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

public class Canvas_Library : MonoBehaviour
{
    List<UIDragSpawner> spawners;
    Transform scrollRectContent;

    static string thumbmailPath = "Library/LibraryThumbnails/";

    private void Awake()
    {
        spawners = new List<UIDragSpawner>();
        scrollRectContent = GetComponentInChildren<ScrollRect>().content;

        var models = Resources.LoadAll<SimulationModel>("Library/LibraryPrefab");
        var spawner = Resources.Load<UIDragSpawner>("UI/InventoryItem");
        var libraryTabs = GetComponentsInChildren<Toggle>();

        foreach ( var item in models)
        {
            var tmpSpawner = Instantiate(spawner);
            var thumbnailTexturePath = thumbmailPath + item.name;
            tmpSpawner.SetInfo(item, TextureToSprite(Resources.Load<Texture2D>(thumbnailTexturePath)));
            tmpSpawner.transform.SetParent(scrollRectContent);
            spawners.Add(tmpSpawner);
        }

        for (int i = 0; i < libraryTabs.Length; i++)
        {
            var index = i;
            libraryTabs[i].onValueChanged.AddListener(isOn => OnActiveTabChange(index, isOn));
            libraryTabs[i].onValueChanged.AddListener(isOn => libraryTabs[index].GetComponent<LibraryToggle>().OnToggle(isOn));
        }
    }

    public void OnActiveTabChange(int index, bool isOn)
    {
        if ( isOn)
        {
            foreach( var item in spawners)
            {
                item.gameObject.SetActive(true);
            }

            if ( index == 0)
            {
                return;
            }

            foreach( var item in spawners)
            {
                if ((int)item.targetModel.modelType != index)
                {
                    item.gameObject.SetActive(false);
                }
            }
        }
        
    }

    public Sprite TextureToSprite(Texture2D texture) 
        => Sprite.Create(texture, new Rect(0f, 0f, texture.width, texture.height), new Vector2(0.5f, 0.5f), 50f, 0, SpriteMeshType.FullRect);
}