package ffmpegServer

import (
	"context"
	"errors"
	ffmpegCmd "github.com/u2takey/ffmpeg-go"
	"os/exec"
	"path/filepath"
	"strings"
)

func PrepareUrl(url string) (string, bool) {
	if url == "" {
		return "", false
	}
	urlArr := strings.Split(url, "?")
	if len(urlArr) > 2 {
		return "", false
	}
	url = urlArr[0]
	return url, true
}

func PrepareStreamPath(streamPath string) (string, bool) {
	streamArr := strings.Split(streamPath, "/")
	if len(streamArr) != 2 {
		return "", false
	}
	streamPath = filepath.Join(streamArr...)
	return streamPath, true
}

func ProbeWithTimeout(url string, timeoutMs int) error {
	args := ffmpegCmd.ConvertKwargsToCmdLineArgs(ffmpegCmd.KwArgs{
		"i":        url,
		"stimeout": timeoutMs * 1000,
		"loglevel": "error",
	})
	ctx := context.Background()
	cmd := exec.CommandContext(ctx, "ffprobe", args...)
	errBuf := new(strings.Builder)
	cmd.Stderr = errBuf
	err := cmd.Run()
	if err != nil {
		errStr := strings.TrimSpace(errBuf.String())
		return errors.New(errStr)
	}
	return nil
}

func ProbeStreamsWithTimeout(url string, timeoutMs int) (string, error) {
	args := ffmpegCmd.ConvertKwargsToCmdLineArgs(ffmpegCmd.KwArgs{
		"i":            url,
		"show_streams": "",
		"stimeout":     timeoutMs * 1000,
		"of":           "json",
		"loglevel":     "error",
	})
	ctx := context.Background()
	cmd := exec.CommandContext(ctx, "ffprobe", args...)
	infoBuf, errBuf := new(strings.Builder), new(strings.Builder)
	cmd.Stdout = infoBuf
	cmd.Stderr = errBuf
	err := cmd.Run()
	if err != nil {
		errStr := strings.TrimSpace(errBuf.String())
		return "", errors.New(errStr)
	}
	infoStr := strings.TrimSpace(infoBuf.String())
	return infoStr, nil
}