# Backend Dockerfile - FastAPI Model Analyzer
FROM python:3.11-slim

# Set working directory
WORKDIR /app

# Install system dependencies for PyTorch and ONNX
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    libgomp1 \
    && rm -rf /var/lib/apt/lists/*

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

# Install Python dependencies
# Using CPU-only PyTorch for smaller image size
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir torch torchvision --index-url https://download.pytorch.org/whl/cpu && \
    pip install --no-cache-dir -r requirements.txt

# Copy application code
COPY app/ ./app/

# Create directory for database
RUN mkdir -p /app/data

# Environment variables
ENV PYTHONUNBUFFERED=1
ENV PYTHONDONTWRITEBYTECODE=1

# Expose port
EXPOSE 8000

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:8000/health')" || exit 1

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