# FreeTable Backend Dockerfile
# Multi-stage build for production

# ============== Builder Stage ==============
FROM python:3.11-slim as builder

WORKDIR /app

# Install build dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    gcc \
    libpq-dev \
    && rm -rf /var/lib/apt/lists/*

# Install Python dependencies
COPY backend/requirements.txt .
RUN pip install --no-cache-dir --user -r requirements.txt

# ============== Production Stage ==============
FROM python:3.11-slim

WORKDIR /app

# Install runtime dependencies only
RUN apt-get update && apt-get install -y --no-install-recommends \
    libpq5 \
    curl \
    && rm -rf /var/lib/apt/lists/*

# Create non-root user for security
RUN groupadd -r freetable && useradd -r -g freetable freetable

# Copy installed packages from builder
COPY --from=builder /root/.local /home/freetable/.local

# Copy application code
COPY --chown=freetable:freetable backend/app ./app
COPY --chown=freetable:freetable backend/requirements.txt .
COPY --chown=freetable:freetable backend/run.py .

# Set environment variables
ENV PATH=/home/freetable/.local/bin:$PATH \
    PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PYTHONPATH=/app

# Switch to non-root user
USER freetable

# Expose port
EXPOSE 8000

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:8000/health || exit 1

# Run with Gunicorn for production
CMD ["sh", "-c", "pip install gunicorn --quiet && exec gunicorn app.main:app \
    --bind 0.0.0.0:8000 \
    --workers 2 \
    --threads 4 \
    --worker-class uvicorn.workers.UvicornWorker \
    --access-logfile - \
    --error-logfile - \
    --capture-output \
    --enable-stdio-inheritance"]