#!/bin/bash

YEAR="$(date "+%Y")"
EARLIEST_MOD_WEEK="$(date "+%V" --date="14 days ago")"
typeset -A WEEKS

# gather times
IFS=$'\n'
for line in $(xclip -sel c -o | grep $'\t' | tail -n +2); do
	# csv fields (1-bases)
	end="11,12"
	start="3,4"

	# get relevant parts and format to ISO 8601'ish format
	end="$(printf "%s" "$line" | cut -d$'\t' -f"$end" | sed -E 's/^....(..)\.(..)\.(.{4}) \t(.*) $/\3-\2-\1 \4/')"
	# check for valid end date & time in this year
	[[ $end ]] && [[ $end != $'\t' ]] || continue
	[[ ${end%%-*} = $YEAR ]] || continue
	# convert to UNIX timestamp
	end="$(date --date="$end" "+%s")"

	# get relevant parts and format to ISO 8601'ish format, then UNIX timestamp
	start="$(printf "%s" "$line" | cut -d$'\t' -f"$start" | sed -E 's/^....(..)\.(..)\.(.{4}) \t(.*) $/\3-\2-\1 \4/')"
	start="$(date --date="$start" "+%s")"

	diff=$((end - start))
	# subtract pauses
	(( diff <= 32400 )) || : $((diff -= 900))
	(( diff <= 21600 )) || : $((diff -= 1800))

	# sum the hours in the same week
	week=$(date "+%V" --date="@$start")
	: $((WEEKS[$week] += $diff))
done

# print
for week in "${!WEEKS[@]}"; do
	time="${WEEKS[$week]}"
	hrs=$(( time / 60 / 60 ))
	mins=$(( (time % (60 * 60)) / 60 ))

	# last 2 weeks are modifiable
	(( week >= EARLIEST_MOD_WEEK )) && modifiable="*" || modifiable=" "
	# 20h limit
	(( time <= 72000 )) && warn= || warn=" !!"

	printf "%s%s %02d:%02d%s\n" "$week" "$modifiable" "$hrs" "$mins" "$warn"
done | sort