const models = require('../models');
import * as api from '../../client/src/api';
import { EndpointError, EndpointHandler, catchUnhandledErrors } from './types';
const { Op } = require("sequelize");

export const CreateArtistEndpointHandler: EndpointHandler = async (req: any, res: any) => {
    if (!api.checkCreateArtistRequest(req)) {
        const e: EndpointError = {
            internalMessage: 'Invalid CreateArtist request: ' + JSON.stringify(req.body),
            httpStatus: 400
        };
        throw e;
    }
    const reqObject: api.CreateArtistRequest = req.body;

    console.log("Create artist:", reqObject)

    try {

        // Start retrieving the tag instances to link the artist to.
        const tags = reqObject.tagIds && await models.Tag.findAll({
            where: {
                id: {
                    [Op.in]: reqObject.tagIds
                }
            }
        });

        console.log("Found artist tags:", tags)

        if (reqObject.tagIds && tags.length !== reqObject.tagIds.length) {
            const e: EndpointError = {
                internalMessage: 'Not all tags exist for CreateArtist request: ' + JSON.stringify(req.body),
                httpStatus: 400
            };
            throw e;
        }

        var artist = models.Artist.build({
            name: reqObject.name,
            storeLinks: reqObject.storeLinks || [],
        });
        tags && artist.addTags(tags);
        await artist.save();
        const responseObject: api.CreateSongResponse = {
            id: artist.id
        };
        await res.status(200).send(responseObject);
    } catch (e) {
        catchUnhandledErrors(e);
    }
}