# ═══════════════════════════════════════════════════════════════════════════
# PRODUK AI — Dockerfile for Hugging Face Spaces
# Multi-stage build: Node (frontend) → Python (backend + serve)
# ═══════════════════════════════════════════════════════════════════════════

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

WORKDIR /app/frontend

# Install dependencies
COPY frontend/package.json frontend/package-lock.json* ./
RUN npm ci --no-audit --no-fund

# Copy source & build
COPY frontend/ ./

# Set empty API base URL so frontend uses same origin in production
ENV VITE_API_BASE_URL=""
RUN npm run build


# ── Stage 2: Python Backend + Serve Frontend ──────────────────────────────
FROM python:3.12-slim

# System deps for OpenCV headless & general build
RUN apt-get update && apt-get install -y --no-install-recommends \
    libgl1 \
    libglib2.0-0 \
    libsm6 \
    libxext6 \
    libxrender1 \
    && rm -rf /var/lib/apt/lists/*

# Create non-root user (HF Spaces requirement)
RUN useradd -m -u 1000 user
USER user

ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH

WORKDIR /home/user/app

# Install Python dependencies
COPY --chown=user backend/requirements.txt ./requirements.txt
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt

# Copy backend source
COPY --chown=user backend/ ./

# Copy built frontend from stage 1
COPY --from=frontend-builder --chown=user /app/frontend/dist ./frontend_dist

# Create necessary directories
RUN mkdir -p uploads results data models

# Expose port 7860 (HF Spaces default)
EXPOSE 7860

# Health check
HEALTHCHECK --interval=30s --timeout=10s --retries=3 \
    CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:7860/health')" || exit 1

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