import { ButtonType, ContentType, SNComponent } from '@standardnotes/snjs'
import { Button } from '@/Components/Button/Button'
import { DecoratedInput } from '@/Components/Input/DecoratedInput'
import { WebApplication } from '@/UIModels/Application'
import { FunctionComponent } from 'preact'
import { Title, PreferencesSegment } from '@/Components/Preferences/PreferencesComponents'
import { useEffect, useRef, useState } from 'preact/hooks'
import { observer } from 'mobx-react-lite'
import { ExtensionsLatestVersions } from './ExtensionsLatestVersions'
import { ExtensionItem } from './ExtensionItem'
import { ConfirmCustomExtension } from './ConfirmCustomExtension'
import { AnyExtension } from './AnyExtension'

const loadExtensions = (application: WebApplication) =>
  application.items.getItems([ContentType.ActionsExtension, ContentType.Component, ContentType.Theme]) as AnyExtension[]

export const Extensions: FunctionComponent<{
  application: WebApplication
  extensionsLatestVersions: ExtensionsLatestVersions
  className?: string
}> = observer(({ application, extensionsLatestVersions, className = '' }) => {
  const [customUrl, setCustomUrl] = useState('')
  const [confirmableExtension, setConfirmableExtension] = useState<AnyExtension | undefined>(undefined)
  const [extensions, setExtensions] = useState(loadExtensions(application))

  const confirmableEnd = useRef<HTMLDivElement>(null)

  useEffect(() => {
    if (confirmableExtension) {
      confirmableEnd.current?.scrollIntoView({ behavior: 'smooth' })
    }
  }, [confirmableExtension, confirmableEnd])

  const uninstallExtension = async (extension: AnyExtension) => {
    application.alertService
      .confirm(
        'Are you sure you want to uninstall this extension? Note that extensions managed by your subscription will automatically be re-installed on application restart.',
        'Uninstall Extension?',
        'Uninstall',
        ButtonType.Danger,
        'Cancel',
      )
      .then(async (shouldRemove: boolean) => {
        if (shouldRemove) {
          await application.mutator.deleteItem(extension)
          setExtensions(loadExtensions(application))
        }
      })
      .catch((err: string) => {
        application.alertService.alert(err).catch(console.error)
      })
  }

  const submitExtensionUrl = async (url: string) => {
    const component = await application.features.downloadExternalFeature(url)
    if (component) {
      setConfirmableExtension(component)
    }
  }

  const handleConfirmExtensionSubmit = async (confirm: boolean) => {
    if (confirm) {
      confirmExtension().catch(console.error)
    }
    setConfirmableExtension(undefined)
    setCustomUrl('')
  }

  const confirmExtension = async () => {
    await application.mutator.insertItem(confirmableExtension as AnyExtension)
    application.sync.sync().catch(console.error)
    setExtensions(loadExtensions(application))
  }

  const visibleExtensions = extensions.filter((extension) => {
    const hasPackageInfo = extension.package_info != undefined

    if (!hasPackageInfo) {
      return false
    }

    if (extension instanceof SNComponent) {
      return !['modal', 'rooms'].includes(extension.area)
    }

    return true
  })

  return (
    <div className={className}>
      {visibleExtensions.length > 0 && (
        <div>
          {visibleExtensions
            .sort((e1, e2) => e1.displayName?.toLowerCase().localeCompare(e2.displayName?.toLowerCase()))
            .map((extension, i) => (
              <ExtensionItem
                key={extension.uuid}
                application={application}
                extension={extension}
                latestVersion={extensionsLatestVersions.getVersion(extension)}
                first={i === 0}
                uninstall={uninstallExtension}
              />
            ))}
        </div>
      )}

      <div>
        {!confirmableExtension && (
          <PreferencesSegment>
            <Title>Install Custom Extension</Title>
            <DecoratedInput
              placeholder={'Enter Extension URL'}
              value={customUrl}
              onChange={(value) => {
                setCustomUrl(value)
              }}
            />
            <div className="min-h-2" />
            <Button
              className="min-w-20"
              variant="normal"
              label="Install"
              onClick={() => submitExtensionUrl(customUrl)}
            />
          </PreferencesSegment>
        )}
        {confirmableExtension && (
          <PreferencesSegment>
            <ConfirmCustomExtension component={confirmableExtension} callback={handleConfirmExtensionSubmit} />
            <div ref={confirmableEnd} />
          </PreferencesSegment>
        )}
      </div>
    </div>
  )
})