FROM python:3.11-slim-bookworm

# ── 1. System packages + R ──────────────────────────────────────────
RUN apt-get update && apt-get install -y --no-install-recommends \
        build-essential \
        r-base \
        libcurl4-openssl-dev \
        libssl-dev \
        libxml2-dev \
        libfontconfig1-dev \
        libfreetype6-dev \
        libharfbuzz-dev \
        libfribidi-dev \
        libpng-dev \
        libjpeg-dev \
        libtiff5-dev \
    && rm -rf /var/lib/apt/lists/*

# ── 2. R packages via Posit Package Manager (bookworm binaries) ──────
RUN Rscript -e "\
    options(repos = c(CRAN = 'https://packagemanager.posit.co/cran/__linux__/bookworm/latest')); \
    install.packages(c( \
        'vctrs', 'rlang', 'pillar', \
        'readr', 'dplyr', 'tidyr', 'lubridate', \
        'ggplot2', 'MASS', 'zoo', 'jsonlite', 'scales' \
    ), Ncpus = 2)"

# ── 3. Install jupyter_client system-wide so IRkernel::installspec() can find it
RUN pip install --no-cache-dir jupyter_client

# ── 4. IRkernel — system-wide ────────────────────────────────────────
RUN Rscript -e "\
    options(repos = c(CRAN = 'https://packagemanager.posit.co/cran/__linux__/bookworm/latest')); \
    install.packages('IRkernel')" \
 && Rscript -e "IRkernel::installspec(user = FALSE)"

# ── 5. Non-root user (HF Spaces requirement) ─────────────────────────
RUN useradd -m -u 1000 user
USER user

ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH

WORKDIR /home/user/app

# ── 6. Python dependencies ───────────────────────────────────────────
COPY --chown=user requirements.txt .
RUN pip install --no-cache-dir --upgrade pip \
 && pip install --no-cache-dir -r requirements.txt

# ── 7. App source ────────────────────────────────────────────────────
COPY --chown=user . .

# ── 8. Gradio networking ─────────────────────────────────────────────
ENV GRADIO_SERVER_NAME="0.0.0.0" \
    GRADIO_SERVER_PORT=7860

EXPOSE 7860

CMD ["python", "app.py"]