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

# Prevents writing .pyc files and buffering stdout/stderr
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

# Set working directory
WORKDIR /app

# Copy requirements first to leverage Docker cache
COPY requirements.txt .

# Install system dependencies (if needed) and Python deps
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    && rm -rf /var/lib/apt/lists/*

RUN pip install --upgrade pip
RUN pip install --no-cache-dir -r requirements.txt

# Copy app code
COPY . .

# Expose Streamlit default port
EXPOSE 8501

# Streamlit config: run headless and bind to 0.0.0.0
ENV STREAMLIT_SERVER_HEADLESS=true
ENV STREAMLIT_SERVER_ENABLE_CORS=false
ENV STREAMLIT_SERVER_ENABLE_XSRF_PROTECTION=false
ENV STREAMLIT_SERVER_PORT=8501
ENV STREAMLIT_SERVER_ADDRESS=0.0.0.0

# Run Streamlit
CMD ["streamlit", "run", "app.py", "--server.port=8501", "--server.address=0.0.0.0"]