/*
   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 (
	"fmt"
	"io"

	"github.com/sirupsen/logrus"
	"github.com/spf13/cobra"
)

func FindAllFiles(state *State, files chan string) {
	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)

	filesiter := tree.Files()
	for {
		f, err := filesiter.Next()
		if err == io.EOF {
			break
		}
		if err != nil {
			state.ErrChannel <- err
			continue
		}

		if f == nil {
			state.ErrChannel <- fmt.Errorf("'f' is nil. File a BUG report please")
			continue
		}

		isbin, err := f.IsBinary()
		if err != nil {
			state.ErrChannel <- err
			continue
		}

		if !isbin && f.Mode.IsFile() {
			files <- f.Name
		}
	}

	cobra.CheckErr(err)
	logrus.Debug("closing files channel")
	state.WaitGroup.Done()
	close(files)
}