<?php
require_once '../../core/config.php';
require_once '../../core/session.php';
require_once '../../core/database.php';
require_once '../../core/auth.php';
require_once '../../core/permissions.php';
require_once '../../services/billing/BillingPayablesService.php';

require_login();
header('Content-Type: application/json; charset=utf-8');

if (!user_can('billing.inbox') && !user_can('billing.payables') && !user_can('module.billing') && current_user_role() !== 'admin') {
    http_response_code(403);
    echo json_encode(array('success' => false, 'message' => 'No tienes permisos para ver este documento.'));
    exit;
}

try {
    $id = $_GET['id'] ?? '';
    $env = $_GET['env'] ?? 'sandbox';
    $service = new BillingPayablesService(db());
    echo json_encode(array(
        'success' => true,
        'document' => $service->getDocument($id, $env),
        'payments' => $service->getPaymentHistory($id, $env),
        'options' => $service->getOptions($env)
    ), JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
} catch (Throwable $e) {
    http_response_code(400);
    echo json_encode(array('success' => false, 'message' => $e->getMessage()), JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
}
