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/***************************************************************************************************
Copyright (C) 2025 The Qt Company Ltd.
SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
***************************************************************************************************/
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using OpenMeteo;
using Qt.DotNet.Utils;
namespace CityTemperatures
{
public class Weather : INotifyPropertyChanged
{
private LazyFactory lazy = new();
public Weather()
{
lazy.PropertyChanged += OnPropertyChanged;
StartRefreshLoop();
}
public string Location
{
get => lazy.Get(() => Location, () => "");
set => lazy.Set(() => Location, value);
}
public bool IsValid
{
get => lazy.Get(() => IsValid, () => false);
set => lazy.Set(() => IsValid, value);
}
public double Temperature
{
get => lazy.Get(() => Temperature, () => 0.0);
set => lazy.Set(() => Temperature, value);
}
public string TemperatureUnits
{
get => lazy.Get(() => TemperatureUnits, () => "");
set => lazy.Set(() => TemperatureUnits, value);
}
public event PropertyChangedEventHandler PropertyChanged
{
add => lazy.PropertyChanged += value;
remove => lazy.PropertyChanged -= value;
}
private OpenMeteoClient Client { get; } = new();
private void OnPropertyChanged(object sender, PropertyChangedEventArgs e)
{
if (e.PropertyName == nameof(Location))
Refresh();
}
private void StartRefreshLoop()
{
Refresh();
_ = Task.Run(() =>
{
var refreshTimer = Stopwatch.StartNew();
while (true) {
Thread.Sleep(100);
if (refreshTimer.Elapsed.TotalMinutes >= 2) {
Refresh();
refreshTimer.Restart();
}
}
});
}
public void Refresh()
{
var location = Location;
if (!string.IsNullOrEmpty(location) && Client.Query(location) is { } result) {
Temperature = result.Current.Temperature ?? 0;
TemperatureUnits = result.CurrentUnits.Temperature;
IsValid = true;
} else {
Temperature = 0;
TemperatureUnits = "";
IsValid = false;
}
}
}
}
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