"use client"

import { useMemo } from "react"
import { useController } from "react-hook-form"
import { useIntl } from "react-intl"

import { Select } from "@scandic-hotels/design-system/Select"
import { countries } from "@scandic-hotels/trpc/constants/countries"

import useLang from "@/hooks/useLang"

import ErrorMessage from "../ErrorMessage"

import type { CountryProps } from "./country"

const prioCountryCode = ["DE", "DK", "FI", "NO", "SE"]

export default function CountrySelect({
  className = "",
  label,
  name = "country",
  readOnly = false,
  registerOptions = {},
}: CountryProps) {
  const lang = useLang()
  const intl = useIntl()

  const { field, formState, fieldState } = useController({
    name,
    rules: registerOptions,
  })

  const items = useMemo(() => {
    function mapCountry(country: (typeof countries)[number]) {
      return {
        value: country.code,
        label:
          intl.formatDisplayName(country.code, { type: "region" }) ||
          country.name,
      }
    }

    const collator = new Intl.Collator(lang)
    const prioCountries = countries
      .filter((c) => prioCountryCode.includes(c.code))
      .map(mapCountry)
      .sort((a, b) => collator.compare(a.label, b.label))

    const restCountries = countries
      .filter((c) => !prioCountryCode.includes(c.code))
      .map(mapCountry)
      .sort((a, b) => collator.compare(a.label, b.label))

    return [...prioCountries, ...restCountries]
  }, [intl, lang])

  return (
    <div className={className}>
      <Select
        items={items}
        label={label}
        isReadOnly={readOnly}
        isRequired={Boolean(registerOptions?.required)}
        isInvalid={fieldState.invalid}
        name={name}
        onBlur={field.onBlur}
        onSelectionChange={(c) => field.onChange(c ?? "")}
        selectedKey={field.value}
        data-testid={name}
      />
      <ErrorMessage errors={formState.errors} name={name} />
    </div>
  )
}