# Multi-stage Dockerfile for Drift Quant on Hugging Face Spaces
# ------------------------------------------------------------------------------
# Stage 1: Build the React 19 Frontend
# ------------------------------------------------------------------------------
FROM node:20-slim AS frontend-builder
WORKDIR /app/frontend

COPY frontend/package*.json ./
RUN npm ci

COPY frontend/ ./
RUN npm run build

# ------------------------------------------------------------------------------
# Stage 2: Python 3.12 Backend & Production Image
# ------------------------------------------------------------------------------
FROM python:3.12-slim

# Install system dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    curl \
    git \
    build-essential \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Install uv for fast, reliable Python dependency resolution
RUN pip install --no-cache-dir uv

# Copy dependency definition and install
COPY pyproject.toml ./
RUN uv pip install --system --no-cache -e .

# Copy backend source code, persisted artifacts, and data archive
COPY src/ /app/src/
COPY artifacts/ /app/artifacts/
COPY all_NSE500_15min_data_2019_onwards.zip /app/all_NSE500_15min_data_2019_onwards.zip

# Copy built frontend assets from builder stage
COPY --from=frontend-builder /app/frontend/dist /app/frontend/dist

# Set environment variables for production execution
ENV PYTHONUNBUFFERED=1 \
    PORT=7860 \
    HOST=0.0.0.0 \
    FRONTEND_DIST_DIR=/app/frontend/dist

# Hugging Face Spaces security requirement: runs as non-root user (UID 1000)
RUN useradd -m -u 1000 user && \
    chown -R user:user /app
USER user
ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH

EXPOSE 7860

# Run FastAPI app on Hugging Face default port 7860
CMD ["uvicorn", "drift_quant.api.app:app", "--host", "0.0.0.0", "--port", "7860"]