services:
  kafka:
    image: apache/kafka:latest
    container_name: kafka
    ports:
      - "9092:9092"
    environment:
      # KRaft configuration (bez ZooKeeper)
      KAFKA_NODE_ID: 1
      KAFKA_PROCESS_ROLES: broker,controller
      KAFKA_CONTROLLER_QUORUM_VOTERS: 1@kafka:9093

      # Listeners configuration
      KAFKA_LISTENERS: PLAINTEXT://0.0.0.0:29092,CONTROLLER://0.0.0.0:9093,EXTERNAL://0.0.0.0:9092
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:29092,EXTERNAL://localhost:9092
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,CONTROLLER:PLAINTEXT,EXTERNAL:PLAINTEXT
      KAFKA_CONTROLLER_LISTENER_NAMES: CONTROLLER
      KAFKA_INTER_BROKER_LISTENER_NAME: PLAINTEXT

      # Storage
      KAFKA_LOG_DIRS: /var/lib/kafka/data

      # Development settings
      KAFKA_AUTO_CREATE_TOPICS_ENABLE: "true"
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
      KAFKA_TRANSACTION_STATE_LOG_REPLICATION_FACTOR: 1
      KAFKA_TRANSACTION_STATE_LOG_MIN_ISR: 1

      # Cluster ID (dla KRaft)
      CLUSTER_ID: "5L6g3nShT-eMCtK--X86sw"
    healthcheck:
      test: ["CMD-SHELL", "kafka-broker-api-versions.sh --bootstrap-server localhost:29092"]
      interval: 30s
      timeout: 10s
      retries: 3
      start_period: 60s

  kafka-ui:
    image: provectuslabs/kafka-ui:latest
    container_name: kafka-ui
    depends_on:
      kafka:
        condition: service_healthy
    ports:
      - "8080:8080"
    environment:
      KAFKA_CLUSTERS_0_NAME: local
      KAFKA_CLUSTERS_0_BOOTSTRAPSERVERS: kafka:29092
      KAFKA_CLUSTERS_0_READONLY: "false"