package main

import (
	"fmt"
	"os"
)

func logicalPWD() {
	dir, err := os.Getwd()
	if err != nil {
		fmt.Printf("%v error: %v", os.Args[0], err)
		os.Exit(1)
	}
	fmt.Println(dir)
}

func physicalPWD() {
	fmt.Println("Using physical WD")
}

func usage() {
	fmt.Printf("usage: %v [-LP]\n", os.Args[0])
}

// if there's bs in os.Args[2], it ignores everything else
func parseArgs() []string {
	flags := []string{}
	return flags
}

// usePhysical parses command-line arguments and determines which mode should be used.
// If both -L and -P are specified, the last one shall apply.
// If neither -L nor -P is specified, the pwd utility shall behave as if -L had been specified.
func usePhysical() bool {
	if len(os.Args) > 1 {
		flags := parseArgs()
		flagsLen := len(flags)
		lastFlag := flags[flagsLen]
		if lastFlag == "L" {
			return false
		}
		if lastFlag == "P" {
			return true
		}
	}
	return false
}

func main() {
	if usePhysical() {
		physicalPWD()
	} else {
		logicalPWD()
	}
}