"use client"

import Link from "next/link"
import { useParams } from "next/navigation"
import { useContext, useState } from "react"
import {
  I18nProvider,
  Slider,
  SliderOutput,
  SliderStateContext,
  SliderThumb,
  SliderTrack,
  TextField,
} from "react-aria-components"
import { FormProvider, useForm } from "react-hook-form"
import { useIntl } from "react-intl"

import { MaterialIcon } from "@scandic-hotels/design-system/Icons/MaterialIcon"
import { Input } from "@scandic-hotels/design-system/Input"
import { Typography } from "@scandic-hotels/design-system/Typography"

import { SAS_TRANSFER_POINT_KEY } from "@/app/[lang]/(partner)/(sas)/(protected)/sas-x-scandic/sasUtils"
import Image from "@/components/Image"
import Modal from "@/components/Modal"
import Button from "@/components/TempDesignSystem/Button"

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

import type { LangParams } from "@/types/params"
import type { Lang } from "@/constants/languages"

type TransferPointsFormClientProps = {
  sasPoints: number | null
  exchangeRate: number | null
  lang: Lang
}

export function TransferPointsFormClient({
  sasPoints,
  exchangeRate,
  lang,
}: TransferPointsFormClientProps) {
  const intl = useIntl()
  const formMethods = useForm()
  const [pointState, setPointState] = useState<number | null>(0)
  const selectedPoints = pointState ?? 0

  const disabled = !exchangeRate

  const parsedPoints = Math.min(selectedPoints, sasPoints ?? 0)

  const calculatedPoints = parsedPoints * (exchangeRate ?? 0)

  const handleUpdatePoints = (points: number | null) => {
    setPointState(points)
  }

  const hasNoSasPoints = !sasPoints || sasPoints === 0

  return (
    <FormProvider {...formMethods}>
      <I18nProvider locale={lang}>
        <Slider
          value={parsedPoints}
          onChange={handleUpdatePoints}
          className={styles.slider}
          // Set max value to 1 if sasPoints is 0 since slider requires a range
          maxValue={hasNoSasPoints ? 1 : sasPoints}
          aria-label={intl.formatMessage({
            defaultMessage: "EB points to transfer",
          })}
          formatOptions={{
            useGrouping: true,
            maximumFractionDigits: 0,
          }}
          isDisabled={disabled || hasNoSasPoints}
        >
          <SliderTrack className={styles.sliderTrack}>
            <SliderFill />
            <SliderThumb className={styles.sliderThumb}>
              <SliderOutput className={styles.sliderOutput} />
              <MaterialIcon icon="swipe" color="Icon/Inverted" />
            </SliderThumb>
          </SliderTrack>
        </Slider>
      </I18nProvider>
      <div className={styles.inputsWrapper}>
        <TextField type="number" isDisabled={disabled}>
          <Input
            label={intl.formatMessage({
              defaultMessage: "EB points to transfer",
            })}
            type="number"
            min={0}
            value={pointState ?? ""}
            className={styles.pointsInput}
            disabled={disabled}
            onChange={(e) => {
              const value = parseInt(e.target.value, 10)

              handleUpdatePoints(isNaN(value) ? null : value)
            }}
            onBlur={() => {
              handleUpdatePoints(parsedPoints)
            }}
          />
        </TextField>
        <Typography variant="Body/Supporting text (caption)/smRegular">
          <p className={styles.conversionRate}>
            {/* TODO maybe dynamic string based on exchange rate */}
            {intl.formatMessage({
              defaultMessage: "1 EuroBonus point = 2 Scandic Friends points",
            })}
          </p>
        </Typography>
        <div className={styles.pointsOutput}>
          <Typography variant="Label/xsRegular">
            <p>
              {intl.formatMessage({
                defaultMessage: "SF points to receive",
              })}
            </p>
          </Typography>
          <Typography variant="Body/Paragraph/mdRegular">
            <p>{intl.formatNumber(calculatedPoints)}</p>
          </Typography>
        </div>
      </div>
      <ConfirmModal
        disabled={disabled || calculatedPoints === 0}
        sasPoints={parsedPoints}
        scandicPoints={calculatedPoints}
      />
    </FormProvider>
  )
}

function SliderFill() {
  const state = useContext(SliderStateContext)!

  return (
    <div
      style={{
        width: `${state.getThumbPercent(0) * 100}%`,
      }}
      className={styles.sliderFill}
    />
  )
}

type ConfirmModalProps = {
  sasPoints: number
  scandicPoints: number
  disabled?: boolean
}

function ConfirmModal({
  sasPoints,
  scandicPoints,
  disabled,
}: ConfirmModalProps) {
  const { lang } = useParams<LangParams>()
  const [isOpen, setIsOpen] = useState(false)
  const intl = useIntl()

  const handleToggle = (open: boolean) => {
    setIsOpen(open)
    if (open) {
      const expireIn15Minutes = new Date(
        Date.now() + 15 * 60 * 1000
      ).toUTCString()
      document.cookie = `${SAS_TRANSFER_POINT_KEY}=${JSON.stringify(sasPoints)};path=/;expires=${expireIn15Minutes}`
    } else {
      document.cookie = `${SAS_TRANSFER_POINT_KEY}=;path=/;expires=Thu, 01 Jan 1970 00:00:01 GMT`
    }
  }

  return (
    <>
      <Button
        className={styles.transferButton}
        onClick={() => handleToggle(true)}
        disabled={disabled}
      >
        {intl.formatMessage({
          defaultMessage: "Transfer points",
        })}
      </Button>
      <Modal isOpen={isOpen} onToggle={handleToggle}>
        <div className={styles.modalContainer}>
          <Image
            src="/_static/img/scandic-money-hand.svg"
            alt=""
            width="133"
            height="119"
          />
          <Typography variant="Title/Subtitle/lg">
            <h3>
              {intl.formatMessage({
                defaultMessage: "Proceed with point transfer?",
              })}
            </h3>
          </Typography>
          <div>
            <Typography variant="Body/Paragraph/mdRegular">
              <p>
                {intl.formatMessage({
                  defaultMessage: "You are about to exchange:",
                })}
              </p>
            </Typography>
            <Typography variant="Body/Paragraph/mdRegular">
              <p>
                {intl.formatMessage(
                  {
                    defaultMessage:
                      "<bold>{sasPoints, number} EuroBonus points</bold> to <bold>{scandicPoints, number} Scandic Friends points</bold>",
                  },
                  {
                    sasPoints,
                    scandicPoints,
                    bold: (text) => (
                      <Typography variant="Body/Paragraph/mdBold">
                        <span>{text}</span>
                      </Typography>
                    ),
                  }
                )}
              </p>
            </Typography>
          </div>
          <Typography variant="Body/Supporting text (caption)/smRegular">
            <p className={styles.expiryText}>
              {intl.formatMessage({
                defaultMessage:
                  "Your exchanged points will retain their original expiry date with a maximum validity of 12 months.",
              })}
            </p>
          </Typography>
          <div className={styles.divider} />
          <div className={styles.buttonContainer}>
            <Button asChild theme="base" fullWidth>
              <Link
                href={`/${lang}/sas-x-scandic/login?intent=transfer`}
                color="none"
              >
                {intl.formatMessage({
                  defaultMessage: "Yes, I want to transfer my points",
                })}
              </Link>
            </Button>
            <Button
              fullWidth
              intent="text"
              theme="base"
              onClick={() => handleToggle(false)}
            >
              {intl.formatMessage({
                defaultMessage: "Cancel",
              })}
            </Button>
          </div>
        </div>
      </Modal>
    </>
  )
}
