FROM python:3.10-slim

ENV PYTHONUNBUFFERED=1
# Replace TRANSFORMERS_CACHE with HF_HOME
ENV HF_HOME=/app/cache
ENV UPLOAD_DIR=/app/uploads
ENV NLTK_DATA=/tmp/nltk_data
ENV PORT=7860

# Install system dependencies
RUN apt-get update && \
    apt-get install -y --no-install-recommends \
    gcc \
    python3-dev \
    libmagic1 \
    libmupdf-dev \
    poppler-utils \
    && rm -rf /var/lib/apt/lists/*

# Create directories and set permissions
RUN mkdir -p /app/cache /app/uploads /app/static /app/images /tmp/nltk_data && \
    chmod -R 777 /app /tmp/nltk_data

WORKDIR /app

# Copy and install requirements
COPY requirements.txt .
RUN pip install --no-cache-dir -U pip setuptools wheel && \
    pip install --no-cache-dir -r requirements.txt

# Clear cache to avoid conflicts with model names
RUN rm -rf /app/cache/* && \
    chmod -R 777 /app/cache

# Copy application code
COPY . .

# Expose port
EXPOSE 7860

# Healthcheck
HEALTHCHECK --interval=30s --timeout=30s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:7860/health || exit 1

# Run the application
CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]