FROM python:3.9-slim AS builder

WORKDIR /app

COPY ./pyproject.toml .
COPY ./poetry.lock .

# Install build dependencies
RUN apt-get update \
    && apt-get install -y --no-install-recommends build-essential \
    && pip install --upgrade pip poetry \
    && poetry config virtualenvs.create false \
    && poetry install --no-interaction --no-ansi

FROM python:3.9-slim

WORKDIR /app

# Install runtime dependencies
RUN apt-get update \
    && apt-get install -y --no-install-recommends libpq5 \
    && apt-get clean \
    && rm -rf /var/lib/apt/lists/*

# Copy the built virtual environment from the builder stage
COPY --from=builder /usr/local /usr/local

# Copy the rest of the backend files to the container
COPY ./ .

# Expose the backend port (change this if your FastAPI app uses a different port)
EXPOSE 7860

CMD ["gunicorn", "main:app", "-w", "4", "--bind", "0.0.0.0:7860"]