#!/bin/bash

#tool for having time reference in your DnD game.
#It tracks time, date and moon phase
#1h of real time equals to 12h ingame

HOUR=8
MINUTE=0
SECOND=0
DOW="Mon"
MOON=0
MOON_DIR="D"
MOON_CNTR=$((12744*$MOON))
DAY=1
MONTH=1
YEAR=2300

#check arguments
for (( i=1; i<=$#; i++))
do
  if [[ "${!i}" =~ "H" ]]; then
    j=$((i+1))
    HOUR=${!j}
  elif [[ "${!i}" =~ "m" ]]; then
    j=$((i+1))
    MINUTE=${!j}
  elif [[ "${!i}" =~ "s" ]]; then
    j=$((i+1))
    SECOND=${!j}
  elif [[ "${!i}" =~ "d" ]]; then
    j=$((i+1))
    DOW=${!j}
  elif [[ "${!i}" =~ "l" ]]; then
    j=$((i+1))
    k=$((i+2))
    MOON=${!j}
    MOON_DIR=${!k}
    MOON_CNTR=$((12744*$MOON))
  elif [[ "${!i}" =~ "D" ]]; then
    j=$((i+1))
    DAY=${!j}
  elif [[ "${!i}" =~ "M" ]]; then
    j=$((i+1))
    MONTH=${!j}
  elif [[ "${!i}" =~ "Y" ]]; then
    j=$((i+1))
    YEAR=${!j}
  elif [[ "${!i}" =~ "h" ]]; then
    echo "Author: Angoosh Leviocki"
    echo "Script Usage:"
    echo "DnD_time.sh [OPTIONS]"
    echo "if options are empty, default time will be used"
    echo ""
    echo "OPTIONS:"
    echo "-H	sets hour"
    echo "-m	sets minute"
    echo "-s	sets second"
    echo "-d	sets day of week (Mon, Tue, Wed, Thu, Fri, Sat, Sun"
    echo "-l	sets moon phase in % and direction (D,C)"
    echo "-D	sets date day"
    echo "-M	sets date month"
    echo "-Y	sets date year"
    echo "-h	prints this help"
    exit 0
  fi
done

#1h = 12h in game
#708h = moon phase period = 3.54h = 1% = 12744s
#internal time counter for moon in seconds

clear

while true
do
  if [[ $MOON_DIR = "D" ]]; then
    MOON_CNTR=$((MOON_CNTR+12))
    if [[ $MOON_CNTR -ge 1274400 ]]; then
      MOON_DIR="C"
    fi
  else
    MOON_CNTR=$((MOON_CNTR-12))
    if [[ $MOON_CNTR -le 0 ]]; then
      MOON_DIR="D"
    fi
  fi
  #MOON=$(($MOON_CNTR / 1274400))
  MOON=$(echo "scale=2; ($MOON_CNTR*100)/1274400" | bc)

  SECOND=$((SECOND+12))

  if [[ $SECOND -ge 60 ]]; then
    SECOND=0
    MINUTE=$((MINUTE+1))
  fi
  if [[ $MINUTE -ge 60 ]]; then
    MINUTE=0
    HOUR=$((HOUR+1))
  fi
  if [[ $HOUR -ge 24 ]]; then
    HOUR=0

    if [[ $DOW = "Mon" ]]; then
      DOW="Tue"
    elif [[ $DOW = "Tue" ]]; then
      DOW="Wed"
    elif [[ $DOW = "Wed" ]]; then
      DOW="Thu"
    elif [[ $DOW = "Thu" ]]; then
      DOW="Fri"
    elif [[ $DOW = "Fri" ]]; then
      DOW="Sat"
    elif [[ $DOW = "Sat" ]]; then
      DOW="Sun"
    elif [[ $DOW = "Sun" ]]; then
      DOW="Mon"
    fi

    DAY=$((DAY+1))
    if [[ $MONTH -eq 1 || $MONTH -eq 3 || $MONTH -eq 5 || $MONTH -eq 7 || $MONTH -eq 9 || $MONTH -eq 11 ]]; then
      if [[ $DAY -gt 31 ]]; then
        MONTH=$((MONTH+1))
        DAY=1
      fi
    elif [[ $MONTH -eq 2 ]]; then
      if [[ $DAY -gt 28 ]]; then
        MONTH=$((MONTH+1))
        DAY=1
      fi
    else
      if [[ $DAY -gt 30 ]]; then
        MONTH=$((MONTH+1))
        DAY=1
      fi
    fi
    if [[ $MONTH -gt 12 ]]; then
      MONTH=1
      YEAR=$((YEAR+1))
    fi
  fi

  echo -e "\e[3A\e[KDATE: ${DOW} ${DAY}-${MONTH}-${YEAR}"
  echo -e "\e[KTIME: ${HOUR}:${MINUTE}:${SECOND}"
  echo -e "\e[KMOON: $MOON_DIR ${MOON}%"

  sleep 1
done