FROM rocker/shiny:4.5.2

# Install system dependencies for R packages
# - libcurl4-openssl-dev, libssl-dev: for httr2/curl (ellmer dependency)
# - libxml2-dev: for xml2
# - libpoppler-cpp-dev: for pdftools (PDF text and page rendering)
# - libmagick++-dev: for magick (ellmer resizes images with it before sending them)
# - libfontconfig1-dev, libfreetype6-dev: for magick text rendering
RUN apt-get update && apt-get install -y \
    libcurl4-openssl-dev \
    libssl-dev \
    libxml2-dev \
    libpoppler-cpp-dev \
    libmagick++-dev \
    libfontconfig1-dev \
    libfreetype6-dev \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /code

# Install remotes package first, then install specific versions of required packages.
# The last line fails the build if any of them cannot be loaded.
RUN R -e "install.packages('remotes', repos = 'https://cloud.r-project.org')" \
    && R -e "remotes::install_version('shiny', version = '1.13.0', repos = 'https://cloud.r-project.org')" \
    && R -e "remotes::install_version('jsonlite', version = '2.0.0', repos = 'https://cloud.r-project.org')" \
    && R -e "remotes::install_version('ellmer', version = '0.5.0', repos = 'https://cloud.r-project.org')" \
    && R -e "remotes::install_version('pdftools', version = '3.7.0', repos = 'https://cloud.r-project.org')" \
    && R -e "remotes::install_version('magick', version = '2.9.1', repos = 'https://cloud.r-project.org')" \
    && R -e "remotes::install_version('base64enc', version = '0.1-6', repos = 'https://cloud.r-project.org')" \
    && R -e "for (p in c('shiny', 'jsonlite', 'ellmer', 'pdftools', 'magick', 'base64enc')) library(p, character.only = TRUE)"

# Copy only what the app needs (tests, .env and .git are also excluded by .dockerignore)
COPY app.R ./
COPY R/ ./R/
COPY config/ ./config/
COPY www/ ./www/

CMD ["R", "--quiet", "-e", "shiny::runApp(host='0.0.0.0', port=7860)"]