"use client"

import {
  CalendarDate,
  CalendarDateTime,
  getLocalTimeZone,
} from "@internationalized/date"
import { CalendarMini, Clock, XMarkMini } from "@medusajs/icons"
import { cva } from "cva"
import * as React from "react"
import {
  DateValue,
  TimeValue,
  useDatePicker,
  useInteractOutside,
  type AriaDatePickerProps as BaseDatePickerProps,
} from "react-aria"
import { useDatePickerState } from "react-stately"

import { InternalCalendar } from "@/components/calendar"
import { Popover } from "@/components/popover"
import { TimeInput } from "@/components/time-input"
import { Granularity } from "@/types"
import {
  createCalendarDateFromDate,
  getDefaultCalendarDateFromDate,
  updateCalendarDateFromDate,
} from "@/utils/calendar"
import { clx } from "@/utils/clx"

import { DatePickerButton } from "./date-picker-button"
import { DatePickerClearButton } from "./date-picker-clear-button"
import { DatePickerField } from "./date-picker-field"

type DatePickerValueProps = {
  defaultValue?: Date | null
  value?: Date | null
  onChange?: (value: Date | null) => void
  isDateUnavailable?: (date: Date) => boolean
  minValue?: Date
  maxValue?: Date
  shouldCloseOnSelect?: boolean
  granularity?: Granularity
  size?: "base" | "small"
  className?: string
  modal?: boolean
}

interface DatePickerProps
  extends Omit<
      BaseDatePickerProps<CalendarDateTime | CalendarDate>,
      keyof DatePickerValueProps
    >,
    DatePickerValueProps {}

const datePickerStyles = (
  isOpen: boolean,
  isInvalid: boolean,
  value?: DateValue | null
) =>
  cva({
    base: clx(
      "bg-ui-bg-field shadow-borders-base txt-compact-small text-ui-fg-base transition-fg grid items-center gap-2 overflow-hidden rounded-md h-fit",
      "focus-within:shadow-borders-interactive-with-active focus-visible:shadow-borders-interactive-with-active",
      "aria-[invalid=true]:shadow-borders-error invalid:shadow-borders-error",
      {
        "shadow-borders-interactive-with-active": isOpen,
        "shadow-borders-error": isInvalid,
        "pr-2": !value,
      }
    ),
    variants: {
      size: {
        small: clx("grid-cols-[28px_1fr]", {
          "grid-cols-[28px_1fr_28px]": !!value,
        }),
        base: clx("grid-cols-[32px_1fr]", {
          "grid-cols-[32px_1fr_32px]": !!value,
        }),
      },
    },
  })

const HAS_TIME = new Set<Granularity>(["hour", "minute", "second"])

const DatePicker = React.forwardRef<HTMLDivElement, DatePickerProps>(
  (
    {
      size = "base",
      shouldCloseOnSelect = true,
      className,
      modal = false,
      ...props
    },
    ref
  ) => {
    const [value, setValue] = React.useState<
      CalendarDateTime | CalendarDate | null | undefined
    >(
      getDefaultCalendarDateFromDate(
        props.value,
        props.defaultValue,
        props.granularity
      )
    )

    const innerRef = React.useRef<HTMLDivElement>(null)
    React.useImperativeHandle(ref, () => innerRef.current as HTMLDivElement)

    const contentRef = React.useRef<HTMLDivElement>(null)

    const _props = convertProps(props, setValue)

    const state = useDatePickerState({
      ..._props,
      shouldCloseOnSelect,
    })

    const { groupProps, fieldProps, buttonProps, dialogProps, calendarProps } =
      useDatePicker(_props, state, innerRef)

    React.useEffect(() => {
      setValue(
        props.value
          ? updateCalendarDateFromDate(value, props.value, props.granularity)
          : null
      )
      state.setValue(
        props.value
          ? updateCalendarDateFromDate(value, props.value, props.granularity)
          : null
      )
    }, [props.value])

    function clear(e: React.MouseEvent<HTMLButtonElement>) {
      e.preventDefault()
      e.stopPropagation()

      props.onChange?.(null)
      state.setValue(null)
    }

    useInteractOutside({
      ref: contentRef,
      onInteractOutside: () => {
        state.setOpen(false)
      },
    })

    const hasTime = props.granularity && HAS_TIME.has(props.granularity)
    const Icon = hasTime ? Clock : CalendarMini

    return (
      <Popover modal={modal} open={state.isOpen} onOpenChange={state.setOpen}>
        <Popover.Anchor asChild>
          <div
            ref={ref}
            className={clx(
              datePickerStyles(
                state.isOpen,
                state.isInvalid,
                state.value
              )({ size }),
              className
            )}
            {...groupProps}
          >
            <DatePickerButton {...buttonProps} size={size}>
              <Icon />
            </DatePickerButton>
            <DatePickerField {...fieldProps} size={size} />
            {!!state.value && (
              <DatePickerClearButton onClick={clear}>
                <XMarkMini />
              </DatePickerClearButton>
            )}
          </div>
        </Popover.Anchor>
        <Popover.Content
          ref={contentRef}
          {...dialogProps}
          className="flex flex-col divide-y p-0"
        >
          <div className="p-3">
            <InternalCalendar autoFocus {...calendarProps} />
          </div>
          {state.hasTime && (
            <div className="p-3">
              <TimeInput
                value={state.timeValue}
                onChange={(value) => state.setTimeValue(value as TimeValue)}
                hourCycle={props.hourCycle}
              />
            </div>
          )}
        </Popover.Content>
      </Popover>
    )
  }
)
DatePicker.displayName = "DatePicker"

function convertProps(
  props: DatePickerProps,
  setValue: React.Dispatch<
    React.SetStateAction<CalendarDateTime | CalendarDate | null | undefined>
  >
): BaseDatePickerProps<CalendarDateTime | CalendarDate> {
  const {
    minValue,
    maxValue,
    isDateUnavailable: _isDateUnavailable,
    onChange: _onChange,
    value: __value__,
    defaultValue: __defaultValue__,
    ...rest
  } = props

  const onChange = (value: CalendarDateTime | CalendarDateTime | null) => {
    setValue(value)
    _onChange?.(value ? value.toDate(getLocalTimeZone()) : null)
  }

  const isDateUnavailable = (date: DateValue) => {
    const _date = date.toDate(getLocalTimeZone())

    return _isDateUnavailable ? _isDateUnavailable(_date) : false
  }

  return {
    ...rest,
    onChange: onChange as BaseDatePickerProps<
      CalendarDateTime | CalendarDate
    >["onChange"],
    isDateUnavailable,
    minValue: minValue
      ? createCalendarDateFromDate(minValue, props.granularity)
      : minValue,
    maxValue: maxValue
      ? createCalendarDateFromDate(maxValue, props.granularity)
      : maxValue,
  }
}

export { DatePicker, type Granularity }