#!/usr/bin/env bash

set -euo pipefail

check_command() {
  if [ ! -x "$(command -v "$1")" ]; then
    echo "No $1 executable"
    exit 1
  fi
}

main() {
  check_command tesseract
  check_command scrot
  check_command mogrify
  check_command xclip

  TEMP_FILE=$(mktemp --suffix .png)
  trap 'rm "$TEMP_FILE"' EXIT

  ocr_language=${1:-eng}

  scrot --select --quality 100 --overwrite "$TEMP_FILE" &&
    mogrify -modulate 100,0 -resize 400% "$TEMP_FILE" &&
    tesseract -l "$ocr_language" "$TEMP_FILE" - 2>/dev/null | xclip -sel clip
}

main "$@"