// This file is part of the happyDomain (R) project.
// Copyright (c) 2020-2024 happyDomain
// Authors: Pierre-Olivier Mercier, et al.
//
// This program is offered under a commercial and under the AGPL license.
// For commercial licensing, contact us at <contact@happydomain.org>.
//
// For AGPL licensing:
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

package config // import "git.happydns.org/happyDomain/config"

import (
	"bufio"
	"fmt"
	"os"
	"strings"
)

// parseFile opens the file at the given filename path, then treat each line
// not starting with '#' as a configuration statement.
func (o *Options) parseFile(filename string) error {
	fp, err := os.Open(filename)
	if err != nil {
		return err
	}
	defer fp.Close()

	scanner := bufio.NewScanner(fp)
	n := 0
	for scanner.Scan() {
		n += 1
		line := strings.TrimSpace(scanner.Text())
		if len(line) > 0 && !strings.HasPrefix(line, "#") && strings.Index(line, "=") > 0 {
			err := o.parseLine(line)
			if err != nil {
				return fmt.Errorf("%v:%d: error in configuration: %w", filename, n, err)
			}
		}
	}

	return nil
}