import { AlgorithmEngine } from './AlgorithmEngine.js';
import { Operand } from './Operand.js';
import { JsonMapper } from './LitJson/JsonMapper.js';

/**
 * AlgorithmEngine 扩展类
 * 增加自定义参数缓存功能
 */
export class AlgorithmEngineEx extends AlgorithmEngine {
 constructor(ignoreCase = false) {
 super();
 this.IgnoreCase = ignoreCase;
 this.UseTempDict = false;
 this._tempdict = {};
 }

 /**
 * 自定义参数 请重写此方法
 */
 GetParameter(parameter) {
 let key = this.IgnoreCase ? parameter.toLowerCase() : parameter;
 if (this._tempdict[key] !== undefined) {
 return this._tempdict[key];
 }
 let result = super.GetParameter ? super.GetParameter(parameter) : Operand.CreateNull();
 if (this.UseTempDict) {
 this._tempdict[key] = result;
 }
 return result;
 }


 /**
 * 清理参数
 */
 ClearParameters() {
 this._tempdict = {};
 }

 /**
 * 添加自定义参数
 */
 AddParameter(key, obj) {
 let paramKey = this.IgnoreCase ? key.toLowerCase() : key;
 if (obj instanceof Operand) {
 this._tempdict[paramKey] = obj;
 } else {
 this._tempdict[paramKey] = Operand.Create(obj);
 }
 }

 /**
 * 添加自定义参数
 */
 AddParameterFromJson(json) {
 if (json.startsWith('{') && json.endsWith('}')) {
 let jo = JsonMapper.toObject(json);
 if (jo.IsObject) {
 let obj = jo.ensureDictionary();
 for (let key in obj) {
 if (obj.hasOwnProperty(key)) {
 let v = obj[key];
 let paramKey = this.IgnoreCase ? key.toLowerCase() : key;
 if (v.IsString) {
 this._tempdict[paramKey] = Operand.Create(v.StringValue);
 } else if (v.IsBoolean) {
 this._tempdict[paramKey] = Operand.Create(v.BooleanValue);
 } else if (v.IsDouble) {
 this._tempdict[paramKey] = Operand.Create(v.NumberValue);
 } else if (v.IsObject) {
 this._tempdict[paramKey] = Operand.Create(v);
 } else if (v.IsArray) {
 this._tempdict[paramKey] = Operand.Create(v);
 } else if (v.IsNull) {
 this._tempdict[paramKey] = Operand.CreateNull();
 }
 }
 }
 return;
 }
 }
 throw new Error("Parameter is not json string.");
 }

}

// 浏览器支持
if (typeof window !== 'undefined') {
 window.AlgorithmEngineEx = AlgorithmEngineEx;
}