// Copyright 2015 CoreOS, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package omaha

import (
	"net"
	"net/http"
)

func NewServer(addr string, updater Updater) (*Server, error) {
	l, err := net.Listen("tcp", addr)
	if err != nil {
		return nil, err
	}

	mux := http.NewServeMux()

	srv := &http.Server{
		Addr:    addr,
		Handler: mux,
	}

	s := &Server{
		Updater: updater,
		Mux:     mux,
		l:       l,
		srv:     srv,
	}

	h := &OmahaHandler{s}
	mux.Handle("/v1/update", h)
	mux.Handle("/v1/update/", h)

	return s, nil
}

type Server struct {
	Updater

	Mux *http.ServeMux

	l   net.Listener
	srv *http.Server
}

func (s *Server) Serve() error {
	err := s.srv.Serve(s.l)
	if isClosed(err) {
		// gracefully quit
		err = nil
	}
	return nil
}

func (s *Server) Destroy() error {
	return s.l.Close()
}

func (s *Server) Addr() net.Addr {
	return s.l.Addr()
}