package utils

import (
	"encoding/base64"
	"io"
	"os"
	"os/exec"
	"strconv"
	"strings"

	"github.com/sirupsen/logrus"
	"gopkg.in/ini.v1"
)

// 缓存 timeZone 信息
var timeZoneCache string

// FileExists checks if a file exists and is not a directory before we
// try using it to prevent further errors.
func FileExists(filename string) bool {
	info, err := os.Stat(filename)
	if os.IsNotExist(err) {
		return false
	}
	return !info.IsDir()
}

// pbx 不能正确读取时区, 读取自定义文件  /etc/asterisk/ntp.conf
func GetLocationName() string {
	if timeZoneCache != "" {
		return timeZoneCache
	}
	filePath := "/etc/asterisk/ntp.conf"
	_, err := os.Stat(filePath)
	if err != nil {
		logrus.Error(err)
		return ""
	}
	iniFile, err := ini.Load(filePath)
	if err != nil {
		logrus.Error(err)
		return ""
	}
	timeZoneCache = iniFile.Section("ntp").Key("TZNAME").Value()
	logrus.Infof("use location %s", timeZoneCache)
	return timeZoneCache
}

func GetDuration(filePath string) (int, error) {
	cmd := exec.Command("soxi", "-D", filePath)
	output, err := cmd.Output()
	if err != nil {
		return 0, err
	}

	durationStr := strings.TrimSpace(string(output))
	duration, err := strconv.ParseFloat(durationStr, 64)
	if err != nil {
		return 0, err
	}
	return int(duration), nil
}

func AudioFileEncode(dstFile, srcFile string) error {
	data := "sripis123"
	encoded := base64.StdEncoding.EncodeToString([]byte(data))

	// Step 2: 创建一个新文件，写入 Base64 编码结果
	outputFile, err := os.Create(dstFile)
	if err != nil {
		return err
	}
	defer outputFile.Close()

	_, err = outputFile.WriteString(encoded)
	if err != nil {
		return err
	}

	// Step 3: 打开 audio.wav 文件
	audioFile, err := os.Open(srcFile)
	if err != nil {
		return err
	}
	defer audioFile.Close()

	// Step 4: 将 audio.wav 的内容追加到 output.bin 文件末尾
	_, err = audioFile.Seek(0, io.SeekStart) // 确保从文件开头读取
	if err != nil {
		return err
	}

	_, err = io.Copy(outputFile, audioFile)
	if err != nil {
		return err
	}
	return err
}