// Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
// SPDX-License-Identifier: PolyForm-Noncommercial-1.0.0

package web

import "slices"

// Themes are the colour schemes the admin UI ships, in the order the
// settings switch lists them. Each scheme takes its values from the
// stops of the matplotlib colour map of the same name.
var Themes = []string{"viridis", "plasma", "magma"}

// DefaultTheme is the scheme an account without a choice renders in.
const DefaultTheme = "viridis"

// ThemeCookie carries the colour scheme across the login screen, where
// no account is known yet.
const ThemeCookie = "volumen_admin_theme"

// ValidTheme reports whether the value is a shipped colour scheme.
func ValidTheme(theme string) bool {
	return slices.Contains(Themes, theme)
}