/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

import {Injectable} from '@angular/core';

@Injectable()
export class DataTypesService {
  private dataTypes: Array<{label: string, url: string}> = [
    {
      label: 'String - A textual datatype, e.g., \'machine1\'',
      url: 'http://www.w3.org/2001/XMLSchema#string'},
    {
      label: 'Boolean - A true/false value',
      url: 'http://www.w3.org/2001/XMLSchema#boolean'},
    {
      label:  'Float - A number, e.g., \'1.25\'',
      url: 'http://www.w3.org/2001/XMLSchema#float'
    }, {
      label:  'Integer - A number, e.g., \'2\'',
      url: 'http://www.w3.org/2001/XMLSchema#integer'
    }
  ];

  constructor() {}

  getLabel(url: string): string {
    for (const dataType of this.dataTypes) {
      if (dataType.url === url) {
        return dataType.label;
      }
    }
    return 'Invalid data type';
  }

  getUrl(id: number): string {
    return this.dataTypes[id].url;
  }

  getDataTypes() {
    return this.dataTypes;
  }

  getNumberTypeUrl(): string {
    return String(this.dataTypes[2].url);
  }

  getStringTypeUrl(): string {
    return String(this.dataTypes[0].url);
  }

  getBooleanTypeUrl(): string {
    return String(this.dataTypes[1].url);
  }

  isNumeric(uri: string) {
    const numericDataTypes = ['http://www.w3.org/2001/XMLSchema#float', 'http://www.w3.org/2001/XMLSchema#integer'];
    return numericDataTypes.includes(uri);
  }

}
