using System;
using UnityEngine;
using UnityEngine.UI;

namespace LapinerTools.uMyGUI
{
	public class uMyGUI_TexturePicker : MonoBehaviour
	{
		[SerializeField]
		private GameObject m_texturePrefab;

		[SerializeField]
		private GameObject m_selectionPrefab;

		[SerializeField]
		private float m_offsetStart;

		[SerializeField]
		private float m_offsetEnd;

		[SerializeField]
		private float m_padding = 4f;

		[SerializeField]
		private Action<int> m_buttonCallback;

		private Texture2D[] m_textures = new Texture2D[0];

		private RectTransform m_rectTransform;

		private float m_elementSize = 1f;

		private GameObject m_selectionInstance;

		private GameObject[] m_instances = new GameObject[0];

		public GameObject TexturePrefab
		{
			get
			{
				return m_texturePrefab;
			}
			set
			{
				m_texturePrefab = value;
			}
		}

		public GameObject SelectionPrefab
		{
			get
			{
				return m_selectionPrefab;
			}
			set
			{
				m_selectionPrefab = value;
			}
		}

		public float OffsetStart
		{
			get
			{
				return m_offsetStart;
			}
			set
			{
				m_offsetStart = value;
			}
		}

		public float OffsetEnd
		{
			get
			{
				return m_offsetEnd;
			}
			set
			{
				m_offsetEnd = value;
			}
		}

		public float Padding
		{
			get
			{
				return m_padding;
			}
			set
			{
				m_padding = value;
			}
		}

		public Action<int> ButtonCallback
		{
			get
			{
				return m_buttonCallback;
			}
			set
			{
				m_buttonCallback = value;
			}
		}

		public Texture2D[] Textures
		{
			get
			{
				return m_textures;
			}
			set
			{
				m_textures = value;
			}
		}

		private RectTransform RTransform
		{
			get
			{
				return (!(m_rectTransform != null)) ? (m_rectTransform = GetComponent<RectTransform>()) : m_rectTransform;
			}
		}

		public GameObject[] Instances
		{
			get
			{
				return m_instances;
			}
		}

		public void SetSelection(int p_selectionIndex)
		{
			if (m_selectionPrefab != null)
			{
				if (p_selectionIndex < 0 || p_selectionIndex >= m_instances.Length)
				{
					UnityEngine.Object.Destroy(m_selectionInstance);
					m_selectionInstance = null;
					return;
				}
				if (m_selectionInstance == null)
				{
					m_selectionInstance = UnityEngine.Object.Instantiate(m_selectionPrefab);
				}
				else
				{
					RectTransform component = m_selectionInstance.GetComponent<RectTransform>();
					Vector2 anchoredPosition = component.anchoredPosition;
					anchoredPosition.x = m_selectionPrefab.GetComponent<RectTransform>().anchoredPosition.x;
					component.anchoredPosition = anchoredPosition;
				}
				SetRectTransformPosition(m_selectionInstance.GetComponent<RectTransform>(), p_selectionIndex, m_elementSize);
			}
			else
			{
				Debug.LogError("uMyGUI_TexturePicker: SetSelection: you have passed a non negative selection index '" + p_selectionIndex + "', but the SelectionPrefab was not provided in the inspector or via script!");
			}
		}

		public void SetTextures(Texture2D[] p_textures, int p_selectedIndex)
		{
			if (m_texturePrefab != null)
			{
				m_textures = p_textures;
				UnityEngine.Object.Destroy(m_selectionInstance);
				for (int i = 0; i < m_instances.Length; i++)
				{
					UnityEngine.Object.Destroy(m_instances[i]);
				}
				m_instances = new GameObject[p_textures.Length];
				float num = 0f;
				for (int j = 0; j < p_textures.Length; j++)
				{
					m_instances[j] = UnityEngine.Object.Instantiate(m_texturePrefab);
					RectTransform component = m_instances[j].GetComponent<RectTransform>();
					m_elementSize = component.rect.width;
					SetRectTransformPosition(component, j, m_elementSize);
					RawImage rawImage = TryFindComponent<RawImage>(m_instances[j]);
					if (rawImage != null)
					{
						rawImage.texture = p_textures[j];
					}
					else
					{
						Debug.LogError("uMyGUI_TexturePicker: SetTextures: TexturePrefab must have a RawImage component attached (can be in children).");
					}
					if (m_buttonCallback != null)
					{
						Button button = TryFindComponent<Button>(m_instances[j]);
						if (button != null)
						{
							int indexCopy = j;
							button.onClick.AddListener(delegate
							{
								m_buttonCallback(indexCopy);
							});
						}
					}
					num = component.anchoredPosition.x + m_elementSize;
					if (j == p_selectedIndex)
					{
						if (m_selectionPrefab != null)
						{
							m_selectionInstance = UnityEngine.Object.Instantiate(m_selectionPrefab);
							SetRectTransformPosition(m_selectionInstance.GetComponent<RectTransform>(), j, m_elementSize);
						}
						else
						{
							Debug.LogError("uMyGUI_TexturePicker: SetTextures: you have passed a non negative selection index '" + p_selectedIndex + "', but the SelectionPrefab was not provided in the inspector or via script!");
						}
					}
				}
				RTransform.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, num - RTransform.rect.xMin + m_offsetEnd);
			}
			else
			{
				Debug.LogError("uMyGUI_TexturePicker: SetTextures: you must provide the TexturePrefab in the inspector or via script!");
			}
		}

		private void OnDestroy()
		{
			m_buttonCallback = null;
		}

		private void SetRectTransformPosition(RectTransform p_transform, int p_positionIndex, float p_size)
		{
			p_transform.SetParent(RTransform, false);
			Vector2 anchoredPosition = p_transform.anchoredPosition;
			anchoredPosition.x += m_offsetStart + (float)p_positionIndex * (p_size + m_padding);
			p_transform.anchoredPosition = anchoredPosition;
		}

		private T TryFindComponent<T>(GameObject p_object) where T : Component
		{
			T val = p_object.GetComponent<T>();
			if (val == null)
			{
				T[] componentsInChildren = p_object.GetComponentsInChildren<T>(true);
				if (componentsInChildren.Length > 0)
				{
					val = componentsInChildren[0];
				}
			}
			return val;
		}
	}
}