import { _ECommonState } from "../Data/CommonDataType";
import BasicObject from "./BasicObject";
import BasicTreeBehaviorNode from "./BasicTreeBehaviorNode";
import BasicTreeControlNode from "./BasicTreeControlNode";

/**
 * 基础行为树前提节点 - 逻辑层
 */
export default abstract class BasicTreePreconditionNode extends BasicObject {

    /**优先级 */
    protected _priority: number;
    /**前提节点 */
    protected _precondition: BasicTreePreconditionNode;
    
    constructor (priority: number = 0, precondition?: BasicTreePreconditionNode) {
        super();

        this._priority = priority;

        if (precondition != null) {
            this._precondition = precondition;
            this._precondition.priority = this._priority;
            this.addComponentIntance(this._precondition);
        }
    }

    public set priority (priority: number) {
        this._priority = priority;
    }

    public get priority (): number {
        return this._priority;
    }

    /**设置前提节点 */
    public set precondition (precondition: BasicTreePreconditionNode) {
        if (this._precondition != null) {
            this.removeComponentIntance(this._precondition, true);
        }

        this._precondition = precondition;
        this.addComponentIntance(this._precondition);
    }

    /**获得前提节点 */
    public get precondition (): BasicTreePreconditionNode {
        return this._precondition;
    }
    
    /**获得前提结果 */
    private getPreconditionResule (behavior: any, ...args: any): _ECommonState {
        return (this._precondition == null)? _ECommonState.Success:this._precondition.enter(behavior, ...args);
    }

    /**进入前提 */
    public enter (behavior: any, ...args: any): _ECommonState {
        let parent = (this.parent.parent as BasicTreeControlNode);
        let compatibilityChild: Array<string> = [];
        if (parent.behaviorTreeConfig != null) {
            compatibilityChild = parent.behaviorTreeConfig.compatibilityChild[(this.parent as BasicTreeBehaviorNode).behaviorType];
        }
        
        let control: BasicTreeBehaviorNode = parent.getChild(behavior);
        if (control != null) {
            // 通过优先级判断
            if (this.priority <= control.precondition.priority || (compatibilityChild != null && compatibilityChild.includes(behavior) == true)) {
                if (this.getPreconditionResule(behavior, ...args) == _ECommonState.Success && this._enter(behavior, ...args) == _ECommonState.Success) {
                    return _ECommonState.Success;
                }
            }
        }
        else {
            return _ECommonState.Success;
        }
        return _ECommonState.Fail;
    }

    /**进入前提 */
    protected abstract _enter (behavior: any, ...args: any): _ECommonState;
}