package filter

import (
	"os"
	"path/filepath"
	"strings"
)

type Filter struct {
	MaxSize    int64
	Extensions []string
	Ignores    []string
}

func (f *Filter) ShouldSkipDir(name string) bool {
	if strings.HasPrefix(name, ".") {
		return true
	}
	for _, pattern := range f.Ignores {
		matched, _ := filepath.Match(pattern, name)
		if matched {
			return true
		}
	}
	return false
}

func (f *Filter) ShouldSkipFile(path, name string, info os.FileInfo) bool {
	if strings.HasPrefix(name, ".") {
		return true
	}

	for _, pattern := range f.Ignores {
		matched, _ := filepath.Match(pattern, name)
		if matched {
			return true
		}
	}

	ext := filepath.Ext(path)
	for _, bad := range f.Extensions {
		if strings.EqualFold(ext, bad) {
			return true
		}
	}

	if info.Size() > f.MaxSize {
		return true
	}

	return false
}

func IsSymlink(path string) bool {
	info, err := os.Lstat(path)
	if err != nil {
		return false
	}
	return info.Mode()&os.ModeSymlink != 0
}