using System;
using BITKit.UX;
using Cysharp.Threading.Tasks;
using UnityEngine;
using UnityEngine.UIElements;

namespace BITKit.Apps
{
	public class UXApplicationService : MonoBehaviour
	{
		[SerializeField] private bool externalDownload;
		[SerializeField, SerializeReference, SubclassSelector]
		private IApplicationService applicationService;
		[SerializeField] private UIDocument document;
		
		[UXBindPath("container")]
		private VisualElement _container;
		[UXBindPath("download-button")]
		private Button _downloadButton;
		[UXBindPath("cancel-download-button")]
		private Button _cancelDownloadButton;
		[UXBindPath("install-button")]
		private Button _installButton;
		[UXBindPath("latest-version-label")]
		private Label _latestVersionLabel;
		[UXBindPath("download-bar")]
		private ProgressBar _downloadBar;

		private void Start()
		{
			UXUtils.Inject(this);
			applicationService.OnLatestVersionCheck += OnLatestVersionCheck;
			applicationService.OnDownloadLatest+= OnDownloadLatest;
			applicationService.OnDownloadProgress += OnDownloadProgress;
			applicationService.OnDownloadComplete += OnDownloadComplete;
			
			_downloadButton.clicked+=ConfirmDownload;
			_cancelDownloadButton.clicked+=OnCancelDownload;
			destroyCancellationToken.Register(Dispose);
			
			_container.Navigate("entry-container");
		}

		private void Dispose()
		{
			applicationService.OnLatestVersionCheck -= OnLatestVersionCheck;
			applicationService.OnDownloadLatest-= OnDownloadLatest;
			applicationService.OnDownloadProgress -= OnDownloadProgress;
			applicationService.OnDownloadComplete -= OnDownloadComplete;
		}
		private void OnDownloadLatest(string obj)
		{
			_container.Navigate("download-container");
		}

		private void ConfirmDownload()
		{
			if (externalDownload)
			{
				Application.OpenURL(applicationService.DownloadLatestUrl);
			}
			else
			{
				applicationService.DownloadLatestVersionAsync().Forget();
			}
		}

		private void OnDownloadComplete(string obj)
		{
			_container.Navigate("complete-container");
		}

		private void OnDownloadProgress(float obj)
		{
			//设置为百分比
			_downloadBar.value = obj;
			//保留两位数小数点
			_downloadBar.title = $"{obj * 100:0.00}%";
		}

		private void OnLatestVersionCheck(string obj)
		{
			if (Application.version != obj)
			{
				_latestVersionLabel.text =obj;
				_container.Navigate("entryDownload-container");
			}
			else
			{
				_container.Navigate(null);
			}
		}
		private void OnCancelDownload()
		{
			_container.Navigate(null);
		}
	}
}