# Multi-stage build for Python FastAPI backend
# Job ID: MTAD-IMPL-2025-11-18-CL

FROM python:3.11-slim as builder

WORKDIR /app

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

# Copy requirements and install dependencies
COPY requirements.txt .
RUN pip install --user --no-cache-dir -r requirements.txt


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/*

# Copy Python packages from builder
COPY --from=builder /root/.local /root/.local

# Set environment variables
ENV PATH=/root/.local/bin:$PATH
ENV PYTHONUNBUFFERED=1
ENV PYTHONDONTWRITEBYTECODE=1

# Copy application code
COPY . .

# Create non-root user for security
RUN useradd -m -u 1000 appuser && chown -R appuser:appuser /app
USER appuser

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

# Expose port
EXPOSE 8000

# Run application
CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]