# MediLingua — single-container HF Space (Docker SDK)
# Builds React frontend with Node 20, then runs FastAPI on port 7860.

FROM python:3.11-slim

# Install Node 20 via NodeSource + minimal build tools
RUN apt-get update && apt-get install -y --no-install-recommends \
      curl \
      ca-certificates \
      gnupg \
    && curl -fsSL https://deb.nodesource.com/setup_20.x | bash - \
    && apt-get install -y --no-install-recommends nodejs ffmpeg \
    && rm -rf /var/lib/apt/lists/*

# HF Spaces wants a non-root user. UID 1000 is the conventional choice.
RUN useradd -m -u 1000 user

# HF cache must live somewhere the non-root user can write.
ENV HF_HOME=/tmp/huggingface \
    TRANSFORMERS_CACHE=/tmp/huggingface \
    PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    PIP_NO_CACHE_DIR=1 \
    PORT=7860

WORKDIR /app

# --- Python deps (cached layer) ---
COPY backend/requirements.txt /app/backend/requirements.txt
RUN pip install --no-cache-dir -r /app/backend/requirements.txt

# --- Frontend build (cached if package files unchanged) ---
COPY frontend/package.json frontend/package-lock.json* /app/frontend/
WORKDIR /app/frontend
# Use npm install if no lockfile, otherwise npm ci for reproducible builds.
RUN if [ -f package-lock.json ]; then npm ci; else npm install; fi

# Copy frontend source and build
COPY frontend/ /app/frontend/
RUN npm run build && rm -rf node_modules

# --- Backend source ---
WORKDIR /app
COPY backend/ /app/backend/

# Make /tmp/huggingface writeable for cached HF artifacts
RUN mkdir -p /tmp/huggingface && chown -R user:user /tmp/huggingface /app

USER 1000

EXPOSE 7860

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