# Backend Dockerfile for Paper Dynasty Game Engine
# Multi-stage build for optimized production image

FROM python:3.11-slim as base

# Set environment variables
ENV PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    PIP_NO_CACHE_DIR=1 \
    PIP_DISABLE_PIP_VERSION_CHECK=1

# Install system dependencies
RUN apt-get update && apt-get install -y \
    curl \
    postgresql-client \
    && rm -rf /var/lib/apt/lists/*

# Create app directory
WORKDIR /app

# Development stage
FROM base as development

# Copy requirements
COPY requirements.txt requirements-dev.txt ./

# Install Python dependencies
RUN pip install -r requirements-dev.txt

# Copy application code
COPY . .

# Expose port
EXPOSE 8000

# Run with uvicorn reload for development
CMD ["python", "-m", "uvicorn", "app.main:socket_app", "--host", "0.0.0.0", "--port", "8000", "--reload"]

# Production stage
FROM base as production

# Copy requirements (production only)
COPY requirements.txt ./

# Install Python dependencies
RUN pip install -r requirements.txt

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

# Copy application code
COPY --chown=appuser:appuser . .

# Switch to non-root user
USER appuser

# Expose port
EXPOSE 8000

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

# Run with production server
CMD ["python", "-m", "uvicorn", "app.main:socket_app", "--host", "0.0.0.0", "--port", "8000", "--workers", "4"]