# Defines the global color theme option.

{ lib, ... }:

with lib; with types;

# Define the type in a let binding to prevent too much rightward
# drift in the option configuration.
let themeType =

    let # Named colors are colors like "red" or "black".
    	named = submodule {
            options = {
                normal = mkOption { type = str; };
                bright = mkOption { type = str; };
                pastel = mkOption { type = str; };
            };
        };

        # Special colors are more abstract, for example
        # "foreground".
        special = submodule {
            options = {
                primary = mkOption { type = str; };
                normal = mkOption { type = str; };
                slight = mkOption { type = str; };
            };
        };

    in submodule {
        options = {
            foreground = mkOption { type = special; };
            background = mkOption { type = special; };
            grayscales = mkOption { type = listOf str; };
            red        = mkOption { type = named; };
            green      = mkOption { type = named; };
            blue       = mkOption { type = named; };
            yellow     = mkOption { type = named; };
            purple     = mkOption { type = named; };
            cyan       = mkOption { type = named; };
            pink       = mkOption { type = named; };
            orange     = mkOption { type = named; };
            misc       = mkOption { type = attrsOf str; };
            hex        = mkOption { type = themeType; };
        };
    };

in {

	options.custom.gui.theme = mkOption {
		type = themeType;
		description = ''
			Color theme used across the installation for various
			GUI elements and terminal colors.
		'';
	};

}