/**
 * Main React app logic
 */

import React, { useState, useEffect, useCallback } from "react";

import Detail from "./Detail.js";
import buildGraph from "../graph.js";

export default function App() {
  const [db, setDb] = useState(null);
  const [node, setNode] = useState(null);
  const [detailVisible, setDetailVisible] = useState(null);

  useEffect(async () => {
    const newDb = await loadDB();
    setDb(newDb);
    buildGraph(newDb, {
      click: handleClick,
    });
  }, []);

  const handleClick = useCallback((node) => {
    setNode(node);
    setDetailVisible(true);
  });

  const handleClose = useCallback((node) => {
    setDetailVisible(false);
  });

  return (
    <div>
      <Detail node={node} visible={detailVisible} onClose={handleClose} />
    </div>
  );
}

async function loadDB() {
  const request = await fetch("/assets/db.json");
  return await request.json();
}