using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class ModelHighlight : MonoBehaviour
{
    /// <summary>
    /// 高亮的颜色
    /// </summary>
    public Color highLightColor = new Color(0.5f, 0.5f, 0.5f, 1);

    /// <summary>
    /// 高亮边缘 宽度
    /// </summary>
    [Range(0.001f, 0.005f)]
    public float lineWidth = 0.005f;

    /// <summary>
    /// 高亮边缘 偏移调整
    /// </summary>
    [Range(0, 2)]
    public float lineAjustMeng = 0.5f;

    /// <summary>
    /// 闪烁效果速度 0则不闪烁
    /// </summary>
    [Range(0, 10)]
    public float highLightSpeed = 3f;

    /// <summary>
    /// 单例
    /// </summary>
    public static ModelHighlight instance;

    /// <summary>
    /// 高亮 skinmesh数组
    /// </summary>
    private SkinnedMeshRenderer[] highlightSkinnedRenderers;
    private SkinnedMeshRenderer[] existingSkinnedRenderers;

    /// <summary>
    /// 高亮 普通mesh数组
    /// </summary>
    private MeshRenderer[] highlightRenderers;
    private MeshRenderer[] existingRenderers;

    /// <summary>
    /// 不需要高亮模型  数组
    /// </summary>
    public GameObject[] hideHighlight;

    void Awake()
    {
        instance = this;
    }

    void Start()
    {
    }

    void Update()
    {

    }

    /// <summary>
    /// 模型高亮 
    /// </summary>
    /// <param name="target"> 目标高亮父节点 所有子节点都会高亮 </param>
    /// <param name="isHighlight"> 模型是否 需要高亮 true-高亮  false-关闭高亮 </param>
    public void SetModelHighlight(GameObject target ,bool isHighlight)
    {
        existingSkinnedRenderers = target.GetComponentsInChildren<SkinnedMeshRenderer>(true);
        highlightSkinnedRenderers = new SkinnedMeshRenderer[existingSkinnedRenderers.Length];
        Material highlightMat = CreatMaterial(highLightColor);

        for (int skinnedIndex = 0; skinnedIndex < existingSkinnedRenderers.Length; skinnedIndex++)
        {
            if (existingSkinnedRenderers[skinnedIndex].transform.name.Contains("_Highlight"))
            {
                continue;
            }
            if (isHighlight)
            {
                if (existingSkinnedRenderers[skinnedIndex].transform.Find(existingSkinnedRenderers[skinnedIndex].transform.name + "_Highlight"))
                {
                    existingSkinnedRenderers[skinnedIndex].transform.Find(existingSkinnedRenderers[skinnedIndex].transform.name + "_Highlight").gameObject.SetActive(true);
                    continue;
                }
                else
                {
                    SkinnedMeshRenderer existingSkinned = existingSkinnedRenderers[skinnedIndex];
                    if (ShouldIgnoreHighlight(existingSkinned))
                        continue;

                    GameObject newSkinnedHolder = new GameObject("SkinnedHolder");
                    newSkinnedHolder.name = existingSkinned.transform.name + "_Highlight";
                    newSkinnedHolder.transform.parent = existingSkinned.transform;
                    newSkinnedHolder.transform.localPosition = Vector3.zero;
                    newSkinnedHolder.transform.localEulerAngles = Vector3.zero;
                    newSkinnedHolder.transform.localScale = Vector3.one;
                    SkinnedMeshRenderer newSkinned = newSkinnedHolder.AddComponent<SkinnedMeshRenderer>();
                    Material[] materials = new Material[existingSkinned.sharedMaterials.Length];
                    for (int materialIndex = 0; materialIndex < materials.Length; materialIndex++)
                    {
                        materials[materialIndex] = highlightMat;
                    }

                    newSkinned.sharedMaterials = materials;
                    newSkinned.sharedMesh = existingSkinned.sharedMesh;
                    newSkinned.rootBone = existingSkinned.rootBone;
                    newSkinned.updateWhenOffscreen = existingSkinned.updateWhenOffscreen;
                    newSkinned.bones = existingSkinned.bones;

                    highlightSkinnedRenderers[skinnedIndex] = newSkinned;
                }
            }
            else
            {
                if (existingSkinnedRenderers[skinnedIndex].transform.Find(existingSkinnedRenderers[skinnedIndex].transform.name + "_Highlight"))
                {
                    existingSkinnedRenderers[skinnedIndex].transform.Find(existingSkinnedRenderers[skinnedIndex].transform.name + "_Highlight").gameObject.SetActive(false);
                }
            }
            
        }

        MeshFilter[] existingFilters = target.GetComponentsInChildren<MeshFilter>(true);
        existingRenderers = new MeshRenderer[existingFilters.Length];
        highlightRenderers = new MeshRenderer[existingFilters.Length];

        for (int filterIndex = 0; filterIndex < existingFilters.Length; filterIndex++)
        {
            if (existingFilters[filterIndex].transform.name.Contains("_Highlight"))
            {
                continue;
            }
            if (isHighlight)
            {
                if (existingFilters[filterIndex].transform.Find(existingFilters[filterIndex].transform.name + "_Highlight"))
                {
                    existingFilters[filterIndex].transform.Find(existingFilters[filterIndex].transform.name + "_Highlight").gameObject.SetActive(true);
                    continue;
                }
                else
                {
                    
                    MeshFilter existingFilter = existingFilters[filterIndex];
                    MeshRenderer existingRenderer = existingFilter.GetComponent<MeshRenderer>();

                    if (existingFilter == null || existingRenderer == null || ShouldIgnoreHighlight(existingFilter))
                        continue;

                    GameObject newFilterHolder = new GameObject("FilterHolder");
                    newFilterHolder.name = existingFilter.transform.name + "_Highlight";
                    newFilterHolder.transform.parent = existingFilter.transform;
                    newFilterHolder.transform.localPosition = Vector3.zero;
                    newFilterHolder.transform.localEulerAngles = Vector3.zero;
                    newFilterHolder.transform.localScale = Vector3.one;
                    MeshFilter newFilter = newFilterHolder.AddComponent<MeshFilter>();
                    newFilter.sharedMesh = existingFilter.sharedMesh;
                    MeshRenderer newRenderer = newFilterHolder.AddComponent<MeshRenderer>();

                    Material[] materials = new Material[existingRenderer.sharedMaterials.Length];
                    for (int materialIndex = 0; materialIndex < materials.Length; materialIndex++)
                    {
                        materials[materialIndex] = highlightMat;
                    }
                    newRenderer.sharedMaterials = materials;

                    highlightRenderers[filterIndex] = newRenderer;
                    existingRenderers[filterIndex] = existingRenderer;
                }
            }
            else
            {
                if (existingFilters[filterIndex].transform.Find(existingFilters[filterIndex].transform.name + "_Highlight"))
                {
                    existingFilters[filterIndex].transform.Find(existingFilters[filterIndex].transform.name + "_Highlight").gameObject.SetActive(false);
                }
            }
        }
    }

    /// <summary>
    /// 改变模型高亮颜色
    /// </summary>
    /// <param name="target"> 目标模型 所有子节点模型高亮颜色都会改变 </param>
    /// <param name="color"> 改变的颜色 RGB </param>
    public void ChangeModelHighlightColor(GameObject target, Color color)
    {
        existingSkinnedRenderers = target.GetComponentsInChildren<SkinnedMeshRenderer>(true);
        highlightSkinnedRenderers = new SkinnedMeshRenderer[existingSkinnedRenderers.Length];

        for (int skinnedIndex = 0; skinnedIndex < existingSkinnedRenderers.Length; skinnedIndex++)
        {
            if (existingSkinnedRenderers[skinnedIndex].transform.Find(existingSkinnedRenderers[skinnedIndex].transform.name + "_Highlight"))
            {
                existingSkinnedRenderers[skinnedIndex].transform.Find(existingSkinnedRenderers[skinnedIndex].transform.name + "_Highlight").
                    gameObject.GetComponent<MeshRenderer>().materials[0].SetColor("g_vOutlineColor", color);
                continue;
            }
        }

        MeshFilter[] existingFilters = target.GetComponentsInChildren<MeshFilter>(true);
        existingRenderers = new MeshRenderer[existingFilters.Length];
        highlightRenderers = new MeshRenderer[existingFilters.Length];

        for (int filterIndex = 0; filterIndex < existingFilters.Length; filterIndex++)
        {
            if (existingFilters[filterIndex].transform.Find(existingFilters[filterIndex].transform.name + "_Highlight"))
            {
                existingFilters[filterIndex].transform.Find(existingFilters[filterIndex].transform.name + "_Highlight").
                    gameObject.GetComponent<MeshRenderer>().materials[0].SetColor("g_vOutlineColor", color);
                continue;
            }
        }
    }

    /// <summary>
    /// 改变高亮模型闪烁的速度
    /// </summary>
    /// <param name="target"> 目标模型  所有子节点模型高亮闪烁速度都会改变 </param>
    /// <param name="speed"> 闪烁速度 0-停止闪烁  速度越大闪烁越快 </param>
    public void ChangeModelHighlightSpeed(GameObject target, float speed)
    {
        existingSkinnedRenderers = target.GetComponentsInChildren<SkinnedMeshRenderer>(true);
        highlightSkinnedRenderers = new SkinnedMeshRenderer[existingSkinnedRenderers.Length];

        for (int skinnedIndex = 0; skinnedIndex < existingSkinnedRenderers.Length; skinnedIndex++)
        {
            if (existingSkinnedRenderers[skinnedIndex].transform.Find(existingSkinnedRenderers[skinnedIndex].transform.name + "_Highlight"))
            {
                existingSkinnedRenderers[skinnedIndex].transform.Find(existingSkinnedRenderers[skinnedIndex].transform.name + "_Highlight").
                    gameObject.GetComponent<MeshRenderer>().materials[0].SetFloat("_FlickerTime", speed);
                continue;
            }
        }

        MeshFilter[] existingFilters = target.GetComponentsInChildren<MeshFilter>(true);
        existingRenderers = new MeshRenderer[existingFilters.Length];
        highlightRenderers = new MeshRenderer[existingFilters.Length];

        for (int filterIndex = 0; filterIndex < existingFilters.Length; filterIndex++)
        {
            if (existingFilters[filterIndex].transform.Find(existingFilters[filterIndex].transform.name + "_Highlight"))
            {
                existingFilters[filterIndex].transform.Find(existingFilters[filterIndex].transform.name + "_Highlight").
                    gameObject.GetComponent<MeshRenderer>().materials[0].SetFloat("_FlickerTime", speed);
                continue;
            }
        }
    }

    /// <summary>
    /// 需要 隐藏高亮模型操作
    /// </summary>
    /// <param name="component"></param>
    /// <returns></returns>
    private bool ShouldIgnoreHighlight(Component component)
    {
        return ShouldIgnore(component.gameObject);
    }

    private  bool ShouldIgnore(GameObject check)
    {
        for (int ignoreIndex = 0; ignoreIndex < hideHighlight.Length; ignoreIndex++)
        {
            if (check == hideHighlight[ignoreIndex])
                return true;
        }

        return false;
    }


    /// <summary>
    /// 生成材质球
    /// </summary>
    /// <param name="color"></param>
    /// <returns></returns>
    private Material CreatMaterial(Color color)
    {
        Material tempMat = new Material(Shader.Find("Highlight/Silhouette"));
        tempMat.SetColor("g_vOutlineColor", color);
        tempMat.SetFloat("g_flOutlineWidth", lineWidth);
        tempMat.SetFloat("g_flCornerAdjust", lineAjustMeng);
        tempMat.SetFloat("_FlickerTime", highLightSpeed);
        return tempMat;
    }
}