FROM python:3.10-slim

WORKDIR /app

# Install system dependencies
RUN apt-get update && apt-get install -y \
    gcc \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements first for caching
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy application code
COPY . .

# Expose port 7860 (Hugging Face default)
EXPOSE 7860

# Run with gunicorn + uvicorn workers for better concurrency
# - 2 workers for CPU hardware (adjust based on available cores)
# - 120s timeout for long video generation
# - graceful timeout for clean shutdown
CMD ["gunicorn", "main:app", \
     "--workers", "2", \
     "--worker-class", "uvicorn.workers.UvicornWorker", \
     "--bind", "0.0.0.0:7860", \
     "--timeout", "300", \
     "--graceful-timeout", "120", \
     "--keep-alive", "5"]