#!/bin/sh

# Triggered by <Alt><Shift>n
# as defined in [org/gnome/settings-daemon/plugins/media-keys]
# in ~/.config/gnome-settings/key-bindings.ini
#
# See ~/.local/bin/night-light-toggle-schedule
# for the other half of the toggling logic
# and extensive documentation

set -eu


notify() {
    ID_FILE="${XDG_RUNTIME_DIR}/night-light-notification-id"
    _id=$(cat "$ID_FILE" 2>/dev/null || true)

    if [ -n "$_id" ]; then
        notify-send -p -t 5000 --replace-id="$_id" "Night Light" "$1" > "$ID_FILE" || rm -f "$ID_FILE"
    else
        notify-send -p -t 5000 "Night Light" "$1" > "$ID_FILE" || rm -f "$ID_FILE"
    fi
}


Schema=org.gnome.settings-daemon.plugins.color


if [ "$(gsettings get $Schema night-light-enabled)" = "true" ]; then

    active_before=$(gdbus call --session \
        --dest org.gnome.SettingsDaemon.Color \
        --object-path /org/gnome/SettingsDaemon/Color \
        --method org.freedesktop.DBus.Properties.Get \
        org.gnome.SettingsDaemon.Color NightLightActive)

    gsettings set $Schema night-light-enabled false

    if [ "$active_before" = "(<false>,)" ]; then
        notify "is now disabled, but the screen was not tinted anyways"
    fi

else

    gsettings set $Schema night-light-enabled true

    # We could start from our default warmth, as defined
    # in [org/gnome/settings-daemon/plugins/color]
    # in ~/.config/gnome-settings/misc.ini
    # but choose not to do that because this is meant to be
    # a plain on/off switch with no side effects
    # => Snapping is left to <Alt><Shift>Right, which is about
    #    warmth rather than about the feature being on or off
    #
    # _DEFAULT_TEMPERATURE=2200
    # current=$(gsettings get $Schema night-light-temperature | awk '{print $2}')
    #
    # if [ "$current" -gt $_DEFAULT_TEMPERATURE ]; then
    #     gsettings set $Schema night-light-temperature "uint32 $_DEFAULT_TEMPERATURE"
    # fi

    # Give the settings daemon a moment to recompute "NightLightActive"
    sleep 0.1

    active_after=$(gdbus call --session \
        --dest org.gnome.SettingsDaemon.Color \
        --object-path /org/gnome/SettingsDaemon/Color \
        --method org.freedesktop.DBus.Properties.Get \
        org.gnome.SettingsDaemon.Color NightLightActive)

    if [ "$active_after" = "(<false>,)" ]; then
        notify "is now enabled, but the schedule keeps it off for now"
    fi

fi