import {Injectable}                 from '@angular/core';
import {Http, Response}             from '@angular/http';
import {Headers, RequestOptions}    from '@angular/http';
import {Observable}                 from 'rxjs/Rx';

import {CommunityInfo}              from '../community/communityInfo';

@Injectable()
export class CommunitiesService {

    constructor(private http:Http) {
    }

    getCommunities(url: string) {
        return this.http.get(url).map(res => <any> res.json()).map(res => this.parseCommunities(res));
    }

    parseCommunities(data: any): CommunityInfo[] {
        let communities: CommunityInfo[] = [];

        let length = Array.isArray(data) ? data.length :1;

        for (let i=0; i<length; i++) {
            let resData = Array.isArray(data) ? data[i] : data;

            var result: CommunityInfo = new CommunityInfo();

            if(Array.isArray(resData)) {
                result['title'] = resData[0].name;
                result['shortTitle'] = resData[0].shortName;
                result['communityId'] = resData[0].id;
                result['queryId'] = resData[0].queryId;
                result['logoUrl'] = resData[0].logoUrl;
                result['description'] = resData[0].description;
                result['date'] = resData[0].creationDate;

                if (resData[0].type != null) {
                      result['type'] = resData[0].type;
                }

                if(resData[0].managers != null) {
                    if(result['managers'] == undefined) {
                      result['managers'] = new Array<string>();
                    }

                    let managers = resData[0].managers;
                    let length = Array.isArray(managers) ? managers.length : 1;

                    for(let i=0; i<length; i++) {
                      let manager = Array.isArray(managers) ? managers[i] : managers;
                      result.managers[i] = manager;
                    }
                }

                if(resData[0].subjects != null) {
                    if(result['subjects'] == undefined) {
                      result['subjects'] = new Array<string>();
                    }

                    let subjects = resData[0].subjects;
                    let length = Array.isArray(subjects) ? subjects.length : 1;

                    for(let i=0; i<length; i++) {
                      let subject = Array.isArray(subjects) ? subjects[i] : subjects;
                      result.subjects[i] = subject;
                    }
                }

            } else {
                result['title'] = resData.name;
                result['shortTitle'] = resData.shortName;
                result['communityId'] = resData.id;
                result['queryId'] = resData.queryId;
                result['logoUrl'] = resData.logoUrl;
                result['description'] = resData.description;
                result['date'] = resData.creationDate;

                if (resData.type != null) {
                      result['type'] = resData.type;
                }

                if(resData.managers != null) {
                    if(result['managers'] == undefined) {
                      result['managers'] = new Array<string>();
                    }

                    let managers = resData.managers;
                    let length = Array.isArray(managers) ? managers.length : 1;

                    for(let i=0; i<length; i++) {
                      let manager = Array.isArray(managers) ? managers[i] : managers;
                      result.managers[i] = manager;
                    }
                }

                if(resData.subjects != null) {
                    if(result['subjects'] == undefined) {
                      result['subjects'] = new Array<string>();
                    }

                    let subjects = resData.subjects;
                    let length = Array.isArray(subjects) ? subjects.length : 1;

                    for(let i=0; i<length; i++) {
                      let subject = Array.isArray(subjects) ? subjects[i] : subjects;
                      result.subjects[i] = subject;
                    }
                }
            }
            communities.push(result);
        }

        return communities;
    }
}