FROM python:3.10-slim

# Create app user
RUN useradd -m -u 1000 user

WORKDIR /app

# Install system dependencies
RUN apt-get update && apt-get install -y \
    git \
    build-essential \
    libpq-dev \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements and install Python dependencies
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Download required NLTK data
RUN python -m nltk.downloader -d /usr/local/share/nltk_data punkt stopwords

# Create cache directories with proper permissions
RUN mkdir -p /app/.cache && chown -R user:user /app/.cache

# Copy application code
COPY --chown=user:user app/ ./app/
COPY --chown=user:user main.py .
COPY --chown=user:user main_simple.py .
COPY --chown=user:user main_full.py .

# Switch to user
USER user

# Set environment variables
ENV TRANSFORMERS_CACHE=/app/.cache/huggingface
ENV HF_HOME=/app/.cache/huggingface
ENV PYTHONUNBUFFERED=1

# Expose port
EXPOSE 7860

# Run the application (using full version with on-demand loading)
CMD ["uvicorn", "main_full:app", "--host", "0.0.0.0", "--port", "7860"]