FROM python:3.12-slim

# Set up a new user with user ID 1000
RUN useradd -m -u 1000 user

# Switch to root user temporarily for installing system dependencies
USER root

# Set environment variables for the user
ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH

# Set the working directory to the user's home directory
WORKDIR /home/user/app

# Upgrade pip
RUN pip install --no-cache-dir --upgrade pip==23.3.1

# Install necessary build tools (if required for your dependencies)
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential && \
    rm -rf /var/lib/apt/lists/*

# Switch back to the "user" user
USER user

# Copy the application code into the container at $HOME/app and set the ownership to the "user"
COPY --chown=user product_return_prediction $HOME/app/product_return_prediction
COPY --chown=user README.md $HOME/app/
COPY --chown=user requirements.txt $HOME/app/
COPY --chown=user pyproject.toml $HOME/app/

# Copy the external data and models, ensuring proper permissions
COPY --chown=user models/scaler.pkl $HOME/app/models/
COPY --chown=user models/svm.pkl $HOME/app/models/

# Install Python dependencies
RUN pip install --no-cache-dir -r $HOME/app/requirements.txt

# Expose port 7860 for the app
EXPOSE 7860

# Set the command to run the FastAPI app with Uvicorn
CMD ["uvicorn", "product_return_prediction.api:app", "--host", "0.0.0.0", "--port", "7860", "--reload"]