# Base image: CUDA 11.8 runtime on Ubuntu 22.04
FROM nvidia/cuda:11.8.0-runtime-ubuntu22.04

# Avoid interactive prompts during build
ENV DEBIAN_FRONTEND=noninteractive
ENV TZ=Etc/UTC

# System dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    # Python
    python3.10 \
    python3.10-dev \
    python3.10-venv \
    python3-pip \
    # FFmpeg
    ffmpeg \
    # OpenCV dependencies
    libgl1-mesa-glx \
    libglib2.0-0 \
    libsm6 \
    libxext6 \
    libxrender-dev \
    # Utilities
    curl \
    wget \
    git \
    ca-certificates \
    && rm -rf /var/lib/apt/lists/*

# Create non-root user
RUN groupadd -g 1000 appuser && \
    useradd -m -u 1000 -g appuser -s /bin/bash appuser

# Set working directory
WORKDIR /app

# Create necessary directories
RUN mkdir -p /scratch /models /data/training /data/output /logs && \
    chown -R appuser:appuser /app /scratch /models /data /logs

# Copy requirements first for better caching
COPY worker/requirements.txt /app/requirements.txt

# Create and activate virtual environment
RUN python3.10 -m venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"

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

# Copy application code
COPY src/ /app/src/
COPY config.yaml /app/config.yaml

# Set environment variables
ENV PYTHONUNBUFFERED=1
ENV PATH="/opt/venv/bin:$PATH"
ENV LD_LIBRARY_PATH=/usr/local/cuda/lib64:$LD_LIBRARY_PATH

# Health check
HEALTHCHECK --interval=30s --timeout=10s --retries=3 \
    CMD python3 -c "import torch; assert torch.cuda.is_available()" || exit 1

# Switch to non-root user
USER appuser

# Default command
CMD ["python3", "-m", "src.main"]