import { Injectable } from '@angular/core';
import { Http, Response } from '@angular/http';
import 'rxjs/add/operator/map';

@Injectable()
export class ResultService {

    private getResultUrl = '/get-subjects';
    private getChartUrl = '/analyze-subject';
    private getTextAnswerUrl = '/get-text-answers';
    private evaluationId: string;
    private subjectId: string;
    resultList = [];
    textAnswerList = [];
    http: Http;

    constructor(http: Http) {
        this.http = http;
    }

    public getResultList(){
        return this.resultList;
    }

    getTextAnswerList(){
        return this.textAnswerList;
    }


    updateEvalId(evaluationID){
        this.evaluationId = evaluationID;
    }

    getEvalId(){
        return this.evaluationId;
    }

    updateSubjId(subjectId){
        this.subjectId = subjectId;
    }

    getSubjId(){
        return this.subjectId;
    }

    getResult(data, callback, errHandler){
        this.http.get(this.getResultUrl, data)
        .map( (response : Response) =>{
            return response;
        } )
        .subscribe(
            (data) => {

                //this.resultList = data.json().obj;
                let result = data.json().obj;
                console.log("Not Sorted: ", result);
                this.resultList = result.sort((n1,n2) => {
                    if ((n1.name + " " + n1.class) > (n2.name + " " + n2.name)) {
                        return 1;
                    }
                
                    if ((n1.name + " " + n1.class) < (n2.name + " " + n2.name)) {
                        return -1;
                    }
                
                    return 0;
                })
                console.log("Sorted: ", this.resultList);
                callback();
            },
            (data) =>{
                errHandler();
            }
        );
    }

    getChartData(callback){
        const data = {
            evaluationId: this.evaluationId,
            subjectId: this.subjectId
        };
        this.http.post(this.getChartUrl, data)
        .map( (response : Response) =>{
            return response;
        } )
        .subscribe(
            (data) => {
                callback(data);
            },
            (data) =>{
                callback();
            }
        );
    }

    getTextAnswers(resultName, callback, errHandler){
        const data = {
            className: resultName,
            evaluationId: this.evaluationId
        }
        console.log("Data: ",data);
        this.http.post(this.getTextAnswerUrl, data)
        .map( (response : Response) =>{
            return response;
        } )
        .subscribe(
            (data) => {
                this.textAnswerList = data.json().obj;
                callback();
            },
            (data) =>{
                errHandler();
            }
        );
    }





}