import React, { useEffect, useState } from 'react';

const poets = [
  "Walt Whitman",
  "William Shakespeare",
  "Alexander Pope",
  "Edgar Allan Poe",
  "Emily Bronte",
  "John Keats",
  "Oscar Wilde",
  "William Wordsworth",
  "Charlotte Bronte",
  "Eliza Cook"
]

type dataResponse = {
  title: string;
  author: string;
  lines: Array<string>;
  linecount: number;
}

const usePoetry = (poetId: number) => { // Custom hook for retrieving poetry. Enter id and it will retrieve the corresponding poem
  const [poem, setPoem] = useState<Array<string> | null>(null); // The poem itself. Initialized as null
  const [title, setTitle] = useState("Loading...");
  const [author, setAuthor] = useState("Loading...");

  useEffect(() => { // Will run every time the Id changes
    fetch(`https://poetrydb.org/author,poemcount,linecount/${poets[poetId]};1;4`) // GET request to poetryDb
      .then((response) => response.json()) // Convert response to json
      .then((data: Array<dataResponse>) => {
        setPoem(data[0].lines); // Update the state
        setTitle(data[0].title);
        setAuthor(data[0].author);
      });
  }, [poetId]);

  return [title, poem, author] as const;
}
export default usePoetry;