<?php

namespace App\Services\Agent;

use Illuminate\Support\Facades\Http;

class HttpAgentProvider implements AgentProviderInterface
{
    protected string $endpoint;

    public function __construct(?string $endpoint = null)
    {
        $this->endpoint = $endpoint ?? config('services.agent_provider.endpoint', '');
    }

    /**
     * @param array<string, mixed> $context
     * @param array<string, mixed> $options
     */
    public function generate(array $context, array $options = []): string
    {
        if (empty($this->endpoint)) {
            // placeholder to avoid accidental outbound calls when未配置
            return (new DummyAgentProvider())->generate($context, $options);
        }

        $payload = [
            'context' => $context,
            'options' => $options,
        ];

        $response = Http::post($this->endpoint, $payload);

        if (! $response->successful()) {
            throw new \RuntimeException('Agent provider failed: '.$response->body());
        }

        $data = $response->json();

        return is_string($data) ? $data : ($data['content'] ?? '');
    }
}