services:
  kafka:
    image: confluentinc/cp-kafka:7.5.0
    container_name: commandflow-kafka
    hostname: kafka
    ports:
      - "9092:9092"
    environment:
      KAFKA_NODE_ID: 1
      KAFKA_PROCESS_ROLES: broker,controller
      KAFKA_CONTROLLER_QUORUM_VOTERS: 1@kafka:29093
      # Deux listeners :
      # PLAINTEXT      → pour les containers Docker entre eux (kafka:29092)
      # PLAINTEXT_HOST → pour les services Python sur la machine hôte (localhost:9092)
      KAFKA_LISTENERS: PLAINTEXT://kafka:29092,PLAINTEXT_HOST://0.0.0.0:9092,CONTROLLER://kafka:29093
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:29092,PLAINTEXT_HOST://localhost:9092
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT,CONTROLLER:PLAINTEXT
      KAFKA_INTER_BROKER_LISTENER_NAME: PLAINTEXT
      KAFKA_CONTROLLER_LISTENER_NAMES: CONTROLLER
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
      KAFKA_TRANSACTION_STATE_LOG_REPLICATION_FACTOR: 1
      KAFKA_TRANSACTION_STATE_LOG_MIN_ISR: 1
      KAFKA_GROUP_INITIAL_REBALANCE_DELAY_MS: 0
      CLUSTER_ID: MkU3OEVBNTcwNTJENDM2Qk
    healthcheck:
      # Vérifie que Kafka accepte des connexions avant de laisser kafdrop démarrer
      test: ["CMD", "kafka-topics", "--bootstrap-server", "localhost:9092", "--list"]
      interval: 10s
      timeout: 10s
      retries: 10
      start_period: 20s

  kafdrop:
    image: obsidiandynamics/kafdrop:latest
    container_name: commandflow-kafdrop
    hostname: kafdrop          # évite un bug DNS du container
    ports:
      - "9000:9000"
    environment:
      KAFKA_BROKERCONNECT: "kafka:29092"
    depends_on:
      kafka:
        condition: service_healthy   # attend que Kafka soit vraiment prêt
    restart: on-failure