#!/usr/bin/with-contenv bash

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

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

export DEBIAN_FRONTEND="noninteractive"

CALIBRE_RELEASE="$(cat /CALIBRE_RELEASE)"
PACKAGES+=("xz-utils")

if [ ! -L /usr/lib/x86_64-linux-gnu/libGL.so.1 ]; then
    PACKAGES+=("libgl1-mesa-glx")
fi

if [ ! -L /usr/lib/x86_64-linux-gnu/libxdamage.so.1 ]; then
    PACKAGES+=("libxdamage1")
fi

if [ ! -L /usr/lib/x86_64-linux-gnu/libEGL.so.1 ]; then
    PACKAGES+=("libegl1")
fi

if [ ! -L /usr/lib/x86_64-linux-gnu/libxkbcommon.so.0 ]; then
    PACKAGES+=("libxkbcommon0")
fi

if [ ! -L /usr/lib/x86_64-linux-gnu/libOpenGL.so.0 ]; then
    PACKAGES+=("libopengl0")
fi

if [ -v "PACKAGES[@]" ]; then
    apt-get install -y "${PACKAGES[@]}"
fi

echo "**** Fetching calibre bin ****" 
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='[""]' | sed 's/^v//g'); \
fi 

mkdir -p \
    /app/calibre

if [ "$(uname -m)" == "x86_64" ]; then
    curl -o \
        /tmp/calibre.txz -L \
        "https://download.calibre-ebook.com/${CALIBRE_RELEASE}/calibre-${CALIBRE_RELEASE}-x86_64.txz"
fi

if [ "$(uname -m)" == "aarch64" ]; then
    curl -o \
        /tmp/calibre.txz -L \
        "https://download.calibre-ebook.com/${CALIBRE_RELEASE}/calibre-${CALIBRE_RELEASE}-arm64.txz"
fi

tar xf \
    /tmp/calibre.txz \
    -C /app/calibre  

if [ ! -e /usr/bin/calibre-server ]; then
    /app/calibre/calibre_postinstall
fi