import * as express from "express";
import { checkSchema, validationResult } from "express-validator";
import {ImportJobsList, ImportJob} from "../interfaces"
import {PROCESSING_TIME_IMPORT_ANY} from "../config";
import {importJobSchema} from "./schema";


class ImportController {
    public path = '/import';
    public router = express.Router();

    private importJobs: ImportJob[] = [];

    constructor() {
        this.initializeRoutes();
    };

    public initializeRoutes() {
        this.router.get(this.path, this.getAllImportJobs);
        this.router.post(this.path, checkSchema(importJobSchema), this.addImportJob);
    };

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

        this.importJobs.forEach((importJob:ImportJob) => {
            if (importJob.state === "pending"){
                result.pending.push(importJob);
            }else if (importJob.state === "finished"){
                result.finished.push(importJob);
            }
        });

        response.send(result);
    };

    addImportJob = (request: express.Request, response: express.Response) => {

        const validationResultArray = validationResult(request).array();
        if (validationResultArray.length > 0){
            response.status(400).send(validationResultArray);
        }else{
            const receivedImportJob = request.body;
            const fullImportJob:ImportJob = {
                bookId: receivedImportJob.bookId,
                type: receivedImportJob.type,
                url: receivedImportJob.url,
                state: "pending",
                created_at: new Date(),
                updated_at: new Date()
            };
            this.importJobs.push(fullImportJob);

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

            response.send(fullImportJob);
        }
    };
}

export default ImportController;