#!/bin/bash -e
set -e

# Tag to allow some debhelper commands to inject relevant code
#DEBHELPER#

if [ "${1}" = "configure" ]; then
    if dpkg --compare-versions ${2} lt "9.0.0"; then
        # Try remove folder if empty, left after 9.0.0~exp1 conf suppression
        # by debhelper conffile handling
        OLD_KDM_DIR=/etc/default/kdm.d
        if [ -d ${OLD_KDM_DIR} ] ; then
            echo "Removing old KDM configuration directory \"${OLD_KDM_DIR}\""
            rmdir ${OLD_KDM_DIR} || true
        fi
    fi
fi

if [[ "$1" = "configure" || "$1" = "abort-upgrade" || "$1" = "abort-remove" ]]; then
    # Theme package alternatives
    while read theme priority; do
        update-alternatives --install \
            /usr/share/desktop-base/active-theme \
            desktop-theme \
            /usr/share/desktop-base/$theme-theme $priority
    done << EOF
softwaves 50
lines 40
joy 30
joy-inksplat 30
spacefun 30
EOF

    # Use active theme as highest priority for background
    update-alternatives --install \
        /usr/share/images/desktop-base/desktop-background \
        desktop-background \
        /usr/share/desktop-base/active-theme/wallpaper/contents/images/1920x1080.svg 70
    # Alternatives for the background in theme packages
    while read theme filename priority; do
        update-alternatives --install \
            /usr/share/images/desktop-base/desktop-background \
            desktop-background \
            /usr/share/desktop-base/$theme-theme/wallpaper/contents/images/$filename $priority
    done << EOF
softwaves 1024x768.svg 65
softwaves 1280x720.svg 65
softwaves 1280x800.svg 65
softwaves 1280x1024.svg 65
softwaves 1600x1200.svg 65
softwaves 1920x1080.svg 65
softwaves 1920x1200.svg 65
softwaves 2560x1440.svg 65
softwaves 2560x1600.svg 65
lines 1280x1024.svg 60
lines 1600x1200.svg 60
lines 1920x1080.svg 60
lines 1920x1200.svg 60
lines 2560x1080.svg 60
joy 1280x720.svg 50
joy 1280x1024.svg 50
joy 1600x1200.svg 50
joy 1920x1080.svg 50
joy 1920x1200.svg 50
joy-inksplat 1280x720.svg 50
joy-inksplat 1280x1024.svg 50
joy-inksplat 1600x1200.svg 50
joy-inksplat 1920x1080.svg 50
joy-inksplat 1920x1200.svg 50
spacefun 1280x720.svg 50
spacefun 1280x1024.svg 50
spacefun 1920x1080.svg 50
spacefun 1920x1200.svg 50
EOF

    # Set up an alternative for the XML version of the background
    # (for GNOME)
    # Highest priority for active theme
    update-alternatives --install \
        /usr/share/images/desktop-base/desktop-background.xml \
        desktop-background.xml \
        /usr/share/desktop-base/active-theme/wallpaper/gnome-background.xml 50
    # Alternatives for theme packages
    while read theme priority; do
        update-alternatives --install \
            /usr/share/images/desktop-base/desktop-background.xml \
            desktop-background.xml \
            /usr/share/desktop-base/$theme-theme/wallpaper/gnome-background.xml $priority
    done << EOF
softwaves 40
lines 30
joy 20
joy-inksplat 20
spacefun 20
EOF

    # Set up an alternative for the XML version of the lock screen
    # (for GNOME)
    # Highest priority for active theme
    update-alternatives --install \
        /usr/share/images/desktop-base/desktop-lockscreen.xml \
        desktop-lockscreen.xml \
        /usr/share/desktop-base/active-theme/lockscreen/gnome-background.xml 50
    # Alternatives for theme packages
    while read theme priority; do
        update-alternatives --install \
            /usr/share/images/desktop-base/desktop-lockscreen.xml \
            desktop-lockscreen.xml \
            /usr/share/desktop-base/$theme-theme/lockscreen/gnome-background.xml $priority
    done << EOF
softwaves 40
lines 30
joy 20
spacefun 20
EOF

    # Set up an alternative for the wallpaper for Plasma 5/KDE
    # Highest priority for active theme
    update-alternatives --install \
        /usr/share/wallpapers/DebianTheme \
        desktop-plasma5-wallpaper \
        /usr/share/desktop-base/active-theme/wallpaper 50
    # Alternatives for theme packages
    while read theme priority; do
        update-alternatives --install \
            /usr/share/wallpapers/DebianTheme \
            desktop-plasma5-wallpaper \
            /usr/share/desktop-base/$theme-theme/wallpaper $priority
    done << EOF
softwaves 40
lines 30
joy 20
joy-inksplat 20
spacefun 20
EOF

    # Login theme
    # Highest priority for active theme
    update-alternatives --install /usr/share/images/desktop-base/login-background.svg \
        desktop-login-background \
        /usr/share/desktop-base/active-theme/login/background.svg 50
    # Alternatives for theme packages
    while read theme background priority; do
        update-alternatives --install /usr/share/images/desktop-base/login-background.svg \
            desktop-login-background \
            /usr/share/desktop-base/$theme-theme/login/$background $priority
    done << EOF
softwaves background.svg 40
lines background.svg 30
lines background-nologo.svg 30
joy background.svg 20
spacefun background.svg 20
EOF

    # Set up an alternative for the GRUB background/colors config
    # Highest priority for active theme
    ## Favor widescreen / hi-res background for efi installations
    num_grub_efi_installed=$(dpkg-query --list "grub-efi*" 2> /dev/null | grep "^i" | wc -l)
    if [ $num_grub_efi_installed -gt 0 ] ; then
        grub_first_ratio="16x9"
        grub_second_ratio="4x3"
    else
        grub_first_ratio="4x3"
        grub_second_ratio="16x9"
    fi
    update-alternatives --install \
        /usr/share/images/desktop-base/desktop-grub.png \
        desktop-grub \
        /usr/share/desktop-base/active-theme/grub/grub-${grub_first_ratio}.png 50 \
        --slave /usr/share/desktop-base/grub_background.sh \
        desktop-grub.sh \
        /usr/share/desktop-base/active-theme/grub/grub_background.sh
    update-alternatives --install \
        /usr/share/images/desktop-base/desktop-grub.png \
        desktop-grub \
        /usr/share/desktop-base/active-theme/grub/grub-${grub_second_ratio}.png 45 \
        --slave /usr/share/desktop-base/grub_background.sh \
        desktop-grub.sh \
        /usr/share/desktop-base/active-theme/grub/grub_background.sh
    # Alternatives for theme packages
    while read theme ratio priority; do
        update-alternatives --install /usr/share/images/desktop-base/desktop-grub.png \
            desktop-grub \
            /usr/share/desktop-base/$theme-theme/grub/grub-$ratio.png $priority \
            --slave /usr/share/desktop-base/grub_background.sh \
            desktop-grub.sh \
            /usr/share/desktop-base/$theme-theme/grub/grub_background.sh
    done << EOF
softwaves 4x3 40
softwaves 16x9 40
lines 4x3 30
lines 16x9 30
joy 4x3 30
joy 16x9 30
spacefun 4x3 30
spacefun 16x9 30
EOF

    # Apply GRUB background update into /boot
    if which update-grub > /dev/null ; then
        # Ensure the background image file has actually been written to disc
        # before updating.
        sync
        update-grub
    fi

    if which update-initramfs > /dev/null; then
        update-initramfs -u
    fi

fi