#!/bin/sh

THEME="$1"

if [ "$THEME" = dark ]; then
    SIGNAL=USR1
    BGCOLOR=#4a4a4a
elif [ "$THEME" = light ]; then
    SIGNAL=USR2
    BGCOLOR=#dde1e3
else
    echo "error: unknown theme: should be either dark or light" >&2
    exit 1
fi

# Background color
xsetroot -solid "$BGCOLOR"

# Alacritty
if [ -f ~/.config/alacritty/alacritty.yml ]; then
    sed -i "s/^colors: [*].*/colors: *$THEME/" ~/.config/alacritty/alacritty.yml
fi

# ST (patched)
pkill -$SIGNAL -x st

# GTK
if [ -f ~/.config/xsettingsd/xsettingsd.conf ]; then
    sed -i -E "s#(Net/ThemeName) .*#\\1 \"Materia-$THEME\"#" ~/.config/xsettingsd/xsettingsd.conf
    pkill -HUP -x xsettingsd
fi

# Emacs
if which emacsclient > /dev/null; then
    emacsclient --eval "(my-select-theme '$THEME)"
fi