#!/bin/sh

THEME="$1"

XSET=$(readlink -e ~/.config/xsettingsd/xsettingsd.conf)
if [ "$THEME" = "toggle" ]; then
    if  grep Materia-dark "$XSET" > /dev/null; then
        THEME=light
    else
        THEME=dark
    fi
fi

if [ "$THEME" = dark ]; then
    GTK_THEME=Materia-dark
elif [ "$THEME" = light ]; then
    GTK_THEME=Materia-light
else
    echo "error: unknown theme: should be either dark, light or toggle" >&2
    exit 1
fi

XRES=$(readlink -e ~/.Xresources)
if [ -n "$XRES" ]; then
    if [ "$THEME" = dark ]; then
        sed -i 's/^#undef THEME_DARK/#define THEME_DARK/' "$XRES"
    elif [ "$THEME" = light ]; then
        sed -i 's/^#define THEME_DARK/#undef THEME_DARK/' "$XRES"
    fi
    xrdb -merge "$XRES"
    killall -USR1 st
fi

# Alacritty
AYML=$(readlink -e ~/.config/alacritty/alacritty.yml)
if [ -n "$AYML" ]; then
    sed -i "s/^colors: [*].*/colors: *$THEME/" "$AYML"
fi
ATOML=$(readlink -e ~/.config/alacritty/alacritty.toml)
if [ -f "$ATOML" ]; then
    sed -i "s#^import =.*#import = [\"~/.config/alacritty/$THEME.toml\"]#" "$ATOML"
fi

if [ "$THEME" = dark ]; then
    kitten themes --reload-in=all Afterglow
elif [ "$THEME" = light ]; then
    kitten themes --reload-in=all One Half Light
fi

# GTK
if [ -n "$XSET" ]; then
    sed -i -E "s#(Net/ThemeName) .*#\\1 \"${GTK_THEME}\"#" "$XSET"
    pkill -HUP -x xsettingsd
    gsettings set org.gnome.desktop.interface gtk-theme "${GTK_THEME}"
fi

# waybar
WCSS=$(readlink -e ~/.config/waybar/style.css)
if [ -f "$WCSS" ]; then
    sed -i -E "s#file:///.*/(light|dark)[.]css#file://$HOME/.config/waybar/$THEME.css#" "$WCSS"
fi