services:
  # MinIO - our local data lake storage (S3-compatible)
  minio:
    image: minio/minio:latest
    ports:
      - "9000:9000"   # API port
      - "9001:9001"   # Web console
    environment:
      MINIO_ROOT_USER: minioadmin
      MINIO_ROOT_PASSWORD: minioadmin123
    command: server /data --console-address ":9001"
    volumes:
      - minio_data:/data
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost:9000/minio/health/live"]
      interval: 30s
      timeout: 10s
      retries: 3

  # MinIO init — creates the required buckets on first startup
  minio-init:
    image: minio/minio:latest
    depends_on:
      minio:
        condition: service_healthy
    entrypoint: /bin/sh
    command:
      - -c
      - |
        mc alias set local http://minio:9000 minioadmin minioadmin123 &&
        mc mb --ignore-existing local/healthcare &&
        mc mb --ignore-existing local/healthcare-checkpoints &&
        echo "Buckets ready."

  # Kafka + Zookeeper - for streaming vital signs
  zookeeper:
    image: confluentinc/cp-zookeeper:7.4.0
    environment:
      ZOOKEEPER_CLIENT_PORT: 2181
      ZOOKEEPER_TICK_TIME: 2000

  kafka:
    image: confluentinc/cp-kafka:7.4.0
    depends_on: [zookeeper]
    ports:
      - "9092:9092"
    environment:
      KAFKA_BROKER_ID: 1
      KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://localhost:9092
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
      KAFKA_AUTO_CREATE_TOPICS_ENABLE: "true"
    healthcheck:
      test: ["CMD", "kafka-topics", "--bootstrap-server", "localhost:9092", "--list"]
      interval: 30s
      timeout: 10s
      retries: 5

  # PostgreSQL - metadata store for Airflow + data warehouse for dbt Gold layer
  postgres:
    image: postgres:15
    ports:
      - "5432:5432"
    environment:
      POSTGRES_USER: airflow
      POSTGRES_PASSWORD: airflow
      POSTGRES_DB: airflow
    volumes:
      - postgres_data:/var/lib/postgresql/data
      - ./scripts/init_db.sql:/docker-entrypoint-initdb.d/init_db.sql
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U airflow"]
      interval: 10s
      timeout: 5s
      retries: 5

  # Airflow - pipeline orchestration
  airflow-init:
    image: apache/airflow:2.8.0
    depends_on:
      postgres:
        condition: service_healthy
    environment:
      AIRFLOW__CORE__EXECUTOR: LocalExecutor
      AIRFLOW__DATABASE__SQL_ALCHEMY_CONN: postgresql+psycopg2://airflow:airflow@postgres/airflow
      AIRFLOW__CORE__LOAD_EXAMPLES: 'false'
      AIRFLOW__CORE__FERNET_KEY: 'ZmDfcTF7_60GrrY167zsiPd67pEvs0aGOv2oasOM1Pg='
    entrypoint: /bin/bash
    command:
      - -c
      - |
        airflow db migrate &&
        airflow users create \
          --username admin \
          --password admin \
          --firstname Admin \
          --lastname User \
          --role Admin \
          --email admin@example.com

  airflow-webserver:
    image: apache/airflow:2.8.0
    depends_on:
      postgres:
        condition: service_healthy
      airflow-init:
        condition: service_completed_successfully
    ports:
      - "8080:8080"
    environment:
      AIRFLOW__CORE__EXECUTOR: LocalExecutor
      AIRFLOW__DATABASE__SQL_ALCHEMY_CONN: postgresql+psycopg2://airflow:airflow@postgres/airflow
      AIRFLOW__CORE__LOAD_EXAMPLES: 'false'
      AIRFLOW__CORE__FERNET_KEY: 'ZmDfcTF7_60GrrY167zsiPd67pEvs0aGOv2oasOM1Pg='
    volumes:
      - ./dags:/opt/airflow/dags
      - ./spark_jobs:/opt/airflow/spark_jobs
      - ./data:/opt/airflow/data
    command: webserver
    healthcheck:
      test: ["CMD", "curl", "--fail", "http://localhost:8080/health"]
      interval: 30s
      timeout: 10s
      retries: 5

  airflow-scheduler:
    image: apache/airflow:2.8.0
    depends_on:
      postgres:
        condition: service_healthy
      airflow-init:
        condition: service_completed_successfully
    environment:
      AIRFLOW__CORE__EXECUTOR: LocalExecutor
      AIRFLOW__DATABASE__SQL_ALCHEMY_CONN: postgresql+psycopg2://airflow:airflow@postgres/airflow
      AIRFLOW__CORE__LOAD_EXAMPLES: 'false'
      AIRFLOW__CORE__FERNET_KEY: 'ZmDfcTF7_60GrrY167zsiPd67pEvs0aGOv2oasOM1Pg='
    volumes:
      - ./dags:/opt/airflow/dags
      - ./spark_jobs:/opt/airflow/spark_jobs
      - ./data:/opt/airflow/data
    command: scheduler

  # R Shiny Dashboard - serves the analytics dashboard on port 3838
  # Access at: http://localhost:3838/healthcare
  shiny-dashboard:
    build:
      context: ./shiny_app
      dockerfile: Dockerfile.shiny
    platform: linux/amd64   # Rosetta 2 emulation on Apple Silicon (M1/M2/M3)
    ports:
      - "3838:3838"
    volumes:
      # Mount Gold-layer CSVs + audit log read-only into the container
      - ./data/output:/data/output:ro
    environment:
      HEALTHCARE_DATA_PATH: /data/output
    restart: unless-stopped
    # No dependencies — runs standalone, reads local CSV files directly

volumes:
  minio_data:
  postgres_data: