frontend/src/components/ui/calendar.tsx

import * as React from 'react';
import { DayPicker } from 'react-day-picker';
import { cn } from '@/lib/utils';
import { buttonVariants } from '@/components/ui/button';

function Calendar({ className, classNames, showOutsideDays = true, ...props }: React.ComponentProps<typeof DayPicker>) {
  return (
    <DayPicker
      showOutsideDays={showOutsideDays}
      className={cn('p-3', className)}
      mode='single'
      classNames={{
        months: 'flex flex-col sm:flex-row gap-2',
        month: 'flex flex-col gap-4',
        month_caption: 'flex justify-center pt-1 relative items-center w-full',
        caption_label: 'text-sm font-medium',
        nav: 'flex items-center gap-1',
        button_previous: cn(
          buttonVariants({ variant: 'outline' }),
          'size-7 bg-transparent p-0 opacity-50 hover:opacity-100 z-10',
          'absolute left-4 top-3'
        ),
        button_next: cn(
          buttonVariants({ variant: 'outline' }),
          'size-7 bg-transparent p-0 opacity-50 hover:opacity-100 z-10',
          'absolute right-4 top-3'
        ),
        month_grid: 'w-full border-collapse space-x-1',
        weekdays: 'flex',
        weekday: 'text-muted-foreground rounded-md w-8 font-normal text-[0.8rem]',
        week: 'flex w-full mt-2',
        day: cn(
          'relative p-0 text-center text-sm focus-within:relative focus-within:z-20 [&:has([aria-selected])]:bg-accent [&:has([aria-selected].day-range-end)]:rounded-r-md',
          props.mode === 'range'
            ? '[&:has(>.day-range-end)]:rounded-r-md [&:has(>.day-range-start)]:rounded-l-md first:[&:has([aria-selected])]:rounded-l-md last:[&:has([aria-selected])]:rounded-r-md'
            : 'aria-selected:rounded-md [&[aria-selected="true"]>button]:hover:bg-foreground [&[aria-selected="true"]>button]:hover:text-background/85'
        ),
        day_button: cn(buttonVariants({ variant: 'ghost' }), 'size-8 p-0 font-normal aria-selected:opacity-100'),
        day_selected: 'opacity-100 bg-yellow-500',
        range_start: 'day-range-start aria-selected:bg-primary aria-selected:text-primary-foreground',
        range_end: 'day-range-end aria-selected:bg-primary aria-selected:text-primary-foreground',
        selected:
          'bg-primary text-primary-foreground hover:bg-primary hover:text-primary-foreground focus:bg-primary focus:text-primary-foreground',
        today: 'bg-accent text-accent-foreground rounded-md',
        outside: 'day-outside text-muted-foreground aria-selected:text-muted-foreground',
        disabled: 'text-muted-foreground opacity-50',
        range_middle: 'aria-selected:bg-accent aria-selected:text-accent-foreground',
        hidden: 'invisible',
        ...classNames,
      }}
      {...props}
    />
  );
}

export { Calendar };