FROM python:3.11-slim

WORKDIR /app

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

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

# Pre-download embedding models to cache them
RUN python -c "from sentence_transformers import SentenceTransformer; SentenceTransformer('all-MiniLM-L6-v2', cache_folder='./models')"

# Copy application code
COPY . .

# Create necessary directories
RUN mkdir -p chroma_db models

EXPOSE 7860

CMD ["python", "app.py"]