import { matchFlavours } from '@blocksuite/affine-shared/utils';
import type { BlockStdScope } from '@blocksuite/block-std';
import type { BlockModel } from '@blocksuite/store';

import { focusTextModel } from '../dom.js';

export function toCode(
  std: BlockStdScope,
  model: BlockModel,
  prefixText: string,
  language: string | null
) {
  if (matchFlavours(model, ['affine:paragraph']) && model.type === 'quote') {
    return;
  }

  const doc = model.doc;
  const parent = doc.getParent(model);
  if (!parent) {
    return;
  }

  doc.captureSync();
  const index = parent.children.indexOf(model);

  const codeId = doc.addBlock('affine:code', { language }, parent, index);

  if (model.text && model.text.length > prefixText.length) {
    const text = model.text.clone();
    doc.addBlock('affine:paragraph', { text }, parent, index + 1);
    text.delete(0, prefixText.length);
  }
  doc.deleteBlock(model, { bringChildrenTo: parent });

  focusTextModel(std, codeId);

  return codeId;
}