/**
 * settings-view.js — Logo upload, QBO import, QBO connection test
 * Extracted from app.js
 */

let currentLogoFile = null;

export async function checkCurrentLogo() {
    try {
        const response = await fetch('/api/logo-info');
        if (response.ok) {
            const data = await response.json();
            if (data.hasLogo) {
                document.getElementById('logo-preview').classList.remove('hidden');
                document.getElementById('logo-image').src = data.logoPath + '?t=' + Date.now();
            }
        }
    } catch (error) {
        console.error('Error checking logo:', error);
    }
}

export async function uploadLogo() {
    if (!currentLogoFile) {
        alert('Please select a file first');
        return;
    }

    const formData = new FormData();
    formData.append('logo', currentLogoFile);

    const statusDiv = document.getElementById('upload-status');
    statusDiv.innerHTML = '<p class="text-blue-600">Uploading...</p>';

    try {
        const response = await fetch('/api/upload-logo', {
            method: 'POST',
            body: formData
        });

        if (response.ok) {
            const data = await response.json();
            statusDiv.innerHTML = '<p class="text-green-600">✓ Logo uploaded successfully!</p>';
            document.getElementById('logo-preview').classList.remove('hidden');
            document.getElementById('logo-image').src = data.path + '?t=' + Date.now();
            document.getElementById('upload-btn').disabled = true;
            currentLogoFile = null;
            document.getElementById('logo-filename').textContent = '';
            document.getElementById('logo-upload').value = '';
        } else {
            const error = await response.json();
            statusDiv.innerHTML = `<p class="text-red-600">✗ Error: ${error.error}</p>`;
        }
    } catch (error) {
        console.error('Upload error:', error);
        statusDiv.innerHTML = '<p class="text-red-600">✗ Upload failed</p>';
    }
}

export function initSettingsView() {
    const logoUpload = document.getElementById('logo-upload');
    if (logoUpload) {
        logoUpload.addEventListener('change', (e) => {
            const file = e.target.files[0];
            if (file) {
                currentLogoFile = file;
                document.getElementById('logo-filename').textContent = file.name;
                document.getElementById('upload-btn').disabled = false;
            }
        });
    }
}

export async function checkQboOverdue() {
    const btn = document.querySelector('button[onclick="checkQboOverdue()"]');
    const resultDiv = document.getElementById('qbo-result');
    const tbody = document.getElementById('qbo-result-list');

    const originalText = btn.innerHTML;
    btn.innerHTML = '⏳ Connecting to QBO...';
    btn.disabled = true;
    resultDiv.classList.add('hidden');
    tbody.innerHTML = '';

    try {
        const response = await fetch('/api/qbo/overdue');
        const invoices = await response.json();

        if (response.ok) {
            resultDiv.classList.remove('hidden');

            if (invoices.length === 0) {
                tbody.innerHTML = '<tr><td colspan="4" class="px-4 py-4 text-center text-gray-500">✅ Good news! No overdue invoices found older than 30 days.</td></tr>';
            } else {
                tbody.innerHTML = invoices.map(inv => `
                    <tr>
                        <td class="px-4 py-2 font-medium text-gray-900">${inv.DocNumber || '(No Num)'}</td>
                        <td class="px-4 py-2 text-gray-600">${inv.CustomerRef?.name || 'Unknown'}</td>
                        <td class="px-4 py-2 text-red-600 font-medium">${inv.DueDate}</td>
                        <td class="px-4 py-2 text-right font-bold text-gray-800">$${inv.Balance}</td>
                    </tr>
                `).join('');
            }
            alert(`Success! Connection working. Found ${invoices.length} overdue invoices.`);
        } else {
            throw new Error(invoices.error || 'Unknown error');
        }
    } catch (error) {
        console.error('QBO Test Error:', error);
        alert('❌ Connection Test Failed: ' + error.message);
        tbody.innerHTML = `<tr><td colspan="4" class="px-4 py-4 text-center text-red-600">Error: ${error.message}</td></tr>`;
        resultDiv.classList.remove('hidden');
    } finally {
        btn.innerHTML = originalText;
        btn.disabled = false;
    }
}

export async function importFromQBO() {
    if (!confirm(
        'Alle unbezahlten Rechnungen aus QBO importieren?\n\n' +
        '• Bereits importierte werden übersprungen\n' +
        '• Nur Kunden die lokal verknüpft sind\n\n' +
        'Fortfahren?'
    )) return;

    const btn = document.querySelector('button[onclick="importFromQBO()"]');
    const resultDiv = document.getElementById('qbo-import-result');

    const originalText = btn.innerHTML;
    btn.innerHTML = '⏳ Importiere aus QBO...';
    btn.disabled = true;
    resultDiv.classList.add('hidden');

    try {
        const response = await fetch('/api/qbo/import-unpaid', { method: 'POST' });
        const result = await response.json();

        resultDiv.classList.remove('hidden');

        if (response.ok) {
            let html = `<div class="p-4 rounded-lg ${result.imported > 0 ? 'bg-green-50 border border-green-200' : 'bg-blue-50 border border-blue-200'}">`;
            html += `<p class="font-semibold text-gray-800 mb-2">Import abgeschlossen</p>`;
            html += `<ul class="text-sm text-gray-700 space-y-1">`;
            html += `<li>✅ <strong>${result.imported}</strong> Rechnungen importiert</li>`;

            if (result.skipped > 0) {
                html += `<li>⏭️ <strong>${result.skipped}</strong> bereits vorhanden (übersprungen)</li>`;
            }
            if (result.skippedNoCustomer > 0) {
                html += `<li>⚠️ <strong>${result.skippedNoCustomer}</strong> übersprungen — Kunde nicht verknüpft:</li>`;
                html += `<li class="ml-4 text-xs text-gray-500">${result.skippedCustomerNames.join(', ')}</li>`;
            }

            html += `</ul></div>`;
            resultDiv.innerHTML = html;

            if (result.imported > 0 && window.invoiceView) {
                window.invoiceView.loadInvoices();
            }
        } else {
            resultDiv.innerHTML = `<div class="p-4 bg-red-50 border border-red-200 rounded-lg">
                <p class="font-semibold text-red-800">Import fehlgeschlagen</p>
                <p class="text-sm text-red-600 mt-1">${result.error}</p>
            </div>`;
        }
    } catch (error) {
        console.error('Import Error:', error);
        resultDiv.classList.remove('hidden');
        resultDiv.innerHTML = `<div class="p-4 bg-red-50 border border-red-200 rounded-lg">
            <p class="text-red-600">Netzwerkfehler beim Import.</p>
        </div>`;
    } finally {
        btn.innerHTML = originalText;
        btn.disabled = false;
    }
}

// Expose for onclick handlers
window.uploadLogo = uploadLogo;
window.checkQboOverdue = checkQboOverdue;
window.importFromQBO = importFromQBO;