import React from "react";
import { useState } from "react";
import { fetchWeather } from "../utils/apiFunc";
import { toast } from "react-toastify";
import WeatherData from "./WeatherData";
import { useEffect } from "react";
import { X } from "lucide-react";

const WeatherCard: React.FC = () => {
  const [city, setCity] = useState("");
  const [weatherData, setWeatherData] = useState(false);
  const getUnit = () => localStorage.getItem("unit") || "metric";

  const handleCityChange = (event: React.ChangeEvent<HTMLInputElement>) => {
    setCity(event.target.value);
  };

  const handleSubmit = async (event: React.FormEvent<HTMLFormElement>) => {
    event.preventDefault();
    setWeatherData(false);
    toast
      .promise(fetchWeather(city, getUnit()), {
        pending: "Fetching weather data...",
        success: "Weather data loaded successfully!",
        error:
          "Failed to load weather data. Please check your entered city name. (Error: x4040)",
      })
      .then(() => {
        if (localStorage.getItem("weather")) {
          setWeatherData(true);
        } else {
          setWeatherData(false);
        }
      });
  };

  // Check if weather data is already in localStorage - when entering the page via URL/reload
  useEffect(() => {
    if (localStorage.getItem("weather")) {
      setWeatherData(true);
    } else {
      setWeatherData(false);
    }
  }, []);

  return (
    <div className="w-full max-w-lg mx-auto bg-white/80 rounded-2xl shadow-xl p-8 mt-8">
      <h2 className="text-3xl font-bold mb-4 text-blue-700 flex items-center gap-2">
        Weather
      </h2>
      <p className="mb-2 text-gray-600">
        Current weather will be displayed here.
      </p>
      <p className="mb-2 text-gray-600">
        <strong>You don't need an API Key!</strong>
      </p>
      <form onSubmit={handleSubmit} className="flex flex-col gap-4 mt-4">
        <label htmlFor="city" className="font-medium text-gray-700">
          Enter City:
        </label>
        <input
          type="text"
          id="city"
          name="city"
          onChange={handleCityChange}
          value={city}
          placeholder="City Name"
          required
          className="border border-blue-300 rounded-xl px-4 py-3 focus:outline-none focus:ring-2 focus:ring-blue-400 bg-blue-50 text-blue-900 font-mono"
        />
        <div className="cursor-pointer flex items-center gap-2">
          <button
            type="submit"
            className="cursor-pointer flex-1 bg-gradient-to-r from-blue-600 to-blue-400 text-white font-bold px-4 py-3 rounded-xl shadow-lg hover:from-blue-700 hover:to-blue-500 transition-all"
          >
            Get Weather
          </button>
          {weatherData && (
            <button
              type="button"
              onClick={() => {
                setWeatherData(false);
                localStorage.removeItem("weather");
              }}
              className="cursor-pointer flex-shrink-0 bg-red-500 hover:bg-red-600 text-white rounded-xl p-3 shadow-lg transition-colors duration-200 focus:outline-none focus:ring-2 focus:ring-red-400"
              aria-label="Close weather data"
            >
              <X />
            </button>
          )}
        </div>
      </form>
      {weatherData && <WeatherData />}
    </div>
  );
};

export default WeatherCard;