/*
   Copyright © 2022 Sameer Rahmani <lxsameer@gnu.org>

   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 2
   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 core

import (
	"github.com/go-git/go-git/v5/plumbing/object"
	"github.com/spf13/cobra"
)

func FilterTargetFiles(state *State, storage *[]string) func(f *object.File) error {
	return func(f *object.File) error {
		isbin, err := f.IsBinary()
		if err != nil {
			return err
		}

		if !isbin && f.Mode.IsFile() {

			*storage = append(*storage, f.Name)
		}

		return nil
	}
}

func FindAllFiles(state *State) (*[]string, error) {
	if state == nil {
		panic("state is nil")
	}
	repo := state.Repo

	head, err := repo.Head()
	cobra.CheckErr(err)

	commit, err := repo.CommitObject(head.Hash())
	cobra.CheckErr(err)

	tree, err := commit.Tree()
	cobra.CheckErr(err)

	var files []string
	filter := FilterTargetFiles(state, &files)
	err = tree.Files().ForEach(filter)
	cobra.CheckErr(err)

	return &files, nil
}