# Use official Python runtime as a parent image
FROM python:3.12-slim

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1
ENV PORT=8501

# Set working directory
WORKDIR /app

# Install system dependencies (curl for health checks)
RUN apt-get update && apt-get install -y --no-install-recommends \
    curl \
    && rm -rf /var/lib/apt/lists/*

# Install Python dependencies
# We reuse the root requirements.txt for simplicity, or we could have a specific one
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy the rest of the application
COPY . .

# Create a non-root user and switch to it for security
RUN useradd -m appuser && chown -R appuser /app
USER appuser

# Expose Streamlit's default port
EXPOSE 8501

# Command to run the Streamlit app
CMD streamlit run frontend/app.py --server.port=$PORT --server.address=0.0.0.0