#!/bin/bash
# ABOUTME: Waybar-Wrapper für corsairctl — cached JSON-Output.
# ABOUTME: Verhindert dass mehrere Waybar-Bars gleichzeitig das HID-Gerät ansprechen.

CACHE="/tmp/corsairctl-waybar.json"
LOCK="/tmp/corsairctl-waybar.lock"
MAX_AGE=10
FALLBACK='{"text":"󰋋 ?","tooltip":"HS80: nicht erreichbar","class":"offline","percentage":0}'

# Cache frisch genug? Direkt ausgeben.
if [[ -f "$CACHE" ]] && [[ -s "$CACHE" ]]; then
    age=$(( $(date +%s) - $(stat -c %Y "$CACHE") ))
    if (( age < MAX_AGE )); then
        cat "$CACHE"
        exit 0
    fi
fi

# Lock holen, abfragen, cachen.
(
    flock -w 5 9 || { cat "$CACHE" 2>/dev/null || echo "$FALLBACK"; exit 0; }
    if corsairctl json > "${CACHE}.tmp" 2>/dev/null; then
        mv "${CACHE}.tmp" "$CACHE"
        cat "$CACHE"
    else
        rm -f "${CACHE}.tmp"
        echo "$FALLBACK"
    fi
) 9>"$LOCK"