# Halkyon Train's server beside the instance (ADR 0030, D46), with the BRouter that
# plans its routes (D11, D44). Switched on in .env, with Train's domain and secrets:
#
#   COMPOSE_FILE=compose.yaml:compose.train.yaml
#   TRAIN_DOMAIN=train.halkyon.eu
#
# Train is a member of the instance's register, which Learn's server holds (ADR 0016):
# one account a person, signing in through the register, the shared INSTANCE_SECRET
# on every call between them, which reach each other on the instance's own networks
# alone. Its database is `halkyon_train` in the instance's PostgreSQL, under a role of
# its own that can't connect to Learn's. BRouter has no site and no sign-in: only
# Train's server reaches it, on a network of their own, and asks it nothing that is
# logged. Its segments (Europe's, about 3.3 GB) are in ./brouter/segments, which the
# refresher keeps current monthly, owned by a user ID of their own, which no person,
# no other container and not the CI runner uses. Setting it up: sidecars/README.md.

services:
  train-server:
    build:
      context: ..
      dockerfile: apps/train/halkyon_train_server/Dockerfile
    image: halkyon-train-server
    restart: unless-stopped
    # As Learn's: migrations at every start (redeploy.sh has applied them before).
    command: ["--apply-migrations"]
    environment:
      SERVERPOD_DATABASE_PASSWORD: ${TRAIN_POSTGRES_PASSWORD:?set TRAIN_POSTGRES_PASSWORD in deploy/.env}
      SERVERPOD_PASSWORD_serverSideSessionKeyHashPepper: ${TRAIN_SESSION_KEY_HASH_PEPPER:?set TRAIN_SESSION_KEY_HASH_PEPPER in deploy/.env}
      # The register (ADR 0016): Learn's web server, on the instance's own network,
      # and the secret every call between them carries.
      ACCOUNT_REGISTER_URL: http://server:8082/
      SERVERPOD_PASSWORD_instanceSecret: ${INSTANCE_SECRET:?set INSTANCE_SECRET in deploy/.env}
      # Caddy, as for Learn's server (compose.yaml).
      TRUSTED_PROXIES: 172.30.80.2 fd4a:6c6b:7e80::2
      SOURCE_URL: ${SOURCE_URL:-}
      DATA_LOCATION: ${DATA_LOCATION:-}
      BACKUP_LOCATION: ${BACKUP_LOCATION:-}
      # Routes (D44), from the BRouter below.
      BROUTER_URL: http://brouter:17777/
      # The Loop's firmware through the instance (D40): on unless `off`.
      LOOP_FIRMWARE_RELAY: ${LOOP_FIRMWARE_RELAY:-}
      # The map source (D22); empty: OpenFreeMap.
      MAP_STYLE_URL: ${MAP_STYLE_URL:-}
      MAP_SOURCE_NAME: ${MAP_SOURCE_NAME:-}
      MAP_ATTRIBUTION: ${MAP_ATTRIBUTION:-}
      MAP_ABOUT_URL: ${MAP_ABOUT_URL:-}
    networks:
      - default
      - edge
      - routing
    depends_on:
      postgres:
        condition: service_healthy
    logging:
      driver: journald

  brouter:
    build:
      context: ..
      dockerfile: deploy/brouter/Dockerfile
    image: halkyon-brouter
    restart: unless-stopped
    user: "61177:61177"
    read_only: true
    tmpfs:
      - /tmp:size=16m,uid=61177,gid=61177
    volumes:
      - ./brouter/segments:/segments4:ro
    # Beside Train's server alone: no site, no published port, never beside Caddy or
    # Postgres.
    networks:
      - routing
    mem_limit: 640m
    # No log at all: BRouter writes each route's waypoints to its output, and where
    # people run must never be kept. To look into a failure, switch to journald for
    # a while.
    logging:
      driver: none

  brouter-segments:
    image: halkyon-brouter
    restart: unless-stopped
    user: "61177:61177"
    read_only: true
    command: ["/app/segments.sh"]
    environment:
      # `west,south,east,north` of the segments' south-west corners; Europe's.
      BROUTER_REGION: ${BROUTER_REGION:--25,35,40,70}
    volumes:
      - ./brouter/segments:/segments4
    # Out to brouter.de on `downloads`, an ordinary bridge with a way out to anywhere,
    # shared with the map's and the search's downloads where their compose files are on.
    networks:
      - downloads
    mem_limit: 64m
    logging:
      driver: journald

  caddy:
    environment:
      TRAIN_DOMAIN: ${TRAIN_DOMAIN:?set TRAIN_DOMAIN in deploy/.env}
    volumes:
      - ./sidecars/train.caddy:/etc/caddy/sidecars/train.caddy:ro

  server:
    environment:
      # Train's web server, told when an account goes (ADR 0016); set
      # INSTANCE_MEMBERS in .env to name more members, Train's among them.
      INSTANCE_MEMBERS: ${INSTANCE_MEMBERS:-http://train-server:8082/}

networks:
  # Train's server and BRouter, without a way out.
  routing:
    internal: true
  downloads: