version: "3.9"

# ThreeGate infrastructure skeleton
#
# Notes:
# - This compose file is intentionally conservative and minimal.
# - Images are placeholders; pin by digest in production.
# - Network isolation is part of the security model; do not “simplify” it away.
# - Egress must be enforced both here (networks) and on the host (DOCKER-USER chain).

name: threegate

services:
  # ------------------------------------------------------------
  # CORE: analysis & writing (NO INTERNET)
  # ------------------------------------------------------------
  core:
    image: threegate/core:0.1
    container_name: threegate-core
    networks:
      - llmnet
    environment:
      - THREEGATE_ROLE=core
      - NO_PROXY=*
    volumes:
      # Policy is always read-only
      - ../policy:/srv/threegate/policy:ro
      # CORE workspace
      - ./volumes/core-workspace:/srv/threegate/core/workspace
      # One-way inbound: validated packets/results only (mounted ro into CORE)
      - ./volumes/handoff/inbound-to-core:/srv/threegate/handoff/inbound-to-core:ro
      # Optional outbound request drafts (CORE -> human -> fetch/tool-exec)
      - ./volumes/handoff/inbound-to-fetch:/srv/threegate/handoff/inbound-to-fetch
      - ./volumes/tool-exec/requests_in:/srv/threegate/tool-exec/requests_in
      # Optional manual PDF lane (read-only)
      - ./volumes/dropbox/pdfs_in:/srv/threegate/dropbox/pdfs_in:ro
    read_only: true
    tmpfs:
      - /tmp
    security_opt:
      - no-new-privileges:true
    cap_drop:
      - ALL
    restart: unless-stopped
    depends_on:
      - rolemesh

  # ------------------------------------------------------------
  # FETCH: controlled retrieval (INTERNET ONLY VIA PROXY)
  # ------------------------------------------------------------
  fetch:
    image: threegate/fetch:0.1
    container_name: threegate-fetch
    networks:
      - llmnet
      - fetchnet
    environment:
      - THREEGATE_ROLE=fetch
      # Proxy is the only intended egress. Keep both set.
      - http_proxy=http://proxy:3128
      - https_proxy=http://proxy:3128
      - HTTP_PROXY=http://proxy:3128
      - HTTPS_PROXY=http://proxy:3128
      - NO_PROXY=localhost,127.0.0.1,rolemesh,core
    volumes:
      - ../policy:/srv/threegate/policy:ro
      - ./volumes/fetch-workspace:/srv/threegate/fetch/workspace
      # FETCH writes packets here; validator moves accepted packets to inbound-to-core
      - ./volumes/handoff/inbound-to-core:/srv/threegate/handoff/inbound-to-core
      - ./volumes/handoff/quarantine:/srv/threegate/handoff/quarantine
      - ./volumes/handoff/inbound-to-fetch:/srv/threegate/handoff/inbound-to-fetch:ro
      - ./volumes/tools:/srv/threegate/tools:ro
    read_only: true
    tmpfs:
      - /tmp
    security_opt:
      - no-new-privileges:true
    cap_drop:
      - ALL
    restart: unless-stopped
    depends_on:
      - proxy
      - rolemesh

  # ------------------------------------------------------------
  # TOOL-EXEC: execution sandbox coordinator (ERA-backed)
  # Note: This service does NOT need network by default.
  # It orchestrates ERA runs and writes tool results to inbound-to-core.
  # ------------------------------------------------------------
  tool-exec:
    image: threegate/tool-exec:0.1
    container_name: threegate-tool-exec
    networks:
      - llmnet
    environment:
      - THREEGATE_ROLE=tool-exec
      - ERA_BACKEND=ERA
      # Default: forbid guest volumes unless explicitly enabled by operator policy
      - AGENT_ENABLE_GUEST_VOLUMES=0
      - NO_PROXY=*
    volumes:
      - ../policy:/srv/threegate/policy:ro
      - ./volumes/tool-exec/requests_in:/srv/threegate/tool-exec/requests_in:ro
      - ./volumes/tool-exec/results_out:/srv/threegate/tool-exec/results_out
      - ./volumes/handoff/inbound-to-core:/srv/threegate/handoff/inbound-to-core
      - ./volumes/handoff/quarantine:/srv/threegate/handoff/quarantine
      - ./volumes/tools:/srv/threegate/tools:ro
      # ERA integration will usually require host resources (e.g., /dev/kvm)
      # Keep this commented until you implement TOOL-EXEC runner and review risks.
      # - /dev/kvm:/dev/kvm
    read_only: true
    tmpfs:
      - /tmp
    security_opt:
      - no-new-privileges:true
    cap_drop:
      - ALL
    restart: unless-stopped
    depends_on:
      - rolemesh

  # ------------------------------------------------------------
  # PROXY: managed egress (sole internet exit for FETCH)
  # ------------------------------------------------------------
  proxy:
    image: docker.io/library/squid:6
    container_name: threegate-proxy
    networks:
      - fetchnet
      - egressnet
    volumes:
      - ./infra/proxy/squid.conf:/etc/squid/squid.conf:ro
      - ./volumes/proxy-cache:/var/spool/squid
    ports:
      # Expose to host only if you need to debug; otherwise keep internal-only.
      # - "3128:3128"
    restart: unless-stopped

  # ------------------------------------------------------------
  # LLM Gateway: local / proxied LLM access (OpenAI-compatible)
  # Placeholder for RoleMesh-Gateway; replace with your actual gateway image/config.
  # ------------------------------------------------------------
  rolemesh:
    image: threegate/rolemesh-gateway:0.1
    container_name: threegate-rolemesh
    networks:
      - llmnet
    environment:
      - THREEGATE_ROLE=llm-gateway
    # Typically you will expose this only to other containers on llmnet.
    # ports:
    #   - "8080:8080"
    read_only: true
    tmpfs:
      - /tmp
    security_opt:
      - no-new-privileges:true
    cap_drop:
      - ALL
    restart: unless-stopped

networks:
  # Internal network: CORE/FETCH/TOOL-EXEC + gateway only
  llmnet:
    driver: bridge
    internal: true

  # Internal network between FETCH and proxy
  fetchnet:
    driver: bridge
    internal: true

  # Egress network for proxy only
  egressnet:
    driver: bridge
    internal: false