# Pinned image versions — bump in lockstep with docker/*.Dockerfile.
#   MONGO = 7.0.15
# Requires Docker Engine >= 24.0 and Docker Compose >= 2.20 (Compose Spec).
# The legacy top-level `version:` key is intentionally omitted (deprecated in Compose v2).

services:
  # One-shot init: writes ${TVAPP2_CONFIG_DIR}/config.json from the MONGO_ROOT_USER /
  # MONGO_ROOT_PASS values in .env. The JSON template is embedded below — NO host file is
  # bind-mounted — so a deployment host needs only this compose file + .env, nothing else to
  # ship. (Bind-mounting a host template is a footgun: if the file is missing Docker silently
  # creates it as an empty *directory*, and config.json ends up empty.) Left untouched if an
  # existing config.json already targets the compose "mongo" host; regenerated otherwise
  # (e.g. a stale @127.0.0.1: config left by an all-in-one run).
  config-init:
    image: alpine:3.20
    environment:
      MONGO_ROOT_USER: ${MONGO_ROOT_USER}
      MONGO_ROOT_PASS: ${MONGO_ROOT_PASS}
    volumes:
      - ${TVAPP2_CONFIG_DIR}:/out
    command:
      - sh
      - -c
      - |
        set -eu
        if [ -s /out/config.json ] && grep -q '@mongo:' /out/config.json; then
          echo "[config-init] /out/config.json already targets @mongo: — leaving alone"
          exit 0
        fi
        if [ -s /out/config.json ]; then
          echo "[config-init] /out/config.json does not target @mongo: — regenerating"
        fi
        printf '{\n  "mongoUri": "mongodb://%s:%s@mongo:27017/tvapp2?authSource=admin",\n  "port": 3000,\n  "logLevel": "info"\n}\n' \
          "$$MONGO_ROOT_USER" "$$MONGO_ROOT_PASS" > /out/config.json
        echo "[config-init] wrote /out/config.json"
    restart: "no"

  app:
    image: iflip721/tvapp2-app-stack:2.0.5-dev
    build:
      context: .
      dockerfile: docker/app.Dockerfile
    ports:
      - "3000:3000"
    volumes:
      # config.json is generated by the config-init service from .env (embedded template).
      # Set TVAPP2_CONFIG_DIR in .env to the host directory that holds it.
      - ${TVAPP2_CONFIG_DIR}:/etc/tvapp2:rw
    depends_on:
      config-init:
        condition: service_completed_successfully
      mongo:
        condition: service_healthy
    networks: [tvnet]
    restart: unless-stopped

  mongo:
    image: mongo:7.0.15
    environment:
      MONGO_INITDB_ROOT_USERNAME: ${MONGO_ROOT_USER}
      MONGO_INITDB_ROOT_PASSWORD: ${MONGO_ROOT_PASS}
    ports:
      # Expose mongod on the host. Override the host-side port with
      # MONGO_HOST_PORT in .env (defaults to 27017).
      - "${MONGO_HOST_PORT:-27017}:27017"
    volumes:
      # Persistent MongoDB data. Set MONGO_DATA_PATH in .env to an absolute
      # host path (e.g. /srv/tvapp2/mongo) for a bind mount; leave unset to
      # use the named volume defined below.
      - ${MONGO_DATA_PATH:-mongo-data}:/data/db
    healthcheck:
      test: ["CMD", "mongosh", "--quiet", "--eval", "db.adminCommand('ping').ok"]
      interval: 10s
      timeout: 5s
      retries: 5
    networks: [tvnet]
    restart: unless-stopped

volumes:
  # Fallback named volume — used only when MONGO_DATA_PATH is unset.
  mongo-data:

networks:
  tvnet: