// Copyright 2020-2026 Buf Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package bandeps

import (
	"maps"
	"sort"
	"strings"
)

func sortViolations(violations []Violation) {
	sort.Slice(
		violations,
		func(i int, j int) bool {
			one := violations[i]
			two := violations[j]
			if one.Package() < two.Package() {
				return true
			}
			if one.Package() > two.Package() {
				return false
			}
			if one.Dep() < two.Dep() {
				return true
			}
			if one.Dep() > two.Dep() {
				return false
			}
			return one.Note() < two.Note()
		},
	)
}

func getNonEmptyLines(s string) []string {
	var lines []string
	for line := range strings.SplitSeq(s, "\n") {
		if line := strings.TrimSpace(line); line != "" {
			lines = append(lines, line)
		}
	}
	return lines
}

func addMaps(base map[string]struct{}, toAdd ...map[string]struct{}) {
	for _, m := range toAdd {
		maps.Copy(base, m)
	}
}

func subtractMaps(base map[string]struct{}, toSubtract ...map[string]struct{}) {
	for _, m := range toSubtract {
		for k := range m {
			delete(base, k)
		}
	}
}
