# HR-ATS-Portal — every service and every image, in one file.
#
#   docker compose build            # hrms-backend / hrms-ats-engine / hrms-frontend
#   docker compose up -d
#   docker compose ps
#   docker compose logs -f backend-api
#
# ── Postgres ──────────────────────────────────────────────────────────────────────
# The `postgres` service at the bottom is behind a compose PROFILE, so it is defined
# and buildable here but never starts with a plain `docker compose up`. The stack
# talks to the PostgreSQL server already running on the host, via
# DB_HOST=host.docker.internal (backend/.env says localhost — correct for a host
# process, wrong inside a container).
#
# Host Postgres must accept connections from the Docker bridge: listen_addresses = '*'
# in postgresql.conf and a pg_hba.conf line for 172.16.0.0/12 (or the specific subnet).
#
# To build/run the containerised database instead, see the comments on that service.
#
# ── Ports ─────────────────────────────────────────────────────────────────────────
# Stop a host `uvicorn` (8000) and `npm run dev` (5173) before starting these, or
# override with BACKEND_PORT / FRONTEND_PORT / ATS_PORT. Windows lets a host process
# bind 127.0.0.1:8000 while Docker binds 0.0.0.0:8000, and `localhost` resolves to ::1
# first — both listen, and requests reach whichever won.
#
# ── Overlay ───────────────────────────────────────────────────────────────────────
# docker-compose.dev.yml adds live source mounts and --reload on top of this file. It
# defines no services or images of its own; it only overrides the ones here:
#   docker compose -f docker-compose.yml -f docker-compose.dev.yml up

x-backend-build: &backend-build
  # Root context, not ./backend: backend/job/candidate imports the bulk-ats engine
  # from app/, which sits outside the backend folder. See backend/Dockerfile.
  context: .
  dockerfile: backend/Dockerfile

x-backend-env: &backend-env
  PYTHONPATH: /app
  # backend/.env is written for host processes; these are the values a container needs.
  #
  # DB_HOST defaults to the LOCAL Postgres server on the host. Set DB_HOST=postgres in
  # the shell (or a root .env) to point the whole stack at the container below instead
  # — that is the only value that has to change, since services reach it over the
  # compose network on 5432, not the published host port.
  DB_HOST: ${DB_HOST:-host.docker.internal}
  REDIS_URL: redis://redis:6379/0
  EMAIL_URL: http://host.docker.internal:5000
  BACKEND_URL: http://backend-api:8000

# The one shared folder. Every process that decodes, scores or serves a CV reads and
# writes the same host directory, so a file written by the API is the same file the
# worker opens. Absolute paths stored in the DB match across services because the
# mount target is identical everywhere; inbox.plugins.resolve_attachment_path also
# falls back to basename-under-this-directory for rows written by a host process.
x-attachments: &attachments
  - ${ATTACHMENTS_DIR:-./backend/inbox/decoded_attachments}:/app/inbox/decoded_attachments

x-backend-service: &backend-service
  build: *backend-build
  image: hrms-backend:local
  working_dir: /app
  env_file:
    - ./backend/.env
  environment: *backend-env
  extra_hosts:
    - "host.docker.internal:host-gateway"
  depends_on:
    redis:
      condition: service_healthy
    # required:false — the default stack uses the host's Postgres and never starts
    # this one, and that must not be an error. When the profile IS active, startup
    # waits for it to pass pg_isready.
    postgres:
      condition: service_healthy
      required: false
  restart: unless-stopped

services:
  # --- Redis (broker + result backend for taskiq) ----------------------------------
  redis:
    image: redis:7-alpine
    container_name: hrms-redis
    command: ["redis-server", "--appendonly", "yes"]
    ports:
      - "${REDIS_PORT:-6379}:6379"
    volumes:
      - redis-data:/data
    healthcheck:
      test: ["CMD", "redis-cli", "ping"]
      interval: 10s
      timeout: 5s
      retries: 5
    restart: unless-stopped

  # --- portal API ------------------------------------------------------------------
  backend-api:
    <<: *backend-service
    container_name: hrms-backend-api
    command: ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]
    ports:
      - "${BACKEND_PORT:-8000}:8000"
    volumes: *attachments
    healthcheck:
      # python:slim has no curl and the API exposes no /health route, so this is a
      # plain TCP check against the uvicorn socket.
      test:
        [
          "CMD",
          "python",
          "-c",
          "import socket;socket.create_connection(('127.0.0.1',8000),3).close()",
        ]
      interval: 15s
      timeout: 5s
      retries: 5
      start_period: 40s

  # --- bulk ATS scoring engine (standalone service form of app/) --------------------
  ats-engine:
    build:
      context: .
      dockerfile: app/Dockerfile
    image: hrms-ats-engine:local
    container_name: hrms-ats-engine
    env_file:
      # OPENAI_API_KEY currently lives in backend/.env; a root .env (see .env.example)
      # overrides it when present, and the stack still comes up when it is not.
      - ./backend/.env
      - path: ./.env
        required: false
    ports:
      - "${ATS_PORT:-8100}:8100"
    healthcheck:
      test:
        [
          "CMD",
          "python",
          "-c",
          "import urllib.request;urllib.request.urlopen('http://127.0.0.1:8100/api/v1/health',timeout=3)",
        ]
      interval: 15s
      timeout: 5s
      retries: 5
      start_period: 20s
    restart: unless-stopped

  # --- React portal -----------------------------------------------------------------
  frontend:
    build:
      context: ./frontend
      args:
        # Baked into the bundle at build time — change it and rebuild, not restart.
        VITE_API_BASE: ${VITE_API_BASE:-http://localhost:8000}
    image: hrms-frontend:local
    container_name: hrms-frontend
    ports:
      - "${FRONTEND_PORT:-5173}:80"
    healthcheck:
      test: ["CMD", "wget", "-q", "--spider", "http://127.0.0.1/"]
      interval: 15s
      timeout: 5s
      retries: 5
    restart: unless-stopped

  # --- background processing (same image as backend-api, different command) ---------
  taskiq-worker:
    <<: *backend-service
    container_name: hrms-taskiq-worker
    command:
      [
        "taskiq",
        "worker",
        "taskiq_management.broker_setup:broker",
        "inbox.tasks",
        "inbox.sync_tasks",
        "taskiq_management.tasks",
        "--workers",
        "1",
      ]
    environment:
      <<: *backend-env
      TASKIQ_QUEUE_NAME: inbox
      TASKIQ_WORKER_NAME: worker-01
    volumes: *attachments

  taskiq-scheduler:
    <<: *backend-service
    container_name: hrms-taskiq-scheduler
    command:
      [
        "taskiq",
        "scheduler",
        "taskiq_management.broker_setup:scheduler",
        "inbox.sync_tasks",
      ]
    environment:
      <<: *backend-env
      TASKIQ_QUEUE_NAME: inbox

  taskiq-cv-worker:
    <<: *backend-service
    container_name: hrms-taskiq-cv-worker
    command:
      [
        "taskiq",
        "worker",
        "taskiq_management.cv_broker_setup:cv_broker",
        "inbox.cv_tasks",
        "--workers",
        "1",
      ]
    environment:
      <<: *backend-env
      TASKIQ_CV_QUEUE_NAME: cv_upload
      TASKIQ_WORKER_NAME: cv-worker-01
    volumes: *attachments

  taskiq-cv-scheduler:
    <<: *backend-service
    container_name: hrms-taskiq-cv-scheduler
    command:
      [
        "taskiq",
        "scheduler",
        "taskiq_management.cv_broker_setup:cv_scheduler",
        "inbox.cv_tasks",
      ]
    environment:
      <<: *backend-env
      TASKIQ_CV_QUEUE_NAME: cv_upload

  # --- Postgres: DEFINED HERE, NOT STARTED BY DEFAULT -------------------------------
  # The profile is what keeps it out of `docker compose build` and `docker compose up`.
  # Nothing about the default stack changes by its presence in this file.
  #
  #   docker compose --profile postgres build postgres     # build the image
  #   docker compose --profile postgres up -d postgres     # run it, host port 5433
  #
  # Pointing the app at it is a separate, deliberate step — set DB_HOST=postgres (see
  # x-backend-env) and recreate the services. The volume starts empty, so Alembic
  # rebuilds the schema on first boot; it does not share the host server's data.
  postgres:
    profiles: ["postgres"]
    build:
      context: ./docker/postgres
    image: hrms-postgres:local
    container_name: hrms-postgres
    environment:
      # Interpolated from the shell or a root .env, NOT from backend/.env — compose
      # variable substitution and container environment are different things.
      # Defaults match backend/.env.example.
      POSTGRES_USER: ${DB_USERNAME:-postgres}
      POSTGRES_PASSWORD: ${DB_PASSWORD:-postgres}
      POSTGRES_DB: ${DB_NAME:-hrms}
      POSTGRES_INITDB_ARGS: "--encoding=UTF8"
    ports:
      # 5433: the host's own Postgres server owns 5432. Only for host-side tools —
      # containers reach this one on 5432 over the compose network.
      - "${POSTGRES_PORT:-5433}:5432"
    volumes:
      - postgres-data:/var/lib/postgresql/data
    healthcheck:
      test:
        ["CMD-SHELL", "pg_isready -U ${DB_USERNAME:-postgres} -d ${DB_NAME:-hrms}"]
      interval: 10s
      timeout: 5s
      retries: 5
      start_period: 20s
    restart: unless-stopped

volumes:
  redis-data:
  postgres-data: