using System;
using System.Collections;
using System.Collections.Generic;
using UnityEditor;
using UnityEngine;
using SimpleInventorySystem;
using UnityEngine.UI;

public class Photoshoot : MonoBehaviour
{
    public string OutputPath;
    public string itemPrefabPath;
    public Camera camera;
    public GameObject items;

    private void Awake()
    {
        if (camera == null)
        {
            camera = GetComponent<Camera>();
        }

        if (String.IsNullOrEmpty(OutputPath))
        {
            Debug.LogError("Output Path should not be empty");
        }
    }
    private void OnValidate()
    {

    }

    public void ProcessScreenshots()
    {
        StartCoroutine(Screenshot());
    }

    public void ProcessScreenshotsFaster()
    {
        ScreenshotFaster();
    }

    private IEnumerator Screenshot()
    {
        List<GameObject> gameObjects = new List<GameObject>();
        List<GameObject> activeGameObjects = new List<GameObject>();

        for (int i = 0; i < items.transform.childCount; i++)
        {
            GameObject obj = items.transform.GetChild(i).gameObject;
            ItemUI item = obj.GetComponentInChildren<ItemUI>();
            if (obj.activeSelf)
            {
                activeGameObjects.Add(obj);
            }
            obj.SetActive(false);
            if (item != null)
            {
                gameObjects.Add(obj);
            }
        }
        int count = gameObjects.Count;
        Debug.Log($"Screenshot: Found {count} items.");

        for (int i = 0; i < gameObjects.Count; i++)
        {
            GameObject obj = gameObjects[i];
            ItemUI item = gameObjects[i].GetComponentInChildren<ItemUI>();

            obj.gameObject.SetActive(true);

            yield return null;

            TakeScreenshot($"{Application.dataPath}/{OutputPath}/{item.itemName}_icon.png");

            yield return null;
            obj.gameObject.SetActive(false);

            Sprite s = AssetDatabase.LoadAssetAtPath<Sprite>($"Assets/{OutputPath}/{item.itemName}_icon.png");
            if (s != null)
            {
                item.image.sprite = s;
                EditorUtility.SetDirty(item);
            }

            Debug.Log($"Screenshot: {i + 1}/{count}");

            yield return null;
        }

        for (int i = 0; i < activeGameObjects.Count; i++)
        {
            GameObject obj = activeGameObjects[i];
            obj.SetActive(true);
        }
        Debug.Log($"Screenshot: Complete");
    }
    private void ScreenshotFaster()
    {
        List<GameObject> gameObjects = new List<GameObject>();
        List<GameObject> activeGameObjects = new List<GameObject>();

        for (int i = 0; i < items.transform.childCount; i++)
        {
            GameObject obj = items.transform.GetChild(i).gameObject;
            ItemUI item = obj.GetComponentInChildren<ItemUI>();
            if (obj.activeSelf)
            {
                activeGameObjects.Add(obj);
            }
            obj.SetActive(false);
            if (item != null)
            {
                gameObjects.Add(obj);
            }
        }
        int count = gameObjects.Count;
        Debug.Log($"Screenshot: Found {count} items.");

        for (int i = 0; i < gameObjects.Count; i++)
        {
            GameObject obj = gameObjects[i];
            ItemUI item = gameObjects[i].GetComponentInChildren<ItemUI>();

            TakeScreenshotFaster($"{Application.dataPath}/{OutputPath}/{item.itemName}_icon.png", obj);

            // TODO: Hopefully find a way to automatically assign to prefab
           /* Sprite s = AssetDatabase.LoadAssetAtPath<Sprite>($"Assets/{OutputPath}/{item.itemName}_icon.png");
            if (s != null)
            {
                item.transform.Find("Image").GetComponent<UnityEngine.UI.Image>().sprite = s;
                EditorUtility.SetDirty(item);
            }

            Debug.Log($"Screenshot: {i + 1}/{count}");*/

        }

        for (int i = 0; i < activeGameObjects.Count; i++)
        {
            GameObject obj = activeGameObjects[i];
            obj.SetActive(true);
        }
        Debug.Log($"Screenshot: Complete");
    }

    void TakeScreenshotFaster(string fullPath, GameObject obj)
    {
        obj.SetActive(true);

        RenderTexture rt = new RenderTexture(256, 256, 24);
        camera.targetTexture = rt;
        Texture2D screenShot = new Texture2D(256, 256, TextureFormat.RGBA32, false);
        camera.Render();
        RenderTexture.active = rt;
        screenShot.ReadPixels(new Rect(0, 0, 256, 256), 0, 0);
        camera.targetTexture = null;
        RenderTexture.active = null;

        if (Application.isEditor)
        {
            DestroyImmediate(rt);
        }
        else
        {
            Destroy(rt);
        }

        byte[] bytes = screenShot.EncodeToPNG();
        System.IO.File.WriteAllBytes(fullPath, bytes);

#if UNITY_EDITOR
        AssetDatabase.Refresh();
#endif

        obj.SetActive(false);
    }

    void TakeScreenshot(string fullPath)
    {
        RenderTexture rt = new RenderTexture(256, 256, 24);
        camera.targetTexture = rt;
        Texture2D screenShot = new Texture2D(256, 256, TextureFormat.RGBA32, false);
        camera.Render();
        RenderTexture.active = rt;
        screenShot.ReadPixels(new Rect(0, 0, 256, 256), 0, 0);
        camera.targetTexture = null;
        RenderTexture.active = null;

        if (Application.isEditor)
        {
            DestroyImmediate(rt);
        }
        else
        {
            Destroy(rt);
        }

        byte[] bytes = screenShot.EncodeToPNG();
        System.IO.File.WriteAllBytes(fullPath, bytes);

#if UNITY_EDITOR
        AssetDatabase.Refresh();
#endif
    }
}