<?php
declare(strict_types=1);

require_once __DIR__ . '/../../modules/shared/db.php';
require_once __DIR__ . '/../../modules/shared/auth/service.php';
require_once __DIR__ . '/../../modules/market_management/service.php';

header('Content-Type: application/json; charset=utf-8');
header('Cache-Control: no-store');

$env = expand_env_values(parse_env_file(__DIR__ . '/../../.env'));
$pdo = connect_database($env);
auth_bootstrap_session();

if (auth_current_user($pdo) === null) {
    http_response_code(401);
    echo json_encode(['ok' => false, 'error' => 'Unauthorized']);
    exit;
}

$requestMethod = strtoupper((string) ($_SERVER['REQUEST_METHOD'] ?? 'GET'));
if ($requestMethod === 'POST') {
    $csrf = (string) ($_SERVER['HTTP_X_CSRF_TOKEN'] ?? '');
    if (!auth_validate_csrf_token($csrf)) {
        http_response_code(419);
        echo json_encode(['ok' => false, 'error' => 'Ungültiges Sicherheits-Token']);
        exit;
    }
    $payload = json_decode((string) file_get_contents('php://input'), true);
    if (!is_array($payload)) {
        http_response_code(400);
        echo json_encode(['ok' => false, 'error' => 'Ungültige Anfrage']);
        exit;
    }
    $scope = (string) ($payload['scope'] ?? '');
    $id = market_management_require_positive_id($payload['id'] ?? null, 'id');
    $fields = is_array($payload['fields'] ?? null) ? $payload['fields'] : [];
    if ($scope === 'occurrence') {
        market_management_update_occurrence($pdo, $id, $fields);
    } elseif ($scope === 'day') {
        market_management_update_day($pdo, $id, $fields);
    } else {
        throw new InvalidArgumentException('Ungültiger Bearbeitungsbereich.');
    }
    echo json_encode(['ok' => true]);
    exit;
}

$occurrenceId = filter_input(INPUT_GET, 'id', FILTER_VALIDATE_INT);
if (!is_int($occurrenceId) || $occurrenceId <= 0) {
    http_response_code(400);
    echo json_encode(['ok' => false, 'error' => 'Invalid occurrence id']);
    exit;
}

$occurrence = market_management_get_occurrence($pdo, $occurrenceId);
if ($occurrence === null) {
    http_response_code(404);
    echo json_encode(['ok' => false, 'error' => 'Occurrence not found']);
    exit;
}

$market = market_management_get_market($pdo, (int) $occurrence['market_definition_id']);
if ($market === null) {
    http_response_code(404);
    echo json_encode(['ok' => false, 'error' => 'Market not found']);
    exit;
}

echo json_encode(['ok' => true, 'market' => $market, 'occurrence' => $occurrence], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);