#!/bin/sh
export now="$(date +%s.%N)"

update_time=0

mkdir -p "$POMODORO_STATE_PATH"
load_or_init() {
	property="$1"
	default_value="$2"
	property_path="$POMODORO_STATE_PATH/$property"
	if [ -f "$property_path" ] ; then
		eval $property='"$(cat "$property_path")"'
	else
		eval $property='$default_value'
	fi
}
[ -z "$lap" ] && load_or_init lap 0
[ -z "$state" ] && load_or_init state 'reset'
[ -z "$time" ] && load_or_init time 0.0
[ "$time" = "0.0" ] && update_time=1

# calculate remaining time on timer
if [ -z "$remaining" ] ; then
	remaining="$time"
	[ "$state" = 'running' ] && remaining="$(echo "( $time - $now ) / 1" | bc)"
fi

# go to next lap if this timer expired
if [ "$state" = 'running' ] && [ "${remaining#-}" != "${remaining}" ] ; then
	lap=$(( $lap + 1 ))
	state='paused'
	update_time=1
fi

# update remaining time if in reset
[ "$state" = 'reset' ] && update_time=1

if [ $update_time -eq 1 ] ; then
	time="$POMODORO_NORMAL_DURATION"
	[ $(( $lap % $POMODORO_BREAK_SHORT_INTERVAL )) -eq $(( $POMODORO_BREAK_SHORT_INTERVAL - 1 )) ] && time=$POMODORO_BREAK_SHORT_DURATION
	[ $(( $lap % $POMODORO_BREAK_LONG_INTERVAL )) -eq $(( $POMODORO_BREAK_LONG_INTERVAL - 1 )) ] && time=$POMODORO_BREAK_LONG_DURATION
	remaining="$time"
fi

# save state
save_state() {
	mkdir -p "$POMODORO_STATE_PATH"
	echo "$lap" > "$POMODORO_STATE_PATH/lap"
	echo "$state" > "$POMODORO_STATE_PATH/state"
	echo "$time" > "$POMODORO_STATE_PATH/time"
}

# export state variables
export lap state time