[Unit]
Description=AITBC Production Blockchain Node
After=network.target postgresql.service redis.service
Wants=postgresql.service redis.service

[Service]
Type=simple
User=root
Group=root
WorkingDirectory=/opt/aitbc
Environment=PATH=/usr/bin:/usr/local/bin:/usr/bin:/bin
Environment=NODE_ID=aitbc
Environment=PYTHONPATH=/opt/aitbc/production/services
EnvironmentFile=/opt/aitbc/production/.env

# Production execution
ExecStart=/opt/aitbc/venv/bin/python /opt/aitbc/production/services/blockchain_simple.py
ExecReload=/bin/kill -HUP $MAINPID
KillMode=mixed
TimeoutStopSec=10

# Production reliability
Restart=always
RestartSec=5
StartLimitBurst=5
StartLimitIntervalSec=60

# Production logging
StandardOutput=journal
StandardError=journal
SyslogIdentifier=aitbc-blockchain-production

# Production security
NoNewPrivileges=true
ProtectSystem=strict
ProtectHome=true
ReadWritePaths=/var/lib/aitbc/data/blockchain /var/log/aitbc/production/blockchain

# Production performance
LimitNOFILE=65536
LimitNPROC=4096
MemoryMax=2G
CPUQuota=50%

[Install]
WantedBy=multi-user.target