package executor

import (
	"bufio"
	"io"
	"os/exec"
)

func ReadTimeCommandExecutor(singleLineCommand []string) []string {

	cmd := exec.Command(singleLineCommand[0], singleLineCommand[1:]...)
	stdout, err := cmd.StdoutPipe()
	if err != nil {
		log.ErrorF("command  %v stdout error => %v", singleLineCommand, err)
	}
	stderr, err := cmd.StderrPipe()
	if err != nil {
		log.ErrorF("command  %v stderr error => %v", singleLineCommand, err)
	}

	if err := cmd.Start(); err != nil {
		log.ErrorF("command  %v runtime error => %v", singleLineCommand, err)
	}

	var resultSlice []string
	resultSlice = append(resultSlice, copyOutput(stdout, resultSlice)...)
	resultSlice = append(resultSlice, copyOutput(stderr, resultSlice)...)

	if err := cmd.Wait(); err != nil {
		log.ErrorF("command  %v result error => %v", singleLineCommand, err)
	}

	//log.DebugF("real time exec result are %v", resultSlice)

	return resultSlice
}

func copyOutput(r io.Reader, resultSlice []string) []string {
	scanner := bufio.NewScanner(r)
	for scanner.Scan() {
		resultLine := scanner.Text()

		resultSlice = append(resultSlice, resultLine)
		// debug usage
		//fmt.Println(resultLine)
	}

	return resultSlice
}