>
                                <button class="btn btn-sm btn-outline-secondary" type="button" onclick="useProductSku()">Brug SKU</button>
                            </div>
                        </div>
                        <div class="col-md-2">
                            <label class="form-label">Pris</label>
                            <input type="number" class="form-control" id="supplierListPrice" step="0.01" min="0">
                        </div>
                        <div class="col-md-3">
                            <label class="form-label">Produktlink</label>
                            <input type="text" class="form-control" id="supplierListUrl" placeholder="https://">
                        </div>
                        <div class="col-md-2">
                            <label class="form-label">Lager</label>
                            <input type="number" class="form-control" id="supplierListStock" min="0">
                        </div>
                        <div class="col-md-2">
                            <label class="form-label">Valuta</label>
                            <input type="text" class="form-control" id="supplierListCurrency" placeholder="DKK">
                        </div>
                        <div class="col-md-3">
                            <button class="btn btn-outline-primary w-100" onclick="submitSupplierList()">Tilføj/opdater</button>
                        </div>
                        <div class="col-12">
                            <div class="small" id="supplierListMessage"></div>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>

<script>
const productId = {{ product_id }};
const productDetailState = {
    product: null
};
const supplierListState = {
    suppliers: [],
    sort: 'price'
};

function escapeHtml(value) {
    return String(value || '').replace(/[&<>"']/g, (ch) => ({
        '&': '&amp;',
        '<': '&lt;',
        '>': '&gt;',
        '"': '&quot;',
        "'": '&#39;'
    }[ch]));
}

function formatCurrency(amount) {
    return new Intl.NumberFormat('da-DK', {
        style: 'currency',
        currency: 'DKK',
        minimumFractionDigits: 0,
        maximumFractionDigits: 0
    }).format(amount || 0);
}

function formatDate(value) {
    if (!value) return '-';
    const date = new Date(value);
    if (Number.isNaN(date.getTime())) return value;
    return date.toLocaleDateString('da-DK');
}

function setMessage(message, tone = 'text-muted') {
    const el = document.getElementById('priceUpdateMessage');
    if (!el) return;
    el.className = `small ${tone}`;
    el.textContent = message;
}

function setSupplierMessage(message, tone = 'text-muted') {
    const el = document.getElementById('supplierUpdateMessage');
    if (!el) return;
    el.className = `small ${tone}`;
    el.textContent = message;
}

function setSupplierListMessage(message, tone = 'text-muted') {
    const el = document.getElementById('supplierListMessage');
    if (!el) return;
    el.className = `small ${tone}`;
    el.textContent = message;
}

function setProductNameMessage(message, tone = 'text-muted') {
    const el = document.getElementById('productNameMessage');
    if (!el) return;
    el.className = `small ${tone}`;
    el.textContent = message;
}

function updateBestPriceBadge(suppliers) {
    const badge = document.getElementById('productBestPrice');
    if (!badge) return;
    const prices = (suppliers || [])
        .map(supplier => supplier.supplier_price)
        .filter(price => typeof price === 'number');
    if (!prices.length) {
        badge.style.display = 'none';
        return;
    }
    const best = Math.min(...prices);
    badge.textContent = `Bedste pris: ${formatCurrency(best)}`;
    badge.style.display = 'inline-flex';
}

function renderProductInfo(product) {
    const body = document.getElementById('productInfoBody');
    if (!body) return;
    const rows = [
        ['EAN', product.ean],
        ['Type', product.type],
        ['Status', product.status],
        ['SKU intern', product.sku_internal],
        ['Producent', product.manufacturer],
        ['Leverandør', product.supplier_name],
        ['Leverandør-SKU', product.supplier_sku],
        ['Leverandørpris', product.supplier_price != null ? formatCurrency(product.supplier_price) : null],
        ['Salgspris', product.sales_price != null ? formatCurrency(product.sales_price) : null],
        ['Kostpris', product.cost_price != null ? formatCurrency(product.cost_price) : null],
        ['Moms', product.vat_rate != null ? `${product.vat_rate}%` : null],
        ['Faktureringsinterval', product.billing_period],
        ['Auto forny', product.auto_renew ? 'Ja' : 'Nej'],
        ['Minimum binding', product.minimum_term_months != null ? `${product.minimum_term_months} mdr.` : null]
    ];
    body.innerHTML = rows.map(([label, value]) => `
        <tr>
            <th>${label}</th>
            <td>${value != null && value !== '' ? escapeHtml(value) : '-'}</td>
        </tr>
    `).join('');
}

function prefillSupplierSku(product) {
    const skuField = document.getElementById('supplierListSku');
    if (!skuField || skuField.value) return;
    if (product.ean) {
        skuField.value = product.ean;
    } else if (product.sku_internal) {
        skuField.value = product.sku_internal;
    }
}

async function loadProductDetail() {
    try {
        const res = await fetch(`/api/v1/products/${productId}`);
        if (!res.ok) throw new Error('Kunne ikke hente produkt');
        const product = await res.json();
        document.getElementById('productName').textContent = product.name || 'Produkt';
        document.getElementById('productMeta').textContent = [
            product.manufacturer,
            product.type,
            product.supplier_name
        ].filter(Boolean).join(' • ');
        document.getElementById('productStatus').textContent = product.status || '-';
        document.getElementById('productPrice').textContent = product.sales_price != null ? formatCurrency(product.sales_price) : '-';
        document.getElementById('productSku').textContent = product.sku_internal || '-';
        document.getElementById('productSupplierPrice').textContent = product.supplier_price != null
            ? `Leverandør: ${formatCurrency(product.supplier_price)}`
            : 'Leverandørpris: -';
        document.getElementById('priceNewValue').value = product.sales_price != null ? product.sales_price : '';
        document.getElementById('supplierName').value = product.supplier_name || '';
        document.getElementById('supplierPrice').value = product.supplier_price != null ? product.supplier_price : '';
        document.getElementById('productNameInput').value = product.name || '';
        productDetailState.product = product;
        renderProductInfo(product);
        prefillSupplierSku(product);
    } catch (e) {
        setMessage(e.message || 'Fejl ved indlæsning', 'text-danger');
    }
}

async function loadPriceHistory() {
    const tbody = document.getElementById('priceHistoryBody');
    try {
        const res = await fetch(`/api/v1/products/${productId}/price-history`);
        if (!res.ok) throw new Error('Kunne ikke hente pris historik');
        const history = await res.json();
        if (!history.length) {
            tbody.innerHTML = '<tr><td colspan="6" class="text-center product-muted py-3">Ingen historik</td></tr>';
            return;
        }
        tbody.innerHTML = history.map(entry => `
            <tr>
                <td>${formatDate(entry.changed_at)}</td>
                <td>${entry.price_type === 'supplier_price' ? 'Leverandør' : 'Salgspris'}</td>
                <td>${entry.old_price != null ? formatCurrency(entry.old_price) : '-'}</td>
                <td>${entry.new_price != null ? formatCurrency(entry.new_price) : '-'}</td>
                <td>${escapeHtml(entry.note || '-')}</td>
                <td>${escapeHtml(entry.changed_by || '-')}</td>
            </tr>
        `).join('');
    } catch (e) {
        tbody.innerHTML = `<tr><td colspan="6" class="text-center text-danger py-3">${escapeHtml(e.message || 'Fejl')}</td></tr>`;
    }
}

async function loadSalesHistory() {
    const tbody = document.getElementById('salesHistoryBody');
    try {
        const res = await fetch(`/api/v1/products/${productId}/sales-history`);
        if (!res.ok) throw new Error('Kunne ikke hente salgs historik');
        const history = await res.json();
        if (!history.length) {
            tbody.innerHTML = '<tr><td colspan="7" class="text-center product-muted py-3">Ingen salg fundet</td></tr>';
            return;
        }
        tbody.innerHTML = history.map(entry => `
            <tr>
                <td>${formatDate(entry.line_date)}</td>
                <td>${entry.source === 'subscription' ? 'Abonnement' : 'Sag salg'}</td>
                <td>${escapeHtml(entry.description || '-')}</td>
                <td>${entry.quantity != null ? entry.quantity : '-'}</td>
                <td>${entry.unit_price != null ? formatCurrency(entry.unit_price) : '-'}</td>
                <td>${entry.total_amount != null ? formatCurrency(entry.total_amount) : '-'}</td>
                <td>${escapeHtml(entry.status || '-')}</td>
            </tr>
        `).join('');
    } catch (e) {
        tbody.innerHTML = `<tr><td colspan="7" class="text-center text-danger py-3">${escapeHtml(e.message || 'Fejl')}</td></tr>`;
    }
}

async function loadSupplierList() {
    const tbody = document.getElementById('supplierListBody');
    try {
        const res = await fetch(`/api/v1/products/${productId}/suppliers`);
        if (!res.ok) throw new Error('Kunne ikke hente grosister');
        const suppliers = await res.json();
        supplierListState.suppliers = Array.isArray(suppliers) ? suppliers : [];
        updateBestPriceBadge(supplierListState.suppliers);
        const sorted = getSortedSuppliers();
        if (!sorted.length) {
            tbody.innerHTML = '<tr><td colspan="7" class="text-center product-muted py-3">Ingen grosister endnu</td></tr>';
            return;
        }
        tbody.innerHTML = sorted.map(entry => {
            const link = entry.supplier_product_url || entry.supplier_url;
            return `
                <tr>
                    <td>${escapeHtml(entry.supplier_name || entry.supplier_code || '-')}</td>
                    <td>${escapeHtml(entry.supplier_sku || '-')}</td>
                    <td>${entry.supplier_price != null ? formatCurrency(entry.supplier_price) : '-'}</td>
                    <td>${entry.supplier_stock != null ? entry.supplier_stock : '-'}</td>
                    <td>${link ? `<a href="${escapeHtml(link)}" target="_blank" rel="noopener">Link</a>` : '-'}</td>
                    <td>${entry.last_updated_at ? formatDate(entry.last_updated_at) : '-'}</td>
                    <td><button class="btn btn-sm btn-outline-danger" onclick="deleteSupplier(${entry.id})">Slet</button></td>
                </tr>
            `;
        }).join('');
    } catch (e) {
        tbody.innerHTML = `<tr><td colspan="7" class="text-center text-danger py-3">${escapeHtml(e.message || 'Fejl')}</td></tr>`;
    }
}

function getSortedSuppliers() {
    const suppliers = supplierListState.suppliers || [];
    const sort = supplierListState.sort;
    if (sort === 'name') {
        return [...suppliers].sort((a, b) => String(a.supplier_name || '').localeCompare(String(b.supplier_name || '')));
    }
    if (sort === 'stock') {
        return [...suppliers].sort((a, b) => (b.supplier_stock || 0) - (a.supplier_stock || 0));
    }
    if (sort === 'updated') {
        return [...suppliers].sort((a, b) => String(b.last_updated_at || '').localeCompare(String(a.last_updated_at || '')));
    }
    return [...suppliers].sort((a, b) => (a.supplier_price || 0) - (b.supplier_price || 0));
}

function changeSupplierSort(value) {
    supplierListState.sort = value;
    loadSupplierList();
}

async function submitSupplierList() {
    const payload = {
        supplier_name: document.getElementById('supplierListName').value.trim() || null,
        supplier_code: document.getElementById('supplierListCode').value.trim() || null,
        supplier_sku: document.getElementById('supplierListSku').value.trim() || null,
        supplier_price: document.getElementById('supplierListPrice').value ? Number(document.getElementById('supplierListPrice').value) : null,
        supplier_currency: document.getElementById('supplierListCurrency').value.trim() || null,
        supplier_stock: document.getElementById('supplierListStock').value ? Number(document.getElementById('supplierListStock').value) : null,
        supplier_product_url: document.getElementById('supplierListUrl').value.trim() || null,
        source: 'manual'
    };

    try {
        const res = await fetch(`/api/v1/products/${productId}/suppliers`, {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(payload)
        });
        if (!res.ok) {
            const error = await res.json();
            throw new Error(error.detail || 'Kunne ikke gemme grosist');
        }
        await res.json();
        setSupplierListMessage('Grosist gemt', 'text-success');
        await loadSupplierList();
    } catch (e) {
        setSupplierListMessage(e.message || 'Fejl', 'text-danger');
    }
}

async function deleteSupplier(supplierId) {
    if (!confirm('Vil du slette denne grosist?')) return;
    try {
        const res = await fetch(`/api/v1/products/${productId}/suppliers/${supplierId}`, { method: 'DELETE' });
        if (!res.ok) {
            const error = await res.json();
            throw new Error(error.detail || 'Sletning fejlede');
        }
        await res.json();
        await loadSupplierList();
    } catch (e) {
        setSupplierListMessage(e.message || 'Fejl', 'text-danger');
    }
}

function useProductEan() {
    const skuField = document.getElementById('supplierListSku');
    if (!skuField || !productDetailState.product) return;
    skuField.value = productDetailState.product.ean || '';
}

function useProductSku() {
    const skuField = document.getElementById('supplierListSku');
    if (!skuField || !productDetailState.product) return;
    skuField.value = productDetailState.product.sku_internal || '';
}

async function refreshSuppliersFromGateway() {
    setSupplierListMessage('Opdaterer fra Gateway...', 'text-muted');
    try {
        const res = await fetch(`/api/v1/products/${productId}/suppliers/refresh`, { method: 'POST' });
        if (!res.ok) {
            const error = await res.json();
            throw new Error(error.detail || 'Opdatering fejlede');
        }
        const payload = await res.json();
        const saved = Number(payload.saved || 0);
        const queries = Array.isArray(payload.queries) ? payload.queries : [];
        const queryText = queries.length
            ? ` (forsog: ${queries.map((query) => {
                if (query.supplier_code) {
                    return `${query.supplier_code}:${query.q}`;
                }
                return query.q;
            }).join(', ')})`
            : '';
        if (!saved) {
            setSupplierListMessage(`Ingen grosister fundet i Gateway${queryText}`, 'text-warning');
        } else {
            setSupplierListMessage(`Grosister opdateret (${saved})${queryText}`, 'text-success');
        }
        await loadSupplierList();
    } catch (e) {
        setSupplierListMessage(e.message || 'Fejl', 'text-danger');
    }
}

async function updateProductName() {
    const name = document.getElementById('productNameInput').value.trim();
    if (!name) {
        setProductNameMessage('Angiv et navn', 'text-danger');
        return;
    }
    try {
        const res = await fetch(`/api/v1/products/${productId}`, {
            method: 'PATCH',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({ name })
        });
        if (!res.ok) {
            const error = await res.json();
            throw new Error(error.detail || 'Opdatering fejlede');
        }
        await res.json();
        setProductNameMessage('Navn opdateret', 'text-success');
        await loadProductDetail();
    } catch (e) {
        setProductNameMessage(e.message || 'Fejl', 'text-danger');
    }
}

async function deleteProduct() {
    if (!confirm('Vil du slette dette produkt?')) return;
    try {
        const res = await fetch(`/api/v1/products/${productId}`, { method: 'DELETE' });
        if (!res.ok) {
            const error = await res.json();
            throw new Error(error.detail || 'Sletning fejlede');
        }
        window.location.href = '/products';
    } catch (e) {
        setProductNameMessage(e.message || 'Fejl', 'text-danger');
    }
}

async function submitPriceUpdate() {
    const newPrice = document.getElementById('priceNewValue').value;
    const note = document.getElementById('priceNote').value.trim();
    const changedBy = document.getElementById('priceChangedBy').value.trim();

    if (!newPrice) {
        setMessage('Angiv ny pris', 'text-danger');
        return;
    }

    try {
        const res = await fetch(`/api/v1/products/${productId}/price`, {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({
                new_price: Number(newPrice),
                note: note || null,
                changed_by: changedBy || null
            })
        });
        if (!res.ok) {
            const error = await res.json();
            throw new Error(error.detail || 'Prisopdatering fejlede');
        }
        await res.json();
        setMessage('Pris opdateret', 'text-success');
        await loadProductDetail();
        await loadPriceHistory();
    } catch (e) {
        setMessage(e.message || 'Fejl ved opdatering', 'text-danger');
    }
}

async function submitSupplierUpdate() {
    const supplierName = document.getElementById('supplierName').value.trim();
    const supplierPriceValue = document.getElementById('supplierPrice').value;
    const note = document.getElementById('supplierNote').value.trim();
    const changedBy = document.getElementById('supplierChangedBy').value.trim();

    try {
        const res = await fetch(`/api/v1/products/${productId}/supplier`, {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({
                supplier_name: supplierName || null,
                supplier_price: supplierPriceValue ? Number(supplierPriceValue) : null,
                note: note || null,
                changed_by: changedBy || null
            })
        });
        if (!res.ok) {
            const error = await res.json();
            throw new Error(error.detail || 'Opdatering af leverandør fejlede');
        }
        await res.json();
        setSupplierMessage('Leverandør opdateret', 'text-success');
        await loadProductDetail();
        await loadPriceHistory();
    } catch (e) {
        setSupplierMessage(e.message || 'Fejl ved opdatering', 'text-danger');
    }
}

document.addEventListener('DOMContentLoaded', () => {
    loadProductDetail();
    loadPriceHistory();
    loadSalesHistory();
    loadSupplierList();
});
</script>
{% endblock %}