package main

import (
	"fmt"
	"os"
	"os/user"
	"strings"

	"gogs.bullercodeworks.com/brian/gosyphus"
)

func main() {
	var proc string
	if len(os.Args) > 1 {
		// The first argument is the executable that we want to serve
		proc = os.Args[1]
	}
	cwd, err := os.Getwd()
	wd := cwd
	wd = requestParam("Working Directory", wd, true)
	for !checkFileExists(proc) {
		if len(proc) > 0 {
			fmt.Println("Couldn't find file: " + proc)
		}
		proc = requestParam("Process", proc, true)
	}
	if !strings.HasPrefix(proc, "/") {
		proc = cwd + "/" + proc
	}
	var userName string
	user, err := user.Current()
	if err == nil {
		userName = user.Name
	}
	userName = requestParam("Username", userName, true)
	groupName := requestParam("Group Name", userName, true)
	//desc := requestParam("Description", "", false)
	outFile := requestParam("Output File", "", true)
	if !strings.HasSuffix(outFile, ".service") {
		outFile = outFile + ".service"
	}
	// TODO: Request Environment
	/*
		environ := os.Environ()
		for i := range environ {
			fmt.Println(environ[i])
		}
	*/
	g := gosyphus.NewService(wd, proc, userName, groupName)
	//g.Describe(desc)
	g.GenerateFile(outFile)
}

func requestParam(label, def string, req bool) string {
	var firstRun = true
	var newVal string
	for firstRun || (req && len(newVal) == 0) {
		fmt.Print(label)
		fmt.Print(" [")
		outDef := def
		if len(outDef) == 0 {
			outDef = "No default"
		}
		fmt.Print(outDef)
		fmt.Print("]: ")
		fmt.Scanf("%s", &newVal)
		if len(newVal) == 0 {
			newVal = def
		}
		firstRun = false
	}
	return newVal
}

func checkFileExists(fn string) bool {
	_, err := os.Stat(fn)
	if err == nil {
		return true
	}
	if os.IsNotExist(err) {
		return false
	}
	return true
}