using System;
using System.Collections;
using System.IO;
using UnityEngine;
using UnityEngine.Networking;
using UnityEngine.UI;

public class BackgroundImageHandler : MonoBehaviour
{
    [SerializeField] private string BackgroundImage;
    [SerializeField] private RawImage Background;
    [SerializeField] private RawImage ModListBackground;
    [SerializeField] private RawImage OriginalBackground;
    [SerializeField] private string ImagePath;

    void Start() {
        ImagePath = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData)+@"\Schaken-Mods®\Singularity\Background.png";
        if (File.Exists(ImagePath)) {
            StartCoroutine(LoadImage(ImagePath, Background, false));
            StartCoroutine(LoadImage(ImagePath, ModListBackground, false));
        }
    }

    public void SetNewImageFromClipboard() {
        if (!GUIUtility.systemCopyBuffer.Contains("http") ) {
			Background.texture = ClipboardImage.Copy();
			Background.SetNativeSize();
			Background.SizeToParent();
            SaveImageToFile(Background.texture as Texture2D);
		} else {
		    StartCoroutine(LoadImage(GUIUtility.systemCopyBuffer, Background));
            StartCoroutine(LoadImage(GUIUtility.systemCopyBuffer, ModListBackground));
		}
	}

    public void ImportImageDragNDrop(string file) {
        StartCoroutine(LoadImage(file, Background));
        StartCoroutine(LoadImage(file, ModListBackground));
    }

	private IEnumerator LoadImage(string B, RawImage A, bool TF = true) {
		UnityWebRequest WWW = UnityWebRequestTexture.GetTexture(B);
		yield return WWW.SendWebRequest();
		if (WWW.result != UnityWebRequest.Result.ConnectionError) {
			A.texture = DownloadHandlerTexture.GetContent(WWW);
			A.SetNativeSize();
			A.SizeToParent();
			A.gameObject.SetActive(true);
            if (TF)
                SaveImageToFile(A.texture as Texture2D);
        }
    }

    public void SaveImageToFile(Texture2D texture) {
        if (texture != null) {
            byte[] pngData = texture.EncodeToPNG();
            if (File.Exists(ImagePath)) {
                File.Delete(ImagePath);
            }
            File.WriteAllBytes(ImagePath, pngData);
        } else {
            Debug.LogError("The texture is null.");
        }
    }

    public void ApplyOriginalImageToBackground() {
        if (OriginalBackground != null && Background != null) {
            Background.texture = OriginalBackground.texture;
        } else {
            Debug.LogError("originalImage or backgroundImage is not assigned.");
        }
        if (File.Exists(ImagePath)) {
            File.Delete(ImagePath);
        }
    }
}