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import Link from 'next/link';
import { Icon } from '@/components/ui/icons';
import { cn } from '@/lib/core';
import { Button } from '@/components/ui/Button';
import { Tooltip } from '@/components/ui/Tooltip';
import { StarRatingProps } from '@/types/ui';
const sizeConfig = {
sm: { star: 12, gap: 'gap-0.5', text: 'text-xs' },
md: { star: 14, gap: 'gap-1', text: 'text-custom-sm' },
lg: { star: 16, gap: 'gap-1', text: 'text-sm' },
};
/**
* StarRating - Reusable star rating display and input component
*
* Features:
* - Support for partial ratings (4.5 stars shows 4 full + 1 half star)
* - Multiple sizes
* - Optional review count display
* - Interactive mode for rating submission
* - Accessible with aria-label
*
* @example
* ```tsx
* // Display mode with review count
* <StarRating
* rating={4.5}
* reviewCount={128}
* showCount={true}
* />
*
* // Interactive mode for reviews
* <StarRating
* rating={rating}
* interactive={true}
* onRatingChange={setRating}
* />
*
* // Large size without count
* <StarRating
* rating={5}
* size="lg"
* />
* ```
*/
export function StarRating({
rating = 0,
maxStars = 5,
reviewCount,
size = 'md',
showCount = true,
interactive = false,
onRatingChange,
productId,
className}: StarRatingProps) {
const config = sizeConfig[size];
const clampedRating = Math.max(0, Math.min(maxStars, rating));
const fullStars = Math.floor(clampedRating);
const hasHalfStar = clampedRating % 1 >= 0.5;
const handleStarClick = (starIndex: number) => {
if (interactive && onRatingChange) {
onRatingChange(starIndex + 1);
}
};
// eslint-disable-next-line @typescript-eslint/no-unused-vars
const handleStarHover = (_starIndex: number) => {
// Reserved for hover preview in interactive mode
};
// Format rating for tooltip display
const tooltipContent = `${clampedRating.toFixed(1)} out of ${maxStars}`;
// Render a single star icon
const renderStarIcon = (isFilled: boolean, isHalf: boolean) => {
if (isHalf) {
return (
<span className="relative inline-block">
{/* Background empty star */}
<Icon
name="star"
size={config.star}
className="text-gray-300 fill-current"
/>
{/* Foreground half-filled star */}
<span className="absolute inset-0 overflow-hidden" style={{ width: '50%' }}>
<Icon
name="star"
size={config.star}
className="text-yellow-400 fill-current"
/>
</span>
</span>
);
}
return (
<Icon
name="star"
size={config.star}
className={cn(
'fill-current transition-colors',
isFilled ? 'text-yellow-400' : 'text-gray-300',
interactive && 'hover:text-yellow-500'
)}
/>
);
};
const starsContent = (
<span
className={cn('inline-flex items-center', config.gap)}
role="img"
aria-label={`Rating: ${clampedRating} out of ${maxStars} stars`}
>
{Array.from({ length: maxStars }, (_, index) => {
const isFilled = index < fullStars;
const isHalf = index === fullStars && hasHalfStar;
// Use Button only for interactive mode, otherwise use span
if (interactive) {
return (
<Button
key={index}
type="button"
onClick={() => handleStarClick(index)}
onMouseEnter={() => handleStarHover(index)}
variant="ghost"
size="sm"
className="relative p-0 cursor-pointer hover:scale-110 transition-transform"
aria-label={`${index + 1} star${index !== 0 ? 's' : ''}`}
>
{renderStarIcon(isFilled, isHalf)}
</Button>
);
}
// Non-interactive: use span for display only
return (
<span key={index} className="relative inline-flex">
{renderStarIcon(isFilled, isHalf)}
</span>
);
})}
</span>
);
// Build the review link URL if productId is provided
const reviewLink = productId ? `/product/${productId}#reviews` : null;
const ratingContent = (
<div className={cn(
'flex items-center gap-2.5',
reviewLink && 'cursor-pointer hover:opacity-80 transition-opacity',
className
)}>
{interactive ? (
starsContent
) : (
<Tooltip content={reviewLink ? `${tooltipContent} - Click to see reviews` : tooltipContent} position="top">
{starsContent}
</Tooltip>
)}
{showCount && reviewCount !== undefined && (
<p className={cn(config.text, 'text-gray-600 dark:text-gray-400')}>
({reviewCount})
</p>
)}
</div>
);
// Wrap in Link if productId is provided (makes rating clickable to reviews)
if (reviewLink && !interactive) {
return (
<Link href={reviewLink} className="inline-flex">
{ratingContent}
</Link>
);
}
return ratingContent;
}
/**
* Compact star rating display (just stars, no count)
*/
export function StarRatingCompact({ rating = 0, size = 'sm' }: Pick<StarRatingProps, 'rating' | 'size'>) {
return <StarRating rating={rating} size={size} showCount={false} />;
}
/**
* Star rating with count always shown
*/
export function StarRatingWithCount({
rating = 0,
reviewCount = 0,
size = 'md'}: Pick<StarRatingProps, 'rating' | 'reviewCount' | 'size'>) {
return <StarRating rating={rating} reviewCount={reviewCount} size={size} showCount={true} />;
}
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