FROM python:3.11-slim

WORKDIR /app

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

# Copy requirements first for layer caching
COPY requirements.txt .

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

# Copy app files
COPY app.py .
COPY index.html .

# Create cache directory for models
RUN mkdir -p /app/model_cache

# Set environment variables
ENV TRANSFORMERS_CACHE=/app/model_cache
ENV HF_HOME=/app/model_cache
ENV PYTHONUNBUFFERED=1
ENV PORT=7860

# Expose port (HuggingFace Spaces uses 7860)
EXPOSE 7860

# Run with gunicorn
CMD ["gunicorn", "--bind", "0.0.0.0:7860", "--timeout", "300", "--workers", "1", "--threads", "2", "app:app"]