/*
Copyright © 2025 filifa

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cmd

import (
	"fmt"
	"math/big"

	"github.com/spf13/cobra"
	"scm.dairydemon.net/filifa/mathtools/internal/lib"
)

var multiplicativeOrderBase string
var multiplicativeOrderModulus string

func multiplicativeOrder(cmd *cobra.Command, args []string) {
	g, ok := new(big.Int).SetString(multiplicativeOrderBase, 10)
	if !ok {
		cobra.CheckErr("invalid base " + multiplicativeOrderBase)
	}

	m, ok := new(big.Int).SetString(multiplicativeOrderModulus, 10)
	if !ok {
		cobra.CheckErr("invalid modulus " + multiplicativeOrderModulus)
	}

	k := lib.MultiplicativeOrder(g, m)
	fmt.Println(k)
}

// multiplicativeOrderCmd represents the multiplicativeOrder command
var multiplicativeOrderCmd = &cobra.Command{
	Use:   "multiplicative-order",
	Short: "Compute multiplicative order",
	Long:  `Compute the multiplicative order of a number given a modulus.`,
	Run:   multiplicativeOrder,
}

func init() {
	rootCmd.AddCommand(multiplicativeOrderCmd)

	// Here you will define your flags and configuration settings.

	// Cobra supports Persistent Flags which will work for this command
	// and all subcommands, e.g.:
	// multiplicativeOrderCmd.PersistentFlags().String("foo", "", "A help for foo")

	// Cobra supports local flags which will only run when this command
	// is called directly, e.g.:
	// multiplicativeOrderCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
	multiplicativeOrderCmd.Flags().StringVarP(&multiplicativeOrderBase, "base", "g", "", "base")
	multiplicativeOrderCmd.Flags().StringVarP(&multiplicativeOrderModulus, "modulus", "m", "", "modulus")

	multiplicativeOrderCmd.MarkFlagRequired("base")
	multiplicativeOrderCmd.MarkFlagRequired("modulus")
}