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import type { Editor, Range } from "@tiptap/core";
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import { Fragment } from "@tiptap/pm/model";
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interface CanInsertPageMentionsOpts {
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  editable: boolean;
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  workspaceId: string | undefined;
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  shareToken: string | undefined;
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}
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export function canInsertPageMentions(opts: CanInsertPageMentionsOpts): boolean {
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  return opts.editable && !!opts.workspaceId && !opts.shareToken;
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}
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export function canInsertPageMentionAtRange(editor: Editor, range?: Range): boolean {
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  if (!editor.isEditable) return false;
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  const pageMention = editor.schema.nodes.pageMention;
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  if (!pageMention) return false;
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  const from = range ? Math.min(range.from, range.to) : editor.state.selection.from;
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  const to = range ? Math.max(range.from, range.to) : editor.state.selection.to;
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  const tr = editor.state.tr;
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  if (from !== to) {
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    tr.deleteRange(from, to);
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  }
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  const insertPos = tr.mapping.map(from, -1);
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  const $pos = tr.doc.resolve(insertPos);
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  const mentionNode = pageMention.create({ pageId: "__page-mention-probe__" });
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  const probe = Fragment.fromArray([mentionNode, editor.schema.text(" ")]);
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  return $pos.parent.canReplace($pos.index(), $pos.index(), probe);
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}