'use client'
import { Button } from '@langgenius/dify-ui/button'
import { useSuspenseQuery } from '@tanstack/react-query'
import { noop } from 'es-toolkit/function'
import * as React from 'react'
import { useEffect, useMemo, useRef, useState } from 'react'
import { useTranslation } from 'react-i18next'
import { Group } from '@/app/components/base/icons/src/vender/other'
import { FileZip } from '@/app/components/base/icons/src/vender/solid/files'
import { Github } from '@/app/components/base/icons/src/vender/solid/general'
import { MagicBox } from '@/app/components/base/icons/src/vender/solid/mediaAndDevices'
import InstallFromGitHub from '@/app/components/plugins/install-plugin/install-from-github'
import InstallFromLocalPackage from '@/app/components/plugins/install-plugin/install-from-local-package'
import { SUPPORT_INSTALL_LOCAL_FILE_EXTENSIONS } from '@/config'
import { systemFeaturesQueryOptions } from '@/service/system-features'
import { useInstalledPluginList } from '@/service/use-plugins'
import Line from '../../marketplace/empty/line'
import { usePluginPageContext } from '../context'

type InstallMethod = {
  icon: React.FC<{ className?: string }>
  text: string
  action: string
}

const Empty = () => {
  const { t } = useTranslation()
  const fileInputRef = useRef<HTMLInputElement>(null)
  const [selectedAction, setSelectedAction] = useState<string | null>(null)
  const [selectedFile, setSelectedFile] = useState<File | null>(null)
  const { data: enable_marketplace } = useSuspenseQuery({
    ...systemFeaturesQueryOptions(),
    select: s => s.enable_marketplace,
  })
  const { data: plugin_installation_permission } = useSuspenseQuery({
    ...systemFeaturesQueryOptions(),
    select: s => s.plugin_installation_permission,
  })
  const setActiveTab = usePluginPageContext(v => v.setActiveTab)

  const handleFileChange = (event: React.ChangeEvent<HTMLInputElement>) => {
    const file = event.target.files?.[0]
    if (file) {
      setSelectedFile(file)
      setSelectedAction('local')
    }
  }
  const filters = usePluginPageContext(v => v.filters)
  const { data: pluginList } = useInstalledPluginList()

  const text = useMemo(() => {
    if (pluginList?.plugins.length === 0)
      return t('list.noInstalled', { ns: 'plugin' })
    if (filters.categories.length > 0 || filters.tags.length > 0 || filters.searchQuery)
      return t('list.notFound', { ns: 'plugin' })
  }, [pluginList?.plugins.length, t, filters.categories.length, filters.tags.length, filters.searchQuery])

  const [installMethods, setInstallMethods] = useState<InstallMethod[]>([])
  useEffect(() => {
    const methods = []
    if (enable_marketplace)
      methods.push({ icon: MagicBox, text: t('source.marketplace', { ns: 'plugin' }), action: 'marketplace' })

    if (plugin_installation_permission.restrict_to_marketplace_only) {
      setInstallMethods(methods)
    }
    else {
      methods.push({ icon: Github, text: t('source.github', { ns: 'plugin' }), action: 'github' })
      methods.push({ icon: FileZip, text: t('source.local', { ns: 'plugin' }), action: 'local' })
      setInstallMethods(methods)
    }
  }, [plugin_installation_permission, enable_marketplace, t])

  return (
    <div className="relative z-0 w-full grow">
      {/* skeleton */}
      <div className="absolute top-0 z-10 grid size-full grid-cols-2 gap-2 overflow-hidden px-12">
        {Array.from({ length: 20 }).fill(0).map((_, i) => (
          <div key={i} className="h-24 rounded-xl bg-components-card-bg" />
        ))}
      </div>
      {/* mask */}
      <div className="absolute z-20 size-full bg-linear-to-b from-components-panel-bg-transparent to-components-panel-bg" />
      <div className="relative z-30 flex h-full items-center justify-center">
        <div className="flex flex-col items-center gap-y-3">
          <div className="relative -z-10 flex size-14 items-center justify-center rounded-xl
          border border-dashed border-divider-deep bg-components-card-bg shadow-xl shadow-shadow-shadow-5"
          >
            <Group className="size-5 text-text-tertiary" />
            <Line className="absolute top-1/2 -right-px -translate-y-1/2" />
            <Line className="absolute top-1/2 -left-px -translate-y-1/2" />
            <Line className="absolute top-0 left-1/2 -translate-1/2 rotate-90" />
            <Line className="absolute top-full left-1/2 -translate-1/2 rotate-90" />
          </div>
          <div className="system-md-regular text-text-tertiary">
            {text}
          </div>
          <div className="flex w-[236px] flex-col">
            <input
              type="file"
              ref={fileInputRef}
              style={{ display: 'none' }}
              onChange={handleFileChange}
              accept={SUPPORT_INSTALL_LOCAL_FILE_EXTENSIONS}
            />
            <div className="flex w-full flex-col gap-y-1">
              {installMethods.map(({ icon: Icon, text, action }) => (
                <Button
                  key={action}
                  className="justify-start gap-x-0.5 px-3"
                  onClick={() => {
                    if (action === 'local')
                      fileInputRef.current?.click()
                    else if (action === 'marketplace')
                      setActiveTab('discover')
                    else
                      setSelectedAction(action)
                  }}
                >
                  <Icon className="size-4" />
                  <span className="px-0.5">{text}</span>
                </Button>
              ))}
            </div>
          </div>
        </div>
        {selectedAction === 'github' && (
          <InstallFromGitHub
            onSuccess={noop}
            onClose={() => setSelectedAction(null)}
          />
        )}
        {selectedAction === 'local' && selectedFile
          && (
            <InstallFromLocalPackage
              file={selectedFile}
              onClose={() => setSelectedAction(null)}
              onSuccess={noop}
            />
          )}
      </div>
    </div>
  )
}

Empty.displayName = 'Empty'

export default React.memo(Empty)