use super::*;

// WebSocket transport for browser clients
/// Web socket transport.
pub struct WebSocketTransport {
    // Implementation would go here
}

impl Default for WebSocketTransport {
    fn default() -> Self {
        Self::new()
    }
}

impl WebSocketTransport {
    #[provable_contracts_macros::contract("pmat-core.yaml", equation = "check_compliance")]
    /// Create a new instance.
    pub fn new() -> Self {
        Self {}
    }
}

#[async_trait]
impl McpTransport for WebSocketTransport {
    async fn send(&self, _message: McpMessage) -> Result<(), McpError> {
        Ok(())
    }

    async fn receive(&self) -> Result<McpMessage, McpError> {
        Err(McpError {
            code: error_codes::INTERNAL_ERROR,
            message: "Not implemented".to_string(),
            data: None,
        })
    }

    async fn close(&self) -> Result<(), McpError> {
        Ok(())
    }
}

// HTTP/SSE transport for REST clients
/// Http transport.
pub struct HttpTransport {
    // Implementation would go here
}

impl Default for HttpTransport {
    fn default() -> Self {
        Self::new()
    }
}

impl HttpTransport {
    #[provable_contracts_macros::contract("pmat-core.yaml", equation = "check_compliance")]
    /// Create a new instance.
    pub fn new() -> Self {
        Self {}
    }
}

#[async_trait]
impl McpTransport for HttpTransport {
    async fn send(&self, _message: McpMessage) -> Result<(), McpError> {
        Ok(())
    }

    async fn receive(&self) -> Result<McpMessage, McpError> {
        Err(McpError {
            code: error_codes::INTERNAL_ERROR,
            message: "Not implemented".to_string(),
            data: None,
        })
    }

    async fn close(&self) -> Result<(), McpError> {
        Ok(())
    }
}

#[cfg_attr(coverage_nightly, coverage(off))]
#[cfg(test)]
mod coverage_tests {
    use super::*;

    // ============================================================
    // WebSocketTransport Tests
    // ============================================================

    #[test]
    fn test_websocket_transport_new() {
        let transport = WebSocketTransport::new();
        let _ = transport;
    }

    #[test]
    fn test_websocket_transport_default() {
        let transport = WebSocketTransport::default();
        let _ = transport;
    }

    #[tokio::test]
    async fn test_websocket_transport_send() {
        let transport = WebSocketTransport::new();

        // Create a test message
        let message = McpMessage::JsonRpc(JsonRpcMessage::Request(McpRequest {
            id: RequestId::Number(1),
            method: "test".to_string(),
            params: None,
        }));

        let result = transport.send(message).await;
        assert!(result.is_ok());
    }

    #[tokio::test]
    async fn test_websocket_transport_send_notification() {
        let transport = WebSocketTransport::new();

        let message = McpMessage::JsonRpc(JsonRpcMessage::Notification(McpNotification {
            method: "initialized".to_string(),
            params: None,
        }));

        let result = transport.send(message).await;
        assert!(result.is_ok());
    }

    #[tokio::test]
    async fn test_websocket_transport_send_response() {
        let transport = WebSocketTransport::new();

        let message = McpMessage::JsonRpc(JsonRpcMessage::Response(McpResponse {
            id: RequestId::Number(1),
            result: Some(serde_json::json!({"success": true})),
            error: None,
        }));

        let result = transport.send(message).await;
        assert!(result.is_ok());
    }

    #[tokio::test]
    async fn test_websocket_transport_receive() {
        let transport = WebSocketTransport::new();

        let result = transport.receive().await;

        assert!(result.is_err());
        let err = result.unwrap_err();
        assert_eq!(err.code, error_codes::INTERNAL_ERROR);
        assert!(err.message.contains("Not implemented"));
        assert!(err.data.is_none());
    }

    #[tokio::test]
    async fn test_websocket_transport_close() {
        let transport = WebSocketTransport::new();

        let result = transport.close().await;
        assert!(result.is_ok());
    }

    #[tokio::test]
    async fn test_websocket_transport_multiple_sends() {
        let transport = WebSocketTransport::new();

        for i in 0..10 {
            let message = McpMessage::JsonRpc(JsonRpcMessage::Request(McpRequest {
                id: RequestId::Number(i),
                method: format!("method_{}", i),
                params: None,
            }));

            let result = transport.send(message).await;
            assert!(result.is_ok());
        }
    }

    #[tokio::test]
    async fn test_websocket_transport_send_after_close() {
        let transport = WebSocketTransport::new();

        // Close first
        transport.close().await.unwrap();

        // Send after close - current implementation allows this
        let message = McpMessage::JsonRpc(JsonRpcMessage::Request(McpRequest {
            id: RequestId::Number(1),
            method: "test".to_string(),
            params: None,
        }));

        let result = transport.send(message).await;
        assert!(result.is_ok());
    }

    // ============================================================
    // HttpTransport Tests
    // ============================================================

    #[test]
    fn test_http_transport_new() {
        let transport = HttpTransport::new();
        let _ = transport;
    }

    #[test]
    fn test_http_transport_default() {
        let transport = HttpTransport::default();
        let _ = transport;
    }

    #[tokio::test]
    async fn test_http_transport_send() {
        let transport = HttpTransport::new();

        let message = McpMessage::JsonRpc(JsonRpcMessage::Request(McpRequest {
            id: RequestId::Number(1),
            method: "test".to_string(),
            params: None,
        }));

        let result = transport.send(message).await;
        assert!(result.is_ok());
    }

    #[tokio::test]
    async fn test_http_transport_send_notification() {
        let transport = HttpTransport::new();

        let message = McpMessage::JsonRpc(JsonRpcMessage::Notification(McpNotification {
            method: "initialized".to_string(),
            params: None,
        }));

        let result = transport.send(message).await;
        assert!(result.is_ok());
    }

    #[tokio::test]
    async fn test_http_transport_send_response() {
        let transport = HttpTransport::new();

        let message = McpMessage::JsonRpc(JsonRpcMessage::Response(McpResponse {
            id: RequestId::String("req-123".to_string()),
            result: Some(serde_json::json!({"data": "test"})),
            error: None,
        }));

        let result = transport.send(message).await;
        assert!(result.is_ok());
    }

    #[tokio::test]
    async fn test_http_transport_receive() {
        let transport = HttpTransport::new();

        let result = transport.receive().await;

        assert!(result.is_err());
        let err = result.unwrap_err();
        assert_eq!(err.code, error_codes::INTERNAL_ERROR);
        assert!(err.message.contains("Not implemented"));
        assert!(err.data.is_none());
    }

    #[tokio::test]
    async fn test_http_transport_close() {
        let transport = HttpTransport::new();

        let result = transport.close().await;
        assert!(result.is_ok());
    }

    #[tokio::test]
    async fn test_http_transport_multiple_sends() {
        let transport = HttpTransport::new();

        for i in 0..10 {
            let message = McpMessage::JsonRpc(JsonRpcMessage::Request(McpRequest {
                id: RequestId::Number(i),
                method: format!("method_{}", i),
                params: None,
            }));

            let result = transport.send(message).await;
            assert!(result.is_ok());
        }
    }

    #[tokio::test]
    async fn test_http_transport_send_after_close() {
        let transport = HttpTransport::new();

        // Close first
        transport.close().await.unwrap();

        // Send after close - current implementation allows this
        let message = McpMessage::JsonRpc(JsonRpcMessage::Request(McpRequest {
            id: RequestId::Number(1),
            method: "test".to_string(),
            params: None,
        }));

        let result = transport.send(message).await;
        assert!(result.is_ok());
    }

    // ============================================================
    // Cross-Transport Tests
    // ============================================================

    #[tokio::test]
    async fn test_both_transports_implement_mcp_transport() {
        // WebSocketTransport
        let ws: &dyn McpTransport = &WebSocketTransport::new();
        let _ = ws.close().await;

        // HttpTransport
        let http: &dyn McpTransport = &HttpTransport::new();
        let _ = http.close().await;
    }

    #[tokio::test]
    async fn test_transports_can_be_used_in_arc() {
        use std::sync::Arc;

        let ws_transport: Arc<dyn McpTransport> = Arc::new(WebSocketTransport::new());
        let http_transport: Arc<dyn McpTransport> = Arc::new(HttpTransport::new());

        // Both should work
        assert!(ws_transport.close().await.is_ok());
        assert!(http_transport.close().await.is_ok());
    }

    #[tokio::test]
    async fn test_transports_receive_error_codes() {
        let ws_transport = WebSocketTransport::new();
        let http_transport = HttpTransport::new();

        let ws_err = ws_transport.receive().await.unwrap_err();
        let http_err = http_transport.receive().await.unwrap_err();

        // Both should return the same error code
        assert_eq!(ws_err.code, http_err.code);
        assert_eq!(ws_err.code, error_codes::INTERNAL_ERROR);
    }

    // ============================================================
    // Message Type Coverage
    // ============================================================

    #[tokio::test]
    async fn test_send_with_complex_params() {
        let transport = WebSocketTransport::new();

        let message = McpMessage::JsonRpc(JsonRpcMessage::Request(McpRequest {
            id: RequestId::String("complex-request".to_string()),
            method: "tools/call".to_string(),
            params: Some(serde_json::json!({
                "name": "analyze",
                "arguments": {
                    "path": "/src/main.rs",
                    "options": {
                        "deep": true,
                        "languages": ["rust", "python"]
                    }
                }
            })),
        }));

        let result = transport.send(message).await;
        assert!(result.is_ok());
    }

    #[tokio::test]
    async fn test_send_error_response() {
        let transport = HttpTransport::new();

        let message = McpMessage::JsonRpc(JsonRpcMessage::Response(McpResponse {
            id: RequestId::Number(1),
            result: None,
            error: Some(McpError {
                code: error_codes::INVALID_PARAMS,
                message: "Missing required parameter".to_string(),
                data: Some(serde_json::json!({"parameter": "name"})),
            }),
        }));

        let result = transport.send(message).await;
        assert!(result.is_ok());
    }

    #[tokio::test]
    async fn test_send_notification_with_params() {
        let transport = WebSocketTransport::new();

        let message = McpMessage::JsonRpc(JsonRpcMessage::Notification(McpNotification {
            method: "notifications/resources/updated".to_string(),
            params: Some(serde_json::json!({
                "uri": "file:///path/to/file.rs",
                "contents": [{"text": "updated content"}]
            })),
        }));

        let result = transport.send(message).await;
        assert!(result.is_ok());
    }

    // ============================================================
    // Edge Cases
    // ============================================================

    #[tokio::test]
    async fn test_multiple_close_calls() {
        let ws_transport = WebSocketTransport::new();
        let http_transport = HttpTransport::new();

        // Multiple closes should not panic
        for _ in 0..5 {
            assert!(ws_transport.close().await.is_ok());
            assert!(http_transport.close().await.is_ok());
        }
    }

    #[tokio::test]
    async fn test_receive_called_multiple_times() {
        let transport = WebSocketTransport::new();

        // Multiple receives should consistently return error
        for _ in 0..5 {
            let result = transport.receive().await;
            assert!(result.is_err());
            assert_eq!(result.unwrap_err().code, error_codes::INTERNAL_ERROR);
        }
    }
}
