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import {type ReactElement, useEffect} from 'react';
import {Link as RouterLink, useLocation} from 'react-router-dom';
import {Box, Button, Stack, Typography} from '@mui/material';
import LegalPageShell from '../../components/layout/LegalPageShell';
import {selectIsAuthenticated} from '../../features/auth/authSlice';
import {useAppSelector} from '../../store/hooks';
/**
* Tells crawlers not to index this page for as long as it is on screen.
*
* A single-page app answers every URL with HTTP 200, so without this a
* mistyped or retired link becomes a "soft 404" that search engines will
* happily index.
*/
function useNoIndex(): void {
useEffect(() => {
const meta = document.createElement('meta');
meta.name = 'robots';
meta.content = 'noindex';
document.head.appendChild(meta);
return () => {
document.head.removeChild(meta);
};
}, []);
}
/**
* Shown for any URL that matches no route (FSC-167).
*
* Unknown paths used to redirect silently to the landing page, which left a
* visitor who mistyped a URL — or followed a stale link — believing they had
* arrived somewhere real, with the address bar quietly rewritten.
*/
export default function NotFoundPage(): ReactElement {
const {pathname} = useLocation();
const isAuthenticated = useAppSelector(selectIsAuthenticated);
useNoIndex();
return (
<LegalPageShell title="Page Not Found">
<Typography variant="body1" sx={{color: 'text.secondary', mb: 2}}>
We couldn't find a page at{' '}
<Box component="code" sx={{px: 0.75, py: 0.25, borderRadius: 0.5, backgroundColor: 'action.hover', wordBreak: 'break-all'}}>
{pathname}
</Box>
.
</Typography>
<Typography variant="body1" sx={{color: 'text.secondary', mb: 3}}>
The address may have been mistyped, or the page may have moved since the
link was created.
</Typography>
<Stack direction={{xs: 'column', sm: 'row'}} spacing={2}>
<Button component={RouterLink} to="/" variant="contained">
Go to Homepage
</Button>
{isAuthenticated ? (
<Button component={RouterLink} to="/dashboard" variant="outlined">
Go to Dashboard
</Button>
) : (
<Button component={RouterLink} to="/login" variant="outlined">
Sign In
</Button>
)}
<Button component={RouterLink} to="/support" variant="text">
Contact Support
</Button>
</Stack>
</LegalPageShell>
);
}
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