FROM python:3.10-slim

# Create user with ID 1000 (required for Hugging Face Spaces)
RUN useradd -m -u 1000 user

# Set environment variables
ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH \
    PYTHONPATH=$HOME/app \
    PYTHONUNBUFFERED=1 \
    GRADIO_SERVER_NAME=0.0.0.0

# Install system dependencies for OpenCV and image processing
RUN apt-get update && apt-get install -y \
    libgl1-mesa-glx \
    libglib2.0-0 \
    libsm6 \
    libxext6 \
    libxrender-dev \
    libgomp1 \
    libgtk-3-0 \
    libavcodec-dev \
    libavformat-dev \
    libswscale-dev \
    curl \
    && rm -rf /var/lib/apt/lists/*

# Switch to user and set working directory
USER user
WORKDIR $HOME/app

# Copy requirements first for better Docker layer caching
COPY --chown=user ./requirements.txt requirements.txt

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

# Copy all application files
COPY --chown=user . $HOME/app

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

# Health check for the application
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:7860/ || exit 1

# Run the Gradio application
CMD ["python", "app.py"]