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import {
Box,
ToggleButton,
ToggleButtonGroup,
IconButton,
Alert,
Button,
Paper,
Typography,
} from '@mui/material';
import { BATbernLoader } from '@components/shared/BATbernLoader';
import {
Computer as DesktopIcon,
PhoneIphone as MobileIcon,
Print as PrintIcon,
Refresh as RefreshIcon,
} from '@mui/icons-material';
import { useTranslation } from 'react-i18next';
import { usePublishing } from '@/hooks/usePublishing/usePublishing';
import { PublishingPhase } from '@/types/event.types';
type DeviceType = 'desktop' | 'mobile' | 'print';
interface DeviceDimensions {
width: string;
height: string;
}
export interface LivePreviewProps {
eventCode: string;
phase: PublishingPhase;
}
export const LivePreview: React.FC<LivePreviewProps> = ({ eventCode, phase }) => {
const { t } = useTranslation('organizer');
const { preview, fetchPreview, isLoadingPreview, previewError } = usePublishing(eventCode);
const [device, setDevice] = useState<DeviceType>('desktop');
const [isRefreshing, setIsRefreshing] = useState(false);
const [deviceAnnouncement, setDeviceAnnouncement] = useState('');
const iframeRef = useRef<HTMLIFrameElement>(null);
const prevPreviewRef = useRef(preview);
const deviceDimensions: Record<DeviceType, DeviceDimensions> = {
desktop: { width: '100%', height: '800px' },
mobile: { width: '375px', height: '667px' },
print: { width: '210mm', height: '297mm' },
};
// Auto-refresh when preview content changes
useEffect(() => {
if (prevPreviewRef.current && preview && prevPreviewRef.current !== preview) {
// Content changed, reload iframe
Eif (iframeRef.current) {
iframeRef.current.src = preview.previewUrl;
}
}
prevPreviewRef.current = preview;
}, [preview]);
// Fetch preview on mount or when phase/mode changes
// DISABLED: Causes infinite loop because fetchPreview is not memoized
// Users can manually refresh using the refresh button
// useEffect(() => {
// fetchPreview?.(phase, mode);
// }, [phase, mode, fetchPreview]);
const handleDeviceChange = (_: React.MouseEvent<HTMLElement>, newDevice: DeviceType | null) => {
Eif (newDevice !== null) {
setDevice(newDevice);
setDeviceAnnouncement(t('livePreview.switchedTo', { device: newDevice }));
// Clear announcement after brief delay
setTimeout(() => setDeviceAnnouncement(''), 100);
}
};
const handleRefresh = async () => {
setIsRefreshing(true);
Eif (iframeRef.current?.contentWindow && typeof window !== 'undefined') {
// Reload iframe (only in browser environment)
try {
iframeRef.current.contentWindow.location.reload();
} catch (error) {
// Ignore errors in test environment
console.warn('Failed to reload iframe:', error);
}
}
// Simulate refresh delay
await new Promise((resolve) => setTimeout(resolve, 500));
setIsRefreshing(false);
};
const handleRetry = () => {
fetchPreview?.(phase);
};
const getPreviewUrl = () => {
Eif (preview?.previewUrl) {
return preview.previewUrl;
}
// Generate preview URL - use actual public event page with preview mode
// This allows previewing how the event will look on the public site
const baseUrl = `/events/${eventCode}`;
const params = new URLSearchParams({ preview: 'true' });
if (phase) {
params.append('phase', phase);
}
return `${baseUrl}?${params.toString()}`;
};
const dimensions = deviceDimensions[device];
return (
<Paper sx={{ p: 2 }}>
{/* Screen reader announcement for device changes */}
{deviceAnnouncement && (
<div role="status" aria-live="polite" style={{ position: 'absolute', left: '-10000px' }}>
{deviceAnnouncement}
</div>
)}
{/* Controls */}
<Box sx={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', mb: 2 }}>
{/* Device Toggle */}
<ToggleButtonGroup
value={device}
exclusive
onChange={handleDeviceChange}
aria-label={t('livePreview.devicePreviewMode')}
>
<ToggleButton
value="desktop"
aria-label={t('livePreview.desktopPreview')}
aria-pressed={device === 'desktop'}
>
<DesktopIcon sx={{ mr: { xs: 0, md: 1 } }} />
<Box component="span" sx={{ display: { xs: 'none', md: 'inline' } }}>
{t('livePreview.desktop')}
</Box>
</ToggleButton>
<ToggleButton
value="mobile"
aria-label={t('livePreview.mobilePreview')}
aria-pressed={device === 'mobile'}
>
<MobileIcon sx={{ mr: { xs: 0, md: 1 } }} />
<Box component="span" sx={{ display: { xs: 'none', md: 'inline' } }}>
{t('livePreview.mobile')}
</Box>
</ToggleButton>
<ToggleButton
value="print"
aria-label={t('livePreview.printPreview')}
aria-pressed={device === 'print'}
>
<PrintIcon sx={{ mr: { xs: 0, md: 1 } }} />
<Box component="span" sx={{ display: { xs: 'none', md: 'inline' } }}>
{t('livePreview.print')}
</Box>
</ToggleButton>
</ToggleButtonGroup>
{/* Refresh Button */}
<IconButton
onClick={handleRefresh}
disabled={isRefreshing || isLoadingPreview}
aria-label={t('livePreview.refreshPreview')}
title={t('livePreview.refreshPreview')}
>
<RefreshIcon sx={{ animation: isRefreshing ? 'spin 1s linear infinite' : 'none' }} />
</IconButton>
</Box>
{/* Preview Content */}
<Box
sx={{
position: 'relative',
display: 'flex',
justifyContent: 'center',
minHeight: '400px',
bgcolor: 'grey.100',
borderRadius: 1,
overflow: 'hidden',
}}
>
{/* Loading State */}
{(isLoadingPreview || isRefreshing) && (
<Box
sx={{
position: 'absolute',
top: 0,
left: 0,
right: 0,
bottom: 0,
display: 'flex',
flexDirection: 'column',
alignItems: 'center',
justifyContent: 'center',
bgcolor: 'rgba(255, 255, 255, 0.9)',
zIndex: 2,
gap: 2,
}}
>
<BATbernLoader size={96} data-testid="preview-loading-spinner" />
<Typography variant="body2" color="text.secondary">
{t('livePreview.refreshingPreview')}
</Typography>
</Box>
)}
{/* Error State */}
{previewError && !isLoadingPreview && (
<Box
sx={{
position: 'absolute',
top: '50%',
left: '50%',
transform: 'translate(-50%, -50%)',
width: '80%',
maxWidth: '500px',
}}
>
<Alert
severity="error"
action={
<Button color="inherit" size="small" onClick={handleRetry}>
{t('common:actions.retry')}
</Button>
}
>
{t('livePreview.failedToLoad')}
</Alert>
</Box>
)}
{/* Preview Iframe */}
{!previewError && !isLoadingPreview && (
<iframe
ref={iframeRef}
data-testid="preview-iframe"
src={getPreviewUrl()}
title={t('livePreview.iframeTitle')}
aria-label={t('livePreview.iframeAriaLabel')}
className={device}
style={{
width: dimensions.width,
height: dimensions.height,
border: '1px solid #ccc',
borderRadius: '4px',
display: isRefreshing ? 'none' : 'block',
}}
onLoad={() => setIsRefreshing(false)}
/>
)}
</Box>
{/* Preview Info */}
<Box sx={{ mt: 2, display: 'flex', justifyContent: 'space-between', alignItems: 'center' }}>
<Typography variant="caption" color="text.secondary">
{t('livePreview.previewPhaseCaption', {
phase: phase || 'Topic',
})}
</Typography>
<Typography variant="caption" color="text.secondary">
{t('livePreview.deviceCaption', {
device: device.charAt(0).toUpperCase() + device.slice(1),
width: dimensions.width,
height: dimensions.height,
})}
</Typography>
</Box>
{/* CSS for refresh animation */}
<style>
{`
@keyframes spin {
from { transform: rotate(0deg); }
to { transform: rotate(360deg); }
}
`}
</style>
</Paper>
);
};
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