# Multi-stage Docker build for GuardDen
# This supports building with or without AI dependencies for smaller images

# Stage 1: Base builder stage
FROM python:3.11-slim as builder

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

# Set up Python environment
RUN pip install --no-cache-dir --upgrade pip setuptools wheel

# Copy project files for dependency installation
COPY pyproject.toml README.md ./
COPY src/ ./src/

# Install dependencies into a virtual environment
RUN python -m venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"

# Build argument to control AI dependencies
ARG INSTALL_AI=false

# Install Python dependencies based on build argument
RUN if [ "$INSTALL_AI" = "true" ]; then \
        pip install --no-cache-dir ".[dev,ai]"; \
    else \
        pip install --no-cache-dir ".[dev]"; \
    fi

# Stage 2: Runtime stage
FROM python:3.11-slim as runtime

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

# Copy Python virtual environment from builder stage
COPY --from=builder /opt/venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"

# Create application directory
WORKDIR /app

# Copy application code
COPY src/ ./src/
COPY migrations/ ./migrations/
COPY alembic.ini ./
COPY pyproject.toml README.md ./

# Create non-root user with specific UID/GID for security
RUN groupadd -r -g 1000 guardden && \
    useradd -r -u 1000 -g guardden -d /app -s /bin/bash guardden && \
    chown -R guardden:guardden /app

# Create directories for data and logs
RUN mkdir -p /app/data /app/logs && \
    chown -R guardden:guardden /app/data /app/logs

# Switch to non-root user
USER guardden

# Add health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=60s --retries=3 \
    CMD curl -f http://localhost:8000/api/health || exit 1

# Set environment variables
ENV PYTHONUNBUFFERED=1
ENV PYTHONDONTWRITEBYTECODE=1
ENV GUARDDEN_DATA_DIR=/app/data

# Expose port for dashboard (if enabled)
EXPOSE 8000

# Default command
CMD ["python", "-m", "guardden"]

# Stage 3: Development stage (optional)
FROM runtime as development

# Switch back to root to install dev tools
USER root

# Install additional development tools
RUN apt-get update && apt-get install -y --no-install-recommends \
    git \
    vim \
    htop \
    && rm -rf /var/lib/apt/lists/*

# Install development Python packages if not already installed
RUN pip install --no-cache-dir \
    pytest-xdist \
    pytest-benchmark \
    ipdb \
    jupyter

# Switch back to guardden user
USER guardden

# Override entrypoint for development
CMD ["python", "-m", "guardden", "--dev"]