# ── Stage 1: Build React frontend ───────────────────────────────────────────
FROM node:20-slim AS frontend-builder

WORKDIR /app
COPY package.json ./
RUN npm install --silent
COPY public/ ./public/
COPY src/    ./src/
RUN npm run build

# ── Stage 2: Python backend ──────────────────────────────────────────────────
FROM python:3.11-slim

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

WORKDIR /app

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

# Pre-download all models at BUILD time so runtime starts instantly
COPY download_models.py .
RUN python download_models.py

# Copy app files
COPY server.py .
COPY --from=frontend-builder /app/build ./build

# Fix permissions for HF non-root user 1000
RUN mkdir -p /app/.cache/huggingface /app/models \
    && useradd -m -u 1000 hfuser \
    && chown -R hfuser:hfuser /app

USER 1000
ENV HF_HOME=/app/.cache/huggingface
EXPOSE 7860
CMD ["python", "server.py"]