# Multi-stage build for optimized image size
FROM python:3.11-slim as builder

# Set working directory
WORKDIR /app

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

# Copy requirements
COPY requirements.txt .
COPY pyproject.toml .
COPY README.md .

# Install Python dependencies
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt

# Production stage
FROM python:3.11-slim

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

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

WORKDIR /app

# Copy Python dependencies from builder
COPY --from=builder /usr/local/lib/python3.11/site-packages /usr/local/lib/python3.11/site-packages
COPY --from=builder /usr/local/bin /usr/local/bin

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

# Switch to non-root user
USER appuser

# Expose ports
EXPOSE 7860 8000

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=60s --retries=3 \
    CMD python -c "import requests; requests.get('http://localhost:7860')" || exit 1

# Set Python path
ENV PYTHONPATH=/app/src:$PYTHONPATH

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