package gogo

import (
	"io/ioutil"
	"os"
)

func FileReadAll(fileName string) []byte {
	if fileName == "" {
		LogErrorF("FileReadAll: %s is null", fileName)
		return nil
	}

	fileHandle, err := os.Open(fileName)
	if err == nil {
		defer fileHandle.Close()

		var fileBytes []byte
		if fileBytes, err = ioutil.ReadAll(fileHandle); err == nil {
			return fileBytes
		}
	}

	LogError(err)
	return nil
}

func FileMkdir(fileName string) bool {
	if fileName == "" {
		LogErrorF("FileMkdir: %s is null", fileName)
		return false
	}

	_, err := os.Stat(fileName)
	if err != nil {
		if err = os.MkdirAll(fileName, 0777); err == nil {
			return true
		}
	}

	LogError(err)
	return false
}

func FileDel(fileName string) bool {
	if fileName == "" {
		LogErrorF("FileDel: %s is null", fileName)
		return false
	}

	err := os.Remove(fileName)
	if err == nil {
		return true
	}

	LogError(err)
	return false
}

func FileAppend(fileName string, fileBytes []byte) bool {
	if fileName == "" {
		LogErrorF("FileAppend: %s is null", fileName)
		return false
	}

	if fileBytes == nil {
		LogErrorF("FileAppend: %s fileBytes is null", fileName)
		return false
	}

	fileHandle, err := os.OpenFile(fileName, os.O_CREATE|os.O_APPEND|os.O_RDWR, 0660)
	if err == nil {
		defer fileHandle.Close()
		if _, err = fileHandle.Write(fileBytes); err == nil {
			return true
		}
	}

	LogError(err)
	return false
}

// 判断文件是否存在
func FileExist(fileName string) bool {
	if fileName == "" {
		LogErrorF("FileExist: %s is null", fileName)
		return false
	}

	// 读取文件信息，判断文件是否存在
	_, err := os.Stat(fileName)
	if err == nil || os.IsExist(err) {
		return true
	}

	return false
}