using System;
using UnityEngine;
using UnityEngine.UI;

namespace ParticleShaders
{
	public class ExamplesController : MonoBehaviour
	{
		[Serializable]
		public class Example
		{
			public string Name;

			[Multiline]
			public string Description;

			public Transform Prefab;
		}

		public Example[] m_Examples;

		public GameObject m_Canvas;

		public Slider m_ExamplesSlider;

		private Text m_Decription;

		private GameObject m_CurrentPrefab;

		private int m_CurrentExample;

		private void Start()
		{
			m_Decription = GameObject.Find("ExampleDescription").GetComponent<Text>();
			activateExample(0);
			if (m_ExamplesSlider != null)
			{
				m_ExamplesSlider.maxValue = m_Examples.Length - 1;
			}
		}

		public void NextExample()
		{
			if (m_Examples[m_CurrentExample].Prefab != m_CurrentPrefab && m_CurrentPrefab != null)
			{
				UnityEngine.Object.Destroy(m_CurrentPrefab);
			}
			m_CurrentExample++;
			ClampExampleCount();
			m_CurrentPrefab = UnityEngine.Object.Instantiate(m_Examples[m_CurrentExample].Prefab, Vector3.zero, Quaternion.identity).gameObject;
			if (m_Decription != null)
			{
				m_Decription.text = m_Examples[m_CurrentExample].Description;
			}
		}

		public void PreviousExample()
		{
			if (m_Examples[m_CurrentExample].Prefab != m_CurrentPrefab && m_CurrentPrefab != null)
			{
				UnityEngine.Object.Destroy(m_CurrentPrefab);
			}
			m_CurrentExample--;
			ClampExampleCount();
			m_CurrentPrefab = UnityEngine.Object.Instantiate(m_Examples[m_CurrentExample].Prefab, Vector3.zero, Quaternion.identity).gameObject;
			if (m_Decription != null)
			{
				m_Decription.text = m_Examples[m_CurrentExample].Description;
			}
		}

		private void ClampExampleCount()
		{
			if (m_CurrentExample < 0)
			{
				m_CurrentExample = m_Examples.Length - 1;
			}
			if (m_CurrentExample > m_Examples.Length - 1)
			{
				m_CurrentExample = 0;
			}
		}

		public void activateExampleFromSlider()
		{
			if (m_ExamplesSlider != null)
			{
				activateExample((int)m_ExamplesSlider.value);
			}
		}

		public void activateExample(int index)
		{
			if (m_Examples[index].Prefab != m_CurrentPrefab && m_CurrentPrefab != null)
			{
				UnityEngine.Object.Destroy(m_CurrentPrefab);
			}
			m_CurrentPrefab = UnityEngine.Object.Instantiate(m_Examples[index].Prefab, Vector3.zero, Quaternion.identity).gameObject;
			if (m_Decription != null)
			{
				m_Decription.text = m_Examples[index].Description;
			}
		}
	}
}