// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

package rpc

import (
	"context"
	"fmt"
	"net"

	"github.com/ethereum/go-ethereum/log"
)

// CreateIPCListener creates an listener, on Unix platforms this is a unix socket, on
// Windows this is a named pipe
func CreateIPCListener(endpoint string) (net.Listener, error) {
	return ipcListen(endpoint)
}

// ServeListener accepts connections on l, serving JSON-RPC on them.
func (srv *Server) ServeListener(l net.Listener) error {
	for {
		conn, err := l.Accept()
		if err != nil {
			return err
		}
		log.Trace(fmt.Sprint("accepted conn", conn.RemoteAddr()))
		go srv.ServeCodec(NewJSONCodec(conn), OptionMethodInvocation|OptionSubscriptions)
	}
}

// DialIPC create a new IPC client that connects to the given endpoint. On Unix it assumes
// the endpoint is the full path to a unix socket, and Windows the endpoint is an
// identifier for a named pipe.
//
// The context is used for the initial connection establishment. It does not
// affect subsequent interactions with the client.
func DialIPC(ctx context.Context, endpoint string) (*Client, error) {
	return newClient(ctx, func(ctx context.Context) (net.Conn, error) {
		return newIPCConnection(ctx, endpoint)
	})
}