# Langflow - Visual Framework for Building AI Applications
# https://github.com/langflow-ai/langflow
#
# Langflow is a low-code app builder for RAG and multi-agent AI applications.
# It's Python-based and agnostic to any model, API, or database.
#
# Key Features:
# - Visual flow builder for AI applications
# - Support for multiple LLMs (OpenAI, Anthropic, Google, etc.)
# - Built-in components for RAG, agents, and chains
# - Custom component support
# - Real-time monitoring and logging
# - Multi-user support with authentication
#
# Default Access:
# - Access UI at http://localhost:7860
# - No authentication by default (set LANGFLOW_AUTO_LOGIN=false to enable)
#
# Security Notes:
# - Set LANGFLOW_SECRET_KEY for production
# - Use strong database passwords
# - Enable authentication in production
# - Store API keys as global variables, not in flows
# - Enable SSL/TLS in production
#
# License: MIT (https://github.com/langflow-ai/langflow/blob/main/LICENSE)

x-defaults: &defaults
  restart: unless-stopped
  logging:
    driver: json-file
    options:
      max-size: ${LOG_MAX_SIZE:-100m}
      max-file: "${LOG_MAX_FILE:-3}"

services:
  langflow:
    <<: *defaults
    image: ${GLOBAL_REGISTRY:-}langflowai/langflow:${LANGFLOW_VERSION:-1.1.1}
    ports:
      - "${LANGFLOW_PORT_OVERRIDE:-7860}:7860"
    environment:
      # Database configuration
      - LANGFLOW_DATABASE_URL=postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@postgres:5432/${POSTGRES_DB}

      # Storage configuration
      - LANGFLOW_CONFIG_DIR=${LANGFLOW_CONFIG_DIR:-/app/langflow}

      # Server configuration
      - LANGFLOW_HOST=${LANGFLOW_HOST:-0.0.0.0}
      - LANGFLOW_PORT=7860
      - LANGFLOW_WORKERS=${LANGFLOW_WORKERS:-1}

      # Authentication - IMPORTANT: Configure for production
      - LANGFLOW_AUTO_LOGIN=${LANGFLOW_AUTO_LOGIN:-true}
      - LANGFLOW_SUPERUSER=${LANGFLOW_SUPERUSER:-langflow}
      - LANGFLOW_SUPERUSER_PASSWORD=${LANGFLOW_SUPERUSER_PASSWORD:-langflow}
      - LANGFLOW_SECRET_KEY=${LANGFLOW_SECRET_KEY:-}

      # Features
      - LANGFLOW_AUTO_SAVING=${LANGFLOW_AUTO_SAVING:-true}
      - LANGFLOW_AUTO_SAVING_INTERVAL=${LANGFLOW_AUTO_SAVING_INTERVAL:-1000}
      - LANGFLOW_STORE_ENVIRONMENT_VARIABLES=${LANGFLOW_STORE_ENVIRONMENT_VARIABLES:-true}
      - LANGFLOW_FALLBACK_TO_ENV_VAR=${LANGFLOW_FALLBACK_TO_ENV_VAR:-true}

      # Optional: Custom components path
      - LANGFLOW_COMPONENTS_PATH=${LANGFLOW_COMPONENTS_PATH:-}

      # Optional: Load flows from directory
      - LANGFLOW_LOAD_FLOWS_PATH=${LANGFLOW_LOAD_FLOWS_PATH:-}

      # Logging
      - LANGFLOW_LOG_LEVEL=${LANGFLOW_LOG_LEVEL:-error}

      # Other settings
      - TZ=${TZ:-UTC}
      - DO_NOT_TRACK=${DO_NOT_TRACK:-false}

    volumes:
      - langflow_data:${LANGFLOW_CONFIG_DIR:-/app/langflow}
    depends_on:
      postgres:
        condition: service_healthy
    healthcheck:
      test: ["CMD", "python", "-c", "import requests; requests.get('http://localhost:7860/health_check', timeout=5)"]
      interval: 30s
      timeout: 10s
      retries: 5
      start_period: 60s
    deploy:
      resources:
        limits:
          cpus: "${LANGFLOW_CPU_LIMIT:-2.0}"
          memory: "${LANGFLOW_MEMORY_LIMIT:-2G}"
        reservations:
          cpus: "${LANGFLOW_CPU_RESERVATION:-0.5}"
          memory: "${LANGFLOW_MEMORY_RESERVATION:-512M}"

  postgres:
    <<: *defaults
    image: ${GLOBAL_REGISTRY:-}postgres:${POSTGRES_VERSION:-16-alpine}
    environment:
      - POSTGRES_DB=${POSTGRES_DB:-langflow}
      - POSTGRES_USER=${POSTGRES_USER:-langflow}
      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD:-langflow}
      - POSTGRES_INITDB_ARGS=--encoding=UTF8
      - TZ=${TZ:-UTC}
    volumes:
      - postgres_data:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER:-langflow} -d ${POSTGRES_DB:-langflow}"]
      interval: 10s
      timeout: 5s
      retries: 5
      start_period: 10s
    deploy:
      resources:
        limits:
          cpus: "${POSTGRES_CPU_LIMIT:-1.0}"
          memory: "${POSTGRES_MEMORY_LIMIT:-1G}"
        reservations:
          cpus: "${POSTGRES_CPU_RESERVATION:-0.25}"
          memory: "${POSTGRES_MEMORY_RESERVATION:-256M}"

volumes:
  postgres_data:
  langflow_data: