# Build stage - install dependencies
FROM python:3.12-slim AS builder

WORKDIR /app

# Install uv for fast dependency management
COPY --from=ghcr.io/astral-sh/uv:latest /uv /usr/local/bin/uv

# Copy dependency files
COPY pyproject.toml uv.lock ./

# Install production dependencies only
RUN uv sync --frozen --no-dev --no-install-project

# Runtime stage - minimal image
FROM python:3.12-slim AS runtime

WORKDIR /app

# Create non-root user
RUN useradd --create-home --shell /bin/bash appuser

# Copy virtual environment from builder
COPY --from=builder /app/.venv /app/.venv

# Copy application code
COPY src/ ./src/
COPY migrations/ ./migrations/
COPY alembic.ini main.py ./

# Set environment variables
ENV PATH="/app/.venv/bin:$PATH"
ENV PYTHONUNBUFFERED=1
ENV PYTHONDONTWRITEBYTECODE=1
ENV FLASK_ENV=production

# Create data directory and set permissions
RUN mkdir -p /app/data && chown -R appuser:appuser /app

# Switch to non-root user
USER appuser

# Expose port
EXPOSE 8000

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:8000/health')" || exit 1

# Run with gunicorn
CMD ["gunicorn", "--bind", "0.0.0.0:8000", "--workers", "2", "--threads", "4", "main:app"]