# ============================================================================
# AI API Dockerfile - Optimized for Hugging Face Spaces
# ============================================================================
# This Dockerfile is configured to run on Hugging Face Spaces with:
# - Port 7860 (HF Spaces default)
# - Non-root user for security
# - CUDA support for GPU acceleration
# - 4-bit quantization for efficient memory usage
# ============================================================================

FROM nvidia/cuda:12.1.0-cudnn8-runtime-ubuntu22.04

# Set environment variables
ENV DEBIAN_FRONTEND=noninteractive \
    PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    PIP_NO_CACHE_DIR=1 \
    PIP_DISABLE_PIP_VERSION_CHECK=1 \
    CUDA_HOME=/usr/local/cuda \
    PATH=/usr/local/cuda/bin:${PATH} \
    LD_LIBRARY_PATH=/usr/local/cuda/lib64:${LD_LIBRARY_PATH}

# Install system dependencies
RUN apt-get update && apt-get install -y \
    python3.10 \
    python3-pip \
    python3-dev \
    build-essential \
    git \
    wget \
    curl \
    ca-certificates \
    libgomp1 \
    && rm -rf /var/lib/apt/lists/*

# Create non-root user for security
RUN useradd -m -u 1000 -s /bin/bash appuser

# Set working directory
WORKDIR /app

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

# Upgrade pip and install Python dependencies
RUN pip3 install --upgrade pip setuptools wheel && \
    pip3 install --no-cache-dir -r requirements.txt

# Copy application code
COPY main.py .

# Create necessary directories
RUN mkdir -p /app/logs && \
    chown -R appuser:appuser /app

# Switch to non-root user
USER appuser

# Set default environment variables (can be overridden)
ENV MODEL_NAME="mistralai/Mistral-7B-Instruct-v0.2" \
    API_KEY="your-secret-api-key-here" \
    MAX_LENGTH="2048" \
    TEMPERATURE="0.7" \
    TOP_P="0.95" \
    CACHE_SIZE="100" \
    PORT="7860" \
    HOST="0.0.0.0"

# Expose port 7860 (Hugging Face Spaces default)
EXPOSE 7860

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=60s --retries=3 \
    CMD curl -f http://localhost:7860/health || exit 1

# Run the application
CMD ["python3", "main.py"]