import { AbstractScene } from "./abstractScene";
import { Scene } from "./scene";
import { Mesh } from "./Meshes/mesh";
import { TransformNode } from './Meshes/transformNode';
import { Skeleton } from './Bones/skeleton';
import { AnimationGroup } from './Animations/animationGroup';
import { Animatable } from './Animations/animatable';
import { AbstractMesh } from './Meshes/abstractMesh';
import { MultiMaterial } from './Materials/multiMaterial';
import { Material } from './Materials/material';
import { Logger } from './Misc/logger';
import { EngineStore } from './Engines/engineStore';
import { Nullable } from './types';
import { Node } from './node';

/**
 * Set of assets to keep when moving a scene into an asset container.
 */
export class KeepAssets extends AbstractScene { }

/**
 * Class used to store the output of the AssetContainer.instantiateAllMeshesToScene function
 */
export class InstantiatedEntries {
    /**
     * List of new root nodes (eg. nodes with no parent)
     */
    public rootNodes: TransformNode[] = [];

    /**
     * List of new skeletons
     */
    public skeletons: Skeleton[] = [];

    /**
     * List of new animation groups
     */
    public animationGroups: AnimationGroup[] = [];
}

/**
 * Container with a set of assets that can be added or removed from a scene.
 */
export class AssetContainer extends AbstractScene {
    /**
     * The scene the AssetContainer belongs to.
     */
    public scene: Scene;

    /**
     * Instantiates an AssetContainer.
     * @param scene The scene the AssetContainer belongs to.
     */
    constructor(scene: Scene) {
        super();
        this.scene = scene;
        this["sounds"] = [];
        this["effectLayers"] = [];
        this["layers"] = [];
        this["lensFlareSystems"] = [];
        this["proceduralTextures"] = [];
        this["reflectionProbes"] = [];
    }

    /**
     * Instantiate or clone all meshes and add the new ones to the scene.
     * Skeletons and animation groups will all be cloned
     * @param nameFunction defines an optional function used to get new names for clones
     * @param cloneMaterials defines an optional boolean that defines if materials must be cloned as well (false by default)
     * @returns a list of rootNodes, skeletons and aniamtion groups that were duplicated
     */
    public instantiateModelsToScene(nameFunction?: (sourceName: string) => string, cloneMaterials = false): InstantiatedEntries {
        let convertionMap: {[key: number]: number} = {};
        let storeMap: {[key: number]: any} = {};
        let result = new InstantiatedEntries();
        let alreadySwappedSkeletons: Skeleton[] = [];
        let alreadySwappedMaterials: Material[] = [];

        let options = {
            doNotInstantiate: true
        };

        let onClone = (source: TransformNode, clone: TransformNode) => {
            convertionMap[source.uniqueId] = clone.uniqueId;
            storeMap[clone.uniqueId] = clone;

            if (nameFunction) {
                clone.name = nameFunction(source.name);
            }

            if (clone instanceof Mesh) {
                let clonedMesh = clone as Mesh;

                if (clonedMesh.morphTargetManager) {
                    let oldMorphTargetManager = (source as Mesh).morphTargetManager!;
                    clonedMesh.morphTargetManager = oldMorphTargetManager.clone();

                    for (var index = 0; index < oldMorphTargetManager.numTargets; index++) {
                        let oldTarget = oldMorphTargetManager.getTarget(index);
                        let newTarget = clonedMesh.morphTargetManager.getTarget(index);

                        convertionMap[oldTarget.uniqueId] = newTarget.uniqueId;
                        storeMap[newTarget.uniqueId] = newTarget;
                    }
                }
            }
        };

        this.transformNodes.forEach((o) => {
            if (!o.parent) {
                let newOne = o.instantiateHierarchy(null, options, (source, clone) => {
                    onClone(source, clone);
                });

                if (newOne) {
                    result.rootNodes.push(newOne);
                }
            }
        });

        this.meshes.forEach((o) => {
            if (!o.parent) {
                let newOne = o.instantiateHierarchy(null, options, (source, clone) => {
                    onClone(source, clone);

                    if ((clone as any).material) {
                        let mesh = clone as AbstractMesh;

                        if (mesh.material) {
                            if (cloneMaterials) {
                                let sourceMaterial = (source as AbstractMesh).material!;

                                if (alreadySwappedMaterials.indexOf(sourceMaterial) === -1) {
                                    let swap = sourceMaterial.clone(nameFunction ? nameFunction(sourceMaterial.name) : "Clone of " + sourceMaterial.name)!;
                                    alreadySwappedMaterials.push(sourceMaterial);
                                    convertionMap[sourceMaterial.uniqueId] = swap.uniqueId;
                                    storeMap[swap.uniqueId] = swap;

                                    if (sourceMaterial.getClassName() === "MultiMaterial") {
                                        let multi = sourceMaterial as MultiMaterial;

                                        for (var material of multi.subMaterials) {
                                            if (!material) {
                                                continue;
                                            }
                                            swap = material.clone(nameFunction ? nameFunction(material.name) : "Clone of " + material.name)!;
                                            alreadySwappedMaterials.push(material);
                                            convertionMap[material.uniqueId] = swap.uniqueId;
                                            storeMap[swap.uniqueId] = swap;
                                        }
                                    }
                                }

                                mesh.material = storeMap[convertionMap[sourceMaterial.uniqueId]];
                            } else {
                                if (mesh.material.getClassName() === "MultiMaterial") {
                                    if (this.scene.multiMaterials.indexOf(mesh.material as MultiMaterial) === -1) {
                                        this.scene.addMultiMaterial(mesh.material as MultiMaterial);
                                    }
                                } else {
                                    if (this.scene.materials.indexOf(mesh.material) === -1) {
                                        this.scene.addMaterial(mesh.material);
                                    }
                                }
                            }
                        }
                    }

                });

                if (newOne) {
                    result.rootNodes.push(newOne);
                }
            }
        });

        this.skeletons.forEach((s) => {
            let clone =  s.clone(nameFunction ? nameFunction(s.name) : "Clone of " + s.name);

            if (s.overrideMesh) {
                clone.overrideMesh = storeMap[convertionMap[s.overrideMesh.uniqueId]];
            }

            for (var m of this.meshes) {
                if (m.skeleton === s && !m.isAnInstance) {
                    let copy = storeMap[convertionMap[m.uniqueId]];
                    (copy as Mesh).skeleton = clone;

                    if (alreadySwappedSkeletons.indexOf(clone) !== -1) {
                        continue;
                    }

                    alreadySwappedSkeletons.push(clone);

                    // Check if bones are mesh linked
                    for (var bone of clone.bones) {
                        if (bone._linkedTransformNode) {
                            bone._linkedTransformNode = storeMap[convertionMap[bone._linkedTransformNode.uniqueId]];
                        }
                    }
                }
            }

            result.skeletons.push(clone);
        });

        this.animationGroups.forEach((o) => {
            let clone = o.clone(o.name, (oldTarget) => {
                let newTarget = storeMap[convertionMap[oldTarget.uniqueId]];

                return newTarget || oldTarget;
            });

            result.animationGroups.push(clone);
        });

        return result;
    }

    /**
     * Adds all the assets from the container to the scene.
     */
    public addAllToScene() {
        this.cameras.forEach((o) => {
            this.scene.addCamera(o);
        });
        this.lights.forEach((o) => {
            this.scene.addLight(o);
        });
        this.meshes.forEach((o) => {
            this.scene.addMesh(o);
        });
        this.skeletons.forEach((o) => {
            this.scene.addSkeleton(o);
        });
        this.animations.forEach((o) => {
            this.scene.addAnimation(o);
        });
        this.animationGroups.forEach((o) => {
            this.scene.addAnimationGroup(o);
        });
        this.multiMaterials.forEach((o) => {
            this.scene.addMultiMaterial(o);
        });
        this.materials.forEach((o) => {
            this.scene.addMaterial(o);
        });
        this.morphTargetManagers.forEach((o) => {
            this.scene.addMorphTargetManager(o);
        });
        this.geometries.forEach((o) => {
            this.scene.addGeometry(o);
        });
        this.transformNodes.forEach((o) => {
            this.scene.addTransformNode(o);
        });
        this.actionManagers.forEach((o) => {
            this.scene.addActionManager(o);
        });
        this.textures.forEach((o) => {
            this.scene.addTexture(o);
        });
        this.reflectionProbes.forEach((o) => {
            this.scene.addReflectionProbe(o);
        });

        if (this.environmentTexture) {
            this.scene.environmentTexture = this.environmentTexture;
        }

        for (let component of this.scene._serializableComponents) {
            component.addFromContainer(this);
        }
    }

    /**
     * Removes all the assets in the container from the scene
     */
    public removeAllFromScene() {
        this.cameras.forEach((o) => {
            this.scene.removeCamera(o);
        });
        this.lights.forEach((o) => {
            this.scene.removeLight(o);
        });
        this.meshes.forEach((o) => {
            this.scene.removeMesh(o);
        });
        this.skeletons.forEach((o) => {
            this.scene.removeSkeleton(o);
        });
        this.animations.forEach((o) => {
            this.scene.removeAnimation(o);
        });
        this.animationGroups.forEach((o) => {
            this.scene.removeAnimationGroup(o);
        });
        this.multiMaterials.forEach((o) => {
            this.scene.removeMultiMaterial(o);
        });
        this.materials.forEach((o) => {
            this.scene.removeMaterial(o);
        });
        this.morphTargetManagers.forEach((o) => {
            this.scene.removeMorphTargetManager(o);
        });
        this.geometries.forEach((o) => {
            this.scene.removeGeometry(o);
        });
        this.transformNodes.forEach((o) => {
            this.scene.removeTransformNode(o);
        });
        this.actionManagers.forEach((o) => {
            this.scene.removeActionManager(o);
        });
        this.textures.forEach((o) => {
            this.scene.removeTexture(o);
        });
        this.reflectionProbes.forEach((o) => {
            this.scene.removeReflectionProbe(o);
        });

        if (this.environmentTexture === this.scene.environmentTexture) {
            this.scene.environmentTexture = null;
        }

        for (let component of this.scene._serializableComponents) {
            component.removeFromContainer(this);
        }
    }

    /**
     * Disposes all the assets in the container
     */
    public dispose() {
        this.cameras.forEach((o) => {
            o.dispose();
        });
        this.cameras = [];

        this.lights.forEach((o) => {
            o.dispose();
        });
        this.lights = [];

        this.meshes.forEach((o) => {
            o.dispose();
        });
        this.meshes = [];

        this.skeletons.forEach((o) => {
            o.dispose();
        });
        this.skeletons = [];

        this.animationGroups.forEach((o) => {
            o.dispose();
        });
        this.animationGroups = [];

        this.multiMaterials.forEach((o) => {
            o.dispose();
        });
        this.multiMaterials = [];

        this.materials.forEach((o) => {
            o.dispose();
        });
        this.materials = [];

        this.geometries.forEach((o) => {
            o.dispose();
        });
        this.geometries = [];

        this.transformNodes.forEach((o) => {
            o.dispose();
        });
        this.transformNodes = [];

        this.actionManagers.forEach((o) => {
            o.dispose();
        });
        this.actionManagers = [];

        this.textures.forEach((o) => {
            o.dispose();
        });
        this.textures = [];

        this.reflectionProbes.forEach((o) => {
            o.dispose();
        });
        this.reflectionProbes = [];

        if (this.environmentTexture) {
            this.environmentTexture.dispose();
            this.environmentTexture = null;
        }

        for (let component of this.scene._serializableComponents) {
            component.removeFromContainer(this, true);
        }
    }

    private _moveAssets<T>(sourceAssets: T[], targetAssets: T[], keepAssets: T[]): void {
        if (!sourceAssets) {
            return;
        }

        for (let asset of sourceAssets) {
            let move = true;
            if (keepAssets) {
                for (let keepAsset of keepAssets) {
                    if (asset === keepAsset) {
                        move = false;
                        break;
                    }
                }
            }

            if (move) {
                targetAssets.push(asset);
            }
        }
    }

    /**
     * Removes all the assets contained in the scene and adds them to the container.
     * @param keepAssets Set of assets to keep in the scene. (default: empty)
     */
    public moveAllFromScene(keepAssets?: KeepAssets): void {

        if (keepAssets === undefined) {
            keepAssets = new KeepAssets();
        }

        for (let key in this) {
            if (this.hasOwnProperty(key)) {
                (<any>this)[key] = (<any>this)[key] || (key === "environmentTexture" ? null : []);
                this._moveAssets((<any>this.scene)[key], (<any>this)[key], (<any>keepAssets)[key]);
            }
        }

        this.removeAllFromScene();
    }

    /**
     * Adds all meshes in the asset container to a root mesh that can be used to position all the contained meshes. The root mesh is then added to the front of the meshes in the assetContainer.
     * @returns the root mesh
     */
    public createRootMesh() {
        var rootMesh = new Mesh("assetContainerRootMesh", this.scene);
        this.meshes.forEach((m) => {
            if (!m.parent) {
                rootMesh.addChild(m);
            }
        });
        this.meshes.unshift(rootMesh);
        return rootMesh;
    }

    /**
     * Merge animations from this asset container into a scene
     * @param scene is the instance of BABYLON.Scene to append to (default: last created scene)
     * @param animatables set of animatables to retarget to a node from the scene
     * @param targetConverter defines a function used to convert animation targets from the asset container to the scene (default: search node by name)
     */
    public mergeAnimationsTo(scene: Nullable<Scene> = EngineStore.LastCreatedScene, animatables: Animatable[], targetConverter: Nullable<(target: any) => Nullable<Node>> = null): void {
        if (!scene) {
            Logger.Error("No scene available to merge animations to");
            return;
        }

        let _targetConverter = targetConverter ? targetConverter : (target: any) => { return scene.getBoneByName(target.name) || scene.getNodeByName(target.name); };

        // Copy new node animations
        let nodesInAC = this.getNodes();
        nodesInAC.forEach((nodeInAC) => {
            let nodeInScene = _targetConverter(nodeInAC);
            if (nodeInScene !== null) {
                // Remove old animations with same target property as a new one
                for (let animationInAC of nodeInAC.animations) {
                    // Doing treatment on an array for safety measure
                    let animationsWithSameProperty = nodeInScene.animations.filter((animationInScene) => {
                        return animationInScene.targetProperty === animationInAC.targetProperty;
                    });
                    for (let animationWithSameProperty of animationsWithSameProperty) {
                        const index = nodeInScene.animations.indexOf(animationWithSameProperty, 0);
                        if (index > -1) {
                            nodeInScene.animations.splice(index, 1);
                        }
                    }
                }

                // Append new animations
                nodeInScene.animations = nodeInScene.animations.concat(nodeInAC.animations);
            }
        });

        // Copy new animation groups
        this.animationGroups.slice().forEach((animationGroupInAC) => {
            // Clone the animation group and all its animatables
            animationGroupInAC.clone(animationGroupInAC.name, _targetConverter);

            // Remove animatables related to the asset container
            animationGroupInAC.animatables.forEach((animatable) => {
                animatable.stop();
            });
        });

        // Retarget animatables
        animatables.forEach((animatable) => {
            let target = _targetConverter(animatable.target);

            if (target) {
                // Clone the animatable and retarget it
                scene.beginAnimation(target, animatable.fromFrame, animatable.toFrame, animatable.loopAnimation, animatable.speedRatio, animatable.onAnimationEnd ? animatable.onAnimationEnd : undefined, undefined, true, undefined, animatable.onAnimationLoop ? animatable.onAnimationLoop : undefined);

                // Stop animation for the target in the asset container
                scene.stopAnimation(animatable.target);
            }
        });
    }
}