#!/bin/sh

set -e

HOLIDAY=~/.local/holiday.csv
JQ_CSV_FMT='.holiday[] | "\(.date),\(.holiday),\(.name)"'

# update holiday database
update_holiday() {
    curl http://timor.tech/api/holiday/year/$(date +%Y) | jq "$JQ_CSV_FMT" -r > $HOLIDAY
    if [ $(date +%m) -eq 12 ]; then
        curl http://timor.tech/api/holiday/year/$(date -d '+1 year' ) >> $HOLIDAY
    fi
}

format_date() {
    date -d "$1" +%Y-%m-%d
}

is_holiday() {
    DATE=$(format_date $1)
    IS_HOLIDAY=$(awk -F, '$1=="'$DATE'" { print $2 }' $HOLIDAY)
    if [ -n "$IS_HOLIDAY" ]; then
        [ "$IS_HOLIDAY" = "true" ]
    else
        WEEKDAY=$(date -d "$1" +%w)
        [ "$WEEKDAY" -eq 6 ] || [ "$WEEKDAY" -eq 0 ]
    fi
}

# automatically update if file didn't exist
[ ! -f "$HOLIDAY" ] && update_holiday

case "$1" in
    update)
        update_holiday
        ;;
    *)
        is_holiday "$@"
        ;;
esac