package file

import (
	"io"
	"os"
	"path"
	"strings"
)

// GetExt get the file ext
func GetExt(fileName string) string {
	return path.Ext(fileName)
}

func CheckNotExist(src string) bool {
	_, err := os.Stat(src)

	return os.IsNotExist(err)
}

// IsNotExistMkDir create a directory if it does not exist
func IsNotExistMkDir(src string) error {
	if notExist := CheckNotExist(src); notExist {
		if err := MkDir(src); err != nil {
			return err
		}
	}

	return nil
}

// MkDir create a directory
func MkDir(src string) error {
	err := os.MkdirAll(src, os.ModePerm)
	if err != nil {
		return err
	}
	os.Chmod(src, 0o777)

	return nil
}

// IsNotExistMkDir create a directory if it does not exist
func IsNotExistCreateFile(src string) error {
	if notExist := CheckNotExist(src); notExist {
		if err := CreateFile(src); err != nil {
			return err
		}
	}

	return nil
}

func Exists(path string) bool {
	_, err := os.Stat(path) // os.Stat获取文件信息
	if err != nil {
		return os.IsExist(err)
	}
	return true
}

func CreateFile(path string) error {
	file, err := os.Create(path)
	if err != nil {
		return err
	}
	defer file.Close()
	return nil
}

func ReadFullFile(path string) []byte {
	file, err := os.Open(path)
	if err != nil {
		return []byte("")
	}
	defer file.Close()
	content, err := io.ReadAll(file)
	if err != nil {
		return []byte("")
	}
	return content
}

/**
 * @description:
 * @param {*} src
 * @param {*} dst
 * @param {string} style
 * @return {*}
 * @method:
 * @router:
 */
func CopySingleFile(src, dst, style string) error {
	var err error
	var srcfd *os.File
	var dstfd *os.File
	var srcinfo os.FileInfo

	if Exists(dst) {
		if style == "skip" {
			return nil
		} else {
			os.Remove(dst)
		}
	}

	if srcfd, err = os.Open(src); err != nil {
		return err
	}
	defer srcfd.Close()

	if dstfd, err = os.Create(dst); err != nil {
		return err
	}
	defer dstfd.Close()

	if _, err = io.Copy(dstfd, srcfd); err != nil {
		return err
	}
	if srcinfo, err = os.Stat(src); err != nil {
		return err
	}
	return os.Chmod(dst, srcinfo.Mode())
}

func WriteToPath(data []byte, path, name string) error {
	fullPath := path
	if strings.HasSuffix(path, "/") {
		fullPath += name
	} else {
		fullPath += "/" + name
	}
	IsNotExistCreateFile(fullPath)
	file, err := os.OpenFile(fullPath,
		os.O_WRONLY|os.O_TRUNC|os.O_CREATE,
		0o666,
	)
	if err != nil {
		return err
	}
	defer file.Close()
	_, err = file.Write(data)

	return err
}