import * as express from 'express';
import {ExportJob, ExportJobsList} from "../interfaces"
import {PROCESSING_TIME_EXPORT} from "../config";

class ExportController {
    public path = '/export';
    public router = express.Router();

    private exportJobs: ExportJob[] = [];

    constructor() {
        this.initializeRoutes();
    }

    public initializeRoutes() {
        this.router.get(this.path, this.getAllExportJobs);
        this.router.post(this.path, this.addExportJob);
    }

    getAllExportJobs = (request: express.Request, response: express.Response) => {
        const result: ExportJobsList = {
            pending: [],
            finished: []
        };

        this.exportJobs.forEach((exportJob:ExportJob) => {
            if (exportJob.state === "pending"){
                result.pending.push(exportJob);
            }else if (exportJob.state === "finished"){
                result.finished.push(exportJob);
            }
        });

        response.send(result);
    };

    addExportJob = (request: express.Request, response: express.Response) => {
        const receivedExportJob = request.body;
        const fullExportJob:ExportJob = {
            bookId: receivedExportJob.bookId,
            type: receivedExportJob.type,
            state: "pending",
            created_at: new Date(),
            updated_at: new Date()
        };
        this.exportJobs.push(fullExportJob);

        const jobIndexToUpdate:number = this.exportJobs.length-1;
        const timeout:number = PROCESSING_TIME_EXPORT[fullExportJob.type]*1000;
        setTimeout((jobIndex:number) => {
            this.exportJobs[jobIndex].state = "finished";
            this.exportJobs[jobIndex].updated_at = new Date();
        }, timeout, jobIndexToUpdate);

        response.send();
    }
}

export default ExportController;