package cli

import (
	"flag"
	"fmt"
)

type CLIOptions struct {
	Input   string
	Verbose bool
}

func ParseOptions(args []string) (*CLIOptions, error) {
	// Parse flags and arguments.
	verbose := flag.Bool("v", false, "Verbosity. If set, the program will print logs.")
	flag.Parse()

	if flag.NArg() == 0 {
		return nil, fmt.Errorf("No input given.")
	} else if flag.NArg() > 1 {
		return nil, fmt.Errorf("More than 1 command-line argument.")
	}

	return &CLIOptions{
		Input:   flag.Arg(0),
		Verbose: *verbose,
	}, nil
}