FROM python:3.10-slim

WORKDIR /app

# Install system dependencies
RUN apt-get update && apt-get install -y \
    build-essential \
    tesseract-ocr \
    poppler-utils \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements first for caching
COPY requirements.txt .

# Install CPU-only PyTorch (smaller, less RAM)
RUN pip install --no-cache-dir torch --index-url https://download.pytorch.org/whl/cpu

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

# Copy application code
COPY . .

# Create directories
RUN mkdir -p /tmp/uploads /tmp/chroma_db

# Expose port (Hugging Face Spaces uses 7860)
EXPOSE 7860

# Set environment variables
ENV HOST=0.0.0.0
ENV PORT=7860
ENV UPLOAD_DIR=/tmp/uploads
ENV CHROMA_DIR=/tmp/chroma_db

# Run the application
CMD ["python", "main.py"]