# ---- Builder Stage ----
FROM python:3.10-slim-bookworm as builder

# Install git for fetching git-based dependencies
RUN apt-get update && apt-get install -y --no-install-recommends git && rm -rf /var/lib/apt/lists/*

# Create a virtual environment
RUN python -m venv /opt/venv

# Activate the virtual environment
ENV PATH="/opt/venv/bin:$PATH"

# Copy requirements and install dependencies
WORKDIR /app
COPY requirements.txt .
RUN pip install --no-cache-dir wheel requests==2.32.3 stem==1.8.2
RUN pip install --no-cache-dir --no-build-isolation -r requirements.txt

# ---- Final Stage ----
FROM python:3.10-slim-bookworm

# Set working directory
WORKDIR /app

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

# Activate the virtual environment
ENV PATH="/opt/venv/bin:$PATH"
ENV FLASK_ENV=production
ENV FLASK_APP=ktvmanager.main:create_app

# Copy application code
COPY . .

# Handle versioning
ARG VERSION
RUN if [ -n "$VERSION" ]; then echo $VERSION > VERSION; fi

# Debugging step
RUN ls -l /opt/venv/lib/python3.10/site-packages/

# Make run script executable and run the application
EXPOSE 3001
CMD ["/opt/venv/bin/python", "-m", "flask", "run", "--host=0.0.0.0", "--port=3001"]