# Use Python 3.9 slim image
FROM python:3.9-slim

# Set working directory
WORKDIR /app

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE 1
ENV PYTHONUNBUFFERED 1
ENV FLASK_APP app
ENV FLASK_ENV production

# Install dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
  gcc \
  libpq-dev \
  && apt-get clean \
  && rm -rf /var/lib/apt/lists/*

# Install Python packages
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy application code
COPY . .

# Create a non-root user to run the application
RUN adduser --disabled-password --gecos "" netviz
RUN chown -R netviz:netviz /app
USER netviz

# Run gunicorn with 4 workers
CMD gunicorn --bind 0.0.0.0:5000 --workers 4 "app:create_app()"