<?php
namespace Modules\AI\Drivers;
use Illuminate\Http\Client\PendingRequest;
use Illuminate\Support\Facades\Http;
use Modules\AI\Contracts\AIProviderDriver;
use Modules\AI\Models\AIProvider;
final class OpenAICompatibleDriver implements AIProviderDriver
{
    private function client(AIProvider $provider): PendingRequest
    {
        $client=Http::acceptJson()->timeout((int)config('ai.timeout',60));
        return filled($provider->api_key) ? $client->withToken($provider->api_key) : $client;
    }
    public function generate(AIProvider $provider,array $messages,array $options=[]): array
    {
        $base=rtrim((string)($provider->base_url ?: 'https://api.openai.com/v1'),'/');
        $payload=['model'=>$options['model']??$provider->default_model,'messages'=>$messages,'temperature'=>$options['temperature']??config('ai.temperature',0.3),'max_tokens'=>$options['max_tokens']??config('ai.max_output_tokens',2048)];
        $response=$this->client($provider)->post($base.'/chat/completions',array_filter($payload,fn($v)=>$v!==null));
        $response->throw(); $json=$response->json();
        return ['text'=>(string)data_get($json,'choices.0.message.content',''),'usage'=>(array)data_get($json,'usage',[]),'raw'=>$json];
    }
    public function test(AIProvider $provider): array
    {
        $result=$this->generate($provider,[['role'=>'user','content'=>'Reply with OK only.']],['max_tokens'=>8,'temperature'=>0]);
        return ['ok'=>true,'message'=>trim($result['text']) ?: 'Provider responded successfully.'];
    }
}