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


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

}


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

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