#! /bin/bash

pick_date() {
  YEAR=${YEAR:-22}

  while read -p 'Month? ' -r MONTH; do
    [ -z $MONTH ] && MONTH=$(date +%m)
    MONTH=$(printf "%02d" $MONTH)
    date -d $YEAR-$MONTH-01 &>/dev/null && break
  done

  while read -p 'Day? ' -r DAY; do
    [ -z $DAY ] && DAY=$(date +%d)
    DAY=$(printf "%02d" $DAY)
    date -d $YEAR-$MONTH-$DAY &>/dev/null && break
  done

  FILE=~/vimwiki/diary/20$YEAR-$MONTH-$DAY.md
  vim -c 'Goyo' $FILE
}

print_today() {
  cat ~/vimwiki/diary/$(date --iso-8601).md
}

edit_today() {
  vim ~/vimwiki/diary/$(date --iso-8601).md
}

add_entry() {
  echo - "$@" >>~/vimwiki/diary/$(date --iso-8601).md
}

case "$1" in
  "")
    pick_date ;;
  p)
    print_today ;;
  today)
    edit_today ;;
  *)
    add_entry "$@" ;;
esac