import type { FC } from 'react'
import {
  AlertDialog,
  AlertDialogContent,
  AlertDialogDescription,
  AlertDialogTitle,
} from '@langgenius/dify-ui/alert-dialog'
import { Button } from '@langgenius/dify-ui/button'
import { RiLoader2Line } from '@remixicon/react'
import { useCountDown } from 'ahooks'
import * as React from 'react'
import { useRef, useState } from 'react'
import { useTranslation } from 'react-i18next'
import { useEventEmitterContextContext } from '@/context/event-emitter'

type IDefaultContentProps = {
  onCancel: () => void
  onConfirm: () => void
}

const DefaultContent: FC<IDefaultContentProps> = React.memo(({
  onCancel,
  onConfirm,
}) => {
  const { t } = useTranslation()

  return (
    <>
      <div className="pb-4">
        <AlertDialogTitle className="title-2xl-semi-bold text-text-primary">{t('segment.regenerationConfirmTitle', { ns: 'datasetDocuments' })}</AlertDialogTitle>
        <AlertDialogDescription className="system-md-regular text-text-secondary">{t('segment.regenerationConfirmMessage', { ns: 'datasetDocuments' })}</AlertDialogDescription>
      </div>
      <div className="flex justify-end gap-x-2 pt-6">
        <Button onClick={onCancel}>
          {t('operation.cancel', { ns: 'common' })}
        </Button>
        <Button variant="primary" tone="destructive" onClick={onConfirm}>
          {t('operation.regenerate', { ns: 'common' })}
        </Button>
      </div>
    </>
  )
})

DefaultContent.displayName = 'DefaultContent'

const RegeneratingContent: FC = React.memo(() => {
  const { t } = useTranslation()

  return (
    <>
      <div className="pb-4">
        <span className="title-2xl-semi-bold text-text-primary">{t('segment.regeneratingTitle', { ns: 'datasetDocuments' })}</span>
        <p className="system-md-regular text-text-secondary">{t('segment.regeneratingMessage', { ns: 'datasetDocuments' })}</p>
      </div>
      <div className="flex justify-end pt-6">
        <Button variant="primary" tone="destructive" disabled className="inline-flex items-center gap-x-0.5">
          <RiLoader2Line className="size-4 animate-spin text-components-button-destructive-primary-text-disabled" />
          <span>{t('operation.regenerate', { ns: 'common' })}</span>
        </Button>
      </div>
    </>
  )
})

RegeneratingContent.displayName = 'RegeneratingContent'

type IRegenerationCompletedContentProps = {
  onClose: () => void
}

const RegenerationCompletedContent: FC<IRegenerationCompletedContentProps> = React.memo(({
  onClose,
}) => {
  const { t } = useTranslation()
  const targetTime = useRef(Date.now() + 5000)
  const [countdown] = useCountDown({
    targetDate: targetTime.current,
    onEnd: () => {
      onClose()
    },
  })

  return (
    <>
      <div className="pb-4">
        <span className="title-2xl-semi-bold text-text-primary">{t('segment.regenerationSuccessTitle', { ns: 'datasetDocuments' })}</span>
        <p className="system-md-regular text-text-secondary">{t('segment.regenerationSuccessMessage', { ns: 'datasetDocuments' })}</p>
      </div>
      <div className="flex justify-end pt-6">
        <Button variant="primary" onClick={onClose}>
          {`${t('operation.close', { ns: 'common' })}${countdown === 0 ? '' : `(${Math.round(countdown / 1000)})`}`}
        </Button>
      </div>
    </>
  )
})

RegenerationCompletedContent.displayName = 'RegenerationCompletedContent'

type IRegenerationModalProps = {
  isShow: boolean
  onConfirm: () => void
  onCancel: () => void
  onClose: () => void
}

const RegenerationModal: FC<IRegenerationModalProps> = ({
  isShow,
  onConfirm,
  onCancel,
  onClose,
}) => {
  const [loading, setLoading] = useState(false)
  const [updateSucceeded, setUpdateSucceeded] = useState(false)
  const { eventEmitter } = useEventEmitterContextContext()

  eventEmitter?.useSubscription((v) => {
    if (v === 'update-segment') {
      setLoading(true)
      setUpdateSucceeded(false)
    }
    if (v === 'update-segment-success')
      setUpdateSucceeded(true)
    if (v === 'update-segment-done')
      setLoading(false)
  })

  return (
    <AlertDialog open={isShow}>
      <AlertDialogContent className="w-[calc(100vw-2rem)] max-w-[480px]! overflow-hidden! rounded-2xl! border-none p-6 text-left align-middle shadow-xl">
        {!loading && !updateSucceeded && <DefaultContent onCancel={onCancel} onConfirm={onConfirm} />}
        {loading && !updateSucceeded && <RegeneratingContent />}
        {!loading && updateSucceeded && <RegenerationCompletedContent onClose={onClose} />}
      </AlertDialogContent>
    </AlertDialog>
  )
}

export default RegenerationModal
