# Use Python 3.11 slim image as base
FROM python:3.11-slim

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PYTHONPATH=/app \
    PORT=7860

# Set work directory
WORKDIR /

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

# Copy requirements first to leverage Docker cache
COPY requirements.txt .

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

# Copy the rest of the application
COPY . .

# Create a non-root user and set permissions
RUN adduser --disabled-password --gecos '' appuser \
    && chown -R appuser:appuser /app
USER appuser

# Expose port (Hugging Face typically uses port 7860 or 8080)
EXPOSE $PORT

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

# Run the application with uvicorn directly for better production performance
CMD ["sh", "-c", "uvicorn api:app --host 0.0.0.0 --port $PORT"]