import { axios, Tools } from 'platform-core';

class ParameterMapping {
  /**
   * 显示顺序映射
   */
  static #Boost = {
    //指标类型
    INTERFACE: 100, //接口
    INDICATOR: 100 - 1, //指标

    // 参数类型
    CONSTANT: 100, //常量
    IN: 100 - 1, //输入
    IN_OPTION: 100 - 1, //输入(选项)
    IN_SUB_OUT: 100 - 1, //输入(子模型输出)
    INTERMEDIATE: 100 - 2, //中间值
    OUT: 100 - 2, //输出

    // 元数据类型
    ENUM: 0, //枚举
    UD_JAVA_CLASS: 200 - 1, //自定义Java类
  };

  /**
   * 获取变量替换符前缀
   * @param type 类型
   * @returns 变量替换符前缀
   */
  public static getPlaceholderPrefix(type: string) {
    if (type === 'ENUM') {
      return '#';
    } else {
      return '$';
    }
  }

  /**
   * 获取自动完成项的优先级, 数值越大越优先
   * @param type 类型
   * @returns 自动完成项的优先级
   */
  public static getBoost(type: string) {
    return ParameterMapping.#Boost[type];
  }

  /**
   * 获取自动完成项的类型
   * @param type 类型
   * @returns 自动完成项的类型
   */
  public static getAutoCompletionType(type: string) {
    if (type === 'ENUM') {
      return 'enum';
    } else if (type === 'CONSTANT') {
      return 'constant';
    } else if (type === 'INDICATOR' || type === 'INTERMEDIATE' || type === 'OUT') {
      return 'variable';
    } else {
      return 'interface';
    }
  }
}

class AutoCompletionManager {
  parameters: any;
  valueTypes: any;

  constructor() {
    this.parameters = {};
    this.valueTypes = {};
  }

  public setParameters(parameters: any) {
    this.parameters = parameters;
  }
  public setValueTypes(valueTypes: any) {
    this.valueTypes = valueTypes;
  }

  public getOptions(path: string): any {
    // 如果没有路径, 返回参数列表
    if (!path) {
      return this.getParameterOptions();
    }
    // 以 . 结束表示对象属性
    if (path.endsWith('.')) {
      path = path.substring(0, path.length - 1);
    }
    const names = path.split('.');
    if (!names) {
      return this.getParameterOptions();
    }
    //查找参数
    const parameter = this.findParmeterByName(names[0]);
    if (!parameter) {
      return null;
    }
    let valueType = this.findValueType(parameter.valueType, parameter.valueTypeVersion);
    if (!valueType || !valueType.properties || valueType.properties.length <= 0) {
      return null;
    }
    let index = 1;
    while (index < names.length) {
      valueType = this.findValueTypeByPropertyName(valueType.code, valueType.version, names[index++]);
    }
    const options: any[] = [];
    for (const property of valueType.properties) {
      const option = this.getOptionItem(property);
      if (option) {
        options.push(option);
      }
    }
    return options;
  }

  public findParmeterByCode(parameterCode: string) {
    return this.parameters[parameterCode];
  }

  public findParmeterByName(parameterName: string) {
    const values = Object.values(this.parameters);
    for (const value of values) {
      if (value.name === parameterName) {
        return value;
      }
    }
    return null;
  }

  public findValueType(valueType: string, valueTypeVersion: number): any {
    if (Tools.isNill(valueType)) {
      return null;
    }
    const key = valueType + (Tools.isNill(valueTypeVersion) ? '' : ':' + valueTypeVersion);
    return this.valueTypes[key];
  }

  public findValueTypeByPropertyName(valueTypeString: string, valueTypeVersion: number, propertyName: string) {
    const valueType = this.findValueType(valueTypeString, valueTypeVersion);
    if (!valueType || !valueType.properties || valueType.properties.length <= 0) {
      return null;
    }
    for (const property of valueType.properties) {
      if (property.name === propertyName) {
        return this.findValueType(property.valueType, property.valueTypeVersion);
      }
    }
    return null;
  }

  public findValueTypeByPropertyCode(valueTypeString: string, valueTypeVersion: number, propertyCode: string) {
    const valueType = this.findValueType(valueTypeString, valueTypeVersion);
    if (!valueType || !valueType.properties || valueType.properties.length <= 0) {
      return null;
    }
    for (const property of valueType.properties) {
      if (property.code === propertyCode) {
        return this.findValueType(property.valueType, property.valueTypeVersion);
      }
    }
    return null;
  }

  public getParameterOptions(): any {
    const cache = {};
    const options: any[] = [];
    Object.values(this.parameters).forEach((parameter: any) => {
      const option = this.getOptionItem(parameter);
      if (option) {
        if (!cache[option.label]) {
          cache[option.label] = option;
          options.push(option);
        }
      }
    });
    for (const option of options) {
      option.boost = ParameterMapping.getBoost(option.category);
    }
    return options;
  }

  public getOptionItem(parameter: any) {
    const valueType = this.findValueType(parameter.valueType, parameter.valueTypeVersion);
    if (!Tools.isNill(valueType)) {
      const version = valueType.version ? valueType.name + '(V' + valueType.version + ')' : valueType.name;
      const info = parameter.valueTypeIsList ? 'List<' + version + '>' : version;
      return {
        category: parameter.type,
        type: ParameterMapping.getAutoCompletionType(parameter.type),
        label: parameter.name,
        apply: ParameterMapping.getPlaceholderPrefix(parameter.type) + '{' + parameter.name + '}' + (parameter.valueTypeIsList ? '[0]' : ''),
        info: info,
      };
    }
    return null;
  }

  public autoCompletionParameters(to: any, matchedText?: any): any {
    return {
      from: to,
      options: this.getParameterOptions(),
      validFor: /(.*)?/,
    };
  }

  public autoCompletionProperties(to: any, matchedText?: any): any {
    const matchedTextReverse = Tools.reverseString(matchedText);
    const regReverse = /(\.(\](.+?)\[)?\}(.+?)\{[$#])+/g; //匹配 '.]n[}xxx{$#' 模式
    //                   -- -- --- --  -- --- ----
    //                   .  ]  n   [   }  xxx {$#
    const matcheds: any = matchedTextReverse.match(regReverse);
    if (Tools.isUndefinedOrNull(matcheds) || matcheds.length <= 0) {
      return null;
    }
    const matched = Tools.reverseString(matcheds[0]);
    const parameterName = matched.replace(/[#$]\{(.+?)\}(\[(.+?)\])?/g, '$1');
    if (Tools.isUndefinedOrNull(parameterName)) {
      return null;
    }
    const options = this.getOptions(parameterName);
    if (Tools.isUndefinedOrNull(options)) {
      return null;
    }
    return {
      from: to,
      options: options,
      validFor: /^(.*)?$/,
    };
  }

  public doAutoCompletion(context: any): any {
    const beforeMatched = context.matchBefore(/(.+?)/g);
    if (Tools.isUndefinedOrNull(beforeMatched)) {
      return null;
    }
    const beforeText = beforeMatched.text || '';
    if (beforeText.endsWith('.')) {
      //匹配属性
      return this.autoCompletionProperties(beforeMatched.to, beforeText);
    } else if (beforeText.endsWith(' ')) {
      //匹配参数
      return this.autoCompletionParameters(beforeMatched.to);
    } else {
      return null;
    }
  }

  public load(url: string) {
    axios.get(url).then((response: any) => {
      this.setParameters(response.data?.parameters);
      this.setValueTypes(response.data?.valueTypes);
    });
  }

  public autoCompletion(): any {
    return (context: any) => {
      return this.doAutoCompletion(context);
    };
  }
}

export { AutoCompletionManager };