# eg4-battery — local Docker deployment.
#
# Usage:
#   docker compose build     # one-time, after changes to Dockerfile / requirements / source
#   docker compose up -d     # start daemon in background
#   docker compose logs -f   # tail the daemon log
#   docker compose down      # stop + remove
#
# This deployment runs side-by-side with the systemd `eg4-battery.service`.
# Stop systemd before bringing this up, or each pack will be polled twice
# per cycle (and HA will see duplicate publishes from two MQTT clients):
#   sudo systemctl stop eg4-battery.service
#
# Side-by-side cutover, once verified:
#   sudo systemctl disable --now eg4-battery.service

services:
  eg4-battery:
    build: .
    image: eg4-battery:local
    container_name: eg4-battery
    restart: unless-stopped

    # USB-RS-485 adapters → daemon. The /dev/ttyUSBN device numbers can shift
    # on USB reshuffles; the by-id symlinks (mounted via the volume below)
    # are the stable identifiers the YAML config references.
    devices:
      - /dev/ttyUSB0:/dev/ttyUSB0
      - /dev/ttyUSB1:/dev/ttyUSB1
      - /dev/ttyUSB3:/dev/ttyUSB3

    # Read-only bind: lets the container resolve /dev/serial/by-id/usb-FTDI_*
    # symlinks (Docker doesn't propagate symlinks via `devices:`).
    volumes:
      - /dev/serial:/dev/serial:ro
      - ${HOME}/.config/eg4-battery:/config:ro

    # MQTT credentials override the YAML's mqtt: block when set. Comment out
    # to use the values from eg4-battery.yaml.
    environment:
      - MQTT_HOST=10.0.0.41
      - MQTT_USERNAME=mqtt
      - MQTT_PASSWORD=nutterino

    # Standard log driver — `docker logs` reads from stdout
    logging:
      driver: json-file
      options:
        max-size: "10m"
        max-file: "3"