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import { useCallback, type ChangeEvent, type FC } from 'react';
import { useIntl } from 'react-intl';
import { type PrismTheme, usePrismTheme } from '../../../../utils/providers';
import { Icon, Legend } from '../../../atoms';
import {
Switch,
type SwitchOption,
type SwitchProps,
} from '../../../molecules';
export type PrismThemeToggleProps = Omit<
SwitchProps,
'isInline' | 'items' | 'name' | 'onSwitch' | 'value'
>;
/**
* PrismThemeToggle component
*
* Render a Toggle component to set code blocks theme.
*/
export const PrismThemeToggle: FC<PrismThemeToggleProps> = (props) => {
const intl = useIntl();
const { theme, setTheme, resolvedTheme } = usePrismTheme();
/**
* Check if the resolved or chosen theme is dark theme.
*
* @returns {boolean} True if it is dark theme.
*/
const isDarkTheme = (prismTheme?: PrismTheme): boolean => {
if (prismTheme === 'system') return resolvedTheme === 'dark';
return prismTheme === 'dark';
};
const updateTheme = useCallback(
(e: ChangeEvent<HTMLInputElement>) => {
setTheme(e.target.value === 'light' ? 'light' : 'dark');
},
[setTheme]
);
const themeLabel = intl.formatMessage({
defaultMessage: 'Code blocks:',
description: 'PrismThemeToggle: theme label',
id: 'ftXN+0',
});
const lightThemeLabel = intl.formatMessage({
defaultMessage: 'Light theme',
description: 'PrismThemeToggle: light theme label',
id: 'tsWh8x',
});
const darkThemeLabel = intl.formatMessage({
defaultMessage: 'Dark theme',
description: 'PrismThemeToggle: dark theme label',
id: 'og/zWL',
});
const options: [SwitchOption, SwitchOption] = [
{
id: 'code-blocks-light',
label: (
<>
<span className="screen-reader-text">{lightThemeLabel}</span>
<Icon shape="sun" />
</>
),
value: 'light',
},
{
id: 'code-blocks-dark',
label: (
<>
<span className="screen-reader-text">{darkThemeLabel}</span>
<Icon shape="moon" />
</>
),
value: 'dark',
},
];
return (
<Switch
{...props}
isInline
items={options}
legend={<Legend>{themeLabel}</Legend>}
name="code-blocks"
onSwitch={updateTheme}
value={isDarkTheme(theme) ? 'dark' : 'light'}
/>
);
};
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