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import { nodes } from 'prosemirror-schema-basic';
import type { Node, NodeSpec } from 'prosemirror-model';
import { listItem as _listItem } from 'prosemirror-schema-list';

type Attr = Record<string, number | string>;

const orderedList: NodeSpec = {
  attrs: {
    order: {
      default: 1,
    },
    listStyleType: {
      default: '',
    },
    fontsize: {
      default: '',
    },
    color: {
      default: '',
    },
  },
  content: 'list_item+',
  group: 'block',
  parseDOM: [
    {
      tag: 'ol',
      getAttrs: (dom) => {
        const order =
          ((dom as HTMLElement).hasAttribute('start')
            ? (dom as HTMLElement).getAttribute('start')
            : 1) || 1;
        const attr: Attr = { order: +order };

        const { listStyleType, fontSize, color } = (dom as HTMLElement).style;
        if (listStyleType) attr['listStyleType'] = listStyleType;
        if (fontSize) attr['fontsize'] = fontSize;
        if (color) attr['color'] = color;

        return attr;
      },
    },
  ],
  toDOM: (node: Node) => {
    const { order, listStyleType, fontsize, color } = node.attrs;
    let style = '';
    if (listStyleType) style += `list-style-type: ${listStyleType};`;
    if (fontsize) style += `font-size: ${fontsize};`;
    if (color) style += `color: ${color};`;

    const attr: Attr = { style };
    if (order !== 1) attr['start'] = order;

    return ['ol', attr, 0];
  },
};

const bulletList: NodeSpec = {
  attrs: {
    listStyleType: {
      default: '',
    },
    fontsize: {
      default: '',
    },
    color: {
      default: '',
    },
  },
  content: 'list_item+',
  group: 'block',
  parseDOM: [
    {
      tag: 'ul',
      getAttrs: (dom) => {
        const attr: Attr = {};

        const { listStyleType, fontSize, color } = (dom as HTMLElement).style;
        if (listStyleType) attr['listStyleType'] = listStyleType;
        if (fontSize) attr['fontsize'] = fontSize;
        if (color) attr['color'] = color;

        return attr;
      },
    },
  ],
  toDOM: (node: Node) => {
    const { listStyleType, fontsize, color } = node.attrs;
    let style = '';
    if (listStyleType) style += `list-style-type: ${listStyleType};`;
    if (fontsize) style += `font-size: ${fontsize};`;
    if (color) style += `color: ${color};`;

    return ['ul', { style }, 0];
  },
};

const listItem: NodeSpec = {
  ..._listItem,
  content: 'paragraph block*',
  group: 'block',
};

const paragraph: NodeSpec = {
  attrs: {
    align: {
      default: '',
    },
    indent: {
      default: 0,
    },
    textIndent: {
      default: 0,
    },
  },
  content: 'inline*',
  group: 'block',
  parseDOM: [
    {
      tag: 'p',
      getAttrs: (dom) => {
        const { textAlign, textIndent } = (dom as HTMLElement).style;

        let align = (dom as HTMLElement).getAttribute('align') || textAlign || '';
        align = /(left|right|center|justify)/.test(align) ? align : '';

        let textIndentLevel = 0;
        if (textIndent) {
          if (/em/.test(textIndent)) {
            textIndentLevel = parseInt(textIndent);
          } else if (/px/.test(textIndent)) {
            textIndentLevel = Math.floor(parseInt(textIndent) / 16);
            if (!textIndentLevel) textIndentLevel = 1;
          }
        }

        const indent = +((dom as HTMLElement).getAttribute('data-indent') || 0);

        return { align, indent, textIndent: textIndentLevel };
      },
    },
    {
      tag: 'img',
      ignore: true,
    },
    {
      tag: 'pre',
      skip: true,
    },
  ],
  toDOM: (node: Node) => {
    const { align, indent, textIndent } = node.attrs;
    let style = '';
    if (align && align !== 'left') style += `text-align: ${align};`;
    if (textIndent) style += `text-indent: ${textIndent}em;`;

    const attr: Attr = { style };
    if (indent) attr['data-indent'] = indent;

    return ['p', attr, 0];
  },
};

const { doc, blockquote, text } = nodes;

const schemaNodes = {
  doc,
  paragraph,
  blockquote,
  text,
  ordered_list: orderedList,
  bullet_list: bulletList,
  list_item: listItem,
};

export default schemaNodes;