FROM python:3.10

WORKDIR /app

# System deps
RUN apt-get update && apt-get install -y \
    git \
    curl \
    && rm -rf /var/lib/apt/lists/*

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

# Pre-download model (IMPORTANT: avoids runtime network issues)
RUN python -c "from transformers import AutoTokenizer, AutoModelForCausalLM; \
AutoTokenizer.from_pretrained('distilgpt2'); \
AutoModelForCausalLM.from_pretrained('distilgpt2')"

# Copy app
COPY app.py .

EXPOSE 7860

CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]