using MathNet.Numerics;
using o0.Wave.RealTime.Old;
using ShatterToolkit;
using ShatterToolkit.Helpers;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public enum FruitType
{
    Normal,
    Bomb,
    FrozenBanana,
    ComboPomegranate,
    RainbowApple
}

public class FruitBehavior : MonoBehaviour
{
    public const float ArrivingDist = 5.0f;
    [SerializeField] public Material IceMat_NoTex = null;
    [SerializeField] public Material IceMat_Tex = null;
    private List<List<Material>> MatBeforeFrost = new List<List<Material>>();
    
    private float Trajectory_coef_a; // y = ax^2 + bx + c
    private float Trajectory_coef_b; // y = ax^2 + bx + c
    private float Trajectory_coef_c; // y = ax^2 + bx + c
    private Vector3 Original_position;
    private Vector3 Target_position;
    private float ExistingTime = 0f;
    private float TrajectoryTime = 0f;
    private float TrajectoryLifetime = 0f;
    public bool bMoveAlongTrajectory = true;

    private Vector3 SpinAxis;
    private float SpinSpeed;

    private FruitType Type;
    private GamingManager _gamingManager;

    private Material PostSplitMat;
    private GameObject JuiceSplash;
    public Sprite JuiceStain;

    public delegate void ArriveDelegate(FruitBehavior fb);
    public delegate void OnHitDelegete(FruitBehavior fb, Vector3 hit_p, bool bCritical);

    public event ArriveDelegate OnArrive;
    public event OnHitDelegete OnHitEvent;

    private GameObject MeshParent;

    public FruitType GetFruitType()
    {
        return Type;
    }

    // Which meshes should be shattered
    private List<GameObject> ToShatter = new List<GameObject>();

    void Awake()
    {

    }

    private void Start()
    {
    }

    // Update is called once per frame
    void Update()
    {
        if (!_gamingManager.IsGamePaused())
        {
            ExistingTime += Time.deltaTime;

            if (transform.position.z < ArrivingDist)
            {
                OnArrive.Invoke(this);
            }

            if (Type == FruitType.ComboPomegranate || Type == FruitType.RainbowApple || Type == FruitType.FrozenBanana)
            {
                MeshRenderer[] renderers = GetComponentsInChildren<MeshRenderer>();
                foreach (var renderer in renderers)
                {
                    Material[] mats = renderer.materials;                   
                    foreach (var mat in mats)
                    {
                        float sin_x = ExistingTime * Mathf.PI * 2f;
                        float sin_y = Mathf.Sin(sin_x);
                        float value = (sin_y + 1f) * 0.5f * 0.65f;
                        Color flicker = new Color(value, value, value);
                        mat.SetColor("_EmissionColor", flicker);
                    }
                }
                
            }
        }

        // Moves along trajectory, if not in combo pomegranate time
        if (bMoveAlongTrajectory)
        {
            TrajectoryTime += Time.deltaTime;
            float parabola_x = Mathf.Lerp(Original_position.z, Target_position.z, TrajectoryTime / TrajectoryLifetime);
            float parabola_y = Trajectory_coef_a * parabola_x * parabola_x + Trajectory_coef_b * parabola_x + Trajectory_coef_c;
            float pos_x = Mathf.Lerp(Original_position.x, Target_position.x, TrajectoryTime / TrajectoryLifetime);
            gameObject.transform.position = new Vector3(pos_x, parabola_y, parabola_x);

            // Random spinning
            transform.Rotate(SpinAxis, Time.deltaTime * SpinSpeed);
        }
    }
    //枪设备下设置碰撞层和tag
    string tagToSet = "Fruit";
    string layerToSet = "Target1";
    public void Init(FruitType ty, GamingManager manager, Vector3 spawnLocation, Vector3 targetLocation, float timeToArraive)
    {
        _gamingManager = manager;
        Type = ty;
        Original_position = spawnLocation;
        Target_position = targetLocation;
        GamingValues.CalcTrajectoryEquationCoef(spawnLocation, targetLocation, out Trajectory_coef_a, out Trajectory_coef_b, out Trajectory_coef_c);
        TrajectoryLifetime = timeToArraive;

        GameObject fruit = _gamingManager.gameObject.GetComponent<FruitTypeList>().GetFruit(ty, true, out PostSplitMat, out JuiceSplash, out JuiceStain);
        MeshParent = Instantiate(fruit, gameObject.transform);

        //SphereCollider sphr_collider = meshParent.GetComponent<SphereCollider>();
        //if (sphr_collider)
        //{
        //    SphereCollider _collider = gameObject.AddComponent<SphereCollider>();
        //    _collider.isTrigger = true;
        //    _collider.radius = sphr_collider.radius;
        //}

        if (GlobalData.MyDeviceMode == DeviceMode.Gun) {
            gameObject.tag = tagToSet;
            gameObject.layer = LayerMask.NameToLayer(layerToSet);
            MeshParent.tag = tagToSet;
            MeshParent.layer = LayerMask.NameToLayer(layerToSet);
        }
        

        Rigidbody _body = gameObject.AddComponent<Rigidbody>();

        _body.isKinematic = true;
        _body.useGravity = false;
        //Destroy(GetComponent<Collider>());

        // Find out which meshes will participate in shattering
        for (int i = 0; i < MeshParent.transform.childCount; i++)
        {
            GameObject go = MeshParent.transform.GetChild(i).gameObject;
            if (go.CompareTag("ShatterIncluded"))
            {

                if (GlobalData.MyDeviceMode == DeviceMode.Gun) {
                    go.tag = tagToSet;
                    go.layer = LayerMask.NameToLayer(layerToSet);
                }       

                ShatterTool st = go.AddComponent<ShatterTool>();
                PieceRemover pr = go.AddComponent<PieceRemover>();
                st.GenerationLimit = 2;
                pr.startAtGeneration = 2;
                pr.timeDelay = 1f;
                st.SendPostSplitMessage = true;
                go.AddComponent<TargetUvMapper>();
                ToShatter.Add(go);
            }

            // Backup the origin mats of the fruit, used to recover from forst
            MeshRenderer renderer = go.GetComponent<MeshRenderer>();
            MatBeforeFrost.Add(new List<Material>());
            foreach (var mat in renderer.materials)
            {
                MatBeforeFrost[i].Add(mat);
            }
    
        }

        // If this is a ComboPomegarante, add a specialized behavior component
        if (Type == FruitType.ComboPomegranate)
        {
            gameObject.AddComponent<ComboPomegaranteBehavior>().Init(_gamingManager);
        }

        // Get a random rotation axis and speed
        SpinAxis = Random.rotation * Vector3.forward;
        SpinSpeed = Random.Range(90f, 180f);
    }
    private void OnTriggerEnter(Collider other)
    {
        //水果爆炸不拦截
        // If is hit by a fullscreen clearing bubble
        FullscreenClearBubbleBehavior bubble = other.gameObject.GetComponent<FullscreenClearBubbleBehavior>();
        if (bubble)
        {
            OnHitEvent.Invoke(this, gameObject.transform.position, false);
            return;
        }
        //拦截子弹碰撞
        if (GlobalData.MyDeviceMode == DeviceMode.Gun) return;
        // If is hit by an arrow
        ArrowBehavior arrow = other.gameObject.GetComponent<ArrowBehavior>();
        if (arrow)
        {
            arrow.HitAFruit();
            float fruit_dist = gameObject.transform.position.magnitude;
            Vector3 point_along_arrow_dir = (arrow.transform.position.normalized * fruit_dist);
            if ((point_along_arrow_dir - gameObject.transform.position).magnitude <= 1f)
            {
                OnHitEvent.Invoke(this, other.ClosestPoint(gameObject.transform.position), true);
            }
            else
            {
                OnHitEvent.Invoke(this, other.ClosestPoint(gameObject.transform.position), false);
            }
            return;
        }

    }
    public void OnHitCollision(Collider other, ArrowBehavior shootObj)
    {
        // If is hit by an arrow
        if (shootObj)
        {
            shootObj.HitAFruit(); 
            float fruit_dist = gameObject.transform.position.magnitude;
            Vector3 point_along_arrow_dir = (shootObj.transform.position.normalized * fruit_dist);
            if ((point_along_arrow_dir - gameObject.transform.position).magnitude <= 1f)
            {
                OnHitEvent.Invoke(this, other.ClosestPoint(gameObject.transform.position), true);
            }
            else
            {
                OnHitEvent.Invoke(this, other.ClosestPoint(gameObject.transform.position), false);
            }
            return;
        }

        // If is hit by a fullscreen clearing bubble
        FullscreenClearBubbleBehavior bubble = other.gameObject.GetComponent<FullscreenClearBubbleBehavior>();
        if (bubble)
        {
            OnHitEvent.Invoke(this, gameObject.transform.position, false);
            return;
        }
    }

    // Play smashing effect, including shattering the mesh and instantiate an smashing audio which will be delay-destroyed
    public void SmashEffect()
    {
        foreach (var go in ToShatter)
        {
            Rigidbody rb = go.AddComponent<Rigidbody>();
            rb.mass = 1.0f; // add rigidbody right before shatter this mesh, then it will be destroyed along with the gameobject
            rb.angularDrag = 5f;
            PostSplitBehaviour psb = go.AddComponent<PostSplitBehaviour>();
            psb.PostSplitMat = PostSplitMat;
            psb.ExplosionPosition = gameObject.transform.position;
            go.SendMessage("Shatter", gameObject.transform.position);
        }

        GameObject fruitJuice = Instantiate(JuiceSplash, gameObject.transform.position, Quaternion.identity);
        AudioSource audio = fruitJuice.AddComponent<AudioSource>();
        audio.clip = _gamingManager.GetAudioManager().GetRandomSound((Type == FruitType.Bomb) ? SoundCategory.BombExplode : SoundCategory.FruitSmash);
        if (UserSettings.ins.openEffect) audio.Play();
        GamingManager.DelayDestroy(_gamingManager, fruitJuice, (Type == FruitType.Bomb) ? 3f : 1.5f);
        Destroy(gameObject);
    }

    public void Frost()
    {
        Debug.Log("Start Frost");
        for (int i = 0; i < MeshParent.transform.childCount; i++)
        {
            GameObject go = MeshParent.transform.GetChild(i).gameObject;          
            MeshRenderer renderer = go.GetComponent<MeshRenderer>();
            Material[] iced_mats = new Material[renderer.materials.Length];
            for (int j = 0; j < renderer.materials.Length; j++)
            {
                Color originColor = renderer.materials[j].color;
                if (renderer.materials[j].mainTexture == null)
                {
                    iced_mats[j] = new Material(IceMat_Tex);
                }
                else
                {
                    iced_mats[j] = new Material(IceMat_NoTex);
                    iced_mats[j].SetColor("_MainCol", originColor);
                }               
            }
            renderer.materials = iced_mats;
        }
    }

    public void UnFrost()
    {
        for (int i = 0; i < MeshParent.transform.childCount; i++)
        {
            GameObject go = MeshParent.transform.GetChild(i).gameObject;
            MeshRenderer renderer = go.GetComponent<MeshRenderer>();
            Material[] new_mats = new Material[renderer.materials.Length];
            for (int j = 0; j < renderer.materials.Length; j++)
            {
                new_mats[j] = MatBeforeFrost[i][j];
            }
            renderer.materials = new_mats;
        }
    }
}