/*
Copyright © 2019 Darko Luketic <info@icod.de>

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 cmd

import (
	"fmt"
	"net"
	"net/http"
	"os"
	"strings"
	"time"

	"github.com/dalu/chromedom/server"
	"github.com/spf13/cobra"
)

var (
	binary   string
	duration time.Duration
	maxmem   int
	addr     string
)

// serveCmd represents the serve command
var serveCmd = &cobra.Command{
	Use:   "serve",
	Short: "",
	Long:  ``,
	RunE: func(cmd *cobra.Command, args []string) error {
		s := http.DefaultServeMux
		h := server.NewHandler(binary, duration, maxmem)
		s.Handle("/", h)
		if strings.HasPrefix(addr, "unix:") {
			return runUnix(strings.TrimPrefix(addr, "unix:"), s)
		} else {
			fmt.Printf("Listening and serving HTTP on %s", addr)
			return http.ListenAndServe(addr, s)
		}
	},
}

func runUnix(file string, engine *http.ServeMux) (err error) {
	fmt.Printf("Listening and serving HTTP on unix:/%s", file)
	os.Remove(file)
	listener, err := net.Listen("unix", file)
	if err != nil {
		return
	}
	defer listener.Close()
	if err := os.Chmod(file, 0777); err != nil {
		return err
	}
	err = http.Serve(listener, engine)
	return
}

func init() {
	rootCmd.AddCommand(serveCmd)

	serveCmd.Flags().StringVarP(&binary, "binary", "b", "/usr/bin/google-chrome", "chrome, chromium or headless binary path")
	serveCmd.Flags().DurationVarP(&duration, "duration", "d", 60*time.Minute, "how long the values live in the cache")
	serveCmd.Flags().IntVarP(&maxmem, "maxmem", "m", 512, "maximum memory in MB the cache may use")
	serveCmd.Flags().StringVarP(&addr, "addr", "a", "localhost:9292", "ip:port pair to listen on, or prefixed with unix: the unix socket path to listen on")
}