//============= Copyright (c) Ludic GmbH, All rights reserved. ==============
//
// Purpose: Part of the My Behaviour Tree Controller Code
//
//=============================================================================

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

#if UNITY_EDITOR
using UnityEditor;
[CustomEditor(typeof(NamedRenderer))]
public class NamedRendererInspector : ComponentHandlerInspector {
}
#endif

[System.Serializable]
public class NamedRenderer : ComponentHandler {
    public override string TypeLabel () {
        return "Renderer";
    }

    public override string ContentLabel() {
        UpdateComponent();
        if (rendererComponents.Length > 0) {
            Renderer r = rendererComponents[0];
            MeshFilter mf = rendererComponents[0].GetComponent<MeshFilter>();
            if (useMeshNameOrMaterialNameForName) {
                if (mf != null) {
                    return mf.sharedMesh.name;
                }
                if (r != null) {
                    return r.sharedMaterial.name;
                }
            }
        }
        return "";
    }


    public override void UpdateComponent() {
        base.UpdateComponent();
        rendererComponents = GetComponentsInChildren<Renderer>();

        changeColorCutoff = hasMaterialCutoff;
        changeColorAlpha = hasMaterialAlpha;
    }

    public Renderer[] rendererComponents = new Renderer[0];

    public bool instantiateMaterials = true;
    public bool changeColorCutoff = true;
    public bool changeColorAlpha = true;
    public bool changeRendererActive = true;
	public bool useMeshNameOrMaterialNameForName = true;

    public override string titleText {
        get {
            return "Show/Hide, FadeIn/Out of Renderer using alpha channel of diffuse color";
        }
    }

    public override string[][] helpText {
        get {
            return new string[][] {
                new string[] {"Show", null, $"BTC.Show(\"{roomId}\", \"{gameObject.name}\")"},
                new string[] {"Hide", null, $"BTC.Hide(\"{roomId}\", \"{gameObject.name}\")"},
                new string[] {"FadeIn", null, $"BTC.FadeIn(\"{roomId}\", \"{gameObject.name}\")"},
                new string[] {"FadeOut", null, $"BTC.FadeOut(\"{roomId}\", \"{gameObject.name}\")"},
            };
        }
    }

    public override void Start () {
        if (instantiateMaterials) { 
            if ((rendererComponents.Length == 0) || (rendererComponents[0] == null)) {
                return;
            }
            foreach (Renderer renderer in rendererComponents) {
                foreach (Material mat in renderer.materials) {
                    // make color an instance
                    if (mat.HasProperty("_Color")) {
                        // only when playing, because of leaking materials
                        if (Application.isPlaying) { 
                            mat.SetColor("_Color", mat.color);
                        }
                    }
                    else {
                        Debug.LogWarning(gameObject.name + " has no color");
                    }
                }
            }
        }
    }

    #region both values setting
    public override void SetAlpha(float alpha) {
        if (changeColorCutoff) {
            SetMaterialCutoff(alpha);
        }
        if (changeColorAlpha) { 
            SetMaterialAlpha(alpha);
        }
        if (changeRendererActive) {
            SetRendererActive(alpha);
            fakeAlpha = alpha;
        }
    }

    public override float GetAlpha() {
        if (changeColorCutoff) {
            return GetMaterialCutoff();
        }
        if (changeColorAlpha) {
            return GetMaterialAlpha();
        }
        return fakeAlpha;
    }
    #endregion

    #region both values setting
    private Color _prevColor;
    private void SetMaterialAlpha(float alpha) {
        if ((rendererComponents.Length != 0) && (rendererComponents[0] != null)) {
            foreach (Renderer renderer in rendererComponents) {
                foreach (Material mat in renderer.materials) { 
                    if (mat.HasProperty("_Color")) {
                        Color prevColor = mat.color;
                        Color newColor = prevColor;
                        newColor.a = 1 - alpha;
                        if (prevColor != newColor) {
                            mat.color = newColor;
                        }
                    }
                }
            }
        }
    }

    private float GetMaterialAlpha() {
        if ((rendererComponents.Length != 0) && (rendererComponents[0] != null)) {
            return 1 - rendererComponents[0].sharedMaterial.color.a;
        }
        return 0;
    }

    private bool hasMaterialAlpha {
        get {
            if (rendererComponents.Length > 0) {
                return rendererComponents[0].sharedMaterial.HasProperty("_Color");
            }
            return false;
        }
    }
    #endregion

    #region cutoff 
    private float _prevCutoff;
    private void SetMaterialCutoff(float cutOffValue) {
        if ((rendererComponents.Length == 0) || (rendererComponents[0] == null)) {
            return;
        }
        if (cutOffValue != _prevCutOff) {
            foreach (Renderer renderer in rendererComponents) {
                foreach (Material mat in renderer.materials) {
                    if (mat.HasProperty("_Cutoff")) {
                        mat.SetFloat("_Cutoff", cutOffValue);
                        _prevCutoff = cutOffValue;
                    }
                }
            }
        }
    }

    private float GetMaterialCutoff() {
        if ((rendererComponents.Length == 0) || (rendererComponents[0] == null)) {
            return 0;
        }
        if (hasMaterialCutoff) {
            _prevCutOff = rendererComponents[0].sharedMaterial.GetFloat("_Cutoff");
        }
        return _prevCutOff;
    }

    private bool hasMaterialCutoff {
        get {
            if (rendererComponents.Length > 0) {
                return rendererComponents[0].sharedMaterial.HasProperty("_Cutoff");
            }
            return false;
        }
    }
    #endregion

    #region renderer active inactive
    float fakeAlpha = 0;
    private void SetRendererActive (float alpha) {
        foreach (Renderer renderer in rendererComponents) {
            renderer.enabled = (alpha <= 0);
        }
    }
    #endregion
}