[Unit]
Description=IoT Platform Service
After=network.target mysqld.service redis.service

[Service]
Type=simple
User=root
Group=root
WorkingDirectory=/opt/iot-platform

# JVM options
Environment="JVM_OPTS=-server -Duser.timezone=Asia/Shanghai -Dfile.encoding=UTF-8 -Xms1g -Xmx2g -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=256m -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/opt/iot-platform/logs/heapdump.hprof -XX:+UseG1GC -XX:MaxGCPauseMillis=200"

# Load environment variables from .env (passwords, credentials)
EnvironmentFile=/opt/iot-platform/.env

ExecStart=/bin/bash -c 'exec java ${JVM_OPTS} -jar /opt/iot-platform/iot-platform.jar --spring.profiles.include=online'

ExecStop=/bin/kill -SIGTERM $MAINPID
ExecReload=/bin/kill -SIGUSR1 $MAINPID

Restart=always
RestartSec=10
StartLimitInterval=60
StartLimitBurst=3

# Graceful shutdown: wait up to 60s for the app to stop
TimeoutStopSec=60
KillSignal=SIGTERM

[Install]
WantedBy=multi-user.target