package services

import (
	"bytes"
	"fmt"
	"os/exec"
	"strings"
)

func scanImage(args ...string) (string, error) {
	cmd := exec.Command("scanimage", args...)

	var stderr bytes.Buffer
	cmd.Stderr = &stderr

	var stdout bytes.Buffer
	cmd.Stdout = &stdout

	err := cmd.Run()
	if err != nil {
		return "", fmt.Errorf("error scanning: %v", stderr.String())
	}

	return stdout.String(), nil
}

func status() (string, error) {
	result, err := scanImage("--status")
	if err != nil {
		return "", fmt.Errorf("error getting status: %v", err)
	}
	return result, nil
}

func listDevices() ([]string, error) {
	result, err := scanImage("--list-devices")
	if err != nil {
		return nil, fmt.Errorf("error listing devices: %v", err)
	}

	return strings.Split(result, "\n"), nil
}

func startScan(outputFile string) (string, error) {
	result, err := scanImage("-d", "escl:https://printer:443", "--format", "pdf", "--output-file", outputFile)
	if err != nil {
		return "", fmt.Errorf("error scanning: %v", err)
	}

	return result, nil
}