import React, { useState, useEffect } from "react";
import { useParams } from "react-router-dom";
import { formatDate } from "../utils/formatDate";
import "./Reservations.css";
import BackButton from "./BackButton";

const Reservation = () => {
  const { id } = useParams();
  const [reservation, setReservation] = useState({});
  const [isNotFound, setIsNotFound] = useState(false);
  const [isNotValid, setIsNotValid] = useState(false);
  const [isLoading, setIsLoading] = useState(true);

  useEffect(() => {
    const fetchData = async () => {
      const response = await fetch(`http://localhost:5000/reservations/${id}`);

      if (response.status === 404) {
        setIsNotFound(true);
        return;
      }

      if (response.status === 400) {
        setIsNotValid(true);
        return;
      }

      const data = await response.json();
      setReservation(data);
      setIsLoading(false);
    };

    fetchData();
  }, [id]);

  if (isNotFound) {
    return (
      <>
        <p className="error">Sorry! We can't find that reservation.</p>
        <BackButton />
      </>
    );
  }

  if (isNotValid) {
    return (
      <>
        <p className="error">Sorry! The reservation ID is invalid.</p>
        <BackButton />
      </>
    );
  }

  if (isLoading) {
    return <p>Loading...</p>;
  }

  return (
    <>
      <div className="reservation">
        <h1 className="restaurant-name">{reservation.restaurantName}</h1>
        <p className="date">{formatDate(reservation.date)}</p>
        <p className="party-size">
          <strong>Party size: </strong>
          {reservation.partySize}
        </p>
      </div>
      <BackButton />
    </>
  );
};

export default Reservation;