using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.SceneManagement;

public class sceneLoadSystem : MonoBehaviour
{
    public GameObject mainMenuContent;
    public GameObject sceneLoadMenu;
    public GameObject sceneSlotPrefab;
    public Transform sceneSlotsParent;
    public Scrollbar mainScrollbar;
    public ScrollRect mainScrollRect;
    public List<sceneInfo> sceneInfoList = new List<sceneInfo> ();

    public int startingSceneIndex = 1;
    public bool addSceneNumberToName = true;

    public bool instantiateScenePanelsActivated = true;


    public bool useLoadScreen;

    public int loadScreenScene = 1;

    public bool useLastSceneIndexAsLoadScreen = true;

    public string sceneToLoadAsyncPrefsName = "SceneToLoadAsync";

    public bool checkLoadingScreenSceneConfigured = true;

    public string loadingScreenSceneName = "Loading Screen Scene";


    void Start ()
    {
        if (instantiateScenePanelsActivated) {
            int demoNumber = 0;

            int sceneInfoListCount = sceneInfoList.Count;

            for (int i = 0; i < sceneInfoListCount; i++) {
                if (sceneInfoList [i].addSceneToList) {
                    GameObject newSceneSlot = (GameObject)Instantiate (sceneSlotPrefab, Vector3.zero, Quaternion.identity);
                    newSceneSlot.name = "Scene Slot " + (i + 1);
                    newSceneSlot.transform.SetParent (sceneSlotsParent);
                    newSceneSlot.transform.localScale = Vector3.one;
                    newSceneSlot.transform.position = newSceneSlot.transform.position;

                    sceneSlotInfo newSceneSlotInfo = newSceneSlot.GetComponent<sceneSlot> ().sceneSlotInfo;

                    if (addSceneNumberToName) {
                        newSceneSlotInfo.sceneNameText.text = (demoNumber + 1) + " - " + sceneInfoList [i].Name;
                    } else {
                        newSceneSlotInfo.sceneNameText.text = sceneInfoList [i].Name;
                    }

                    if (sceneInfoList [i].titleFontSize > 0) {
                        newSceneSlotInfo.sceneNameText.fontSize = sceneInfoList [i].titleFontSize;
                    }

                    newSceneSlotInfo.sceneDescriptionText.text = sceneInfoList [i].sceneDescription;

                    newSceneSlotInfo.sceneDescriptionText.fontSize = sceneInfoList [i].fontSize;

                    newSceneSlotInfo.sceneImage.texture = sceneInfoList [i].sceneImage;

                    sceneInfoList [i].sceneButton = newSceneSlotInfo.sceneButton;

                    demoNumber++;
                }
            }

            sceneSlotPrefab.SetActive (false);

            StartCoroutine (SetValue ());
        }
    }

    public void loadScene (Button buttonToCheck)
    {
        mainMenuContent.SetActive (false);

        int sceneInfoListCount = sceneInfoList.Count;

        for (int i = 0; i < sceneInfoListCount; i++) {
            if (sceneInfoList [i].sceneButton == buttonToCheck) {
                GKC_Utils.loadScene (sceneInfoList [i].sceneNumber, useLoadScreen, loadScreenScene, sceneToLoadAsyncPrefsName,
                    useLastSceneIndexAsLoadScreen, checkLoadingScreenSceneConfigured, loadingScreenSceneName);
            }
        }
    }

    IEnumerator SetValue ()
    {
        yield return new WaitForEndOfFrame ();

        sceneLoadMenu.SetActive (true);

        mainScrollRect.verticalNormalizedPosition = 0f;
        mainScrollRect.horizontalNormalizedPosition = 0.5f;
        mainScrollRect.horizontalNormalizedPosition = 0.5f;
        mainScrollbar.value = 0;

        sceneLoadMenu.SetActive (false);

        yield return null;
    }

    public void setSceneNumberInOrder ()
    {
        int sceneInfoListCount = sceneInfoList.Count;

        for (int i = 0; i < sceneInfoListCount; i++) {
            sceneInfoList [i].sceneNumber = (i + startingSceneIndex);
        }

        updateComponent ();
    }

    public void setSceneNumberInOrderByIndex (int index)
    {
        int currentIndex = 0;

        int sceneInfoListCount = sceneInfoList.Count;

        for (int i = 0; i < sceneInfoListCount; i++) {
            if (i >= index) {
                sceneInfoList [i].sceneNumber = (currentIndex + startingSceneIndex);

                currentIndex++;
            }
        }

        updateComponent ();
    }

    public void enableAddSceneToListByIndex (int index)
    {
        int sceneInfoListCount = sceneInfoList.Count;

        for (int i = 0; i < sceneInfoListCount; i++) {
            if (i >= index) {
                sceneInfoList [i].addSceneToList = true;
            }
        }

        updateComponent ();
    }

    public void disableAddSceneToListByIndex (int index)
    {
        int sceneInfoListCount = sceneInfoList.Count;

        for (int i = 0; i < sceneInfoListCount; i++) {
            if (i >= index) {
                sceneInfoList [i].addSceneToList = false;
            }
        }

        updateComponent ();
    }

    public void updateComponent ()
    {
        GKC_Utils.updateComponent (this);

        GKC_Utils.updateDirtyScene ("Update Scene Load System", gameObject);
    }

    [System.Serializable]
    public class sceneInfo
    {
        public string Name;
        [TextArea (10, 25)] public string sceneDescription;
        public int sceneNumber;
        public Texture sceneImage;
        public Button sceneButton;
        public bool addSceneToList = true;

        public int fontSize = 20;

        public int titleFontSize = 0;
    }

    [System.Serializable]
    public class sceneSlotInfo
    {
        public Text sceneNameText;
        public Text sceneDescriptionText;
        public RawImage sceneImage;
        public Button sceneButton;
    }
}