@model PowderCoating.Application.DTOs.Accounting.CreateBillDto

@{
    ViewData["Title"] = "New Bill";
    ViewData["PageIcon"] = "bi-receipt-cutoff";
    ViewData["PageHelpTitle"] = "New Bill";
    ViewData["PageHelpContent"] = "Record a vendor invoice to track what you owe. Bills start as Draft (editable) and become Open once confirmed. Partial payments are supported — each payment reduces the balance. Link line items to expense accounts and optionally to specific jobs for cost tracking.";
    string? fromPoNumber = ViewBag.FromPoNumber as string;
    int? fromPoId = ViewBag.FromPoId as int?;
}

<div class="d-flex justify-content-between align-items-center mb-4">
    <div>
        @if (!string.IsNullOrEmpty(fromPoNumber))
        {
            <p class="text-muted mb-0 small"><i class="bi bi-box-arrow-in-down text-success me-1"></i> Pre-filled from <strong>@fromPoNumber</strong> — review and save</p>
        }
    </div>
    @if (fromPoId.HasValue)
    {
        <a asp-controller="PurchaseOrders" asp-action="Details" asp-route-id="@fromPoId" class="btn btn-sm btn-outline-secondary"><i class="bi bi-arrow-left"></i></a>
    }
    else
    {
        <a asp-action="Index" class="btn btn-sm btn-outline-secondary"><i class="bi bi-arrow-left"></i></a>
    }
</div>

<form asp-action="Create" method="post" enctype="multipart/form-data" id="billForm">
    @Html.AntiForgeryToken()
    @if (Model.PurchaseOrderId.HasValue)
    {
        <input type="hidden" name="PurchaseOrderId" value="@Model.PurchaseOrderId" />
    }
    <div asp-validation-summary="ModelOnly" class="alert alert-danger mb-3"></div>

    <div class="row g-4">
        <!-- Left column: Bill header -->
        <div class="col-lg-8">
            <div class="card shadow-sm mb-4">
                <div class="card-header fw-semibold d-flex align-items-center justify-content-between">
                    <div class="d-flex align-items-center gap-2">
                        Bill Details
                        <a tabindex="0" class="help-icon" role="button"
                           data-bs-toggle="popover" data-bs-placement="right" data-bs-trigger="focus"
                           data-bs-title="Bill Details"
                           data-bs-content="Vendor: who you're paying. AP Account: the liability account this bill posts to (e.g. Accounts Payable). Bill Date: date on the vendor's invoice. Due Date: when payment is due — drives overdue status. Vendor Invoice #: the vendor's own reference number for reconciliation. Payment Terms auto-fill from the vendor record.">
                            <i class="bi bi-question-circle"></i>
                        </a>
                    </div>
                    <div class="d-flex align-items-center gap-1">
                        <button type="button" class="btn btn-sm btn-outline-secondary" data-bs-toggle="modal" data-bs-target="#scanReceiptModal">
                            <i class="bi bi-camera me-1"></i>Upload and Process Receipt Image
                        </button>
                        <a tabindex="0" class="help-icon" role="button"
                           data-bs-toggle="popover" data-bs-placement="left" data-bs-trigger="focus"
                           data-bs-title="Upload and Process Receipt Image"
                           data-bs-content="Upload a photo or PDF of a vendor receipt or invoice. AI will automatically extract the vendor name, date, invoice number, and line items and pre-fill this form for you. The file will also be saved as an attachment on the bill.">
                            <i class="bi bi-question-circle"></i>
                        </a>
                    </div>
                </div>
                <div class="card-body">
                    <div class="row g-3">
                        <div class="col-md-6">
                            <label asp-for="VendorId" class="form-label fw-medium">Vendor <span class="text-danger">*</span></label>
                            <select asp-for="VendorId" asp-items="ViewBag.Vendors" class="form-select" id="vendorSelect"
                                    data-quick-add-url="/Vendors/Create" data-quick-add-title="Add New Vendor">
                                <option value="">— Select Vendor —</option>
                                <option value="__new__">+ Add New Vendor…</option>
                            </select>
                            <span asp-validation-for="VendorId" class="text-danger small"></span>
                        </div>
                        <div class="col-md-6">
                            <label asp-for="APAccountId" class="form-label fw-medium">AP Account <span class="text-danger">*</span></label>
                            <select asp-for="APAccountId" asp-items="ViewBag.APAccounts" class="form-select"></select>
                        </div>
                        <div class="col-md-6">
                            <label asp-for="BillDate" class="form-label fw-medium">Bill Date <span class="text-danger">*</span></label>
                            <input asp-for="BillDate" type="date" class="form-control" />
                            <span asp-validation-for="BillDate" class="text-danger small"></span>
                        </div>
                        <div class="col-md-6">
                            <label asp-for="DueDate" class="form-label fw-medium">Due Date</label>
                            <input asp-for="DueDate" type="date" class="form-control" />
                        </div>
                        <div class="col-md-6">
                            <label asp-for="VendorInvoiceNumber" class="form-label fw-medium">Vendor Invoice #</label>
                            <input asp-for="VendorInvoiceNumber" class="form-control" placeholder="Their invoice number" />
                        </div>
                        <div class="col-md-6">
                            <label asp-for="Terms" class="form-label fw-medium">Payment Terms</label>
                            <input asp-for="Terms" class="form-control" placeholder="e.g. Net 30" id="termsInput" />
                        </div>
                        <div class="col-12">
                            <label asp-for="Memo" class="form-label fw-medium">Memo</label>
                            <textarea asp-for="Memo" class="form-control" rows="2" placeholder="Optional notes"></textarea>
                        </div>
                        <div class="col-12">
                            <label for="receiptFile" class="form-label fw-medium">Attach Receipt / Document</label>
                            <input type="file" name="receiptFile" id="receiptFile" class="form-control"
                                   accept=".jpg,.jpeg,.png,.gif,.webp,.pdf" />
                            <div class="form-text">JPG, PNG, GIF, WebP, or PDF — up to 10 MB.</div>
                        </div>
                    </div>
                </div>
            </div>

            <!-- Line items -->
            <div class="card shadow-sm">
                <div class="card-header d-flex justify-content-between align-items-center">
                    <div class="d-flex align-items-center gap-2">
                        <span class="fw-semibold">Line Items</span>
                        <a tabindex="0" class="help-icon" role="button"
                           data-bs-toggle="popover" data-bs-placement="right" data-bs-trigger="focus"
                           data-bs-title="Line Items"
                           data-bs-content="Each line maps to an expense account (e.g. Supplies, Materials, Subcontractors). Optionally link a line to a Job to track costs against specific work orders. Qty × Unit Price = Amount. Use multiple lines to split one bill across different expense categories.">
                            <i class="bi bi-question-circle"></i>
                        </a>
                    </div>
                    <button type="button" class="btn btn-sm btn-outline-primary" onclick="addLineItem()">
                        <i class="bi bi-plus-lg me-1"></i>Add Line
                    </button>
                </div>
                <div class="card-body p-0">
                    <table class="table table-sm mb-0" id="lineItemsTable">
                        <thead class="table-light">
                            <tr>
                                <th style="min-width:180px">Account</th>
                                <th>Description</th>
                                <th style="width:80px">Job</th>
                                <th style="width:70px">Qty</th>
                                <th style="width:110px">Unit Price</th>
                                <th style="width:110px" class="text-end">Amount</th>
                                <th style="width:40px"></th>
                            </tr>
                        </thead>
                        <tbody id="lineItemsBody">
                        </tbody>
                    </table>
                </div>
            </div>
        </div>

        <!-- Right column: Totals -->
        <div class="col-lg-4">
            <div class="card shadow-sm sticky-top" style="top:80px">
                <div class="card-header fw-semibold d-flex align-items-center gap-2">
                    Summary
                    <a tabindex="0" class="help-icon" role="button"
                       data-bs-toggle="popover" data-bs-placement="left" data-bs-trigger="focus"
                       data-bs-title="Bill Summary"
                       data-bs-content="Tax % is applied to the line-item subtotal. The resulting Total is the full amount owed to the vendor. Partial payments are allowed — each payment recorded reduces the balance due until the bill is fully paid.">
                        <i class="bi bi-question-circle"></i>
                    </a>
                </div>
                <div class="card-body">
                    <div class="d-flex justify-content-between mb-2">
                        <span class="text-muted">Subtotal</span>
                        <span id="subtotalDisplay">$0.00</span>
                    </div>
                    <div class="mb-3">
                        <label asp-for="TaxPercent" class="form-label text-muted small">Tax %</label>
                        <input asp-for="TaxPercent" type="number" step="0.01" min="0" max="100"
                               class="form-control form-control-sm" id="taxPercent" value="0" oninput="recalcTotals()" />
                    </div>
                    <div class="d-flex justify-content-between mb-2">
                        <span class="text-muted">Tax</span>
                        <span id="taxDisplay">$0.00</span>
                    </div>
                    <hr />
                    <div class="d-flex justify-content-between fw-bold fs-5">
                        <span>Total</span>
                        <span id="totalDisplay">$0.00</span>
                    </div>

                    <!-- Pay now toggle -->
                    <hr />
                    <div class="form-check form-switch mb-3">
                        <input class="form-check-input" type="checkbox" id="payNowToggle" name="payNow" value="true" />
                        <label class="form-check-label fw-medium" for="payNowToggle">I already paid this</label>
                    </div>
                    <div id="payNowFields" class="d-none">
                        <div class="mb-2">
                            <label class="form-label small fw-medium">Payment Date</label>
                            <input type="date" name="paymentDate" class="form-control form-control-sm"
                                   value="@DateTime.Today.ToString("yyyy-MM-dd")" />
                        </div>
                        <div class="mb-2">
                            <label class="form-label small fw-medium">Payment Method</label>
                            <select name="paymentMethod" class="form-select form-select-sm">
                                @foreach (var item in (IEnumerable<Microsoft.AspNetCore.Mvc.Rendering.SelectListItem>)ViewBag.PaymentMethods)
                                {
                                    <option value="@item.Value">@item.Text</option>
                                }
                            </select>
                        </div>
                        <div class="mb-2">
                            <label class="form-label small fw-medium">Bank / Cash Account <span class="text-danger">*</span></label>
                            <select name="bankAccountId" class="form-select form-select-sm" id="payNowBankAccount">
                                <option value="">— Select Account —</option>
                                @foreach (var item in (IEnumerable<Microsoft.AspNetCore.Mvc.Rendering.SelectListItem>)ViewBag.BankAccounts)
                                {
                                    <option value="@item.Value">@item.Text</option>
                                }
                            </select>
                        </div>
                        <div class="mb-2">
                            <label class="form-label small fw-medium">Check #</label>
                            <input type="text" name="checkNumber" class="form-control form-control-sm" placeholder="Optional" />
                        </div>
                        <div class="mb-3">
                            <label class="form-label small fw-medium">Memo</label>
                            <input type="text" name="paymentMemo" class="form-control form-control-sm" placeholder="Optional" />
                        </div>
                    </div>

                    <div class="d-grid gap-2 mt-2">
                        <button type="submit" class="btn btn-primary" id="saveBillBtn">
                            <i class="bi bi-check-lg me-1"></i>Save Bill
                        </button>
                        <a asp-action="Index" class="btn btn-outline-secondary">Cancel</a>
                    </div>
                </div>
            </div>
        </div>
    </div>
</form>

<!-- Line item template (hidden) -->
<template id="lineItemTemplate">
    <tr class="line-item-row">
        <td>
            <select class="form-select form-select-sm account-select" name="LineItems[INDEX].AccountId" required>
                <option value="">— Account —</option>
                @foreach (var item in (IEnumerable<Microsoft.AspNetCore.Mvc.Rendering.SelectListItem>)ViewBag.ExpenseAccounts)
                {
                    <option value="@item.Value">@item.Text</option>
                }
            </select>
        </td>
        <td><input type="text" class="form-control form-control-sm" name="LineItems[INDEX].Description" placeholder="Description" /></td>
        <td>
            <select class="form-select form-select-sm" name="LineItems[INDEX].JobId">
                <option value="">—</option>
                @foreach (var item in (IEnumerable<Microsoft.AspNetCore.Mvc.Rendering.SelectListItem>)ViewBag.Jobs)
                {
                    <option value="@item.Value">@item.Text</option>
                }
            </select>
        </td>
        <td><input type="number" step="0.001" min="0.001" value="1" class="form-control form-control-sm qty-input" name="LineItems[INDEX].Quantity" oninput="recalcRow(this)" /></td>
        <td><input type="number" step="0.01" min="0" value="0" class="form-control form-control-sm price-input" name="LineItems[INDEX].UnitPrice" oninput="recalcRow(this)" /></td>
        <td class="text-end align-middle"><span class="row-amount fw-medium">$0.00</span></td>
        <td class="align-middle">
            <button type="button" class="btn btn-sm btn-outline-danger" onclick="removeLineItem(this)" tabindex="-1">
                <i class="bi bi-x"></i>
            </button>
        </td>
    </tr>
</template>

<!-- Scan Receipt Modal -->
<div class="modal fade" id="scanReceiptModal" tabindex="-1" aria-labelledby="scanReceiptModalLabel" aria-hidden="true">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title" id="scanReceiptModalLabel"><i class="bi bi-camera me-2"></i>Upload and Process Receipt Image</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body">
                <p class="text-muted small">Upload a photo, image, or PDF of a vendor receipt or invoice. The AI will extract the vendor name, date, invoice number, and line items and pre-fill this form.</p>
                <div class="mb-3">
                    <label for="scanReceiptFile" class="form-label fw-medium">Receipt / Invoice Document</label>
                    <input type="file" id="scanReceiptFile" class="form-control" accept=".jpg,.jpeg,.png,.gif,.webp,.pdf" />
                    <div class="form-text">JPG, PNG, GIF, WebP, or PDF — up to 10 MB.</div>
                </div>
                <div id="scanReceiptStatus" class="text-muted small mt-2"></div>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Cancel</button>
                <button type="button" class="btn btn-primary" id="scanReceiptUploadBtn">
                    <i class="bi bi-camera me-1"></i>Scan &amp; Fill
                </button>
            </div>
        </div>
    </div>
</div>

@section Scripts {
    @{await Html.RenderPartialAsync("_ValidationScriptsPartial");}
    <script>
        let lineCount = 0;

        /**
         * opts: { accountId, description, qty, price }
         * Backwards-compatible: addLineItem(42) still works.
         */
        function addLineItem(opts) {
            if (typeof opts === 'number') opts = { accountId: opts };
            opts = opts || {};

            const template = document.getElementById('lineItemTemplate');
            const clone = template.content.cloneNode(true);
            const row = clone.querySelector('tr');

            row.innerHTML = row.innerHTML.replaceAll('INDEX', lineCount);

            if (opts.accountId) {
                const sel = row.querySelector('.account-select');
                if (sel) sel.value = String(opts.accountId);
            }
            if (opts.description != null) {
                const desc = row.querySelector('[name$=".Description"]');
                if (desc) desc.value = opts.description;
            }
            if (opts.qty != null) {
                const qtyIn = row.querySelector('.qty-input');
                if (qtyIn) qtyIn.value = opts.qty;
            }
            if (opts.price != null) {
                const priceIn = row.querySelector('.price-input');
                if (priceIn) priceIn.value = opts.price;
            }

            document.getElementById('lineItemsBody').appendChild(clone);
            lineCount++;

            // Recalc the row amount after appending
            const appended = document.getElementById('lineItemsBody').lastElementChild;
            if (appended) recalcRowEl(appended);
        }

        function removeLineItem(btn) {
            btn.closest('tr').remove();
            recalcTotals();
        }

        function recalcRow(input) {
            recalcRowEl(input.closest('tr'));
        }

        function recalcRowEl(row) {
            const qty   = parseFloat(row.querySelector('.qty-input').value)   || 0;
            const price = parseFloat(row.querySelector('.price-input').value) || 0;
            row.querySelector('.row-amount').textContent = '$' + (qty * price).toFixed(2);
            recalcTotals();
        }

        function recalcTotals() {
            let subtotal = 0;
            document.querySelectorAll('.row-amount').forEach(el => {
                subtotal += parseFloat(el.textContent.replace('$', '')) || 0;
            });
            const taxPct = parseFloat(document.getElementById('taxPercent').value) || 0;
            const tax    = subtotal * (taxPct / 100);

            document.getElementById('subtotalDisplay').textContent = '$' + subtotal.toFixed(2);
            document.getElementById('taxDisplay').textContent      = '$' + tax.toFixed(2);
            document.getElementById('totalDisplay').textContent    = '$' + (subtotal + tax).toFixed(2);
        }

        // Pay now toggle
        document.getElementById('payNowToggle').addEventListener('change', function () {
            const fields = document.getElementById('payNowFields');
            const btn    = document.getElementById('saveBillBtn');
            if (this.checked) {
                fields.classList.remove('d-none');
                btn.innerHTML = '<i class="bi bi-cash me-1"></i>Save &amp; Mark Paid';
                btn.classList.replace('btn-primary', 'btn-success');
            } else {
                fields.classList.add('d-none');
                btn.innerHTML = '<i class="bi bi-check-lg me-1"></i>Save Bill';
                btn.classList.replace('btn-success', 'btn-primary');
            }
        });

        // Load vendor defaults
        document.getElementById('vendorSelect').addEventListener('change', async function () {
            const vendorId = this.value;
            if (!vendorId) return;
            try {
                const resp = await fetch(`/Bills/GetVendorDefaults?vendorId=${vendorId}`);
                const data = await resp.json();
                if (data.terms) document.getElementById('termsInput').value = data.terms;
            } catch {}
        });

        // Init with line items from model (pre-filled from PO or empty)
        @foreach (var li in Model.LineItems)
        {
            <text>addLineItem({ accountId: @(li.AccountId.HasValue ? li.AccountId.ToString() : "null"), description: @Html.Raw(System.Text.Json.JsonSerializer.Serialize(li.Description ?? "")), qty: @li.Quantity, price: @li.UnitPrice });</text>
        }
        if (lineCount === 0) addLineItem();

        // ── AI Auto-suggest Account on description blur ───────────────────────
        // Keyword shortcuts — handle common cases with zero API cost
        const _keywordMap = [
            { words: ['electric','power','utility','gas','water','internet','phone','telecom'], hint: 'utilities' },
            { words: ['powder','paint','coat','material','supply','supplies','chemical','resin'], hint: 'materials' },
            { words: ['freight','shipping','delivery','postage','courier','ups','fedex','usps'], hint: 'freight' },
            { words: ['tool','equipment','machine','compressor','gun','booth','oven'], hint: 'equipment' },
            { words: ['office','paper','printer','ink','toner','staple'], hint: 'office' },
            { words: ['labor','subcontract','contract','wage','service fee'], hint: 'subcontractors' },
            { words: ['insurance','premium','policy'], hint: 'insurance' },
            { words: ['rent','lease','mortgage'], hint: 'rent' },
            { words: ['advertising','marketing','promo'], hint: 'advertising' },
        ];

        // Session cache: description (lowercased) → { accountId, accountName }
        const _suggestCache = new Map();

        function _keywordGuess(description) {
            const lower = description.toLowerCase();
            for (const entry of _keywordMap) {
                if (entry.words.some(w => lower.includes(w))) return entry.hint;
            }
            return null;
        }

        function _findAccountByHint(hint, accountSel) {
            for (const opt of accountSel.options) {
                if (!opt.value) continue;
                if (opt.text.toLowerCase().includes(hint)) return { id: opt.value, name: opt.text };
            }
            return null;
        }

        function _applyAccountSuggestion(row, accountId, accountName) {
            const sel = row.querySelector('.account-select');
            if (!sel || sel.value) return; // already chosen by user
            sel.value = String(accountId);
            // Show a subtle inline hint
            let hint = row.querySelector('.ai-account-hint');
            if (!hint) {
                hint = document.createElement('div');
                hint.className = 'ai-account-hint text-muted small mt-1';
                sel.parentNode.appendChild(hint);
            }
            hint.innerHTML = `<i class="bi bi-stars text-info"></i> AI: ${accountName}`;
        }

        async function _suggestAccountForRow(row) {
            const descInput = row.querySelector('[name$=".Description"]');
            const accountSel = row.querySelector('.account-select');
            if (!descInput || !accountSel) return;

            const description = descInput.value.trim();
            if (description.length < 8) return;  // too short to be meaningful
            if (accountSel.value) return;          // user already picked one

            // 1. Check in-session cache
            const cacheKey = description.toLowerCase();
            if (_suggestCache.has(cacheKey)) {
                const cached = _suggestCache.get(cacheKey);
                _applyAccountSuggestion(row, cached.accountId, cached.accountName);
                return;
            }

            // 2. Try keyword shortcut (free)
            const hint = _keywordGuess(description);
            if (hint) {
                const match = _findAccountByHint(hint, accountSel);
                if (match) {
                    _suggestCache.set(cacheKey, { accountId: match.id, accountName: match.name });
                    _applyAccountSuggestion(row, match.id, match.name);
                    return;
                }
            }

            // 3. Fall back to AI
            const vendorSel = document.getElementById('vendorSelect');
            const vendorText = vendorSel.options[vendorSel.selectedIndex]?.text ?? '';
            const amount = parseFloat(row.querySelector('.price-input')?.value) || 0;

            // Show a subtle loading indicator on the account select
            let hint2 = row.querySelector('.ai-account-hint');
            if (!hint2) {
                hint2 = document.createElement('div');
                hint2.className = 'ai-account-hint text-muted small mt-1';
                accountSel.parentNode.appendChild(hint2);
            }
            hint2.innerHTML = '<span class="spinner-border spinner-border-sm" style="width:.75rem;height:.75rem"></span> Thinking…';

            try {
                const token = document.querySelector('input[name="__RequestVerificationToken"]')?.value;
                const resp = await fetch('/Bills/SuggestAccount', {
                    method: 'POST',
                    headers: { 'Content-Type': 'application/json', 'RequestVerificationToken': token ?? '' },
                    body: JSON.stringify({ vendorName: vendorText, description, amount, availableAccounts: [] })
                });
                const data = await resp.json();
                if (data.success && data.suggestedAccountId) {
                    _suggestCache.set(cacheKey, { accountId: data.suggestedAccountId, accountName: data.suggestedAccountName });
                    _applyAccountSuggestion(row, data.suggestedAccountId, data.suggestedAccountName);
                } else {
                    hint2.remove();
                }
            } catch {
                hint2?.remove();
            }
        }

        // Event delegation — works for dynamically added rows
        document.getElementById('lineItemsBody').addEventListener('blur', function (e) {
            if (e.target.matches('[name$=".Description"]')) {
                _suggestAccountForRow(e.target.closest('tr'));
            }
        }, true); // capture phase so blur bubbles

        // ── Scan Receipt ─────────────────────────────────────────────────────
        document.getElementById('scanReceiptUploadBtn').addEventListener('click', async function () {
            const fileInput = document.getElementById('scanReceiptFile');
            if (!fileInput.files.length) { alert('Please select a file.'); return; }

            const btn = this;
            const statusEl = document.getElementById('scanReceiptStatus');
            btn.disabled = true;
            btn.innerHTML = '<span class="spinner-border spinner-border-sm me-1"></span>Scanning...';
            statusEl.textContent = '';

            const formData = new FormData();
            formData.append('receiptImage', fileInput.files[0]);

            // Include antiforgery token
            const token = document.querySelector('input[name="__RequestVerificationToken"]')?.value;
            if (token) formData.append('__RequestVerificationToken', token);

            try {
                const resp = await fetch('/Bills/ScanReceipt', { method: 'POST', body: formData });
                const data = await resp.json();

                if (!data.success) {
                    statusEl.textContent = data.errorMessage || 'Scan failed.';
                    return;
                }

                // Auto-fill bill header — try to match vendor name to dropdown
                if (data.vendorName) {
                    const vendorSel = document.getElementById('vendorSelect');
                    if (vendorSel && !vendorSel.value) {
                        const needle = data.vendorName.toLowerCase().trim();
                        let bestOption = null;
                        for (const opt of vendorSel.options) {
                            if (!opt.value) continue;
                            const hay = opt.text.toLowerCase().trim();
                            // Exact match first, then starts-with, then contains
                            if (hay === needle) { bestOption = opt; break; }
                            if (!bestOption && (hay.startsWith(needle) || needle.startsWith(hay))) bestOption = opt;
                            if (!bestOption && hay.includes(needle)) bestOption = opt;
                        }
                        if (bestOption) {
                            vendorSel.value = bestOption.value;
                            vendorSel.dispatchEvent(new Event('change'));
                        } else {
                            // No match — put the name in Memo so user knows what the AI saw
                            const memo = document.querySelector('[name="Memo"]');
                            if (memo && !memo.value) memo.value = data.vendorName;
                        }
                    }
                }
                if (data.date) {
                    const billDateIn = document.querySelector('[name="BillDate"]');
                    if (billDateIn) billDateIn.value = data.date;
                }
                if (data.invoiceNumber) {
                    const invNumIn = document.querySelector('[name="VendorInvoiceNumber"]');
                    if (invNumIn && !invNumIn.value) invNumIn.value = data.invoiceNumber;
                }

                // Clear existing line items and add scanned ones
                if (data.lineItems && data.lineItems.length > 0) {
                    document.getElementById('lineItemsBody').innerHTML = '';
                    lineCount = 0;
                    for (const li of data.lineItems) {
                        addLineItem({
                            accountId: li.suggestedAccountId || 0,
                            description: li.description || '',
                            qty: 1,
                            price: li.amount || 0
                        });
                    }
                }

                // Copy scanned file into the receipt attachment input so it gets saved with the bill
                const scannedFile = fileInput.files[0];
                const receiptFileInput = document.getElementById('receiptFile');
                if (scannedFile && receiptFileInput) {
                    const dt = new DataTransfer();
                    dt.items.add(scannedFile);
                    receiptFileInput.files = dt.files;
                    // Show the filename so the user knows it will be attached
                    const hint = receiptFileInput.nextElementSibling;
                    if (hint) hint.textContent = `\u2713 Will attach: ${scannedFile.name}`;
                }

                // Close modal
                const modal = bootstrap.Modal.getInstance(document.getElementById('scanReceiptModal'));
                if (modal) modal.hide();

                statusEl.textContent = 'Scan complete — review and adjust as needed.';
            } catch (e) {
                statusEl.textContent = 'Error connecting to AI service.';
            } finally {
                btn.disabled = false;
                btn.innerHTML = '<i class="bi bi-camera me-1"></i>Scan &amp; Fill';
            }
        });
    </script>
}