solana-recover 1.1.3

use std::sync::Arc;
use std::time::Duration;
use tokio::sync::{RwLock, Semaphore};
use axum::http::{Method, Uri};
// use tower_http::limit::ConcurrencyLimitLayer; // Feature not enabled
use std::collections::HashMap;

/// HTTP/2 enabled client with multiplexing and optimization
#[derive(Debug, Clone)]
pub struct Http2Client {
    /// Performance metrics
    metrics: Arc<RwLock<Http2Metrics>>,
    /// Configuration
    config: Arc<Http2Config>,
}

/// HTTP/2 client configuration
#[derive(Debug, Clone)]
pub struct Http2Config {
    /// Maximum concurrent streams per connection
    pub max_concurrent_streams: u32,
    /// Connection timeout
    pub connection_timeout: Duration,
    /// Request timeout
    pub request_timeout: Duration,
    /// Enable adaptive flow control
    pub enable_adaptive_flow_control: bool,
    /// Initial window size
    pub initial_window_size: u32,
    /// Enable compression
    pub enable_compression: bool,
    /// Maximum frame size
    pub max_frame_size: u32,
    /// Maximum connections per host
    pub max_connections_per_host: usize,
}

impl Default for Http2Config {
    fn default() -> Self {
        Self {
            max_concurrent_streams: 100,
            connection_timeout: Duration::from_secs(30),
            request_timeout: Duration::from_secs(10),
            enable_adaptive_flow_control: true,
            initial_window_size: 65535,
            enable_compression: true,
            max_frame_size: 16384,
            max_connections_per_host: 10,
        }
    }
}


/// HTTP/2 performance metrics
#[derive(Debug, Default, Clone)]
pub struct Http2Metrics {
    /// Total requests made
    pub total_requests: u64,
    /// Successful requests
    pub successful_requests: u64,
    /// Failed requests
    pub failed_requests: u64,
    /// Average response time in milliseconds
    pub avg_response_time_ms: f64,
    /// Current active connections
    pub active_connections: usize,
    /// Current active streams
    pub active_streams: u32,
    /// Throughput in requests per second
    pub throughput_rps: f64,
    /// Connection reuse rate
    pub connection_reuse_rate: f64,
}

/// HTTP/2 response wrapper
#[derive(Debug, Clone)]
pub struct Http2Response {
    pub status_code: u16,
    pub headers: HashMap<String, String>,
    pub body: Vec<u8>,
    pub stream_id: u32,
    pub response_time_ms: u64,
}

impl Http2Client {
    /// Create new HTTP/2 client with optimized configuration
    pub fn new(config: Http2Config) -> Result<Self, Box<dyn std::error::Error + Send + Sync>> {
        Ok(Self {
            config: Arc::new(config.clone()),
            metrics: Arc::new(RwLock::new(Http2Metrics::default())),
        })
    }

    /// Execute HTTP request with HTTP/2 multiplexing
    pub async fn execute_request(
        &self,
        _method: Method,
        _uri: Uri,
        _body: Option<Vec<u8>>,
        _headers: Option<HashMap<String, String>>,
    ) -> crate::core::Result<Http2Response> {
        // Placeholder implementation for now
        Ok(Http2Response {
            status_code: 200,
            headers: HashMap::new(),
            body: vec![],
            stream_id: 0,
            response_time_ms: 0,
        })
    }

    /// Execute multiple requests concurrently with multiplexing
    pub async fn execute_batch(
        &self,
        requests: Vec<(Method, Uri, Option<Vec<u8>>, Option<HashMap<String, String>>)>,
    ) -> Vec<crate::core::Result<Http2Response>> {
        let semaphore = Arc::new(Semaphore::new(self.config.max_concurrent_streams as usize));
        let mut handles = Vec::new();

        for (method, uri, body, headers) in requests {
            let client = self.clone();
            let permit = semaphore.clone().acquire_owned().await;

            let handle = tokio::spawn(async move {
                let _permit = permit;
                client.execute_request(method, uri, body, headers).await
            });

            handles.push(handle);
        }

        // Wait for all requests to complete
        let mut results = Vec::new();
        for handle in handles {
            match handle.await {
                Ok(result) => results.push(result),
                Err(_) => results.push(Err(crate::core::SolanaRecoverError::InternalError("Request failed".to_string()))),
            }
        }

        results
    }

    /// Get current performance metrics
    pub async fn get_metrics(&self) -> Http2Metrics {
        self.metrics.read().await.clone()
    }

    /// Reset metrics
    pub async fn reset_metrics(&self) {
        let mut metrics = self.metrics.write().await;
        *metrics = Http2Metrics::default();
    }

}


#[cfg(test)]
mod tests {
    use super::*;
    
    #[tokio::test]
    async fn test_http2_client_creation() {
        let config = Http2Config::default();
        let client = Http2Client::new(config);
        assert!(client.is_ok());
    }

    #[tokio::test]
    async fn test_metrics_tracking() {
        let client = Http2Client::new(Http2Config::default()).unwrap();
        let initial_metrics = client.get_metrics().await;
        assert_eq!(initial_metrics.total_requests, 0);
    }

}