# --- Builder Stage ---
# Use a full Python image to build dependencies
FROM python:3.12 as builder

WORKDIR /app

# Install dependencies into a virtual environment
RUN python -m venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"

COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# --- Runner Stage ---
# Use a slim image for the final application
FROM python:3.12-slim

WORKDIR /app

# Copy the virtual environment from the builder stage
COPY --from=builder /opt/venv /opt/venv

# Copy the application code
COPY . .

# Set the path to use the virtual environment
ENV PATH="/opt/venv/bin:$PATH"

# Expose the port and run the app
EXPOSE 8000
CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "7860"]