import type { FC } from 'react'
import { cn } from '@langgenius/dify-ui/cn'
import { RiAlertFill } from '@remixicon/react'
import { camelCase } from 'es-toolkit/string'
import * as React from 'react'
import { useMemo } from 'react'
import { Trans } from 'react-i18next'
import { useTranslation } from '#i18n'
import Link from '@/next/link'

type DeprecationNoticeProps = {
  status: 'deleted' | 'active'
  deprecatedReason: string
  alternativePluginId: string
  alternativePluginURL: string
  className?: string
  innerWrapperClassName?: string
  iconWrapperClassName?: string
  textClassName?: string
}

const i18nPrefix = 'detailPanel.deprecation'

type DeprecatedReasonKey = 'businessAdjustments' | 'ownershipTransferred' | 'noMaintainer'
const validReasonKeys: DeprecatedReasonKey[] = [
  'businessAdjustments',
  'ownershipTransferred',
  'noMaintainer',
]

function isValidReasonKey(key: string): key is DeprecatedReasonKey {
  return (validReasonKeys as string[]).includes(key)
}

const DeprecationNotice: FC<DeprecationNoticeProps> = ({
  status,
  deprecatedReason,
  alternativePluginId,
  alternativePluginURL,
  className,
  innerWrapperClassName,
  iconWrapperClassName,
  textClassName,
}) => {
  const { t } = useTranslation('plugin')

  const deprecatedReasonKey = useMemo(() => {
    if (!deprecatedReason) return null
    const key = camelCase(deprecatedReason)
    if (isValidReasonKey(key)) return key
    return null
  }, [deprecatedReason])

  // Check if the deprecatedReasonKey exists in i18n
  const hasValidDeprecatedReason = deprecatedReasonKey !== null

  if (status !== 'deleted') return null

  return (
    <div className={cn('w-full', className)}>
      <div
        className={cn(
          'relative flex items-start gap-x-0.5 overflow-hidden rounded-xl border-[0.5px] border-components-panel-border bg-components-panel-bg-blur p-2 shadow-xs shadow-shadow-shadow-3 backdrop-blur-[5px]',
          innerWrapperClassName,
        )}
      >
        <div className="absolute top-0 left-0 -z-10 size-full bg-toast-warning-bg opacity-40" />
        <div
          className={cn('flex size-6 shrink-0 items-center justify-center', iconWrapperClassName)}
        >
          <RiAlertFill className="size-4 text-text-warning-secondary" />
        </div>
        <div className={cn('grow py-1 system-xs-regular text-text-primary', textClassName)}>
          {hasValidDeprecatedReason && alternativePluginId && (
            <Trans
              t={t}
              i18nKey={($) => $[`${i18nPrefix}.fullMessage`]}
              ns="plugin"
              components={{
                CustomLink: (
                  <Link
                    href={alternativePluginURL}
                    target="_blank"
                    rel="noopener noreferrer"
                    className="underline"
                  />
                ),
              }}
              values={{
                deprecatedReason: deprecatedReasonKey
                  ? t(($) => $[`${i18nPrefix}.reason.${deprecatedReasonKey}`], { ns: 'plugin' })
                  : '',
                alternativePluginId,
              }}
            />
          )}
          {hasValidDeprecatedReason && !alternativePluginId && (
            <span>
              {t(($) => $[`${i18nPrefix}.onlyReason`], {
                ns: 'plugin',
                deprecatedReason: deprecatedReasonKey
                  ? t(($) => $[`${i18nPrefix}.reason.${deprecatedReasonKey}`], { ns: 'plugin' })
                  : '',
              })}
            </span>
          )}
          {!hasValidDeprecatedReason && (
            <span>{t(($) => $[`${i18nPrefix}.noReason`], { ns: 'plugin' })}</span>
          )}
        </div>
      </div>
    </div>
  )
}

export default React.memo(DeprecationNotice)