FROM python:3.10-slim

WORKDIR /app

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1
ENV HF_HOME=/app/.cache/huggingface

# Install system packages required for compiling libraries (like chromadb)
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements.txt from the server/ subdirectory (Crucial difference!)
COPY server/requirements.txt /app/server/

# Install Python dependencies
RUN pip install --no-cache-dir -r /app/server/requirements.txt

# Pre-download and cache the SentenceTransformer model during build time
RUN python -c "from sentence_transformers import SentenceTransformer; SentenceTransformer('BAAI/bge-large-en-v1.5')"

# Copy the entire project (both client/ and server/)
COPY . /app/

# Change working directory to server where main.py resides
WORKDIR /app/server

# Expose Hugging Face Spaces default port
EXPOSE 7860

# Run FastAPI using uvicorn on port 7860
CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "7860"]