package cli

import (
	"flag"
	"fmt"
	"log/slog"
	"os"
)

type CLIOptions struct {
	Input string
}

func ParseOptions(args []string) (*CLIOptions, error) {
	slog.Info("Parsing CLI arguments.", "args", os.Args)

	// Parse flags and arguments.
	flag.Parse()

	switch flag.NArg() {
	case 0:
		return nil, fmt.Errorf("No input given.")
	case 1:
		return &CLIOptions{Input: flag.Arg(0)}, nil
	default:
		return nil, fmt.Errorf("More than 1 command-line argument.")
	}
}