#!/bin/bash

me="$(readlink -f "$0")"
timeout=300
notify=$((timeout/10))

configure() {
    xset s $((timeout - notify)) $notify
    xset dpms $((timeout * 3)) $((timeout * 32 / 10)) $((timeout * 34 / 10))
}
dimmer() {
    systemctl --user --no-block $1 xss-dimmer@$notify.service
}

case "$1" in
    start)
        configure
        exec xss-lock --session=${XDG_SESSION_ID} --notifier="$me notify" --transfer-sleep-lock "$me" lock
        ;;
    dim|notify)
        echo "notify: start (idle: $(xprintidle))"
        trap 'echo notify: user activity; dimmer stop; kill %% 2> /dev/null; exit 0' HUP  # user activity
        trap 'echo notify: locker started; kill %% 2> /dev/null; exit 0' TERM # locker started
        dimmer start
        sleep infinity &
        wait
        echo "notify: end"
        ;;
    lock)
        echo "lock: lock screen (idle: $(xprintidle))"
        # Something may have meddled with screensaver settings
        configure
        # Pause music player and notifications
        playerctl -a pause
        dunstctl_state=$(dunstctl is-paused)
        dunstctl set-paused true
        # Then, lock screen
        env XSECURELOCK_SAVER=$HOME/.config/i3/bin/xsecurelock-saver \
            `# Disable RandR 1.5 support to make screensaver spans accross the whole monitor` \
            XSECURELOCK_NO_XRANDR15=1 \
            `# Disable RandR when we know we have a single monitor` \
            XSECURELOCK_NO_XRANDR=$($(grep -qFwx 1 $XDG_RUNTIME_DIR/i3/outputs.txt 2> /dev/null) && echo 1 || echo 0) \
            `# Delay mapping saver window by 500ms to give some time to saver to start` \
            XSECURELOCK_SAVER_DELAY_MS=500 \
            `# Do not kill screensaver when DPMS is enabled` \
            XSECURELOCK_SAVER_STOP_ON_BLANK=0 \
            `# Do not mess with DPMS settings` \
            XSECURELOCK_BLANK_TIMEOUT=-1 \
            `# Image and text for saver` \
            XSECURELOCK_SAVER_IMAGE=$XDG_RUNTIME_DIR/i3/current-wallpaper.png \
            XSECURELOCK_SAVER_WEATHER=$XDG_RUNTIME_DIR/i3/weather.txt \
            `# Font for authentication window` \
            XSECURELOCK_FONT="Iosevka Term SS18" \
            `# Timeout for authentication window` \
            XSECURELOCK_AUTH_TIMEOUT=10 \
            xsecurelock
        echo "lock: unlock screen"
        # After unlocking screen, stop dimmer, restore notifications
        dimmer stop
        dunstctl set-paused ${dunstctl_state}
        # Hack around an issue with brightness
        [[ "$(uname -n)" != "wally" ]] || brightnessctl -q set $(brightnessctl get)
        ;;
esac