<?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_available_stores(): array
{
    return [
        // Hoja original que ya venía funcionando.
        'flower' => [
            'label' => 'Flower',
            'spreadsheet_id' => '1SSmQuR9quxeQbMKNMDkRe8-n1gU7WuEfsFaJ3WKFO-c',
            'sheet_gid' => null,
            'startRow' => 5552,
        ],
        // Segunda tienda (nuevo link que pasaste).
        'otra_tienda' => [
            'label' => 'TUANI',
            'spreadsheet_id' => '1QYKeBJIIqYm6yW6Ka-5gKdxhUHwXOAc0No7RjnimxTw',
            'sheet_gid' => 1523126328,
            'startRow' => 5552,
        ],
    ];
}

function drive_test_get_store_config(string $storeKey): array
{
    $storeKey = trim(mb_strtolower($storeKey));
    $stores = drive_test_available_stores();

    if (!isset($stores[$storeKey])) {
        return $stores['flower'];
    }

    return $stores[$storeKey] + ['key' => $storeKey];
}

function drive_test_resolve_sheet_a1_range($service, string $spreadsheetId, ?int $sheetGid, string $rangeA1): string
{
    if ($sheetGid === null) {
        return $rangeA1;
    }

    static $cache = [];
    $cacheKey = $spreadsheetId . '|' . (string) $sheetGid . '|' . $rangeA1;
    if (isset($cache[$cacheKey])) {
        return $cache[$cacheKey];
    }

    try {
        $meta = $service->spreadsheets->get($spreadsheetId, ['fields' => 'sheets(properties(sheetId,title))']);
        foreach (($meta->getSheets() ?? []) as $sheet) {
            $props = $sheet->getProperties();
            if (!$props) {
                continue;
            }

            if ((int) $props->getSheetId() === (int) $sheetGid) {
                $title = trim((string) ($props->getTitle() ?? ''));
                if ($title !== '') {
                    // Sheet names with spaces/special chars must be quoted.
                    $escaped = str_replace("'", "''", $title);
                    $cache[$cacheKey] = "'{$escaped}'!{$rangeA1}";
                    return $cache[$cacheKey];
                }
            }
        }
    } catch (Throwable $exception) {
        // Fallback to default range.
    }

    $cache[$cacheKey] = $rangeA1;
    return $rangeA1;
}

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, int $startRow = 5552, string $storeKey = 'flower'): array
{
    $storeConfig = drive_test_get_store_config($storeKey);

    $credentialsPath = __DIR__ . '/../google_credentials.json';
    $spreadsheetId = (string) ($storeConfig['spreadsheet_id'] ?? '');
    $sheetGid = array_key_exists('sheet_gid', $storeConfig) ? ($storeConfig['sheet_gid'] === null ? null : (int) $storeConfig['sheet_gid']) : null;
    $rangeA1 = 'A:Z';

    if ($spreadsheetId === '') {
        throw new RuntimeException('Configuración de Drive para la tienda no válida.');
    }

    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);

    $range = drive_test_resolve_sheet_a1_range($service, $spreadsheetId, $sheetGid, $rangeA1);

    $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);

    $startIndex = max(0, $startRow - 2);
    if ($startIndex > 0 && $startIndex < count($dataRows)) {
        $dataRows = array_slice($dataRows, $startIndex);
    }

    $previewRows = $limit > 0
        ? array_reverse(array_slice($dataRows, -$limit))
        : array_reverse($dataRows);

    $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']);

        // Importante: para 'flower' mantenemos EXACTAMENTE el algoritmo anterior
        // para no romper el historial/tracking ya existente.
        $sourceKeyBase = implode('|', [$codigo, $importId, $nombre, $celular, $producto]);
        if (($storeConfig['key'] ?? 'flower') === 'flower') {
            $sourceKey = sha1($sourceKeyBase);
        } else {
            $sourceKey = sha1(($storeConfig['key'] ?? $storeKey) . '|' . $sourceKeyBase);
        }

        $orders[] = [
            'source_key' => $sourceKey,
            'codigo' => $codigo,
            'import_id' => $importId,
            'nombre' => $nombre,
            'direccion' => $direccion,
            'referencia' => $referencia,
            'agencia' => '',
            'sede_agencia' => '',
            '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 = $pdo->prepare("SELECT source_key, estado, nota_seguimiento, user_id, direccion, referencia, agencia, sede_agencia, sede, ciudad, distrito, dni, observaciones, producto, cantidad, precio, confirmacion_producto, confirmacion_cantidad, confirmacion_precio, confirmacion_producto_extra, confirmacion_cantidad_extra, confirmacion_precio_extra, proxima_llamada_at, fecha_entrega_programada, numero_cuenta_enviado_at, ultima_gestion_at, updated_at FROM callcenter_test_tracking WHERE source_key IN ($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', 'agencia', 'sede_agencia', 'sede', 'ciudad', 'distrito', 'dni', 'observaciones', 'producto', 'cantidad', 'precio', 'confirmacion_producto', 'confirmacion_cantidad', 'confirmacion_precio', 'confirmacion_producto_extra', 'confirmacion_cantidad_extra', 'confirmacion_precio_extra'];

    foreach ($orders as &$order) {
        $current = $tracking[$order['source_key']] ?? null;
        $order['estado'] = $current['estado'] ?? 'POR LLAMAR';
        $order['nota_seguimiento'] = $current['nota_seguimiento'] ?? '';
        $userId = array_key_exists('user_id', (array) $current) ? $current['user_id'] : null;
        $order['user_id'] = $userId !== null ? ((int) $userId > 0 ? (int) $userId : null) : null;
        $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;
}