"use client"

import { cx } from "class-variance-authority"
import { Button } from "react-aria-components"
import { useWatch } from "react-hook-form"
import { useIntl } from "react-intl"

import { shortDateFormat } from "@scandic-hotels/common/constants/dateFormats"
import { dt } from "@scandic-hotels/common/dt"
import { Divider } from "@scandic-hotels/design-system/Divider"
import { MaterialIcon } from "@scandic-hotels/design-system/Icons/MaterialIcon"
import SkeletonShimmer from "@scandic-hotels/design-system/SkeletonShimmer"
import { Typography } from "@scandic-hotels/design-system/Typography"

import useLang from "../../../hooks/useLang"

import styles from "./button.module.css"

import type { BookingWidgetSchema } from "../Client"

type BookingWidgetToggleButtonProps = {
  openMobileSearch: () => void
}
export default function MobileToggleButton({
  openMobileSearch,
}: BookingWidgetToggleButtonProps) {
  const intl = useIntl()
  const lang = useLang()
  const date = useWatch<BookingWidgetSchema, "date">({ name: "date" })
  const rooms = useWatch<BookingWidgetSchema, "rooms">({ name: "rooms" })
  const searchTerm = useWatch<BookingWidgetSchema, "search">({ name: "search" })
  const selectedSearchTerm = useWatch<BookingWidgetSchema, "selectedSearch">({
    name: "selectedSearch",
  })

  const selectedFromDate = dt(date.fromDate)
    .locale(lang)
    .format(shortDateFormat[lang])
  const selectedToDate = dt(date.toDate)
    .locale(lang)
    .format(shortDateFormat[lang])

  const locationAndDateIsSet = searchTerm && date

  const totalNights = dt(date.toDate).diff(dt(date.fromDate), "days")
  const totalRooms = rooms.length
  const totalAdults = rooms.reduce((acc, room) => {
    if (room.adults) {
      acc = acc + room.adults
    }
    return acc
  }, 0)
  const totalChildren = rooms.reduce((acc, room) => {
    if (room.childrenInRoom) {
      acc = acc + room.childrenInRoom.length
    }
    return acc
  }, 0)

  const totalNightsMsg = intl.formatMessage(
    {
      id: "booking.numberOfNights",
      defaultMessage: "{totalNights, plural, one {# night} other {# nights}}",
    },
    { totalNights }
  )

  const totalAdultsMsg = intl.formatMessage(
    {
      id: "booking.numberOfAdults",
      defaultMessage: "{adults, plural, one {# adult} other {# adults}}",
    },
    { adults: totalAdults }
  )

  const totalChildrenMsg = intl.formatMessage(
    {
      id: "booking.numberOfChildren",
      defaultMessage: "{children, plural, one {# child} other {# children}}",
    },
    { children: totalChildren }
  )

  const totalRoomsMsg = intl.formatMessage(
    {
      id: "booking.numberOfRooms",
      defaultMessage: "{totalRooms, plural, one {# room} other {# rooms}}",
    },
    { totalRooms }
  )

  const totalDetails = [totalAdultsMsg]
  if (totalChildren > 0) {
    totalDetails.push(totalChildrenMsg)
  }
  totalDetails.push(totalRoomsMsg)

  return (
    <Button
      className={cx(
        styles.mobileToggleButton,
        locationAndDateIsSet ? styles.complete : styles.partial
      )}
      onPress={openMobileSearch}
    >
      {!locationAndDateIsSet && (
        <>
          <span className={styles.block}>
            <Typography variant="Body/Supporting text (caption)/smBold">
              <span className={styles.blockLabel}>
                {intl.formatMessage({
                  id: "bookingWidget.label.whereTo",
                  defaultMessage: "Where to?",
                })}
              </span>
            </Typography>
            <Typography variant="Body/Paragraph/mdRegular">
              <span className={styles.placeholder}>
                {searchTerm
                  ? searchTerm
                  : intl.formatMessage({
                      id: "bookingWidget.label.destination",
                      defaultMessage: "Destination",
                    })}
              </span>
            </Typography>
          </span>
          {/* Button can't contain HR elements */}
          <Divider color="Border/Divider/Subtle" variant="vertical" />
          <span className={styles.block}>
            <Typography variant="Body/Supporting text (caption)/smBold">
              <span className={styles.blockLabel}>{totalNightsMsg}</span>
            </Typography>
            <Typography variant="Body/Paragraph/mdRegular">
              <span className={styles.placeholder}>
                {intl.formatMessage(
                  {
                    id: "booking.selectedDateRange",
                    defaultMessage: "{selectedFromDate} – {selectedToDate}",
                  },
                  {
                    selectedFromDate,
                    selectedToDate,
                  }
                )}
              </span>
            </Typography>
          </span>
          <span className={styles.icon}>
            <MaterialIcon icon="search" color="Icon/Inverted" />
          </span>
        </>
      )}

      {locationAndDateIsSet && (
        <>
          <span className={styles.block}>
            <Typography variant="Body/Supporting text (caption)/smBold">
              <span className={styles.blockLabel}>{selectedSearchTerm}</span>
            </Typography>
            <Typography variant="Body/Supporting text (caption)/smRegular">
              <span className={styles.locationAndDate}>
                {intl.formatMessage(
                  {
                    id: "bookingWidget.mobile.selectedSummary",
                    defaultMessage:
                      "{selectedFromDate} – {selectedToDate} ({totalNights}) {details}",
                  },
                  {
                    selectedFromDate,
                    selectedToDate,
                    totalNights: totalNightsMsg,
                    details: totalDetails.join(", "),
                  }
                )}
              </span>
            </Typography>
          </span>
          <span className={styles.icon}>
            <MaterialIcon icon="edit_square" color="Icon/Inverted" />
          </span>
        </>
      )}
    </Button>
  )
}

export function MobileToggleButtonSkeleton() {
  const intl = useIntl()

  return (
    <div className={cx(styles.mobileToggleButton, styles.partial)}>
      <span className={styles.block}>
        <Typography variant="Body/Supporting text (caption)/smBold">
          <span className={styles.blockLabel}>
            {intl.formatMessage({
              id: "bookingWidget.label.whereTo",
              defaultMessage: "Where to?",
            })}
          </span>
        </Typography>
        <SkeletonShimmer display="block" height="20px" width="11ch" />
      </span>
      <Divider color="Border/Divider/Subtle" variant="vertical" />
      <span className={styles.block}>
        <Typography variant="Body/Supporting text (caption)/smBold">
          <span className={styles.blockLabel}>
            {intl.formatMessage(
              {
                id: "booking.numberOfNights",
                defaultMessage:
                  "{totalNights, plural, one {# night} other {# nights}}",
              },
              { totalNights: 0 }
            )}
          </span>
        </Typography>
        <SkeletonShimmer display="block" height="20px" width="13ch" />
      </span>
      <span className={styles.icon}>
        <MaterialIcon icon="search" color="Icon/Inverted" />
      </span>
    </div>
  )
}