/**
 * Required External Modules and Interfaces
 */

import express, {Request, Response} from 'express';
import * as ProductService from './products.service';
import {Product} from './product.interface';
import {Products} from './products.interface';


/**
 * Router Definition
 */

export const productsRouter = express.Router();


/**
 * Controller Definitions
 */

// GET products/
productsRouter.get('/', async (req: Request, res: Response) => {
    try {
        const products: Products = await ProductService.findAll();

        res.status(200).send(products);
    } catch (e) {
        console.log('Error handling a request: ' + e.message);
        res.status(500).send(JSON.stringify({'message': 'Internal Server Error. Try again later.'}));
    }
});

// GET products/:id
productsRouter.get('/:id', async (req: Request, res: Response) => {
    const id: number = parseInt(req.params.id, 10);

    if (!id) {
        res.status(400).send('Missing parameters.');
        return;
    }

    try {
        const product: Product = await ProductService.find(id);

        res.status(200).send(product);
    } catch (e) {
        console.log('Error handling a request: ' + e.message);
        res.status(500).send(JSON.stringify({'message': 'Internal Server Error. Try again later.'}));
    }
});

// GET products/search/:term
productsRouter.get('/search/:term', async (req: Request, res: Response) => {
    const term: string = req.params.term;

    if (!term) {
        res.status(400).send('Missing parameters.');
        return;
    }

    try {
        const products: Products = await ProductService.findBySearchTerm(term);

        res.status(200).send(products);
    } catch (e) {
        console.log('Error handling a request: ' + e.message);
        res.status(500).send(JSON.stringify({'message': 'Internal Server Error. Try again later.'}));
    }
});

// GET products/list/[1,2,3]
productsRouter.get('/list/:ids', async (req: Request, res: Response) => {
    const ids: [number] = JSON.parse(req.params.ids);

    if (!ids) {
        res.status(400).send('Missing parameters.');
        return;
    }

    try {
        const products: Products = await ProductService.findList(ids);

        res.status(200).send(products);
    } catch (e) {
        console.log('Error handling a request: ' + e.message);
        res.status(500).send(JSON.stringify({'message': 'Internal Server Error. Try again later.'}));
    }
});

// GET products/vendor/:id
productsRouter.get('/vendor/:id', async (req: Request, res: Response) => {
    const id: number = parseInt(req.params.id, 10);

    if (!id) {
        res.status(400).send('Missing parameters.');
        return;
    }

    try {
        const products: Products = await ProductService.findByVendor(id);

        res.status(200).send(products);
    } catch (e) {
        console.log('Error handling a request: ' + e.message);
        res.status(500).send(JSON.stringify({'message': 'Internal Server Error. Try again later.'}));
    }
});

// POST products/
productsRouter.post('/', async (req: Request, res: Response) => {
    const asin: string = req.body.asin;

    if (!asin) {
        res.status(400).send('Missing parameters.');
        return;
    }

    try {
        const result: boolean = await ProductService.addNewProduct(asin);

        if (result) {
            res.status(201).send({});
        } else {
            res.status(500).send(JSON.stringify({'message': 'Internal Server Error. Try again later.'}));
        }
    } catch (e) {
        console.log('Error handling a request: ' + e.message);
        res.status(500).send(JSON.stringify({'message': 'Internal Server Error. Try again later.'}));
    }
});