# Calejo Control Adapter Dockerfile
# Multi-stage build for optimized production image

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

# Set working directory
WORKDIR /app

# Install system dependencies for building
RUN apt-get update && apt-get install -y \
    gcc \
    g++ \
    libpq-dev \
    curl \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements first for better caching
COPY requirements.txt .

# Install Python dependencies to a temporary directory
RUN pip install --no-cache-dir --user -r requirements.txt

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

# Install runtime dependencies only
RUN apt-get update && apt-get install -y \
    libpq5 \
    curl \
    && rm -rf /var/lib/apt/lists/* \
    && apt-get clean

# Create non-root user
RUN useradd -m -u 1000 calejo

# Set working directory
WORKDIR /app

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

# Copy application code (including root-level scripts)
COPY --chown=calejo:calejo . .

# Ensure the user has access to the copied packages
RUN chown -R calejo:calejo /home/calejo/.local

# Switch to non-root user
USER calejo

# Add user's local bin to PATH
ENV PATH=/home/calejo/.local/bin:$PATH

# Expose ports
# REST API: 8080, OPC UA: 4840, Modbus TCP: 502, Prometheus: 9090
EXPOSE 8080
EXPOSE 4840
EXPOSE 502
EXPOSE 9090

# Health check with curl for REST API
HEALTHCHECK --interval=30s --timeout=10s --start-period=30s --retries=3 \
    CMD curl -f http://localhost:8080/health || exit 1

# Environment variables for configuration
ENV PYTHONPATH=/app
ENV PYTHONUNBUFFERED=1

# Run the application
CMD ["python", "-m", "src.main"]