<?php
require_once __DIR__ . '/../vendor/autoload.php';
require_once __DIR__ . '/callcenter_test_helpers.php';

function drive_test_normalize_header(string $header): string
{
    $header = trim($header);
    $header = preg_replace('/\s+/', ' ', $header ?? '');
    $header = strtoupper((string) $header);
    return $header;
}

function drive_test_get_cell(array $row, array $indexes, array $aliases, string $default = ''): string
{
    foreach ($aliases as $alias) {
        $normalized = drive_test_normalize_header($alias);
        if (array_key_exists($normalized, $indexes)) {
            return trim((string) ($row[$indexes[$normalized]] ?? $default));
        }
    }

    return $default;
}

function drive_test_fetch_orders(int $limit = 10): array
{
    $credentialsPath = __DIR__ . '/../google_credentials.json';
    $spreadsheetId = '1SSmQuR9quxeQbMKNMDkRe8-n1gU7WuEfsFaJ3WKFO-c';
    $range = 'A:Z';

    if (!file_exists($credentialsPath)) {
        throw new RuntimeException('No se encontró el archivo de credenciales de Google.');
    }

    $client = new Google\Client();
    $client->setAuthConfig($credentialsPath);
    $client->addScope(Google\Service\Sheets::SPREADSHEETS_READONLY);

    $service = new Google\Service\Sheets($client);
    $response = $service->spreadsheets_values->get($spreadsheetId, $range);
    $values = $response->getValues();

    if (empty($values)) {
        return [
            'headers' => [],
            'orders' => [],
            'total_rows' => 0,
        ];
    }

    $headers = $values[0] ?? [];
    $headerIndexes = [];
    foreach ($headers as $index => $header) {
        $normalized = drive_test_normalize_header((string) $header);
        if ($normalized === '') {
            $normalized = $index === 0 ? 'CODIGO' : 'COL_' . $index;
        }
        $headerIndexes[$normalized] = $index;
    }

    $dataRows = array_slice($values, 1);
    $previewRows = array_reverse(array_slice($dataRows, -$limit));
    $orders = [];

    foreach ($previewRows as $row) {
        $codigo = trim((string) ($row[0] ?? ''));
        $importId = drive_test_get_cell($row, $headerIndexes, ['ID']);
        $nombre = drive_test_get_cell($row, $headerIndexes, ['NOMBRE']);
        $celular = preg_replace('/\D+/', '', drive_test_get_cell($row, $headerIndexes, ['CELULAR']));
        $producto = drive_test_get_cell($row, $headerIndexes, ['PRODUCTO']);
        $cantidad = drive_test_get_cell($row, $headerIndexes, ['CANTIDAD']);
        $precio = drive_test_get_cell($row, $headerIndexes, ['PRECIO']);
        $pais = drive_test_get_cell($row, $headerIndexes, ['PAIS']);
        $coordenadas = drive_test_get_cell($row, $headerIndexes, ['COORDENADAS']);
        $ciudad = drive_test_get_cell($row, $headerIndexes, ['CIUDAD']);
        $metodo = drive_test_get_cell($row, $headerIndexes, ['METODO']);
        $sede = drive_test_get_cell($row, $headerIndexes, ['SEDE / ID', 'SEDE/ID']);
        $dni = drive_test_get_cell($row, $headerIndexes, ['N° DNI', 'N° DNI ', 'NRO DNI', 'DNI']);
        $observaciones = drive_test_get_cell($row, $headerIndexes, ['OBSERVACIONES', 'OBSERVACIONES ']);
        $direccion = drive_test_get_cell($row, $headerIndexes, ['DIRECION', 'DIRECCION']);
        $referencia = drive_test_get_cell($row, $headerIndexes, ['REFERENCIA']);
        $distrito = drive_test_get_cell($row, $headerIndexes, ['DISTRITO']);
        $sourceKey = sha1(implode('|', [$codigo, $importId, $nombre, $celular, $producto]));

        $orders[] = [
            'source_key' => $sourceKey,
            'codigo' => $codigo,
            'import_id' => $importId,
            'nombre' => $nombre,
            'direccion' => $direccion,
            'referencia' => $referencia,
            'distrito' => $distrito,
            'celular' => $celular,
            'producto' => $producto,
            'cantidad' => $cantidad,
            'precio' => $precio,
            'pais' => $pais,
            'coordenadas' => $coordenadas,
            'ciudad' => $ciudad,
            'metodo' => $metodo,
            'sede' => $sede,
            'dni' => $dni,
            'observaciones' => $observaciones,
        ];
    }

    return [
        'headers' => $headers,
        'orders' => $orders,
        'total_rows' => count($dataRows),
    ];
}

function drive_test_fetch_tracking(PDO $pdo, array $sourceKeys): array
{
    if (empty($sourceKeys)) {
        return [];
    }

    cc_test_ensure_tracking_table($pdo);

    $placeholders = implode(',', array_fill(0, count($sourceKeys), '?'));
    $stmt = $pdo->prepare("SELECT source_key, estado, nota_seguimiento, direccion, referencia, sede, ciudad, distrito, dni, observaciones, producto, cantidad, precio, proxima_llamada_at, fecha_entrega_programada, numero_cuenta_enviado_at, ultima_gestion_at, updated_at FROM callcenter_test_tracking WHERE source_key IN ($placeholders)");
    $stmt->execute($sourceKeys);

    $tracking = [];
    foreach ($stmt->fetchAll(PDO::FETCH_ASSOC) as $row) {
        $tracking[$row['source_key']] = $row;
    }

    return $tracking;
}

function drive_test_merge_tracking(array $orders, array $tracking): array
{
    $editableFields = ['direccion', 'referencia', 'sede', 'ciudad', 'distrito', 'dni', 'observaciones', 'producto', 'cantidad', 'precio'];

    foreach ($orders as &$order) {
        $current = $tracking[$order['source_key']] ?? null;
        $order['estado'] = $current['estado'] ?? 'POR LLAMAR';
        $order['nota_seguimiento'] = $current['nota_seguimiento'] ?? '';
        $order['seguimiento_actualizado'] = $current['updated_at'] ?? null;
        $order['proxima_llamada_at'] = $current['proxima_llamada_at'] ?? null;
        $order['fecha_entrega_programada'] = $current['fecha_entrega_programada'] ?? null;
        $order['numero_cuenta_enviado_at'] = $current['numero_cuenta_enviado_at'] ?? null;
        $order['ultima_gestion_at'] = $current['ultima_gestion_at'] ?? ($current['updated_at'] ?? null);

        foreach ($editableFields as $field) {
            $order[$field . '_drive'] = $order[$field] ?? '';
            $trackedValue = $current[$field] ?? null;
            $order[$field . '_editado'] = $trackedValue;
            if ($trackedValue !== null && trim((string) $trackedValue) !== '') {
                $order[$field] = $trackedValue;
            }
        }

        $digits = preg_replace('/\D+/', '', $order['celular'] ?? '');
        $order['whatsapp_url'] = $digits !== '' ? 'https://wa.me/' . $digits : '';
        $order['telefono_url'] = $digits !== '' ? 'tel:' . $digits : '';
    }
    unset($order);

    return $orders;
}