<?php
header('Content-Type: application/json');
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: POST, GET, OPTIONS');
header('Access-Control-Allow-Headers: Content-Type');
if ($_SERVER['REQUEST_METHOD'] === 'OPTIONS') { http_response_code(200); exit; }

require_once('/opt/wevads/hamid-providers-config.php');

$input = json_decode(file_get_contents('php://input'), true) ?: $_REQUEST;
$action = $input['action'] ?? $_GET['action'] ?? 'status';

switch ($action) {
    case 'chat':
        $message = $input['message'] ?? '';
        if (empty($message)) { echo json_encode(['error'=>'No message']); exit; }
        echo json_encode(callWithFailover($message, $input['provider'] ?? null));
        break;
    case 'brain':
        echo json_encode(['status'=>'success','winners'=>getBrainWinners($input['isp'] ?? null),'configs'=>getBrainConfigs()]);
        break;
    case 'providers':
        $providers = getProviders();
        echo json_encode(['status'=>'success','count'=>count($providers),'providers'=>array_map(fn($p)=>['name'=>$p['provider_name'],'model'=>$p['model'],'has_key'=>!empty($p['api_key'])],$providers)]);
        break;
    default:
        echo json_encode(['status'=>'success','engine'=>'hamid','actions'=>['chat','brain','providers']]);
}