#!/bin/sh

main () {
    case "$1" in
        d|dark)
            set_scheme dark ;;
        l|light)
            set_scheme light ;;
        *)
            echo "usage: scheme [dark|light]" ;;
    esac
}

set_scheme () {
    if [ "$1" = "dark" ]; then
        GTK_THEME=$(cat "$XDG_CONFIG_HOME/scheme/gtk-theme-dark")
        QT_THEME=$(cat "$XDG_CONFIG_HOME/scheme/qt-theme-dark")
        TERM_THEME=$(cat "$XDG_CONFIG_HOME/scheme/term-theme-dark")
        FZF_COLOR=dark
        PREFER_DARK="true"
        PREFER_DARK_STR="prefer-dark"
    else
        GTK_THEME=$(cat "$XDG_CONFIG_HOME/scheme/gtk-theme-light")
        QT_THEME=$(cat "$XDG_CONFIG_HOME/scheme/qt-theme-light")
        TERM_THEME=$(cat "$XDG_CONFIG_HOME/scheme/term-theme-light")
        FZF_COLOR=light
        PREFER_DARK="false"
        PREFER_DARK_STR="prefer-light"
    fi 

    sed -ir "s|^colors: .*$|colors: $TERM_THEME|" "$XDG_CONFIG_HOME"/alacritty/alacritty.yml

    sed -ir "s|theme=.*$|theme=$QT_THEME|" \
        "$XDG_CONFIG_HOME"/Kvantum/kvantum.kvconfig

    sed -ir "s|gtk-theme-name=.*$|gtk-theme-name=\"$GTK_THEME\"|" \
        "$XDG_CONFIG_HOME"/gtk-2.0/gtkrc

    sed -ir \
        -e "s|gtk-theme-name=.*$|gtk-theme-name=$GTK_THEME|" \
        -e "s|gtk-application-prefer-dark-theme=.*$|gtk-application-prefer-dark-theme=$PREFER_DARK|" \
        "$XDG_CONFIG_HOME"/gtk-3.0/settings.ini \
        "$XDG_CONFIG_HOME"/gtk-4.0/settings.ini

    gsettings set org.gnome.desktop.interface color-scheme $PREFER_DARK_STR
    gsettings set org.gnome.desktop.interface gtk-theme "$GTK_THEME"
    gsettings set org.gnome.desktop.wm.preferences theme "$GTK_THEME"

    echo -n $FZF_COLOR > "$XDG_CONFIG_HOME"/scheme/fzf-color

    # todo: 
    #   - dmenu ?
    #   - send nvim clients theme update
    #   - restart firefox ?
    #   - restart thunderbird ?
}

main "$@"