Olian04/brynja

import { BuilderCB, buildNode, newVNode } from './builder';
import { IRenderer } from './interfaces/Renderer';
import { VNode } from './interfaces/VNode';
import { renderNode } from './renderNode';
import { renderStyle } from './renderStyles';
import { updateNode } from './updateNode';

export function Renderer(config: { rootElement: HTMLElement }): IRenderer {
  let initialRender = true;
  let oldRootNode: VNode | null = null;
  return {
    render(rootBuilder: BuilderCB) {
      const [rootNode, styles] = buildNode(
        config.rootElement.tagName.toLowerCase(),
        rootBuilder,
      );

      // Append styles if needed
      if (Object.keys(styles).length > 0) {
        rootNode.children.push(
          newVNode({
            tag: 'style',
            text: renderStyle(styles),
            props: {
              type: 'text/css',
            },
          }),
        );
      }

      // Render / Update HTML
      if (initialRender) {
        initialRender = false;
        const newRoot = renderNode(rootNode);
        config.rootElement.replaceWith(newRoot);
        config.rootElement = newRoot;
      } else {
        updateNode(rootNode, oldRootNode as VNode, config.rootElement);
      }

      // Update refs for next render
      oldRootNode = rootNode;
    },
  };
}