ARG PYTHON_IMAGE=python:3.12-slim@sha256:7a8b475003c4fe15a2cd4e55e5cfc2f3560bdc9333d624f24cdd6d4340fd7a17
FROM ${PYTHON_IMAGE} AS base

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PIP_NO_CACHE_DIR=1

WORKDIR /app

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

FROM base AS test
COPY . .

FROM base AS runtime

COPY app.py ./
COPY engin/ ./engin/
COPY assets/ ./assets/
COPY .streamlit/ ./.streamlit/
COPY artifacts/ ./artifacts/
COPY test.csv predictions.csv prediction_diagnostics.csv ./

EXPOSE 8501

HEALTHCHECK --interval=30s --timeout=5s --start-period=30s --retries=3 \
  CMD python -c "import urllib.request; urllib.request.urlopen('http://127.0.0.1:8501/_stcore/health', timeout=3)"

CMD ["streamlit", "run", "app.py", "--server.address=0.0.0.0", "--server.port=8501"]