FROM python:3.9-slim

WORKDIR /app

# System dependencies
RUN apt-get update && apt-get install -y gcc curl \
    && rm -rf /var/lib/apt/lists/*

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

# Application code
COPY app.py .

# Copy templates directory (contains ar_dashboard.html)
COPY templates/ templates/

# Static dirs
RUN mkdir -p static/css static/js static/images logs

# Non-root user
RUN useradd --create-home --shell /bin/bash app && \
    chown -R app:app /app
USER app

EXPOSE 7860

ENV FLASK_APP=app.py
ENV FLASK_ENV=production
ENV PORT=7860
ENV PYTHONUNBUFFERED=1

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

CMD ["gunicorn", "--bind", "0.0.0.0:7860", "--workers", "2", \
     "--timeout", "120", "--access-logfile", "-", "--error-logfile", "-", \
     "app:app"]