<?php

namespace App\Service\common\ai;

use App\BaseApp\BaseService;

/**
 * AI Agent 工厂：按系统配置（nl_system_config + 平台表）选择供应商
 * 未配置时回落 env（config/ai.php）；目前支持讯飞星火 / DeepSeek
 */
class AiAgentFactory extends BaseService
{
    public const PROVIDER_SPARK = 'spark';
    public const PROVIDER_DEEPSEEK = 'deepseek';

    public function __construct()
    {
        // 工厂解析不强制登录（内部调用）
        $this->isAuth = false;
        parent::__construct();
    }

    /**
     * 获取 Agent 实例
     *
     * @param string|null $provider 为空则用系统配置 ai_active_provider / env 默认
     */
    public function make(?string $provider = null): AiAgentInterface
    {
        $resolved = AiRuntimeConfigService::getInstance()->resolve($provider);
        $name = strtolower(trim((string) ($resolved['provider'] ?? self::PROVIDER_DEEPSEEK)));
        if ($name === self::PROVIDER_DEEPSEEK) {
            return DeepSeekAiAgent::getInstance();
        }
        if ($name === self::PROVIDER_SPARK) {
            return SparkAiAgent::getInstance();
        }
        $this->utils->errorThrow('不支持的 AI 供应商：' . $name);
        return SparkAiAgent::getInstance();
    }
}