services:
  # ==========================================
  # Message Broker: Redpanda (Kafka-compatible)
  # ==========================================
  redpanda:
    image: docker.redpanda.com/redpandadata/redpanda:v24.1.8
    container_name: redpanda
    command:
      - redpanda start
      - --smp 1
      - --memory 1G
      - --reserve-memory 0M
      - --overprovisioned
      - --node-id 0
      - --check=false
      - --kafka-addr PLAINTEXT://0.0.0.0:29092,OUTSIDE://0.0.0.0:9092
      - --advertise-kafka-addr PLAINTEXT://redpanda:29092,OUTSIDE://localhost:9092
    ports:
      - "9092:9092"
      - "9644:9644"
    healthcheck:
      test: ["CMD-SHELL", "rpk cluster health --brokers=localhost:9092 | grep -q 'Healthy:.*true' || exit 1"]
      interval: 5s
      timeout: 5s
      retries: 12
      start_period: 10s

  # Automated topic provisioner ensuring exact partitions & compression
  topic-init:
    image: docker.redpanda.com/redpandadata/redpanda:v24.1.8
    container_name: redpanda-topic-init
    depends_on:
      redpanda:
        condition: service_healthy
    entrypoint: /bin/sh
    command:
      - -c
      - |
        rpk topic create cdr.raw -p 3 -r 1 -c compression.type=lz4 -c retention.ms=86400000 --brokers=redpanda:29092 || true
        rpk topic create cdr.raw.dlq -p 1 -r 1 -c retention.ms=604800000 --brokers=redpanda:29092 || true
    restart: "no"

  # ==========================================
  # Analytics Database: ClickHouse
  # ==========================================
  clickhouse:
    image: clickhouse/clickhouse-server:24.3-alpine
    container_name: clickhouse
    ports:
      - "8123:8123"
      - "9000:9000"
    environment:
      CLICKHOUSE_DB: telecom
      CLICKHOUSE_USER: default
      CLICKHOUSE_DEFAULT_ACCESS_MANAGEMENT: 1
    volumes:
      - ./docker/clickhouse/init.sql:/docker-entrypoint-initdb.d/init.sql:ro
    healthcheck:
      test: ["CMD", "wget", "--spider", "-q", "http://localhost:8123/ping"]
      interval: 5s
      timeout: 5s
      retries: 10
      start_period: 10s

  # ==========================================
  # Service 1: Ingestion API Gate
  # ==========================================
  api:
    build:
      context: .
      dockerfile: Dockerfile.api
    container_name: ingestion-api
    ports:
      - "8000:8000"
    environment:
      API_HOST: 0.0.0.0
      API_PORT: 8000
      API_QUEUE_MAX_SIZE: 10000
      WORKER_STATS_URL: http://worker:8001/internal/stats
      KAFKA_BOOTSTRAP_SERVERS: redpanda:29092
      KAFKA_RAW_TOPIC: cdr.raw
      LOG_LEVEL: INFO
    depends_on:
      redpanda:
        condition: service_healthy
      topic-init:
        condition: service_completed_successfully
    healthcheck:
      test: ["CMD", "python", "-c", "import urllib.request; urllib.request.urlopen('http://localhost:8000/health')"]
      interval: 5s
      timeout: 5s
      retries: 10
      start_period: 5s

  # ==========================================
  # Service 2: Processing Worker
  # ==========================================
  worker:
    build:
      context: .
      dockerfile: Dockerfile.worker
    container_name: processing-worker
    ports:
      - "8001:8001"
    environment:
      WORKER_INSTANCE: worker-1
      WORKER_STATS_HOST: 0.0.0.0
      WORKER_STATS_PORT: 8001
      KAFKA_BOOTSTRAP_SERVERS: redpanda:29092
      KAFKA_RAW_TOPIC: cdr.raw
      KAFKA_DLQ_TOPIC: cdr.raw.dlq
      KAFKA_CONSUMER_GROUP: cdr-processing-group
      KAFKA_AUTO_OFFSET_RESET: earliest
      CLICKHOUSE_HOST: clickhouse
      CLICKHOUSE_PORT: 8123
      CLICKHOUSE_USER: default
      CLICKHOUSE_PASSWORD: ""
      CLICKHOUSE_DATABASE: telecom
      CLICKHOUSE_TABLE: cdr_records
      BATCH_SIZE: 1000
      BATCH_FLUSH_INTERVAL_SECONDS: 2
      CH_RETRY_MAX_ATTEMPTS: 3
      CH_RETRY_INITIAL_DELAY_MS: 500
      CH_RETRY_BACKOFF_FACTOR: 2.0
      LOG_LEVEL: INFO
    depends_on:
      redpanda:
        condition: service_healthy
      topic-init:
        condition: service_completed_successfully
      clickhouse:
        condition: service_healthy
    healthcheck:
      test: ["CMD", "python", "-c", "import urllib.request; urllib.request.urlopen('http://localhost:8001/health')"]
      interval: 5s
      timeout: 5s
      retries: 10
      start_period: 5s