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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { useState, useCallback, useEffect } from 'react';
import { themeManager } from '../themes/theme-manager.js';
import { LoadedSettings, SettingScope } from '../../config/settings.js'; // Import LoadedSettings, AppSettings, MergedSetting
interface UseThemeCommandReturn {
isThemeDialogOpen: boolean;
openThemeDialog: () => void;
handleThemeSelect: (
themeName: string | undefined,
scope: SettingScope,
) => void; // Added scope
handleThemeHighlight: (themeName: string | undefined) => void;
}
export const useThemeCommand = (
loadedSettings: LoadedSettings,
setThemeError: (error: string | null) => void,
): UseThemeCommandReturn => {
// Determine the effective theme
const effectiveTheme = loadedSettings.merged.theme;
// Initial state: Open dialog if no theme is set in either user or workspace settings
const [isThemeDialogOpen, setIsThemeDialogOpen] = useState(
effectiveTheme === undefined, // Open dialog if no theme is set initially
);
// TODO: refactor how theme's are accessed to avoid requiring a forced render.
const [, setForceRender] = useState(0);
// Apply initial theme on component mount
useEffect(() => {
// Only try to set a theme if one is actually defined.
// If effectiveTheme was undefined, the dialog is already open due to useState above.
if (effectiveTheme !== undefined) {
if (!themeManager.setActiveTheme(effectiveTheme)) {
setIsThemeDialogOpen(true);
setThemeError(`Theme "${effectiveTheme}" not found.`);
} else {
setThemeError(null); // Clear any previous theme error on success
}
}
}, [effectiveTheme, setThemeError]); // Re-run if effectiveTheme or setThemeError changes
const openThemeDialog = useCallback(() => {
setIsThemeDialogOpen(true);
}, []);
const applyTheme = useCallback(
(themeName: string | undefined) => {
if (!themeManager.setActiveTheme(themeName)) {
// If theme is not found, open the theme selection dialog and set error message
setIsThemeDialogOpen(true);
setThemeError(`Theme "${themeName}" not found.`);
} else {
setForceRender((v) => v + 1); // Trigger potential re-render
setThemeError(null); // Clear any previous theme error on success
}
},
[setForceRender, setThemeError],
);
const handleThemeHighlight = useCallback(
(themeName: string | undefined) => {
applyTheme(themeName);
},
[applyTheme],
);
const handleThemeSelect = useCallback(
(themeName: string | undefined, scope: SettingScope) => {
// Added scope parameter
try {
loadedSettings.setValue(scope, 'theme', themeName); // Update the merged settings
applyTheme(loadedSettings.merged.theme); // Apply the current theme
} finally {
setIsThemeDialogOpen(false); // Close the dialog
}
},
[applyTheme, loadedSettings],
);
return {
isThemeDialogOpen,
openThemeDialog,
handleThemeSelect,
handleThemeHighlight,
};
};
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