#!/usr/bin/env bash
set -e

# Toggles the nightlight (hyprsunset). Writes the new state to state.json
# (so the next home-manager rebuild realigns services.hyprsunset.enable
# via features/desktop/nightlight.nix) and flips the running systemd
# user unit for instant feedback. Reads nightlightTemperature from
# state.json so the value the user picked is honoured instead of a
# hardcoded constant.

STATE_DIR="$HOME/.config/nomarchy"
STATE_FILE="$STATE_DIR/state.json"
mkdir -p "$STATE_DIR"

[[ ! -f $STATE_FILE ]] && echo "{}" > "$STATE_FILE"

if [[ $NOMARCHY_TOGGLE_NIGHTLIGHT == "false" ]]; then
    NEW_VALUE="true"
    systemctl --user start hyprsunset.service 2>/dev/null || true
    TEMP=$(jq -r '.nightlightTemperature // 4000' "$STATE_FILE")
    notify-send -u low "  Nightlight enabled (${TEMP}K)"
else
    NEW_VALUE="false"
    systemctl --user stop hyprsunset.service 2>/dev/null || true
    notify-send -u low "  Nightlight disabled"
fi

TMP_JSON=$(mktemp)
jq --argjson val "$NEW_VALUE" '.nightlight = $val' "$STATE_FILE" > "$TMP_JSON" && mv "$TMP_JSON" "$STATE_FILE"

echo "Nightlight state set to $NEW_VALUE."