using System;
using System.Collections;
using System.IO;
using Newtonsoft.Json;
using TMPro;
using UnityEngine;
using UnityEngine.Networking;
using UnityEngine.UI;

public class UpdateJSON {
    [JsonProperty("current_version")] public float Version { get; set; }
    [JsonProperty("download_link")] public string DownloadLink { get; set; }
}
public class UpdateChecker : MonoBehaviour
{
    [SerializeField] private GameObject UpdateCover;
    [SerializeField] private string JSONURL;
    [SerializeField] private TextMeshProUGUI Message;
    [SerializeField] private GameObject ProgressContainer;
    [SerializeField] private Slider Progress;
    [SerializeField] private TextMeshProUGUI ProgressText;
    UpdateJSON UpdateJSON;
    bool doDownload = false;
    // Start is called before the first frame update
    void Start() {
        StartCoroutine(GetUpdateA());        
    }

    private IEnumerator GetUpdateA() {
        UpdateCover.SetActive(true);
        Message.text = "Checking for update...";
		using (UnityWebRequest uwr = UnityWebRequest.Get(JSONURL)) {
			yield return uwr.SendWebRequest();
			if (uwr.result == UnityWebRequest.Result.ConnectionError) {
				Debug.Log("Error While Sending for User info: " + uwr.error);
			} else {
                UpdateJSON JSON = JsonConvert.DeserializeObject<UpdateJSON>(uwr.downloadHandler.text);
                UpdateJSON = JSON;
                if (JSON.Version > float.Parse(Application.version)) {// Update Needed!
                    float OnlineVersion = JSON.Version;
                    string message = $"This application is out of date. Please update.\nCurrent Version: {Application.version}\nAvailable Version: {OnlineVersion}\n(Click anywhere to Download and install)";
                    Message.text = message;
                    doDownload = true;

                } else if (JSON.Version == float.Parse(Application.version)) {// We are up to date!
                    UpdateCover.SetActive(false);
                }
            }
        }
    }

    public void DownloadUpdate() {
        if (doDownload) {
            StartCoroutine(DownloadUpdateA());
        }
    }

    private IEnumerator DownloadUpdateA() {
		Debug.Log("DownloadFileA Called");
		string path = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData)+@"\Schaken-Mods®\Mod Downloader\";
		string fullPath = Path.Combine(path, "Update.exe");
		
        var dh = new DownloadHandlerFile(fullPath) {
            removeFileOnAbort = true
        };
        var uwr = new UnityWebRequest(UpdateJSON.DownloadLink, UnityWebRequest.kHttpVerbGET) {
            downloadHandler = dh
        };

        var operation = uwr.SendWebRequest();
		Debug.Log("Web request sent");
		while (!operation.isDone) {
            ProgressContainer.SetActive(true);
            Progress.value = uwr.downloadProgress;
            ProgressText.text = string.Format("{0:P1}", uwr.downloadProgress);
			yield return new WaitForSeconds(0.5f);
		}
		if (uwr.result == UnityWebRequest.Result.Success) {
            Progress.value = 1;
            ProgressText.text = "Starting Install...";
		} else {
			Debug.LogError($"Download failed: {uwr.error}");
		}
		yield return new WaitForSeconds(0.5f);
		Debug.Log("Writing File");
		uwr.Dispose();
        Application.OpenURL(fullPath);
        yield return new WaitForSeconds(2.0f);

#if !UNITY_EDITOR
        Application.Quit();
#endif

    }
}