#!/usr/bin/with-contenv bash

if [[ "$(uname -m)" == "armv7l" ]]; then
cat <<-EOF
    ********************************************************
    ********************************************************
    *                                                      *
    *                         !!!!                         *
    *   universal-calibre mod is not supported on armhf.   *
    *                                                      *
    ********************************************************
    ********************************************************
EOF
exit 0
fi

if [ ! -f /usr/bin/apt ]; then
cat <<-EOF
    ********************************************************
    ********************************************************
    *                                                      *
    *                         !!!!                         *
    *   universal-calibre mod is only supported on images  *
    *             using an Ubuntu base image.              *
    *                                                      *
    ********************************************************
    ********************************************************
EOF
exit 0
fi

export DEBIAN_FRONTEND="noninteractive"

CALIBRE_RELEASE="$(cat /CALIBRE_RELEASE)"
if [ -z ${CALIBRE_RELEASE+x} ]; then
    CALIBRE_RELEASE=$(curl -sX GET "https://api.github.com/repos/kovidgoyal/calibre/releases/latest" \
    | awk '/tag_name/{print $4;exit}' FS='[""]'); \
fi 


if [ ! -e /usr/bin/calibre-server ] || [ "${CALIBRE_RELEASE}" != "$(cat /config/.CALIBRE_RELEASE || :)" ]; then
    echo "**** Installing/updating calibre ****"
    rm -rf /app/calibre
    mkdir -p \
        /app/calibre
    if [ "$(uname -m)" == "x86_64" ]; then
        curl -o \
            /tmp/calibre.txz -L \
            "https://github.com/kovidgoyal/calibre/releases/download/${CALIBRE_RELEASE}/calibre-${CALIBRE_RELEASE:1}-x86_64.txz"
    elif [ "$(uname -m)" == "aarch64" ]; then
        curl -o \
            /tmp/calibre.txz -L \
            "https://github.com/kovidgoyal/calibre/releases/download/${CALIBRE_RELEASE}/calibre-${CALIBRE_RELEASE:1}-arm64.txz"
    fi
    tar xf \
        /tmp/calibre.txz \
        -C /app/calibre
    rm /tmp/calibre.txz
    /app/calibre/calibre_postinstall
    echo "${CALIBRE_RELEASE}" > /config/.CALIBRE_RELEASE
else
    echo "**** Calibre already installed, skipping ****"
fi