{% extends "base.html" %}

{% block title %}Connect Your Bank - Fin{% endblock %}

{% block content %}
<style>
    .connect-page-header {
        margin-bottom: 28px;
    }

    .connect-page-header h1 {
        font-size: 22px;
        font-weight: 600;
        margin-bottom: 6px;
    }

    .connect-page-header p {
        color: var(--text-secondary);
        font-size: 14px;
    }

    .connect-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 24px;
        align-items: start;
    }

    @media (max-width: 768px) {
        .connect-grid {
            grid-template-columns: 1fr;
        }
    }

    .connect-card {
        background: var(--bg-secondary);
        border: 1px solid var(--border);
        border-radius: 10px;
        overflow: hidden;
        box-shadow: var(--shadow-sm);
    }

    .connect-card-header {
        padding: 20px 20px 16px;
        border-bottom: 1px solid var(--border);
    }

    .connect-card-header h2 {
        font-size: 16px;
        font-weight: 600;
        margin-bottom: 4px;
    }

    .connect-card-header p {
        font-size: 13px;
        color: var(--text-secondary);
    }

    .connect-card-body {
        padding: 20px;
    }

    /* Drop zone */
    .drop-zone {
        border: 2px dashed var(--border);
        border-radius: 8px;
        padding: 40px 24px;
        text-align: center;
        cursor: pointer;
        transition: all 0.2s;
        position: relative;
        background: var(--bg-tertiary);
    }

    .drop-zone:hover,
    .drop-zone.drag-over {
        border-color: var(--accent-blue);
        background: rgba(37, 99, 235, 0.04);
    }

    [data-theme="dark"] .drop-zone:hover,
    [data-theme="dark"] .drop-zone.drag-over {
        background: rgba(88, 166, 255, 0.06);
    }

    .drop-zone-icon {
        font-size: 36px;
        margin-bottom: 12px;
        display: block;
    }

    .drop-zone-label {
        font-size: 14px;
        font-weight: 500;
        color: var(--text-primary);
        margin-bottom: 4px;
    }

    .drop-zone-sub {
        font-size: 12px;
        color: var(--text-muted);
    }

    .drop-zone input[type="file"] {
        position: absolute;
        inset: 0;
        opacity: 0;
        cursor: pointer;
        width: 100%;
        height: 100%;
    }

    /* Preview card */
    .csv-preview-card {
        display: none;
        margin-top: 16px;
        background: var(--bg-tertiary);
        border: 1px solid var(--border);
        border-radius: 8px;
        overflow: hidden;
    }

    .csv-preview-card.visible {
        display: block;
    }

    .csv-preview-header {
        padding: 12px 16px;
        border-bottom: 1px solid var(--border);
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
    }

    .csv-preview-summary {
        font-size: 13px;
        font-weight: 500;
        color: var(--text-primary);
    }

    .csv-preview-bank {
        font-size: 11px;
        background: rgba(37, 99, 235, 0.12);
        color: var(--accent-blue);
        padding: 2px 8px;
        border-radius: 10px;
        font-weight: 600;
    }

    .csv-preview-table {
        width: 100%;
        border-collapse: collapse;
        font-size: 12px;
    }

    .csv-preview-table th {
        text-align: left;
        padding: 8px 12px;
        font-size: 11px;
        text-transform: uppercase;
        letter-spacing: 0.4px;
        color: var(--text-muted);
        background: var(--bg-tertiary);
        border-bottom: 1px solid var(--border);
    }

    .csv-preview-table td {
        padding: 7px 12px;
        border-bottom: 1px solid var(--border);
        color: var(--text-secondary);
    }

    .csv-preview-table tr:last-child td {
        border-bottom: none;
    }

    .csv-preview-table .amount-pos { color: var(--accent-green); }
    .csv-preview-table .amount-neg { color: var(--accent-red); }

    .csv-preview-actions {
        padding: 12px 16px;
        display: flex;
        gap: 10px;
        align-items: center;
        border-top: 1px solid var(--border);
    }

    /* Column mapping UI (shown when bank is not detected) */
    .col-mapping-form {
        display: none;
        margin-top: 16px;
        background: var(--bg-tertiary);
        border: 1px solid var(--border);
        border-radius: 8px;
        padding: 16px;
    }

    .col-mapping-form.visible {
        display: block;
    }

    .col-mapping-form p {
        font-size: 13px;
        color: var(--text-secondary);
        margin-bottom: 12px;
    }

    .col-mapping-row {
        display: grid;
        grid-template-columns: 120px 1fr;
        gap: 8px;
        align-items: center;
        margin-bottom: 8px;
    }

    .col-mapping-row label {
        font-size: 12px;
        font-weight: 500;
        color: var(--text-primary);
        text-transform: uppercase;
        letter-spacing: 0.4px;
    }

    .col-mapping-row select {
        background: var(--bg-secondary);
        border: 1px solid var(--border);
        color: var(--text-primary);
        border-radius: 5px;
        padding: 5px 8px;
        font-size: 13px;
        width: 100%;
    }

    /* Bank instructions accordion */
    .bank-instructions {
        margin-top: 20px;
        border-top: 1px solid var(--border);
        padding-top: 16px;
    }

    .bank-instructions-label {
        font-size: 12px;
        color: var(--text-muted);
        text-transform: uppercase;
        letter-spacing: 0.5px;
        margin-bottom: 8px;
        font-weight: 500;
    }

    .bank-accordion-item {
        border: 1px solid var(--border);
        border-radius: 6px;
        margin-bottom: 6px;
        overflow: hidden;
    }

    .bank-accordion-trigger {
        width: 100%;
        text-align: left;
        background: none;
        border: none;
        padding: 10px 14px;
        cursor: pointer;
        display: flex;
        justify-content: space-between;
        align-items: center;
        font-size: 13px;
        font-weight: 500;
        color: var(--text-primary);
        transition: background 0.15s;
    }

    .bank-accordion-trigger:hover {
        background: var(--bg-hover);
    }

    .bank-accordion-chevron {
        font-size: 10px;
        color: var(--text-muted);
        transition: transform 0.2s;
    }

    .bank-accordion-item.open .bank-accordion-chevron {
        transform: rotate(180deg);
    }

    .bank-accordion-body {
        display: none;
        padding: 10px 14px 12px;
        font-size: 12px;
        color: var(--text-secondary);
        border-top: 1px solid var(--border);
        line-height: 1.7;
    }

    .bank-accordion-item.open .bank-accordion-body {
        display: block;
    }

    .bank-accordion-body ol {
        margin-left: 16px;
        margin-top: 4px;
    }

    /* SimpleFIN section */
    .simplefin-steps {
        display: flex;
        flex-direction: column;
        gap: 16px;
        margin-bottom: 20px;
    }

    .simplefin-step {
        display: flex;
        gap: 14px;
        align-items: flex-start;
    }

    .simplefin-step-number {
        width: 28px;
        height: 28px;
        border-radius: 50%;
        background: var(--accent-blue);
        color: #fff;
        font-size: 13px;
        font-weight: 700;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        margin-top: 1px;
    }

    .simplefin-step-content {
        flex: 1;
    }

    .simplefin-step-content strong {
        display: block;
        font-size: 13px;
        margin-bottom: 2px;
        color: var(--text-primary);
    }

    .simplefin-step-content span {
        font-size: 12px;
        color: var(--text-secondary);
    }

    .simplefin-token-area {
        margin-top: 16px;
    }

    .simplefin-token-area label {
        display: block;
        font-size: 12px;
        font-weight: 500;
        color: var(--text-secondary);
        margin-bottom: 6px;
        text-transform: uppercase;
        letter-spacing: 0.4px;
    }

    .simplefin-token-input {
        width: 100%;
        background: var(--bg-primary);
        border: 1px solid var(--border);
        color: var(--text-primary);
        border-radius: 6px;
        padding: 8px 10px;
        font-size: 12px;
        font-family: monospace;
        resize: vertical;
        min-height: 60px;
    }

    .simplefin-token-input:focus {
        outline: none;
        border-color: var(--accent-blue);
    }

    /* Buttons */
    .btn {
        display: inline-block;
        padding: 8px 16px;
        border-radius: 6px;
        font-size: 13px;
        font-weight: 500;
        cursor: pointer;
        border: none;
        text-decoration: none;
        transition: all 0.15s;
        text-align: center;
    }

    .btn-primary {
        background: var(--accent-blue);
        color: #fff;
    }

    .btn-primary:hover { opacity: 0.9; }

    .btn-primary:disabled {
        opacity: 0.5;
        cursor: not-allowed;
    }

    .btn-ghost {
        background: none;
        color: var(--text-secondary);
        border: 1px solid var(--border);
    }

    .btn-ghost:hover {
        background: var(--bg-hover);
        color: var(--text-primary);
    }

    .btn-success {
        background: var(--accent-green);
        color: #fff;
    }

    .btn-external {
        background: var(--bg-tertiary);
        color: var(--text-primary);
        border: 1px solid var(--border);
    }

    .btn-external:hover {
        background: var(--bg-hover);
    }

    /* Spinner */
    .spinner {
        display: inline-block;
        width: 14px;
        height: 14px;
        border: 2px solid currentColor;
        border-top-color: transparent;
        border-radius: 50%;
        animation: spin 0.7s linear infinite;
        vertical-align: middle;
        margin-right: 6px;
    }

    @keyframes spin {
        from { transform: rotate(0deg); }
        to   { transform: rotate(360deg); }
    }

    .import-status-msg {
        font-size: 13px;
        color: var(--text-secondary);
        margin-top: 10px;
    }

    .import-status-msg.success { color: var(--accent-green); }
    .import-status-msg.error   { color: var(--accent-red); }
</style>

<div class="connect-page-header">
    <h1>Connect Your Bank</h1>
    <p>Import a CSV file from your bank, or connect automatically via SimpleFIN.</p>
</div>

<div class="connect-grid">

    <!-- ============================================================
         LEFT: CSV Import
    ============================================================ -->
    <div class="connect-card" id="csvSection">
        <div class="connect-card-header">
            <h2>Import a CSV file</h2>
            <p>Download a transaction export from your bank's website and upload it here.</p>
        </div>
        <div class="connect-card-body">

            <!-- Drop zone -->
            <div class="drop-zone" id="dropZone">
                <span class="drop-zone-icon">&#128196;</span>
                <div class="drop-zone-label">Drop your CSV file here</div>
                <div class="drop-zone-sub">or click to browse</div>
                <input type="file" accept=".csv,text/csv" id="csvFileInput" />
            </div>

            <!-- Loading indicator (hidden initially) -->
            <div id="csvLoading" style="display:none; text-align:center; padding:16px 0; font-size:13px; color:var(--text-muted);">
                <span class="spinner"></span> Analysing file...
            </div>

            <!-- Preview card (hidden until file loaded) -->
            <div class="csv-preview-card" id="csvPreviewCard">
                <div class="csv-preview-header">
                    <span class="csv-preview-summary" id="csvPreviewSummary"></span>
                    <span class="csv-preview-bank" id="csvPreviewBank" style="display:none;"></span>
                </div>
                <div id="csvPreviewTableWrap" style="overflow-x:auto;"></div>
                <div class="csv-preview-actions">
                    <button class="btn btn-primary" id="csvImportBtn" onclick="confirmCsvImport()">Import transactions</button>
                    <button class="btn btn-ghost" onclick="resetCsvImport()">Cancel</button>
                </div>
            </div>

            <!-- Column mapping form (shown when bank not detected) -->
            <div class="col-mapping-form" id="colMappingForm">
                <p>We couldn't detect your bank automatically. Please map the columns below:</p>
                <div id="colMappingRows"></div>
                <div style="margin-top:12px;">
                    <button class="btn btn-primary" onclick="applyColMapping()">Preview with mapping</button>
                </div>
            </div>

            <!-- Status message -->
            <div class="import-status-msg" id="csvStatusMsg" style="display:none;"></div>

            <!-- Per-bank download instructions -->
            <div class="bank-instructions">
                <div class="bank-instructions-label">How to download from your bank</div>

                <div class="bank-accordion-item" data-bank="chase">
                    <button class="bank-accordion-trigger" onclick="toggleAccordion(this)">
                        Chase
                        <span class="bank-accordion-chevron">&#9660;</span>
                    </button>
                    <div class="bank-accordion-body">
                        <ol>
                            <li>Sign in at <strong>chase.com</strong></li>
                            <li>Go to your checking or credit card account</li>
                            <li>Click <strong>Download account activity</strong> (top right)</li>
                            <li>Choose <strong>CSV</strong> as the file type and select your date range</li>
                            <li>Click <strong>Download</strong> and upload the file above</li>
                        </ol>
                    </div>
                </div>

                <div class="bank-accordion-item" data-bank="bofa">
                    <button class="bank-accordion-trigger" onclick="toggleAccordion(this)">
                        Bank of America
                        <span class="bank-accordion-chevron">&#9660;</span>
                    </button>
                    <div class="bank-accordion-body">
                        <ol>
                            <li>Sign in at <strong>bankofamerica.com</strong></li>
                            <li>Select your account and click <strong>Download</strong></li>
                            <li>Choose <strong>Microsoft Excel format (OFX)</strong> — or <strong>CSV</strong> if available</li>
                            <li>Select date range and click <strong>Download transactions</strong></li>
                        </ol>
                    </div>
                </div>

                <div class="bank-accordion-item" data-bank="amex">
                    <button class="bank-accordion-trigger" onclick="toggleAccordion(this)">
                        American Express
                        <span class="bank-accordion-chevron">&#9660;</span>
                    </button>
                    <div class="bank-accordion-body">
                        <ol>
                            <li>Sign in at <strong>americanexpress.com</strong></li>
                            <li>Go to <strong>Statements &amp; Activity</strong></li>
                            <li>Click <strong>Download</strong> and choose <strong>CSV</strong></li>
                            <li>Pick your date range and download the file</li>
                        </ol>
                    </div>
                </div>

                <div class="bank-accordion-item" data-bank="wellsfargo">
                    <button class="bank-accordion-trigger" onclick="toggleAccordion(this)">
                        Wells Fargo
                        <span class="bank-accordion-chevron">&#9660;</span>
                    </button>
                    <div class="bank-accordion-body">
                        <ol>
                            <li>Sign in at <strong>wellsfargo.com</strong></li>
                            <li>Select your account and go to <strong>Account Activity</strong></li>
                            <li>Click <strong>Download Account Activity</strong></li>
                            <li>Choose <strong>Comma-Separated Values (CSV)</strong> and your date range</li>
                            <li>Click <strong>Download</strong></li>
                        </ol>
                    </div>
                </div>

                <div class="bank-accordion-item" data-bank="capitalone">
                    <button class="bank-accordion-trigger" onclick="toggleAccordion(this)">
                        Capital One
                        <span class="bank-accordion-chevron">&#9660;</span>
                    </button>
                    <div class="bank-accordion-body">
                        <ol>
                            <li>Sign in at <strong>capitalone.com</strong></li>
                            <li>Select your account</li>
                            <li>Click <strong>Download transactions</strong></li>
                            <li>Choose <strong>CSV</strong> and your date range</li>
                            <li>Click <strong>Download</strong></li>
                        </ol>
                    </div>
                </div>

            </div><!-- /.bank-instructions -->

        </div>
    </div>

    <!-- ============================================================
         RIGHT: SimpleFIN
    ============================================================ -->
    <div class="connect-card" id="simplefinSection">
        <div class="connect-card-header">
            <h2>Connect via SimpleFIN</h2>
            <p>Link your bank accounts automatically for ongoing sync. Works with most US banks.</p>
        </div>
        <div class="connect-card-body">

            <div class="simplefin-steps">
                <div class="simplefin-step">
                    <div class="simplefin-step-number">1</div>
                    <div class="simplefin-step-content">
                        <strong>Create a SimpleFIN token</strong>
                        <span>Visit SimpleFIN Bridge and connect your bank accounts there. You'll receive a token.</span>
                    </div>
                </div>
                <div class="simplefin-step">
                    <div class="simplefin-step-number">2</div>
                    <div class="simplefin-step-content">
                        <strong>Copy your setup token</strong>
                        <span>After connecting, SimpleFIN gives you a one-time setup token — copy it to your clipboard.</span>
                    </div>
                </div>
                <div class="simplefin-step">
                    <div class="simplefin-step-number">3</div>
                    <div class="simplefin-step-content">
                        <strong>Paste it below &amp; sync</strong>
                        <span>Paste the token here, then use the Sync button on the dashboard to pull your transactions.</span>
                    </div>
                </div>
            </div>

            <a href="https://beta-bridge.simplefin.org/" target="_blank" rel="noopener noreferrer" class="btn btn-external" style="margin-bottom:20px; display:inline-block;">
                Go to SimpleFIN &rarr;
            </a>

            <div class="simplefin-token-area" id="simplefinTokenArea">
                <label for="simplefinTokenInput">Paste your SimpleFIN setup token</label>
                <textarea
                    class="simplefin-token-input"
                    id="simplefinTokenInput"
                    placeholder="https://..."
                    rows="3"
                ></textarea>
                <div style="margin-top:10px; display:flex; gap:8px;">
                    <button class="btn btn-primary" onclick="saveSimplefinToken()" id="simplefinSaveBtn">Save Token</button>
                </div>
                <div class="import-status-msg" id="simplefinStatusMsg" style="display:none;"></div>
            </div>

        </div>
    </div>

</div><!-- /.connect-grid -->

<script>
// ============================================================
// CSV Import Logic
// ============================================================

let _csvFile = null;
let _csvPreviewData = null;

const dropZone   = document.getElementById('dropZone');
const fileInput  = document.getElementById('csvFileInput');
const loadingEl  = document.getElementById('csvLoading');
const previewCard = document.getElementById('csvPreviewCard');
const mappingForm = document.getElementById('colMappingForm');
const statusMsg   = document.getElementById('csvStatusMsg');
const importBtn   = document.getElementById('csvImportBtn');

// Drag-and-drop handlers
dropZone.addEventListener('dragover', (e) => {
    e.preventDefault();
    dropZone.classList.add('drag-over');
});

dropZone.addEventListener('dragleave', () => {
    dropZone.classList.remove('drag-over');
});

dropZone.addEventListener('drop', (e) => {
    e.preventDefault();
    dropZone.classList.remove('drag-over');
    const files = e.dataTransfer.files;
    if (files.length > 0) handleFileSelected(files[0]);
});

fileInput.addEventListener('change', () => {
    if (fileInput.files.length > 0) handleFileSelected(fileInput.files[0]);
});

function handleFileSelected(file) {
    _csvFile = file;
    showCsvLoading(true);
    hidePreview();
    hideMappingForm();
    clearStatus();
    postPreview(file);
}

function showCsvLoading(show) {
    loadingEl.style.display = show ? 'block' : 'none';
    dropZone.style.display  = show ? 'none'  : 'flex';
}

function hidePreview() {
    previewCard.classList.remove('visible');
}

function hideMappingForm() {
    mappingForm.classList.remove('visible');
}

function clearStatus() {
    statusMsg.style.display = 'none';
    statusMsg.textContent = '';
    statusMsg.className = 'import-status-msg';
}

function showStatus(msg, type) {
    statusMsg.textContent = msg;
    statusMsg.className = 'import-status-msg ' + (type || '');
    statusMsg.style.display = 'block';
}

async function postPreview(file) {
    const formData = new FormData();
    formData.append('file', file);

    try {
        const resp = await fetch('/api/import/csv/preview', {
            method: 'POST',
            body: formData,
            credentials: 'include',
        });

        const data = await resp.json();

        if (!resp.ok) {
            showCsvLoading(false);
            showStatus((data.detail || 'Preview failed.'), 'error');
            return;
        }

        _csvPreviewData = data;
        showCsvLoading(false);
        renderPreview(data);

    } catch (err) {
        showCsvLoading(false);
        showStatus('Network error — could not analyse file.', 'error');
    }
}

function renderPreview(data) {
    // Summary line
    const bankName = data.bank_display_name || (data.detected_bank ? data.detected_bank : null);
    const dateRange = data.date_range && data.date_range.from
        ? formatDateRange(data.date_range.from, data.date_range.to)
        : 'unknown date range';

    const summaryEl = document.getElementById('csvPreviewSummary');
    summaryEl.textContent = `${data.row_count} transaction${data.row_count !== 1 ? 's' : ''}` +
        (bankName ? ` from ${bankName}` : '') +
        `, ${dateRange}`;

    // Bank badge
    const bankBadge = document.getElementById('csvPreviewBank');
    if (bankName) {
        bankBadge.textContent = bankName;
        bankBadge.style.display = 'inline';
    } else {
        bankBadge.style.display = 'none';
    }

    // Preview table
    const wrap = document.getElementById('csvPreviewTableWrap');
    if (data.preview && data.preview.length > 0) {
        let html = '<table class="csv-preview-table"><thead><tr><th>Date</th><th>Amount</th><th>Description</th></tr></thead><tbody>';
        for (const row of data.preview) {
            const amtCls = row.amount >= 0 ? 'amount-pos' : 'amount-neg';
            const amtFmt = (row.amount >= 0 ? '+' : '') + '$' + Math.abs(row.amount).toFixed(2);
            html += `<tr><td>${escHtml(row.date)}</td><td class="${amtCls}">${escHtml(amtFmt)}</td><td>${escHtml(row.description)}</td></tr>`;
        }
        html += '</tbody></table>';
        wrap.innerHTML = html;
    } else {
        wrap.innerHTML = '<div style="padding:12px 16px;font-size:12px;color:var(--text-muted);">No rows to preview.</div>';
    }

    previewCard.classList.add('visible');

    // If no bank detected, show column mapping form
    if (!data.detected_bank) {
        renderMappingForm(data.headers, data.column_mapping);
    }
}

function renderMappingForm(headers, existingMapping) {
    const roles = ['date', 'amount', 'description'];
    const container = document.getElementById('colMappingRows');
    let html = '';
    for (const role of roles) {
        html += `<div class="col-mapping-row">
            <label>${role}</label>
            <select id="mapCol_${role}">
                <option value="">-- select column --</option>
                ${headers.map(h => `<option value="${escHtml(h)}" ${(existingMapping && existingMapping[role] === h) ? 'selected' : ''}>${escHtml(h)}</option>`).join('')}
            </select>
        </div>`;
    }
    container.innerHTML = html;
    mappingForm.classList.add('visible');
}

function applyColMapping() {
    if (!_csvFile || !_csvPreviewData) return;
    const dateCol = document.getElementById('mapCol_date').value;
    const amountCol = document.getElementById('mapCol_amount').value;
    const descCol = document.getElementById('mapCol_description').value;
    if (!dateCol || !amountCol || !descCol) {
        showStatus('Please select all three columns before proceeding.', 'error');
        return;
    }
    // Store mapping onto preview data so confirm can use it
    _csvPreviewData._manualMapping = { date: dateCol, amount: amountCol, description: descCol };
    hideMappingForm();
    // Re-fetch preview with explicit mapping (for simplicity, just enable the Import button)
    showStatus('Column mapping applied. Click "Import transactions" to continue.', '');
}

async function confirmCsvImport() {
    if (!_csvFile) return;

    importBtn.disabled = true;
    importBtn.innerHTML = '<span class="spinner"></span> Importing...';
    clearStatus();

    const formData = new FormData();
    formData.append('file', _csvFile);

    // Add column params — use manual mapping if available, else from preview
    const mapping = (_csvPreviewData && _csvPreviewData._manualMapping)
        ? _csvPreviewData._manualMapping
        : (_csvPreviewData && _csvPreviewData.column_mapping ? _csvPreviewData.column_mapping : {});

    const params = new URLSearchParams();
    if (mapping.date)        params.set('date_col', mapping.date);
    if (mapping.amount)      params.set('amount_col', mapping.amount);
    if (mapping.description) params.set('description_col', mapping.description);

    try {
        const resp = await fetch('/api/import/csv/confirm?' + params.toString(), {
            method: 'POST',
            body: formData,
            credentials: 'include',
        });

        const data = await resp.json();

        if (!resp.ok) {
            importBtn.disabled = false;
            importBtn.textContent = 'Import transactions';
            showStatus((data.detail || 'Import failed.'), 'error');
            return;
        }

        // Success
        importBtn.innerHTML = '&#10003; Imported!';
        importBtn.classList.add('btn-success');
        showStatus(`Imported ${data.imported} transaction${data.imported !== 1 ? 's' : ''}` +
            (data.skipped_duplicates > 0 ? `, skipped ${data.skipped_duplicates} duplicate${data.skipped_duplicates !== 1 ? 's' : ''}` : '') +
            '.', 'success');

        // Redirect to dashboard after brief delay
        setTimeout(() => { window.location.href = '/dashboard'; }, 1800);

    } catch (err) {
        importBtn.disabled = false;
        importBtn.textContent = 'Import transactions';
        showStatus('Network error — import failed.', 'error');
    }
}

function resetCsvImport() {
    _csvFile = null;
    _csvPreviewData = null;
    fileInput.value = '';
    hidePreview();
    hideMappingForm();
    clearStatus();
    dropZone.style.display = 'flex';
    importBtn.disabled = false;
    importBtn.textContent = 'Import transactions';
    importBtn.classList.remove('btn-success');
}

// ============================================================
// Bank accordion
// ============================================================

function toggleAccordion(trigger) {
    const item = trigger.closest('.bank-accordion-item');
    const isOpen = item.classList.contains('open');
    // Close all
    document.querySelectorAll('.bank-accordion-item.open').forEach(el => el.classList.remove('open'));
    // Toggle clicked
    if (!isOpen) item.classList.add('open');
}

// Auto-open accordion anchor from URL (#chase etc.)
document.addEventListener('DOMContentLoaded', () => {
    const hash = window.location.hash.replace('#', '');
    if (hash) {
        const item = document.querySelector(`.bank-accordion-item[data-bank="${hash}"]`);
        if (item) item.classList.add('open');
        // Also scroll SimpleFIN section into view if hash is simplefin
        if (hash === 'simplefin') {
            document.getElementById('simplefinSection').scrollIntoView({ behavior: 'smooth', block: 'start' });
        }
    }
});

// ============================================================
// SimpleFIN token
// ============================================================

async function saveSimplefinToken() {
    const token = document.getElementById('simplefinTokenInput').value.trim();
    const btn = document.getElementById('simplefinSaveBtn');
    const msgEl = document.getElementById('simplefinStatusMsg');

    if (!token) {
        msgEl.textContent = 'Please paste your SimpleFIN setup token.';
        msgEl.className = 'import-status-msg error';
        msgEl.style.display = 'block';
        return;
    }

    btn.disabled = true;
    btn.innerHTML = '<span class="spinner"></span> Saving...';
    msgEl.style.display = 'none';

    try {
        const resp = await fetch('/api/simplefin-token', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            credentials: 'include',
            body: JSON.stringify({ setup_token: token }),
        });

        const data = await resp.json();

        if (!resp.ok) {
            btn.disabled = false;
            btn.textContent = 'Save Token';
            msgEl.textContent = data.detail || 'Failed to save token.';
            msgEl.className = 'import-status-msg error';
            msgEl.style.display = 'block';
            return;
        }

        btn.textContent = 'Saved!';
        msgEl.textContent = 'Token saved. Use the Sync button on the dashboard to import your transactions.';
        msgEl.className = 'import-status-msg success';
        msgEl.style.display = 'block';

    } catch (err) {
        btn.disabled = false;
        btn.textContent = 'Save Token';
        msgEl.textContent = 'Network error — could not save token.';
        msgEl.className = 'import-status-msg error';
        msgEl.style.display = 'block';
    }
}

// ============================================================
// Helpers
// ============================================================

function escHtml(str) {
    if (str == null) return '';
    return String(str).replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;').replace(/"/g,'&quot;');
}

function formatDateRange(from, to) {
    const fmtDate = d => {
        const parts = d.split('-');
        const months = ['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'];
        return months[parseInt(parts[1], 10) - 1] + ' ' + parseInt(parts[2], 10) + ', ' + parts[0];
    };
    if (from === to) return fmtDate(from);
    return fmtDate(from) + ' \u2013 ' + fmtDate(to);
}
</script>
{% endblock %}