import Layout from "../../components/Layout";
import Util from '../../lib/utils'
import FolderTree from "../../components/FolderTree";
import MDContent from "../../components/MDContent";


// This trick is to dynamically load component that interact with window object (browser only)
export default function Home({ content, tree, flattenNodes, backLinks }) {
  return (
    <Layout>
      <div className='notes-container'>
        <nav className="nav-bar">
          <FolderTree tree={tree} flattenNodes={flattenNodes} />
        </nav>
        <MDContent content={content} handleOpenNewContent={null} backLinks={backLinks} />
      </div>
    </Layout>
  );

}


export function getStaticProps() {
  const { nodes, edges } = Util.constructGraphData()
  const tree = Util.convertObject(Util.getDirectoryData());
  const contentData = Util.getSinglePost("index");
  const flattenNodes = Util.getFlattenArray(tree)
  const listOfEdges = edges.filter(anEdge => anEdge.target === "index")
  const internalLinks = listOfEdges.map(anEdge => nodes.find(aNode => aNode.slug === anEdge.source)).filter(element => element !== undefined)
  const backLinks = [...new Set(internalLinks)]

  return {
    props: {
      content: contentData.data,
      tree: tree,
      flattenNodes: flattenNodes,
      backLinks: backLinks
    },
  };
}