# Multi-stage build for Autonomous Traffic Control HF Space
FROM python:3.11-slim as builder

WORKDIR /build

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

# Copy requirements
COPY requirements.txt .

# Install Python dependencies
RUN pip install --no-cache-dir --user -r requirements.txt


# Final stage
FROM python:3.11-slim

WORKDIR /app

# Install runtime dependencies
# libgl1-mesa-glx and libglib2.0-0 are required for OpenCV
RUN apt-get update && apt-get install -y --no-install-recommends \
    libsm6 \
    libxext6 \
    libxrender-dev \
    libgl1 \
    libglib2.0-0 \
    && rm -rf /var/lib/apt/lists/*

# Copy dependencies from builder
COPY --from=builder /root/.local /root/.local

# Set environment variables
ENV PATH=/root/.local/bin:$PATH \
    PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    STREAMLIT_SERVER_PORT=7860 \
    STREAMLIT_SERVER_ADDRESS=0.0.0.0 \
    STREAMLIT_BROWSER_GATHER_USAGE_STATS=false

# Copy all application files and assets (models, videos, scripts)
COPY . .

# Expose the default HF Spaces port
EXPOSE 7860

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
    CMD streamlit hello || exit 1

# Default command runs the Streamlit dashboard
CMD ["streamlit", "run", "dashboard_final.py", "--server.port", "7860", "--server.address", "0.0.0.0"]