# PAM Dockerfile - Optimized for Hugging Face Spaces (CPU)
FROM python:3.10-slim

# Set environment variables
ENV PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    PIP_NO_CACHE_DIR=1 \
    PIP_DISABLE_PIP_VERSION_CHECK=1 \
    DEBIAN_FRONTEND=noninteractive

# Set working directory
WORKDIR /app

# Install system dependencies for scientific computing (optimized for size)
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    curl \
    git \
    && apt-get clean \
    && rm -rf /var/lib/apt/lists/*

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

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

# Copy application code
COPY . .

# Create data directory if it doesn't exist
RUN mkdir -p /app/data

# Set proper permissions
RUN chmod -R 755 /app

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

# Expose port (Hugging Face Spaces default)
EXPOSE 7860

# Start the FastAPI app using Uvicorn with production settings
CMD ["uvicorn", "api_service:app", \
     "--host", "0.0.0.0", \
     "--port", "7860", \
     "--workers", "1", \
     "--log-level", "info", \
     "--access-log", \
     "--timeout-keep-alive", "75"]