import { Application } from 'express';
import fs from 'fs';
import path from 'path';
import bodyParser from 'body-parser';
import { OrisonServer } from '.';

function getEndpoints(root: string, folder: string, server: Application) {
    if (!fs.existsSync(folder)) {
        return;
    }
    const items = fs.readdirSync(folder);
    items.sort((a, b) => {
        if (a.startsWith('by-')) {
            return 1;
        }
        if (b.startsWith('by-')) {
            return -1;
        }
        return a.localeCompare(b);
    });
    for (const item of items) {
        const abs = path.resolve(path.join(folder, item));
        if (fs.lstatSync(abs).isDirectory()) {
            getEndpoints(root, abs, server);
        } else {
            if (item.endsWith('.js')) {
                let originalEndpoint = '/' + abs.substring(root.length + 1).replace(/\\/g, '/');
                let endpoint = originalEndpoint.substring(0, originalEndpoint.length - 3);
                if (endpoint.endsWith('index')) {
                    endpoint = endpoint.substring(0, endpoint.length - 6);
                }
                endpoint = endpoint.replace(/by-/g, ':');

                const file = require(abs);
                if (typeof file.post === 'function') {
                    console.log('Initializing API endpoint: POST ' + endpoint);
                    server.post(endpoint, file.post);
                }
                if (typeof file.get === 'function') {
                    console.log('Initializing API endpoint: GET ' + endpoint);
                    server.get(endpoint, file.get);
                }
                if (typeof file.del === 'function') {
                    console.log('Initializing API endpoint: DELETE ' + endpoint);
                    server.delete(endpoint, file.del);
                }
            }
        }
    }
}

export default {
    initialize(orison: OrisonServer) {
        const server = orison.getRequestListener();
        server.use('/api/*', bodyParser.json());
        getEndpoints(path.resolve('.orison'), '.orison/api', server);
        server.all('/api/*', (req, res) => {
            res.sendStatus(404);
        });
    }
}