use crate::api::rpc::RpcHandler;
use crate::config::Config;
use anyhow::Result;
use http_body_util::{BodyExt, Full};
use hyper::body::Bytes;
use hyper::{Method, Request, Response, StatusCode};
use hyper_util::rt::TokioIo;
use std::sync::Arc;
use tracing::debug;

pub struct ApiHandler {
    config: Config,
    rpc_handler: Arc<RpcHandler>,
    // Add other handlers here (websocket, static files, etc.)
}

impl ApiHandler {
    pub async fn new(config: Config) -> Result<Self> {
        let rpc_handler = Arc::new(RpcHandler::new(config.clone()).await?);

        Ok(Self {
            config,
            rpc_handler,
        })
    }

    pub async fn handle_request<B>(&self, req: Request<B>) -> Result<Response<Full<Bytes>>>
    where
        B: http_body::Body<Data = Bytes> + Send + 'static,
        B::Error: std::fmt::Display,
    {
        let path = req.uri().path();
        let method = req.method();
        
        // Convert Incoming body to bytes using http_body_util::BodyExt
        let (parts, body) = req.into_parts();
        // hyper::body::Incoming implements http_body::Body, and BodyExt extends it
        use http_body_util::BodyExt;
        let collected = body.collect().await
            .map_err(|_e| anyhow::anyhow!("Failed to read body"))?;
        let body_bytes = collected.to_bytes();
        
        // Reconstruct request with Full<Bytes> body for RPC handler
        let req_with_bytes = Request::from_parts(parts, Full::new(body_bytes));

        debug!("{} {}", method, path);

        // Route requests
        match (method, path.as_str()) {
            (&Method::POST, "/rpc/v1") => {
                self.rpc_handler.handle(req_with_bytes).await
            }
            (&Method::GET, "/health") => {
                Ok(Response::builder()
                    .status(StatusCode::OK)
                    .body(Full::new(Bytes::from("OK")))
                    .unwrap())
            }
            _ => {
                Ok(Response::builder()
                    .status(StatusCode::NOT_FOUND)
                    .body(Full::new(Bytes::from("Not Found")))
                    .unwrap())
            }
        }
    }
}