const bodyParser = require('body-parser');
import * as api from '../client/src/api';

import { CreateSongEndpointHandler } from './endpoints/CreateSongEndpointHandler';
import { CreateArtistEndpointHandler } from './endpoints/CreateArtistEndpointHandler';
import { QuerySongsEndpointHandler } from './endpoints/QuerySongsEndpointHandler';
import { QueryArtistsEndpointHandler } from './endpoints/QueryArtistsEndpointHandler';
import { ArtistDetailsEndpointHandler } from './endpoints/ArtistDetailsEndpointHandler'
import { SongDetailsEndpointHandler } from './endpoints/SongDetailsEndpointHandler';
import { ModifyArtistEndpointHandler } from './endpoints/ModifyArtistEndpointHandler';
import { ModifySongEndpointHandler } from './endpoints/ModifySongEndpointHandler';
import * as endpointTypes from './endpoints/types';

const invokeHandler = (handler:endpointTypes.EndpointHandler) => {
    return async (req: any, res: any) => {
        console.log("Incoming", req.method, " @ ", req.url);
        await handler(req, res)
        .catch(endpointTypes.catchUnhandledErrors)
        .catch((_e:endpointTypes.EndpointError) => {
            let e:endpointTypes.EndpointError = _e;
            console.log("Error handling request: ", e.internalMessage);
            res.sendStatus(e.httpStatus);
        })
        console.log("Finished handling", req.method, "@", req.url);
    };
}

const SetupApp = (app: any) => {
    app.use(bodyParser.json());
    app.use(bodyParser.urlencoded({ extended: true }));

    // Set up REST API endpoints
    app.post(api.CreateSongEndpoint, invokeHandler(CreateSongEndpointHandler));
    app.post(api.QuerySongsEndpoint, invokeHandler(QuerySongsEndpointHandler));
    app.post(api.CreateArtistEndpoint, invokeHandler(CreateArtistEndpointHandler));
    app.post(api.QueryArtistsEndpoint, invokeHandler(QueryArtistsEndpointHandler));
    app.put(api.ModifyArtistEndpoint, invokeHandler(ModifyArtistEndpointHandler));
    app.put(api.ModifySongEndpoint, invokeHandler(ModifySongEndpointHandler));
    app.get(api.SongDetailsEndpoint, invokeHandler(SongDetailsEndpointHandler));
    app.get(api.ArtistDetailsEndpoint, invokeHandler(ArtistDetailsEndpointHandler));
}

export { SetupApp }