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

    try {
        $mgr = new PaymentBillingManager($pdo2, $company_id);
        $action = $data['action'] ?? ($_POST['action'] ?? '');

        if ($action === 'billable_documents') {
            $contact_id = (int)($data['contact_id'] ?? 0);
            $answer['output'] = $mgr->getBillableDocuments($contact_id);
            $answer['success'] = 1;
            exit(json_encode($answer));
        }

        if ($action === 'open_billings') {
            $contact_id = (int)($data['contact_id'] ?? 0);
            $answer['output'] = $mgr->getOpenBillingList($contact_id);
            $answer['success'] = 1;
            exit(json_encode($answer));
        }

        if ($action === 'retrieve') {
            $billing_id = (int)($data['id'] ?? $data['billing_id'] ?? 0);
            $answer['output'] = $mgr->getBillingById($billing_id);
            $answer['success'] = 1;
            exit(json_encode($answer));
        }

        if ($action === 'void') {
            $billing_id = (int)($data['id'] ?? $data['billing_id'] ?? 0);
            dbTransaction($pdo2, function($pdo) use ($billing_id, $company_id, $logging) {
                $mgr = new PaymentBillingManager($pdo, $company_id);
                $mgr->voidBilling($billing_id, $logging);
            });
            $answer['success'] = 1;
            $answer['message'] = 'Payment billing voided.';
            exit(json_encode($answer));
        }

        if ($action === 'create') {
            $new_id = null;
            dbTransaction($pdo2, function($pdo) use ($data, $company_id, $logging, &$new_id) {
                $mgr = new PaymentBillingManager($pdo, $company_id);
                $new_id = $mgr->createBilling($data, $logging);
            });
            $answer['success'] = 1;
            $answer['new_id'] = $new_id;
            $answer['message'] = 'Payment billing created.';
            (new UsageGuard($pdo1, $company_id, $packages))->increment();
            exit(json_encode($answer));
        }

        $answer['output'] = $mgr->getBillingList();
        $answer['success'] = 1;

    } catch (PDOException $e) {
        $answer['message'] = 'Database error, please try again.';
        http_response_code(500);

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

    exit(json_encode($answer));
?>