<?php
function required_env($name) {
    $value = getenv($name);
    if (!$value) throw new RuntimeException("Set {$name} before running this example.");
    return $value;
}
function request_json($method, $url, $payload = null, $token = null, $correlationId = null) {
    $ch = curl_init($url);
    $headers = ['Accept: application/json'];
    if ($payload !== null) { $headers[] = 'Content-Type: application/json'; curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($payload)); }
    if ($token) $headers[] = 'Authorization: Bearer ' . $token;
    if ($correlationId) $headers[] = 'X-Correlation-Id: ' . $correlationId;
    curl_setopt_array($ch, [CURLOPT_CUSTOMREQUEST => $method, CURLOPT_HTTPHEADER => $headers, CURLOPT_RETURNTRANSFER => true, CURLOPT_TIMEOUT => 45]);
    $body = curl_exec($ch);
    $status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    if ($body === false || $status < 200 || $status >= 300) throw new RuntimeException('HTTP ' . $status . ': ' . curl_error($ch) . ' ' . $body);
    curl_close($ch);
    return $body;
}
$identityUrl = getenv('DECISIOQ_IDENTITY_URL') ?: 'https://identity.vinquery.com/connect/token';
$catalogUrl = rtrim(getenv('DECISIOQ_DKS_URL') ?: 'https://dks.vinquery.com', '/');
$decisionServiceUrl = rtrim(getenv('DECISIOQ_DDE_URL') ?: 'https://dde.vinquery.com', '/');
$correlationId = 'auto-fleet-001-php-' . date('YmdHis');
$tokenJson = request_json('POST', $identityUrl, ['clientId' => required_env('DECISIOQ_CLIENT_ID'), 'clientSecret' => required_env('DECISIOQ_CLIENT_SECRET'), 'audience' => getenv('DECISIOQ_AUDIENCE') ?: 'vinquery:api:decisioq']);
$token = json_decode($tokenJson, true)['jwtToken'];
request_json('GET', $catalogUrl . '/decisioncatalog/decisions/AUTO-FLEET-001', null, $token, $correlationId);
$request = [
    'decisionId' => 'AUTO-FLEET-001',
    'profileId' => 'balanced',
    'scenarioId' => null,
    'algorithm' => 'TOPSIS',
    'weightStrategy' => 'Expert',
    'runSensitivity' => false,
    'requestContext' => ['correlationId' => $correlationId],
    'options' => [
        ['optionId' => 'VEHICLE-001', 'name' => 'Vehicle 001', 'values' => ['lifecycle_cost' => 18000, 'downtime_risk' => 9, 'maintenance_trend' => 6, 'utilization_criticality' => 92, 'safety_rating' => 4.5]],
        ['optionId' => 'VEHICLE-002', 'name' => 'Vehicle 002', 'values' => ['lifecycle_cost' => 14500, 'downtime_risk' => 3, 'maintenance_trend' => 2, 'utilization_criticality' => 76, 'safety_rating' => 4]]
    ]
];
echo request_json('POST', $decisionServiceUrl . '/api/v1/decide', $request, $token, $correlationId);