alarm

#!/bin/bash

# A simple alarm clock script
# Uses MPD (Music Player Daemon)

DEFAULT_TRACK="alarm.mp3" # Change this to a track in your library.

usage() {
    echo "Usage:"
    echo "  -s --set        Set a time for the alarm to go off (24h, e.g., 05:55)"
    echo "  -f --for        Set an alarm to go off after a period of time (e.g., 08:30 means in 8 hours 30 minutes)"
    echo "  -m --music      Path to music file, playlist, or directory (relative to your MPD music_directory!) [Optional]"
    echo "                  If not provided, will use default: '$DEFAULT_TRACK'"
    exit 1
}

play_alarm() {
    local AUDIO_PATH="$1"
    if ! pgrep mpd > /dev/null; then
        echo "MPD is not running. Starting MPD..."
        mpd
        sleep 2
    fi
    mpc stop
    mpc clear
    mpc add "$AUDIO_PATH"
    mpc volume 100
    mpc repeat on
    mpc play
}

if [[ $# -lt 2 ]]; then
    usage
fi

MODE=""
TIME=""
AUDIO_PATH=""

while [[ $# -gt 0 ]]; do
    case "$1" in
        -s|--set)
            MODE="set"
            TIME="$2"
            shift 2
            ;;
        -f|--for)
            MODE="for"
            TIME="$2"
            shift 2
            ;;
        -m|--music)
            AUDIO_PATH="$2"
            shift 2
            ;;
        *)
            usage
            ;;
    esac
done

if [[ -z "$MODE" || -z "$TIME" || -z "$AUDIO_PATH" ]]; then
    usage
fi

if [[ -z "$AUDIO_PATH" ]]; then
    AUDIO_PATH="$DEFAULT_TRACK"
    echo "No music specified. Using default: $AUDIO_PATH"
fi

# Verify music path (must be a path relative to your music directory)
if [[ "$AUDIO_PATH" = /* ]]; then
    echo "Error: Music path must be relative to your MPD music_directory."
    exit 1
fi

case "$MODE" in
    set)
        if ! [[ "$TIME" =~ ^([01]?[0-9]|2[0-3]):[0-5][0-9]$ ]]; then
            echo "Invalid time format: $TIME"
            usage
        fi
        NOW_SEC=$(date +%s)
        ALARM_SEC=$(date -d "today $TIME" +%s 2>/dev/null)
        if [ $? -ne 0 ]; then
            echo "Invalid date/time."
            exit 1
        fi
        if [ "$ALARM_SEC" -le "$NOW_SEC" ]; then
            ALARM_SEC=$(date -d "tomorrow $TIME" +%s)
        fi
        SLEEP_SEC=$((ALARM_SEC - NOW_SEC))
        echo "Alarm set for $TIME ($(date -d @$ALARM_SEC)), will go off in $((SLEEP_SEC/60)) minutes."
        ;;
    for)

        if ! [[ "$TIME" =~ ^([0-9]+):([0-5][0-9])$ ]]; then
            echo "Invalid period format: $TIME"
            usage
        fi
        HOURS="${BASH_REMATCH[1]}"
        MINUTES="${BASH_REMATCH[2]}"
        SLEEP_SEC=$((10#$HOURS * 3600 + 10#$MINUTES * 60))
        TARGET_TIME=$(date -d "+$HOURS hour +$MINUTES min" "+%Y-%m-%d %H:%M")
        echo "Alarm set to go off in $HOURS hours and $MINUTES minutes (at $TARGET_TIME)."
        ;;
    *)
        usage
        ;;
esac

sleep "$SLEEP_SEC"
play_alarm "$AUDIO_PATH"