#!/bin/sh

WTTR_URL="${WTTR_URL:-wttr.in}"
REPORT_FILE="${XDG_CACHE_HOME:-$HOME/.cache}/wttr-report"
UPDATE_INTERVAL_SECONDS=1800

notify() {
    notify-send "${0##*/}" "$@"
}

is_report_old() {
    current_time="$(date +'%s')"
    report_file_time="$(date -r "$REPORT_FILE" +'%s')"
    [ "$((current_time - report_file_time))" -ge "$UPDATE_INTERVAL_SECONDS" ]
}

if [ ! -f "$REPORT_FILE" ] || is_report_old; then
    curl -s "$WTTR_URL?format=%C\n%t\n" >"$REPORT_FILE"
    notify "Fetched new weather report."
fi

i=0
while IFS= read -r line; do
    case "$i" in
    0) conditions="${line%[[:space:]]}" ;;
    1) temperature="${line#+}" ;;
    esac
    i=$((i + 1))
done <"$REPORT_FILE"

printf '%s (%s)\n' "$conditions" "$temperature"