<?php
require_once __DIR__ . '/../../../session.php';
require_once '../../../assets/utils/db_auth.php';
require_role($user_role, ['owner', 'admin']);
require_once '../../../assets/utils/classes/EtlStockManager.php';

$etl    = new EtlStockManager($pdo2, $pdo1, $company_id);
$action = $data['action'] ?? '';

try {
    if ($action === 'read') {
        $answer['output']  = $etl->getStatus();
        $answer['success'] = 1;
        exit(json_encode($answer));
    }

    if ($action === 'get_current_gaps') {
        $gaps = $etl->getGaps();
        $answer['output']  = ['current_gaps' => count($gaps)];
        $answer['success'] = 1;
        exit(json_encode($answer));
    }

    if ($action === 'get_warehouses') {
        $sth = $pdo2->prepare(
            "SELECT id, warehouse_name FROM md_warehouse
             WHERE company_id = :cid AND status = 1
             ORDER BY warehouse_name"
        );
        $sth->execute([':cid' => $company_id]);
        $answer['output']  = $sth->fetchAll(PDO::FETCH_ASSOC);
        $answer['success'] = 1;
        exit(json_encode($answer));
    }

    if ($action === 'get_periods') {
        $warehouse_id = (int)($data['warehouse_id'] ?? 0);
        if (!$warehouse_id) {
            http_response_code(400);
            $answer['message'] = 'warehouse_id is required.';
            exit(json_encode($answer));
        }
        $answer['output']  = $etl->getDistinctPeriods($warehouse_id);
        $answer['success'] = 1;
        exit(json_encode($answer));
    }

    if ($action === 'rebuild_period') {
        $warehouse_id = (int)($data['warehouse_id'] ?? 0);
        $period       = $data['period'] ?? '';
        if (!$warehouse_id || !preg_match('/^\d{4}-\d{2}$/', $period)) {
            http_response_code(400);
            $answer['message'] = 'Valid warehouse_id and period (YYYY-MM) are required.';
            exit(json_encode($answer));
        }
        $etl->rebuildPeriod($warehouse_id, $period);
        $answer['success'] = 1;
        exit(json_encode($answer));
    }

    $answer['message'] = 'Invalid action.';
} catch (Exception $e) {
    $answer['message'] = $e->getMessage();
    http_response_code(400);
}

exit(json_encode($answer));