const API_KEY = "9cc4edd6d8064a5b7d8fea55305f7c1d"
const API_URL = "https://api.opencagedata.com/geocode/v1/json"

let weather = {
  apiKey: API_KEY,
  fetchWeather: function (city) {
    fetch(`https://api.openweathermap.org/data/2.5/weather?q=${city}&units=metric&appid=${this.appkey}`)
      .then((response) => { // error part if it fails
        if (!response.ok) {
          alert("No weather found.");
          throw new Error("No weather found.");
        }
        return response.json();
      })
      .then((data) => this.displayWeather(data));
  },
  displayWeather: function (data) {
    const { name } = data;
    const { icon, description } = data.weather[0];
    const { temp, humidity } = data.main;
    const { speed } = data.wind;
    document.querySelector(".city").innerText = `Weather in ${name}`;
    document.querySelector(".icon").src = `https://openweathermap.org/img/wn/${icon}.png`;
    document.querySelector(".description").innerText = description;
    document.querySelector(".temp").innerText = `${temp} °C`;
    document.querySelector(".humidity").innerText = `Humidity: ${humidity}%`;
    document.querySelector(".wind").innerText = `Wind speed: ${speed}km/h`;
    document.querySelector(".weather").classList.remove("loading");
    document.body.style.backgroundImage = `var(--${data.weather[0].main})`;
    },
  search: function () {
    this.fetchWeather(document.querySelector(".search-bar").value);
  }, 
};

let forcast = {
  apiKey: API_KEY,
  fetchForcast: function(latitude, longitude) {
    fetch(`https://api.openweathermap.org/data/2.5/forcast?lat=${latitude}&lon${longitude}&apiid=${this.apiKey}`)
      .then((responce) => {
        if (!responce.ok) {
          alert("No forcast found");
          throw new Error("No forcast found.");
        }
        return responce.json();
      }).then((data) => this.displayForcast(data));
  },
  displayForcast: function(data) {
    
  }
}

let geocode = {
  reverseGeocode: function (latitude, longitude) {
    var request_url = `${API_URL}?key=${API_KEY}&q=${encodeURIComponent(latitude+","+longitude)}&pretty=1&no_annotations=1`

    // see full list of required and optional parameters:
    // https://opencagedata.com/api#forward

    var request = new XMLHttpRequest();
    request.open("GET", request_url, true);

    request.onload = function () {
      // see full list of possible response codes:
      // https://opencagedata.com/api#codes

      if (request.status == 200) {
        // Success!
        var data = JSON.parse(request.responseText);
        weather.fetchWeather(data.results[0].components.city);
        console.log(data.results[0].components.city)
      } else if (request.status <= 500) {
        // We reached our target server, but it returned an error

        console.log("unable to geocode! Response code: " + request.status);
        var data = JSON.parse(request.responseText);
        console.log("error msg: " + data.status.message);
      } else {
        console.log("server error");
      }
    };

    request.onerror = function () {
      // There was a connection error of some sort
      console.log("unable to connect to server");
    };

    request.send(); // make the request
  },
  getLocation: function() {
    function success (data) {
      geocode.reverseGeocode(data.coords.latitude, data.coords.longitude);
    }
    if (navigator.geolocation) {
      navigator.geolocation.getCurrentPosition(success, console.error);
    }
    else {
      weather.fetchWeather("Surrey");
    }
  }
};

document.querySelector(".search button").addEventListener("click", function () {
  weather.search();
});

document.querySelector(".search-bar")
.addEventListener("keyup", function (event) {
  if (event.key == "Enter") {
    weather.search();
  }
});

geocode.getLocation();