'use client';

import * as React from 'react';
import { ChevronDownIcon, ChevronLeftIcon, ChevronRightIcon } from 'lucide-react';
import { DayButton, DayPicker, getDefaultClassNames } from 'react-day-picker';

import { cn } from '@/lib/utils';
import { Button, buttonVariants } from '@/components/ui/button';

function Calendar({
	className,
	classNames,
	showOutsideDays = true,
	captionLayout = 'label',
	buttonVariant = 'ghost',
	formatters,
	components,
	...props
}: React.ComponentProps<typeof DayPicker> & {
	buttonVariant?: React.ComponentProps<typeof Button>['variant'];
}) {
	const defaultClassNames = getDefaultClassNames();

	return (
		<DayPicker
			weekStartsOn={1} // Monday as first day for Ireland
			showOutsideDays={showOutsideDays}
			className={cn(
				'bg-background group/calendar p-3 [--cell-size:2rem] [[data-slot=card-content]_&]:bg-transparent [[data-slot=popover-content]_&]:bg-transparent',
				String.raw`rtl:**:[.rdp-button\_next>svg]:rotate-180`,
				String.raw`rtl:**:[.rdp-button\_previous>svg]:rotate-180`,
				className
			)}
			captionLayout={captionLayout}
			formatters={{
				formatMonthDropdown: (date) => date.toLocaleString('en-IE', { month: 'short' }),
				...formatters,
			}}
			classNames={{
				root: cn('w-fit', defaultClassNames.root),
				months: cn('relative flex flex-col gap-4 md:flex-row', defaultClassNames.months),
				month: cn('flex w-full flex-col gap-4', defaultClassNames.month),
				nav: cn(
					'absolute inset-x-0 top-0 flex w-full items-center justify-between gap-1',
					defaultClassNames.nav
				),
				button_previous: cn(
					buttonVariants({ variant: buttonVariant }),
					'h-[--cell-size] w-[--cell-size] select-none p-0 aria-disabled:opacity-50',
					defaultClassNames.button_previous
				),
				button_next: cn(
					buttonVariants({ variant: buttonVariant }),
					'h-[--cell-size] w-[--cell-size] select-none p-0 aria-disabled:opacity-50',
					defaultClassNames.button_next
				),
				month_caption: cn(
					'flex h-[--cell-size] w-full items-center justify-center px-[--cell-size]',
					defaultClassNames.month_caption
				),
				dropdowns: cn(
					'flex h-[--cell-size] w-full items-center justify-center gap-1.5 text-sm font-medium',
					defaultClassNames.dropdowns
				),
				dropdown_root: cn(
					'has-focus:border-ring border-input shadow-xs has-focus:ring-ring/50 has-focus:ring-[3px] relative rounded-md border',
					defaultClassNames.dropdown_root
				),
				dropdown: cn('bg-popover absolute inset-0 opacity-0', defaultClassNames.dropdown),
				caption_label: cn(
					'select-none font-medium',
					captionLayout === 'label'
						? 'text-sm'
						: '[&>svg]:text-muted-foreground flex h-8 items-center gap-1 rounded-md pl-2 pr-1 text-sm [&>svg]:size-3.5',
					defaultClassNames.caption_label
				),
				table: 'w-full border-collapse',
				weekdays: cn('flex', defaultClassNames.weekdays),
				weekday: cn(
					'text-muted-foreground flex-1 select-none rounded-md text-[0.8rem] font-normal',
					defaultClassNames.weekday
				),
				week: cn('mt-2 flex w-full', defaultClassNames.week),
				week_number_header: cn('w-[--cell-size] select-none', defaultClassNames.week_number_header),
				week_number: cn('text-muted-foreground select-none text-[0.8rem]', defaultClassNames.week_number),
				day: cn(
					'group/day relative aspect-square h-full w-full select-none p-0 text-center [&:first-child[data-selected=true]_button]:rounded-l-md [&:last-child[data-selected=true]_button]:rounded-r-md',
					defaultClassNames.day
				),
				range_start: cn('bg-accent rounded-l-md', defaultClassNames.range_start),
				range_middle: cn('rounded-none', defaultClassNames.range_middle),
				range_end: cn('bg-accent rounded-r-md', defaultClassNames.range_end),
				today: cn(
					'bg-accent text-accent-foreground rounded-md data-[selected=true]:rounded-none',
					defaultClassNames.today
				),
				outside: cn('text-muted-foreground aria-selected:text-muted-foreground', defaultClassNames.outside),
				disabled: cn('text-muted-foreground opacity-50', defaultClassNames.disabled),
				hidden: cn('invisible', defaultClassNames.hidden),
				...classNames,
			}}
			components={{
				Root: ({ className, rootRef, ...props }) => {
					return <div data-slot='calendar' ref={rootRef} className={cn(className)} {...props} />;
				},
				Chevron: ({ className, orientation, ...props }) => {
					if (orientation === 'left') {
						return <ChevronLeftIcon className={cn('size-4', className)} {...props} />;
					}

					if (orientation === 'right') {
						return <ChevronRightIcon className={cn('size-4', className)} {...props} />;
					}

					return <ChevronDownIcon className={cn('size-4', className)} {...props} />;
				},
				DayButton: CalendarDayButton,
				WeekNumber: ({ children, ...props }) => {
					return (
						<td {...props}>
							<div className='flex size-[--cell-size] items-center justify-center text-center'>
								{children}
							</div>
						</td>
					);
				},
				...components,
			}}
			{...props}
		/>
	);
}

function CalendarDayButton({ className, day, modifiers, ...props }: React.ComponentProps<typeof DayButton>) {
	const defaultClassNames = getDefaultClassNames();

	const ref = React.useRef<HTMLButtonElement>(null);
	React.useEffect(() => {
		if (modifiers.focused) ref.current?.focus();
	}, [modifiers.focused]);

	return (
		<Button
			ref={ref}
			variant='ghost'
			size='icon'
			data-day={day.date.toLocaleDateString('en-IE')}
			data-selected-single={
				modifiers.selected && !modifiers.range_start && !modifiers.range_end && !modifiers.range_middle
			}
			data-range-start={modifiers.range_start}
			data-range-end={modifiers.range_end}
			data-range-middle={modifiers.range_middle}
			className={cn(
				'data-[selected-single=true]:bg-primary data-[selected-single=true]:text-primary-foreground data-[range-middle=true]:bg-accent data-[range-middle=true]:text-accent-foreground data-[range-start=true]:bg-primary data-[range-start=true]:text-primary-foreground data-[range-end=true]:bg-primary data-[range-end=true]:text-primary-foreground group-data-[focused=true]/day:border-ring group-data-[focused=true]/day:ring-ring/50 flex aspect-square h-auto w-full min-w-[--cell-size] flex-col gap-1 font-normal leading-none data-[range-end=true]:rounded-md data-[range-middle=true]:rounded-none data-[range-start=true]:rounded-md group-data-[focused=true]/day:relative group-data-[focused=true]/day:z-10 group-data-[focused=true]/day:ring-[3px] [&>span]:text-xs [&>span]:opacity-70',
				defaultClassNames.day,
				className
			)}
			{...props}
		/>
	);
}

export { Calendar, CalendarDayButton };