'use client'
import type { TFunction } from 'i18next'
import type { TriggerPluginActionPreviewPayload } from './trigger-plugin/action-item'
import type { TriggerDefaultValue, TriggerWithProvider } from './types'
import type { Plugin } from '@/app/components/plugins/types'
import type { Locale } from '@/i18n-config'
import { createPreviewCardHandle, PreviewCard, PreviewCardContent, PreviewCardTrigger } from '@langgenius/dify-ui/preview-card'
import { RiMoreLine } from '@remixicon/react'
import { useLocalStorage } from 'foxact/use-local-storage'
import { useEffect, useMemo, useState } from 'react'
import { useTranslation } from 'react-i18next'
import { ArrowDownDoubleLine, ArrowDownRoundFill, ArrowUpDoubleLine } from '@/app/components/base/icons/src/vender/solid/arrows'
import Loading from '@/app/components/base/loading'
import InstallFromMarketplace from '@/app/components/plugins/install-plugin/install-from-marketplace'
import Action from '@/app/components/workflow/block-selector/market-place-plugin/action'
import { useGetLanguage } from '@/context/i18n'
import Link from '@/next/link'
import { formatNumber } from '@/utils/format'
import { getMarketplaceUrl } from '@/utils/var'
import BlockIcon from '../block-icon'
import { BlockEnum } from '../types'
import { BlockSelectorRow } from './block-selector-row'
import { TriggerPluginActionPreviewCard } from './trigger-plugin/action-item'
import TriggerPluginItem from './trigger-plugin/item'

const MAX_RECOMMENDED_COUNT = 15
const INITIAL_VISIBLE_COUNT = 5

type FeaturedTriggersProps = {
  plugins: Plugin[]
  providerMap: Map<string, TriggerWithProvider>
  onSelect: (type: BlockEnum, trigger?: TriggerDefaultValue) => void
  isLoading?: boolean
  onInstallSuccess?: () => void | Promise<void>
}
type FeaturedTriggerPreviewPayload = {
  plugin: Plugin
  label: string
  description: string
}

const STORAGE_KEY = 'workflow_triggers_featured_collapsed'

const FeaturedTriggers = ({
  plugins,
  providerMap,
  onSelect,
  isLoading = false,
  onInstallSuccess,
}: FeaturedTriggersProps) => {
  const { t } = useTranslation()
  const language = useGetLanguage()
  const previewCardHandle = useMemo(() => createPreviewCardHandle<FeaturedTriggerPreviewPayload>(), [])
  const triggerActionPreviewCardHandle = useMemo(() => createPreviewCardHandle<TriggerPluginActionPreviewPayload>(), [])
  const [visibleCount, setVisibleCount] = useState(INITIAL_VISIBLE_COUNT)
  const [visibleCountPlugins, setVisibleCountPlugins] = useState(plugins)
  const [isCollapsed, setIsCollapsed] = useLocalStorage<boolean>(STORAGE_KEY, false)

  if (visibleCountPlugins !== plugins) {
    setVisibleCountPlugins(plugins)
    setVisibleCount(INITIAL_VISIBLE_COUNT)
  }

  const limitedPlugins = useMemo(
    () => plugins.slice(0, MAX_RECOMMENDED_COUNT),
    [plugins],
  )

  const {
    installedProviders,
    uninstalledPlugins,
  } = useMemo(() => {
    const installed: TriggerWithProvider[] = []
    const uninstalled: Plugin[] = []
    const visitedProviderIds = new Set<string>()

    limitedPlugins.forEach((plugin) => {
      const provider = providerMap.get(plugin.plugin_id) || providerMap.get(plugin.latest_package_identifier)
      if (provider) {
        if (!visitedProviderIds.has(provider.id)) {
          installed.push(provider)
          visitedProviderIds.add(provider.id)
        }
      }
      else {
        uninstalled.push(plugin)
      }
    })

    return {
      installedProviders: installed,
      uninstalledPlugins: uninstalled,
    }
  }, [limitedPlugins, providerMap])

  const totalQuota = Math.min(visibleCount, MAX_RECOMMENDED_COUNT)

  const visibleInstalledProviders = useMemo(
    () => installedProviders.slice(0, totalQuota),
    [installedProviders, totalQuota],
  )

  const remainingSlots = Math.max(totalQuota - visibleInstalledProviders.length, 0)

  const visibleUninstalledPlugins = useMemo(
    () => (remainingSlots > 0 ? uninstalledPlugins.slice(0, remainingSlots) : []),
    [uninstalledPlugins, remainingSlots],
  )

  const totalVisible = visibleInstalledProviders.length + visibleUninstalledPlugins.length
  const maxAvailable = Math.min(MAX_RECOMMENDED_COUNT, installedProviders.length + uninstalledPlugins.length)
  const hasMoreToShow = totalVisible < maxAvailable
  const canToggleVisibility = maxAvailable > INITIAL_VISIBLE_COUNT
  const isExpanded = canToggleVisibility && !hasMoreToShow
  const showEmptyState = !isLoading && totalVisible === 0

  return (
    <div className="pt-2 pb-3">
      <button
        type="button"
        className="flex w-full items-center rounded-md px-4 py-1 text-left text-text-primary"
        onClick={() => setIsCollapsed(prev => !prev)}
      >
        <span className="system-xs-medium text-text-primary">{t('tabs.featuredTools', { ns: 'workflow' })}</span>
        <ArrowDownRoundFill className={`ml-0.5 size-4 text-text-tertiary transition-transform ${isCollapsed ? '-rotate-90' : 'rotate-0'}`} />
      </button>

      {!isCollapsed && (
        <>
          {isLoading && (
            <div className="py-3">
              <Loading type="app" />
            </div>
          )}

          {showEmptyState && (
            <p className="px-4 py-2 system-xs-regular text-text-tertiary">
              <Link className="text-text-accent" href={getMarketplaceUrl('', { category: 'trigger' })} target="_blank" rel="noopener noreferrer">
                {t('tabs.noFeaturedTriggers', { ns: 'workflow' })}
              </Link>
            </p>
          )}

          {!showEmptyState && !isLoading && (
            <div className="mt-1 p-1">
              {visibleInstalledProviders.map(provider => (
                <TriggerPluginItem
                  key={provider.id}
                  payload={provider}
                  hasSearchText={false}
                  previewCardHandle={triggerActionPreviewCardHandle}
                  onSelect={onSelect}
                />
              ))}

              {visibleUninstalledPlugins.map(plugin => (
                <div key={plugin.plugin_id} className="mb-1 last-of-type:mb-0">
                  <FeaturedTriggerUninstalledItem
                    plugin={plugin}
                    language={language}
                    previewCardHandle={previewCardHandle}
                    onInstallSuccess={async () => {
                      await onInstallSuccess?.()
                    }}
                    t={t}
                  />
                </div>
              ))}
            </div>
          )}

          {!isLoading && totalVisible > 0 && canToggleVisibility && (
            <div
              className="group mt-1 flex cursor-pointer items-center gap-x-2 rounded-lg py-1 pr-2 pl-3 text-text-tertiary transition-colors hover:bg-state-base-hover hover:text-text-secondary"
              onClick={() => {
                setVisibleCount((count) => {
                  if (count >= maxAvailable)
                    return INITIAL_VISIBLE_COUNT

                  return Math.min(count + INITIAL_VISIBLE_COUNT, maxAvailable)
                })
              }}
            >
              <div className="flex items-center px-1 text-text-tertiary transition-colors group-hover:text-text-secondary">
                <RiMoreLine className="size-4 group-hover:hidden" />
                {isExpanded
                  ? (
                      <ArrowUpDoubleLine className="hidden size-4 group-hover:block" />
                    )
                  : (
                      <ArrowDownDoubleLine className="hidden size-4 group-hover:block" />
                    )}
              </div>
              <div className="system-xs-regular">
                {t(isExpanded ? 'tabs.showLessFeatured' : 'tabs.showMoreFeatured', { ns: 'workflow' })}
              </div>
            </div>
          )}
        </>
      )}
      <PreviewCard handle={previewCardHandle}>
        {({ payload }) => (
          <FeaturedTriggerPreviewCard payload={payload as FeaturedTriggerPreviewPayload | undefined} />
        )}
      </PreviewCard>
      <PreviewCard handle={triggerActionPreviewCardHandle}>
        {({ payload }) => (
          <TriggerPluginActionPreviewCard payload={payload as TriggerPluginActionPreviewPayload | undefined} />
        )}
      </PreviewCard>
    </div>
  )
}

type FeaturedTriggerUninstalledItemProps = {
  plugin: Plugin
  language: Locale
  previewCardHandle: ReturnType<typeof createPreviewCardHandle<FeaturedTriggerPreviewPayload>>
  onInstallSuccess?: () => Promise<void> | void
  t: TFunction
}

function FeaturedTriggerUninstalledItem({
  plugin,
  language,
  previewCardHandle,
  onInstallSuccess,
  t,
}: FeaturedTriggerUninstalledItemProps) {
  const label = plugin.label?.[language] || plugin.name
  const description = typeof plugin.brief === 'object' ? plugin.brief[language] : plugin.brief
  const installCountLabel = t('install', { ns: 'plugin', num: formatNumber(plugin.install_count || 0) })
  const [actionOpen, setActionOpen] = useState(false)
  const [isInstallModalOpen, setIsInstallModalOpen] = useState(false)

  useEffect(() => {
    if (!actionOpen)
      return

    const handleScroll = () => {
      setActionOpen(false)
    }

    window.addEventListener('scroll', handleScroll, true)

    return () => {
      window.removeEventListener('scroll', handleScroll, true)
    }
  }, [actionOpen])

  const row = (
    <BlockSelectorRow as="div" className="group select-none">
      <div className="flex min-w-0 items-center">
        <BlockIcon className="mr-2 shrink-0" type={BlockEnum.TriggerPlugin} size="sm" toolIcon={plugin.icon} />
        <div className="min-w-0">
          <div className="truncate system-sm-medium text-text-secondary">{label}</div>
        </div>
      </div>
      <div className="ml-auto flex h-6 items-center gap-1 pl-1">
        <span className={`system-xs-regular text-text-tertiary ${actionOpen ? 'hidden' : 'group-hover:hidden'}`}>{installCountLabel}</span>
        <div
          className={`flex h-full items-center gap-1 system-xs-medium text-components-button-secondary-accent-text [&_.action-btn]:size-6 [&_.action-btn]:min-h-0 [&_.action-btn]:rounded-lg [&_.action-btn]:p-0 ${actionOpen ? '' : 'hidden group-hover:flex'}`}
        >
          <button
            type="button"
            className="cursor-pointer rounded-md px-1.5 py-0.5 hover:bg-state-base-hover"
            onClick={() => {
              setActionOpen(false)
              setIsInstallModalOpen(true)
            }}
          >
            {t('installAction', { ns: 'plugin' })}
          </button>
          <Action
            open={actionOpen}
            onOpenChange={setActionOpen}
            author={plugin.org}
            name={plugin.name}
            version={plugin.latest_version}
          />
        </div>
      </div>
    </BlockSelectorRow>
  )

  return (
    <>
      {description
        ? (
            // Preview is supplementary: icon / label / brief are all reachable from
            // the InstallFromMarketplace modal that opens on click, so hover/focus-only
            // activation is a11y-safe. See packages/dify-ui/AGENTS.md → Overlay Primitive Selection.
            <PreviewCardTrigger
              delay={150}
              closeDelay={150}
              handle={previewCardHandle}
              payload={{ plugin, label, description }}
              render={row}
            />
          )
        : row}
      {isInstallModalOpen && (
        <InstallFromMarketplace
          uniqueIdentifier={plugin.latest_package_identifier}
          manifest={plugin}
          onSuccess={async () => {
            setIsInstallModalOpen(false)
            await onInstallSuccess?.()
          }}
          onClose={() => {
            setIsInstallModalOpen(false)
          }}
        />
      )}
    </>
  )
}

type FeaturedTriggerPreviewCardProps = {
  payload?: FeaturedTriggerPreviewPayload
}

function FeaturedTriggerPreviewCard({
  payload,
}: FeaturedTriggerPreviewCardProps) {
  if (!payload)
    return null

  return (
    <PreviewCardContent placement="right" popupClassName="w-[224px] px-3 py-2.5">
      <div>
        <BlockIcon size="md" className="mb-2" type={BlockEnum.TriggerPlugin} toolIcon={payload.plugin.icon} />
        <div className="mb-1 text-sm/5 text-text-primary">{payload.label}</div>
        <div className="text-xs leading-[18px] wrap-break-word text-text-secondary">{payload.description}</div>
      </div>
    </PreviewCardContent>
  )
}

export default FeaturedTriggers
