version: '3.8'

services:
  # Generates machine secrets (JWT/DB/Redis) on first run when they aren't set
  # in .env, so a fresh install needs zero secret management. Each file is seeded
  # from the matching env var when provided (backward-compatible), otherwise a
  # strong random value. Idempotent — never overwrites an existing file, so the
  # DB password can't drift out from under an already-initialised Postgres volume.
  secrets-init:
    image: alpine:3.20
    container_name: picpeak-secrets-init
    env_file: .env
    entrypoint:
      - sh
      - -c
      - |
        set -e
        mkdir -p /run/secrets
        if [ ! -s /run/secrets/jwt_secret ]; then
          if [ -n "$$JWT_SECRET" ]; then printf '%s' "$$JWT_SECRET" > /run/secrets/jwt_secret;
          else tr -dc A-Za-z0-9 < /dev/urandom | head -c 48 > /run/secrets/jwt_secret; fi
        fi
        if [ ! -s /run/secrets/db_password ]; then
          if [ -n "$$DB_PASSWORD" ]; then printf '%s' "$$DB_PASSWORD" > /run/secrets/db_password;
          else tr -dc A-Za-z0-9 < /dev/urandom | head -c 48 > /run/secrets/db_password; fi
        fi
        if [ ! -s /run/secrets/redis_password ]; then
          if [ -n "$$REDIS_PASSWORD" ]; then printf '%s' "$$REDIS_PASSWORD" > /run/secrets/redis_password;
          else tr -dc A-Za-z0-9 < /dev/urandom | head -c 48 > /run/secrets/redis_password; fi
        fi
        # 644: the readers run as three different users (postgres, redis, nodejs),
        # so a non-root reader must be able to read them. The volume is private to
        # these containers and never host-exposed.
        chmod 644 /run/secrets/jwt_secret /run/secrets/db_password /run/secrets/redis_password
    volumes:
      - picpeak-secrets:/run/secrets
    restart: "no"

  postgres:
    image: postgres:15-alpine
    container_name: picpeak-postgres
    userns_mode: "host"
    environment:
      POSTGRES_USER: ${DB_USER:-picpeak}
      # Reads the generated (or .env-seeded) password from the shared secrets volume.
      POSTGRES_PASSWORD_FILE: /run/secrets/db_password
      POSTGRES_DB: ${DB_NAME:-picpeak}
    volumes:
      - postgres-data:/var/lib/postgresql/data
      - picpeak-secrets:/run/secrets:ro
    depends_on:
      secrets-init:
        condition: service_completed_successfully
    networks:
      - picpeak-network
    restart: unless-stopped
    healthcheck:
      # `pg_isready -U <user>` without -d defaults to probing a database
      # whose name matches the user — postgres then logs constant
      # `FATAL: database "picpeak" does not exist` even though the
      # actual DB is `picpeak_prod`. Pinning -d to DB_NAME makes the
      # probe hit the real database and silences the log noise that
      # made #484's reporter think the install was broken.
      test: ["CMD-SHELL", "pg_isready -U ${DB_USER:-picpeak} -d ${DB_NAME:-picpeak}"]
      interval: 10s
      timeout: 5s
      retries: 5

  redis:
    image: redis:7-alpine
    container_name: picpeak-redis
    userns_mode: "host"
    # Reads the generated (or .env-seeded) password from the shared secrets volume.
    command: sh -c 'exec redis-server --requirepass "$$(cat /run/secrets/redis_password)"'
    volumes:
      - redis-data:/data
      - picpeak-secrets:/run/secrets:ro
    depends_on:
      secrets-init:
        condition: service_completed_successfully
    networks:
      - picpeak-network
    restart: unless-stopped
    healthcheck:
      test: ["CMD", "redis-cli", "--raw", "incr", "ping"]
      interval: 10s
      timeout: 5s
      retries: 5

  backend:
    # Use pre-built image from GitHub Container Registry
    # PICPEAK_CHANNEL: 'stable' (default), 'beta', or specific version like 'v2.3.0'
    image: ghcr.io/picpeak/picpeak/backend:${PICPEAK_CHANNEL:-stable}
    container_name: picpeak-backend
    env_file: .env
    environment:
      - NODE_ENV=production
      - DB_HOST=${DB_HOST:-postgres}
      - REDIS_HOST=redis
      - STORAGE_PATH=/app/storage
      - PHOTOS_DIR=/app/storage/events
      - PICPEAK_RELEASE_CHANNEL=${PICPEAK_CHANNEL:-stable}
      # Watch-folder auto-import: max photos processed in parallel (default 2).
      - FILE_WATCHER_CONCURRENCY=${FILE_WATCHER_CONCURRENCY:-2}
      # External-media folder watcher (issue 1187); all optional, see .env.example.
      - EXTERNAL_MEDIA_WATCH=${EXTERNAL_MEDIA_WATCH:-true}
      - EXTERNAL_MEDIA_WATCH_POLLING=${EXTERNAL_MEDIA_WATCH_POLLING:-false}
      - EXTERNAL_MEDIA_WATCH_POLL_INTERVAL_MS=${EXTERNAL_MEDIA_WATCH_POLL_INTERVAL_MS:-5000}
      - EXTERNAL_MEDIA_WATCH_SWEEP_INTERVAL_MS=${EXTERNAL_MEDIA_WATCH_SWEEP_INTERVAL_MS:-900000}
      - EXTERNAL_MEDIA_WATCH_DEBOUNCE_MS=${EXTERNAL_MEDIA_WATCH_DEBOUNCE_MS:-10000}
      - EXTERNAL_MEDIA_WATCH_STABILITY_MS=${EXTERNAL_MEDIA_WATCH_STABILITY_MS:-5000}
      # Face recognition (#1074). Defaults to the sidecar's compose service
      # name; nothing touches it until the `faces` feature flag is enabled in
      # admin settings, so installs without the picpeak-ml container are
      # unaffected. Start the sidecar with `--profile faces`.
      - FACE_ML_URL=${FACE_ML_URL:-http://picpeak-ml:8000}
      - FACE_ML_TOKEN=${FACE_ML_TOKEN:-}
      - FACE_PROCESSOR_CONCURRENCY=${FACE_PROCESSOR_CONCURRENCY:-}
    volumes:
      # Defaulted so a .env that simply does not set these still works. Without
      # them compose aborts with "invalid spec: :/app/storage: empty section
      # between colons", which reads like a broken compose file rather than a
      # missing variable (#705).
      #
      # Note this does NOT make `config` work with no .env at all: `env_file`
      # above still requires the file. Making it optional needs
      # `required: false`, which is Compose 2.24+ syntax that OLDER Compose
      # rejects as a schema error — taking the whole stack down rather than
      # just losing a default. Not worth it for a case the onboarding flow
      # never hits, since it copies .env.example first.
      - ${APP_STORAGE:-./storage}:/app/storage
      - ${LOGS:-./logs}:/app/logs
      - ${APP_DATA:-./data}:/app/data
      - picpeak-secrets:/run/secrets:ro
    ports:
      - "${BACKEND_PORT:-3001}:3000"
    networks:
      - picpeak-network
    depends_on:
      secrets-init:
        condition: service_completed_successfully
      postgres:
        condition: service_healthy
      redis:
        condition: service_healthy
    restart: unless-stopped
    # Memory cap (optional, recommended on shared / multi-tenant hosts):
    # uncomment to bound the backend's RSS. Sharp/libvips decodes the full
    # uncompressed image before resize, so a multi-photo upload batch can
    # spike memory. With a cap set, the kernel OOM-killer takes the
    # container instead of the whole host; restart:unless-stopped brings
    # it back. Match this to the RAM budget you've allocated for picpeak
    # (`docker stats` shows the live usage).
    # mem_limit: 3g
    # memswap_limit: 3g
    healthcheck:
      # Backend exposes /health on internal port 3000.
      # The backend image only ships wget (Alpine base) — using curl
      # here makes `docker ps` show the container as `unhealthy`
      # indefinitely even when /health responds. Mirrors the wget-based
      # HEALTHCHECK already declared in backend/Dockerfile so docker
      # compose, plain `docker run`, and `docker ps` all agree.
      test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost:3000/health"]
      interval: 30s
      timeout: 10s
      retries: 3

  # Optional face-detection sidecar (#1074). Gated behind the `faces` profile:
  # `docker compose --profile faces up -d`. Nothing depends on it, and the
  # backend never calls it while the `faces` feature flag is off.
  #
  # The service name is `picpeak-ml` because it doubles as the hostname in
  # FACE_ML_URL's default. Renaming it breaks that default for every install
  # that never set the variable.
  picpeak-ml:
    image: ghcr.io/picpeak/picpeak/ml:${PICPEAK_CHANNEL:-stable}
    container_name: picpeak-ml
    profiles:
      - faces
    environment:
      # The container refuses to start without this rather than serving
      # anonymously — it must match the backend's FACE_ML_TOKEN.
      - FACE_ML_TOKEN=${FACE_ML_TOKEN:-}
      - FACE_ORT_THREADS=${FACE_ORT_THREADS:-1}
      - TZ=${TZ:-UTC}
    # No volumes and no published ports: stateless, and reachable only from
    # the backend on picpeak-network.
    networks:
      - picpeak-network
    restart: unless-stopped
    healthcheck:
      test: ["CMD", "python", "-c", "import urllib.request,sys; sys.exit(0 if urllib.request.urlopen('http://127.0.0.1:8000/health', timeout=4).status == 200 else 1)"]
      interval: 30s
      timeout: 10s
      retries: 3
      start_period: 40s

  frontend:
    # Use pre-built image from GitHub Container Registry
    # Uses same channel as backend for consistency
    image: ghcr.io/picpeak/picpeak/frontend:${PICPEAK_CHANNEL:-stable}
    container_name: picpeak-frontend
    # Note: Pre-built frontend uses Nginx to proxy /api to backend:3000.
    # Prefer keeping API base as '/api' in builds to avoid CORS.
    environment:
      # Substituted into index.html at container start (see frontend/
      # docker-entrypoint.sh) so social link previews reaching the
      # static SPA shell (WhatsApp Business API, Twilio, LinkPreview,
      # etc. — see #521) show the configured brand instead of the
      # generic "PicPeak" default. Defaults applied when unset; restart
      # the frontend container after changing for the new title to
      # take effect.
      - BRAND_TITLE=${BRAND_TITLE:-PicPeak}
      - BRAND_DESCRIPTION=${BRAND_DESCRIPTION:-Photo gallery shared with PicPeak.}
    ports:
      - "${FRONTEND_PORT:-3000}:80"
    networks:
      - picpeak-network
    depends_on:
      - backend
    restart: unless-stopped
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost/health"]
      interval: 30s
      timeout: 10s
      retries: 3

  # Optional: Nginx reverse proxy for production with SSL
  # Uncomment and configure if you want built-in HTTPS support
  # nginx:
  #   image: nginx:alpine
  #   container_name: picpeak-nginx
  #   ports:
  #     - "80:80"
  #     - "443:443"
  #   volumes:
  #     - ./nginx/nginx.conf:/etc/nginx/nginx.conf:ro
  #     - ./nginx/ssl:/etc/nginx/ssl:ro
  #     - ./nginx/conf.d:/etc/nginx/conf.d:ro
  #   networks:
  #     - picpeak-network
  #   depends_on:
  #     - frontend
  #     - backend
  #   restart: unless-stopped

volumes:
  postgres-data:
    driver: local
  redis-data:
    driver: local
  # Holds the auto-generated machine secrets (jwt_secret, db_password,
  # redis_password). Keep it — deleting it orphans the DB password from the
  # Postgres volume. Back it up alongside postgres-data.
  picpeak-secrets:
    driver: local

networks:
  picpeak-network:
    driver: bridge