package fileop

import (
	"os"

	"crazy-fox-backend-api/config"
	"crazy-fox-backend-api/model"
	"crazy-fox-backend-api/utils/zaplog"

	"crazy-fox-backend-api/global"
)

func Exist(path string) (bool, error) {
	_, err := os.Stat(path)
	if err != nil {
		if os.IsNotExist(err) {
			return false, nil
		}
		return false, err
	}

	return true, nil
}

// PathExists 文件目录是否存在
func PathExists(path string) bool {
	exist, err := Exist(path)
	if err != nil || !exist {
		return false
	}

	return IsDir(path)
}

// IsDir 判断所给路径是否为文件夹
func IsDir(path string) bool {
	s, err := os.Stat(path)
	if err != nil {
		return false
	}
	return s.IsDir()
}

// DirCreate 批量创建文件夹
func DirCreate(dirs ...string) (err error) {
	for _, v := range dirs {
		if !PathExists(v) {
			global.ZapLog.Info("create directory: " + v)
			if err = os.MkdirAll(v, os.ModePerm); err != nil {
				zaplog.Error("create directory: "+v, err)
				return err
			}
		}
	}
	return err
}

// DirList 目录下的文件列表
func DirList(path string) ([]model.FileInfo, error) {
	files, err := os.ReadDir(path)
	if err != nil {
		return nil, nil
	}

	fileList := make([]model.FileInfo, 0, len(files))
	for _, file := range files {
		info, err := file.Info()
		if err != nil {
			return nil, nil
		}

		fileTyp := FileType(info)
		fileList = append(fileList, model.FileInfo{
			Name:     info.Name(),
			ModDate:  info.ModTime().Format(config.DateTime),
			Type:     fileTyp,
			Perm:     info.Mode().String()[1:],
			TypeName: fileTypeName(fileTyp),
			Size:     fileSize(info),
		})
	}

	return fileList, nil
}

// fileSize 获取文件大小
func fileSize(info os.FileInfo) string {
	if info.IsDir() {
		return ""
	}

	return FileSizeFormat(uint64(info.Size()))
}