/**
 * Main interaction logic
 */

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

import Detail from "./Detail.js";
import Legend from "./Legend.js";
import Quote from "./Quote.js";
import Credits from "./Credits.js";
import Title from "./Title.js";
import buildGraph from "../graph.js";

export default function Graph({ db }) {
  const [node, setNode] = useState(null);
  const [graph, setGraph] = useState(null);
  const [selectedCategory, setSelectedCategory] = useState(null);
  const [detailVisible, setDetailVisible] = useState(false);
  const [creditsVisible, setCreditsVisible] = useState(false);
  const [introDone, setIntroDone] = useState(false);
  const [introCurtainDone, setIntroCurtainDone] = useState(false);
  const [introTextDone, setIntroTextDone] = useState(false);

  /** Build the graph */
  useEffect(() => {
    setGraph(
      buildGraph({
        db,
        handlers: {
          click: handleClick,
        },
      })
    );
    setTimeout(() => {
      setIntroCurtainDone(true);
      setTimeout(() => {
        setIntroDone(true);
      }, 4000);
      setTimeout(() => {
        setIntroTextDone(true);
      }, 8000);
    }, 10);
  }, []);

  /** Click to open a node */
  const handleClick = useCallback((node) => {
    setNode(node);
    setDetailVisible(true);
  });

  /** Click to close the media modal */
  const handleClose = useCallback((node) => {
    setDetailVisible(false);
  });

  /** Select or clear the category */
  const handleSelect = useCallback((category) => {
    if (category === selectedCategory) {
      setSelectedCategory(null);
      graph.onSelect(null);
    } else {
      setSelectedCategory(category);
      graph.onSelect(category);
    }
  });

  return (
    <div className={introTextDone ? "" : "intro-text"}>
      <Detail node={node} visible={detailVisible} onClose={handleClose} />
      <Legend
        visible={introDone && !detailVisible && !creditsVisible}
        selected={selectedCategory}
        onSelect={handleSelect}
      />
      <Quote visible={introDone && !detailVisible && !creditsVisible} />
      <Credits
        onToggle={setCreditsVisible}
        visible={introDone && !detailVisible}
        open={creditsVisible}
      />
      <Title visible={introDone && !detailVisible && !creditsVisible} />
      <div className={introCurtainDone ? "curtain done" : "curtain"} />
    </div>
  );
}