//! Discovery 服务核心实现

use crate::{DiscoveryConfig, DiscoveryError};
use protocols::adp::{DiscoveryRequest, DiscoveryResponse, DiscoveryResult};
use async_trait::async_trait;

/// Discovery 服务 trait
#[async_trait]
pub trait DiscoveryService: Send + Sync {
    /// 执行发现查询
    async fn discover(&self, request: DiscoveryRequest) -> Result<DiscoveryResponse, DiscoveryError>;
    
    /// 注册智能体 ACS
    async fn register_agent(&self, acs: serde_json::Value) -> Result<(), DiscoveryError>;
    
    /// 注销智能体
    async fn unregister_agent(&self, aic: &str) -> Result<(), DiscoveryError>;
    
    /// 更新智能体 ACS
    async fn update_agent(&self, aic: &str, acs: serde_json::Value) -> Result<(), DiscoveryError>;
}

/// Discovery 服务实现
pub struct DiscoveryServiceImpl {
    config: DiscoveryConfig,
    storage: Box<dyn crate::Storage>,
    matcher: Box<dyn crate::Matcher>,
    forwarder: Option<Box<dyn crate::Forwarder>>,
}

impl DiscoveryServiceImpl {
    pub fn new(
        config: DiscoveryConfig,
        storage: Box<dyn crate::Storage>,
        matcher: Box<dyn crate::Matcher>,
        forwarder: Option<Box<dyn crate::Forwarder>>,
    ) -> Self {
        Self {
            config,
            storage,
            matcher,
            forwarder,
        }
    }
}

#[async_trait]
impl DiscoveryService for DiscoveryServiceImpl {
    async fn discover(&self, request: DiscoveryRequest) -> Result<DiscoveryResponse, DiscoveryError> {
        // TODO: 实现发现逻辑
        // 1. 解析查询
        // 2. 应用过滤条件
        // 3. 匹配智能体
        // 4. 如果需要，执行转发
        // 5. 聚合结果
        
        Ok(DiscoveryResponse::success(DiscoveryResult::new()))
    }
    
    async fn register_agent(&self, acs: serde_json::Value) -> Result<(), DiscoveryError> {
        self.storage.store(acs).await
    }
    
    async fn unregister_agent(&self, aic: &str) -> Result<(), DiscoveryError> {
        self.storage.remove(aic).await
    }
    
    async fn update_agent(&self, aic: &str, acs: serde_json::Value) -> Result<(), DiscoveryError> {
        self.storage.update(aic, acs).await
    }
}
