import React, { MouseEventHandler } from 'react'
import ReactSelect, {
	components,
	MultiValueProps,
	MultiValueRemoveProps,
	OptionProps,
} from 'react-select'
import { closestCenter, DndContext, DragEndEvent } from '@dnd-kit/core'
import { restrictToParentElement } from '@dnd-kit/modifiers'
import {
	arrayMove,
	horizontalListSortingStrategy,
	SortableContext,
	useSortable,
} from '@dnd-kit/sortable'
import { CSS } from '@dnd-kit/utilities'

const MultiValue = (props: MultiValueProps<Option>) => {
	const onMouseDown: MouseEventHandler<HTMLDivElement> = (e) => {
		e.preventDefault()
		e.stopPropagation()
	}
	const innerProps = { ...props.innerProps, onMouseDown }
	const { attributes, listeners, setNodeRef, transform, transition } = useSortable({
		id: props.data.value,
	})
	const style = {
		transform: CSS.Transform.toString(transform),
		transition,
	}

	return (
		<div style={style} ref={setNodeRef} {...attributes} {...listeners}>
			<components.MultiValue {...props} innerProps={innerProps} />
		</div>
	)
}

const MultiValueRemove = (props: MultiValueRemoveProps<Option>) => {
	return (
		<components.MultiValueRemove
			{...props}
			innerProps={{
				onPointerDown: (e) => e.stopPropagation(),
				...props.innerProps,
			}}
		/>
	)
}

const Option = ({ ...props }: OptionProps<Option>) => {
	return (
		<components.Option {...props}>
			<div className='flex flex-col'>
				<span>{props.data.label}</span>
				<span className='text-sm font-light opacity-90'>{props.data.description}</span>
			</div>
		</components.Option>
	)
}

const Select: React.FC<SelectProps> = ({
	placeholder,
	options,
	values,
	setValues,
	handleChange,
	handleTouch,
}) => {
	const onSortEnd = (event: DragEndEvent) => {
		const { active, over } = event
		const newValue = arrayMove(
			values,
			values.findIndex((i) => i === active.id),
			values.findIndex((i) => i === over.id)
		)
		setValues(newValue)
	}
	return (
		<DndContext
			modifiers={[restrictToParentElement]}
			onDragEnd={onSortEnd}
			collisionDetection={closestCenter}
		>
			<SortableContext items={values} strategy={horizontalListSortingStrategy}>
				<ReactSelect
					styles={{
						placeholder: (provided) => {
							return { ...provided, position: 'absolute' }
						},
						control: (provided) => {
							return { ...provided, border: 'none' }
						},
						option: (provided) => {
							return {
								...provided,
								cursor: 'pointer',
								':hover': {
									opacity: '0.7',
								},
							}
						},
					}}
					isMulti
					className='border-grey-light rounded border dark:border-transparent'
					classNamePrefix='outline-none text-black dark:bg-very-black dark:text-white cursor-pointer '
					placeholder={placeholder || '선택해주세요.'}
					options={options}
					onChange={handleChange}
					onBlur={handleTouch}
					noOptionsMessage={() => '검색 결과가 없습니다.'}
					value={values.map((el) => ({ label: el, value: el }))}
					components={{
						MultiValue,
						MultiValueRemove,
						Option,
					}}
					closeMenuOnSelect={false}
				/>
			</SortableContext>
		</DndContext>
	)
}

interface SelectProps {
	placeholder?: string
	options: Option[]
	values: string[]
	setValues: (value: string[]) => void
	handleChange: (value: Option[]) => void
	handleTouch: () => void
}

interface Option {
	value: string
	label: string
	description?: string
}

export default Select