import { createEffect, createSignal, onCleanup, onMount, Show } from 'solid-js'
import { Portal } from 'solid-js/web'
import {
  createEditorTransaction,
  createTiptapEditor,
  useEditorHTML,
  useEditorIsEmpty,
  useEditorIsFocused
} from 'solid-tiptap'
import { useEditorContext } from '../../context/editor'
import { Document } from '@tiptap/extension-document'
import { Text } from '@tiptap/extension-text'
import { Paragraph } from '@tiptap/extension-paragraph'
import { Bold } from '@tiptap/extension-bold'
import { Button } from '../_shared/Button'
import { useLocalize } from '../../context/localize'
import { Icon } from '../_shared/Icon'
import { Popover } from '../_shared/Popover'
import { Italic } from '@tiptap/extension-italic'
import { Modal } from '../Nav/Modal'
import { hideModal, showModal } from '../../stores/ui'
import { Blockquote } from '@tiptap/extension-blockquote'
import { UploadModalContent } from './UploadModalContent'
import { imageProxy } from '../../utils/imageProxy'
import { clsx } from 'clsx'
import styles from './SimplifiedEditor.module.scss'
import { Placeholder } from '@tiptap/extension-placeholder'
import { InsertLinkForm } from './InsertLinkForm'
import { Link } from '@tiptap/extension-link'
import { UploadedFile } from '../../pages/types'
import { Figure } from './extensions/Figure'
import { Image } from '@tiptap/extension-image'
import { Figcaption } from './extensions/Figcaption'
import { TextBubbleMenu } from './TextBubbleMenu'
import { BubbleMenu } from '@tiptap/extension-bubble-menu'
import { CharacterCount } from '@tiptap/extension-character-count'

type Props = {
  placeholder: string
  initialContent?: string
  label?: string
  onSubmit?: (text: string) => void
  onCancel?: () => void
  onChange?: (text: string) => void
  variant?: 'minimal' | 'bordered'
  maxLength?: number
  maxHeight?: number
  submitButtonText?: string
  quoteEnabled?: boolean
  imageEnabled?: boolean
  setClear?: boolean
  smallHeight?: boolean
  submitByEnter?: boolean
  submitByShiftEnter?: boolean
  onlyBubbleControls?: boolean
  controlsAlwaysVisible?: boolean
}

export const MAX_DESCRIPTION_LIMIT = 400

const SimplifiedEditor = (props: Props) => {
  const { t } = useLocalize()
  const [counter, setCounter] = createSignal<number>()

  const wrapperEditorElRef: {
    current: HTMLElement
  } = {
    current: null
  }

  const editorElRef: {
    current: HTMLElement
  } = {
    current: null
  }

  const textBubbleMenuRef: {
    current: HTMLDivElement
  } = {
    current: null
  }

  const {
    actions: { setEditor }
  } = useEditorContext()

  const ImageFigure = Figure.extend({
    name: 'capturedImage',
    content: 'figcaption image'
  })

  const content = props.initialContent
  const editor = createTiptapEditor(() => ({
    element: editorElRef.current,
    editorProps: {
      attributes: {
        class: styles.simplifiedEditorField
      }
    },
    extensions: [
      Document,
      Text,
      Paragraph,
      Bold,
      Italic,
      Link.configure({
        openOnClick: false
      }),

      CharacterCount.configure({
        limit: MAX_DESCRIPTION_LIMIT
      }),
      Blockquote.configure({
        HTMLAttributes: {
          class: styles.blockQuote
        }
      }),
      BubbleMenu.configure({
        pluginKey: 'textBubbleMenu',
        element: textBubbleMenuRef.current,
        shouldShow: ({ view, state }) => {
          if (!props.onlyBubbleControls) return
          const { selection } = state
          const { empty } = selection
          return view.hasFocus() && !empty
        }
      }),
      ImageFigure,
      Image,
      Figcaption,
      Placeholder.configure({
        emptyNodeClass: styles.emptyNode,
        placeholder: props.placeholder
      })
    ],
    content: content ?? null
  }))

  setEditor(editor)
  const isEmpty = useEditorIsEmpty(() => editor())
  const isFocused = useEditorIsFocused(() => editor())

  const isActive = (name: string) =>
    createEditorTransaction(
      () => editor(),
      (ed) => {
        return ed && ed.isActive(name)
      }
    )

  const html = useEditorHTML(() => editor())
  const isBold = isActive('bold')
  const isItalic = isActive('italic')
  const isLink = isActive('link')
  const isBlockquote = isActive('blockquote')

  const renderImage = (image: UploadedFile) => {
    editor()
      .chain()
      .focus()
      .insertContent({
        type: 'capturedImage',
        content: [
          {
            type: 'figcaption',
            content: [
              {
                type: 'text',
                text: image.originalFilename
              }
            ]
          },
          {
            type: 'image',
            attrs: {
              src: imageProxy(image.url)
            }
          }
        ]
      })
      .run()
    hideModal()
  }

  const handleClear = () => {
    if (props.onCancel) {
      props.onCancel()
    }
    editor().commands.clearContent(true)
  }

  createEffect(() => {
    if (props.setClear) {
      editor().commands.clearContent(true)
    }
  })

  const handleKeyDown = async (event) => {
    if (isEmpty() || !isFocused()) {
      return
    }

    if (
      event.code === 'Enter' &&
      ((props.submitByEnter && !event.shiftKey) || (props.submitByShiftEnter && event.shiftKey))
    ) {
      event.preventDefault()
      props.onSubmit(html())
      handleClear()
    }

    if (event.code === 'KeyK' && (event.metaKey || event.ctrlKey) && !editor().state.selection.empty) {
      event.preventDefault()
      showModal('simplifiedEditorInsertLink')
    }
  }

  onMount(() => {
    window.addEventListener('keydown', handleKeyDown)
    onCleanup(() => {
      window.removeEventListener('keydown', handleKeyDown)
      editor()?.destroy()
    })
  })

  if (props.onChange) {
    createEffect(() => {
      props.onChange(html())
    })
  }

  const handleInsertLink = () => !editor().state.selection.empty && showModal('simplifiedEditorInsertLink')

  createEffect(() => {
    if (html()) {
      setCounter(editor().storage.characterCount.characters())
    }
  })

  const maxHeightStyle = {
    overflow: 'auto',
    'max-height': `${props.maxHeight}px`
  }

  return (
    <div
      ref={(el) => (wrapperEditorElRef.current = el)}
      class={clsx(styles.SimplifiedEditor, {
        [styles.smallHeight]: props.smallHeight,
        [styles.minimal]: props.variant === 'minimal',
        [styles.bordered]: props.variant === 'bordered',
        [styles.isFocused]: isFocused() || !isEmpty(),
        [styles.labelVisible]: props.label && counter() > 0
      })}
    >
      <Show when={props.maxLength && editor()}>
        <div class={styles.limit}>{MAX_DESCRIPTION_LIMIT - counter()}</div>
      </Show>
      <Show when={props.label && counter() > 0}>
        <div class={styles.label}>{props.label}</div>
      </Show>
      <div style={props.maxHeight && maxHeightStyle} ref={(el) => (editorElRef.current = el)} />
      <Show when={!props.onlyBubbleControls}>
        <div class={clsx(styles.controls, { [styles.alwaysVisible]: props.controlsAlwaysVisible })}>
          <div class={styles.actions}>
            <Popover content={t('Bold')}>
              {(triggerRef: (el) => void) => (
                <button
                  ref={triggerRef}
                  type="button"
                  class={clsx(styles.actionButton, { [styles.active]: isBold() })}
                  onClick={() => editor().chain().focus().toggleBold().run()}
                >
                  <Icon name="editor-bold" />
                </button>
              )}
            </Popover>
            <Popover content={t('Italic')}>
              {(triggerRef: (el) => void) => (
                <button
                  ref={triggerRef}
                  type="button"
                  class={clsx(styles.actionButton, { [styles.active]: isItalic() })}
                  onClick={() => editor().chain().focus().toggleItalic().run()}
                >
                  <Icon name="editor-italic" />
                </button>
              )}
            </Popover>
            <Popover content={t('Add url')}>
              {(triggerRef: (el) => void) => (
                <button
                  ref={triggerRef}
                  type="button"
                  onClick={handleInsertLink}
                  class={clsx(styles.actionButton, { [styles.active]: isLink() })}
                >
                  <Icon name="editor-link" />
                </button>
              )}
            </Popover>
            <Show when={props.quoteEnabled}>
              <Popover content={t('Add blockquote')}>
                {(triggerRef: (el) => void) => (
                  <button
                    ref={triggerRef}
                    type="button"
                    onClick={() => editor().chain().focus().toggleBlockquote().run()}
                    class={clsx(styles.actionButton, { [styles.active]: isBlockquote() })}
                  >
                    <Icon name="editor-quote" />
                  </button>
                )}
              </Popover>
            </Show>
            <Show when={props.imageEnabled}>
              <Popover content={t('Add image')}>
                {(triggerRef: (el) => void) => (
                  <button
                    ref={triggerRef}
                    type="button"
                    onClick={() => showModal('simplifiedEditorUploadImage')}
                    class={clsx(styles.actionButton, { [styles.active]: isBlockquote() })}
                  >
                    <Icon name="editor-image-dd-full" />
                  </button>
                )}
              </Popover>
            </Show>
          </div>
          <Show when={!props.onChange}>
            <div class={styles.buttons}>
              <Button value={t('Cancel')} variant="secondary" onClick={handleClear} />
              <Button
                value={props.submitButtonText ?? t('Send')}
                variant="primary"
                disabled={isEmpty()}
                onClick={() => props.onSubmit(html())}
              />
            </div>
          </Show>
        </div>
      </Show>
      <Portal>
        <Modal variant="narrow" name="simplifiedEditorInsertLink">
          <InsertLinkForm editor={editor()} onClose={() => hideModal()} />
        </Modal>
      </Portal>
      <Show when={props.imageEnabled}>
        <Portal>
          <Modal variant="narrow" name="simplifiedEditorUploadImage">
            <UploadModalContent
              onClose={(value) => {
                renderImage(value)
              }}
            />
          </Modal>
        </Portal>
      </Show>
      <Show when={props.onlyBubbleControls}>
        <TextBubbleMenu
          shouldShow={true}
          isCommonMarkup={true}
          editor={editor()}
          ref={(el) => (textBubbleMenuRef.current = el)}
        />
      </Show>
    </div>
  )
}

export default SimplifiedEditor // "export default" need to use for asynchronous (lazy) imports in the comments tree