FROM python:3.11-slim

WORKDIR /app

RUN apt-get update && apt-get install -y --no-install-recommends \
    libgl1 \
    libglib2.0-0 \
    libsm6 \
    libxext6 \
    libxrender1 \
    && rm -rf /var/lib/apt/lists/*

RUN pip install --no-cache-dir torch torchvision --index-url https://download.pytorch.org/whl/cpu

COPY backend/requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

ENV HF_HOME=/app/model_cache
RUN python -c "\
from langchain_huggingface import HuggingFaceEmbeddings; \
HuggingFaceEmbeddings(model_name='intfloat/multilingual-e5-large'); \
print('Model cached')"

COPY backend/ .

ENV PORT=7860
EXPOSE 7860

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