#!/bin/bash
#
# Apple Battery Saver - Installation
# Aufruf:  sudo ./install.sh
#
set -euo pipefail

LABEL="de.smallmountains.batterysaver"
SRC="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

BIN_DST=/usr/local/bin/battery-saver.sh
CONF_DST=/usr/local/etc/battery-saver.conf
PLIST_DST="/Library/LaunchDaemons/${LABEL}.plist"

if [ "$(id -u)" -ne 0 ]; then
    echo "Dieses Skript muss als root laufen:  sudo ./install.sh" >&2
    exit 1
fi

echo "Apple Battery Saver - Installation"
echo "=================================="

# --- Programm ---------------------------------------------------------------
install -d -m 755 /usr/local/bin
install -m 755 -o root -g wheel "${SRC}/battery-saver.sh" "$BIN_DST"
echo "  Programm      -> ${BIN_DST}"

# --- Konfiguration ----------------------------------------------------------
install -d -m 755 /usr/local/etc
if [ -f "$CONF_DST" ]; then
    echo "  Konfiguration -> ${CONF_DST} (vorhanden, bleibt unverändert)"
else
    install -m 644 -o root -g wheel "${SRC}/battery-saver.conf" "$CONF_DST"
    echo "  Konfiguration -> ${CONF_DST}"
fi

# --- Logdatei ---------------------------------------------------------------
touch /var/log/battery-saver.log
chmod 644 /var/log/battery-saver.log
chown root:wheel /var/log/battery-saver.log

# --- LaunchDaemon -----------------------------------------------------------
# Falls bereits geladen, erst sauber entladen.
if launchctl print "system/${LABEL}" >/dev/null 2>&1; then
    echo "  Vorhandenen Dienst entladen ..."
    launchctl bootout "system/${LABEL}" 2>/dev/null || true
fi

install -m 644 -o root -g wheel "${SRC}/${LABEL}.plist" "$PLIST_DST"
echo "  LaunchDaemon  -> ${PLIST_DST}"

if ! launchctl bootstrap system "$PLIST_DST" 2>/dev/null; then
    # Fallback für ältere macOS-Versionen
    launchctl load -w "$PLIST_DST"
fi

# --- Prüfung ----------------------------------------------------------------
echo
if launchctl print "system/${LABEL}" >/dev/null 2>&1; then
    echo "Dienst läuft."
else
    echo "WARNUNG: Dienst konnte nicht gestartet werden." >&2
    exit 1
fi

echo
echo "Fertig. Nützliche Befehle:"
echo "  battery-saver.sh --status                  Messwerte und Bewertung"
echo "  sudo battery-saver.sh --test               Logik simulieren"
echo "  tail -f /var/log/battery-saver.log         Protokoll mitlesen"
echo "  sudo ./uninstall.sh                        Deinstallieren"
echo
"$BIN_DST" --status || true