/*
 * 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';

import { HttpClient } from '@angular/common/http';

import { from, Observable } from 'rxjs';
import { map } from 'rxjs/operators';
import { UnitDescription } from '../model/UnitDescription';
import { AdapterDescription, FormatDescription, GuessSchema, Message, SpDataStream, PlatformServicesCommons } from '@streampipes/platform-services';
import { AuthService } from '../../services/auth.service';

@Injectable()
export class RestService {

  constructor(
      private http: HttpClient,
      private platformServicesCommons: PlatformServicesCommons,
      private authService: AuthService) {
  }

  get connectPath() {
    return this.platformServicesCommons.apiBasePath + '/connect';
  }

  addAdapter(adapter: AdapterDescription): Observable<Message> {
    return this.addAdapterDescription(adapter, '/master/adapters');
  }

  addAdapterDescription(adapter: AdapterDescription, url: string): Observable<Message> {
    adapter.userName = this.authService.getCurrentUser().username;
    const promise = new Promise<Message>((resolve, reject) => {
      this.http
        .post(
          this.connectPath + url,
          adapter
        )
        .pipe(map(response => {
          const statusMessage = response as Message;
          resolve(statusMessage);
        }))
        .subscribe();
    });
    return from(promise);
  }

  getGuessSchema(adapter: AdapterDescription): Observable<GuessSchema> {
    return this.http
      .post(`${this.connectPath}/master/guess/schema`, adapter)
      .pipe(map(response => {
        return GuessSchema.fromData(response as GuessSchema);
      }));

  }

  getSourceDetails(sourceElementId): Observable<SpDataStream> {
    return this.http
      .get(`${this.platformServicesCommons.apiBasePath}/streams/${encodeURIComponent(sourceElementId)}`).pipe(map(response => {
        return SpDataStream.fromData(response as SpDataStream);
      }));
  }

  getRuntimeInfo(sourceDescription): Observable<any> {
    return this.http.post(`${this.platformServicesCommons.apiBasePath}/pipeline-element/runtime`, sourceDescription, {
      headers: { ignoreLoadingBar: '' }
    });
  }

  getFormats(): Observable<FormatDescription[]> {
    return this.http
      .get(`${this.connectPath}/master/description/formats`)
      .pipe(map(response => {
        return (response as any[]).map(f => FormatDescription.fromData(f));
      }));
  }

  getFittingUnits(unitDescription: UnitDescription): Observable<UnitDescription[]> {
    return this.http
      .post<UnitDescription[]>(`${this.connectPath}/master/unit`, unitDescription)
      .pipe(map(response => {
        const descriptions = response as UnitDescription[];
        return descriptions.filter(entry => entry.resource !== unitDescription.resource);
      }));
  }


}
