FROM python:3.11-slim

# System dependencies: Tesseract OCR + Poppler (PDF rendering)
RUN apt-get update && apt-get install -y --no-install-recommends \
    tesseract-ocr \
    poppler-utils \
    libgl1 \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Install Python dependencies first (layer cache)
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy application code
COPY . .

# HuggingFace Spaces runs on port 7860
EXPOSE 7860

# Streamlit config: bind to 0.0.0.0:7860, disable CORS/XSRF for Spaces
ENV STREAMLIT_SERVER_PORT=7860 \
    STREAMLIT_SERVER_ADDRESS=0.0.0.0 \
    STREAMLIT_SERVER_ENABLE_CORS=false \
    STREAMLIT_SERVER_ENABLE_XSRF_PROTECTION=false \
    STREAMLIT_BROWSER_GATHER_USAGE_STATS=false

CMD ["streamlit", "run", "app.py"]