# Use Python 3.9 as the base image
FROM python:3.11-slim

# Set working directory
WORKDIR /app

# Install system dependencies
RUN apt-get update && \
    apt-get install -y --no-install-recommends \
    build-essential \
    python3-dev \
    && rm -rf /var/lib/apt/lists/*

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

# Copy requirements first to leverage Docker cache
COPY requirements.txt /app/requirements.txt

# Install dependencies in virtual environment
RUN pip install --no-cache-dir --upgrade -r /app/requirements.txt
RUN pip install -qU chainlit

# Copy the rest of the application
COPY . .

# Expose the default Chainlit port
EXPOSE 7860

CMD ["chainlit", "run", "app.py", "--port", "7860"]