FROM python:3.9-slim

# Set working directory
WORKDIR /app

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

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

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

# Copy application files
COPY app.py .
COPY ar_dashboard.html .

# Create necessary directories and move template file
RUN mkdir -p templates static/css static/js static/images logs && \
    mv ar_dashboard.html templates/ar_dashboard.html

# Create non-root user for security
RUN useradd --create-home --shell /bin/bash app && \
    chown -R app:app /app
USER app

# Expose port
EXPOSE 7860

# Set environment variables
ENV FLASK_APP=app.py
ENV FLASK_ENV=production
ENV PORT=7860
ENV PYTHONPATH=/app
ENV PYTHONUNBUFFERED=1

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:7860/health || exit 1

# Run the application
CMD ["gunicorn", "--bind", "0.0.0.0:7860", "--workers", "2", "--timeout", "120", "--access-logfile", "-", "--error-logfile", "-", "app:app"]