#!/usr/bin/bash
# credits: https://github.com/gpanders/dotfiles/blob/master/.local/bin/pomodoro

usage() {
  echo "Usage: $(basename "$0") [focus time] [short break] [long break]"
}

if [ "$1" = "-h" ]; then
  usage
  exit 0
fi

focus_time=${1:-25}
short_break=${2:-5}
long_break=${3:-15}

# Ensure all arguments are numbers
case $focus_time$short_break$long_break in
  *[!0-9]*)
    echo "Arguments must be positive integer numbers" >&2
    usage >&2
    exit 1
    ;;
esac

notify() {
  echo "$1"
  if command -v terminal-notifier >/dev/null 2>&1; then
    terminal-notifier -title 'Pomodoro' -message "$1"
  elif command -v notify-send >/dev/null 2>&1; then
    notify-send "$1"
  fi
}

countdown() {
  timer=$(($1 * 60))
  while true; do
    minutes=$((timer / 60))
    seconds=$((timer - 60*minutes))
    printf '\e[0K\r'  # Clear current line
    printf 'Remaining: %02d:%02d' "$minutes" "$seconds"

    [ $timer -eq 0 ] && break
    timer=$((timer - 1))
    sleep 1
  done
  printf '\n'
}

while true; do
  notify "Focus for $focus_time minutes"
  countdown "$focus_time"

  notify "Take a short break for $short_break minutes (1/4)"
  countdown "$short_break"

  notify "Focus for $focus_time minutes"
  countdown "$focus_time"

  notify "Take a short break for $short_break minutes (2/4)"
  countdown "$short_break"

  notify "Focus for $focus_time minutes"
  countdown "$focus_time"

  notify "Take a short break for $short_break minutes (3/4)"
  countdown "$short_break"

  notify "Focus for $focus_time minutes"
  countdown "$focus_time"

  notify "Take a long break for $long_break minutes (4/4)"
  countdown "$long_break"
done