import Controller from "swaf/Controller";
import {NextFunction, Request, Response} from "express";
import * as https from "https";
import config from "config";
import {log} from "swaf/Logger";
import {NotFoundHttpError} from "swaf/HttpError";

export default class GiteaRepoLatestReleaseController extends Controller {
    public routes(): void {
        this.get('/:owner/:name/:file?', this.getFile, 'get-repo-release-file');
    }

    protected async getFile(req: Request, res: Response, next: NextFunction): Promise<void> {
        log.info('Serving ' + req.path + ' ...');
        const {owner, name, file} = req.params;
        if (!owner || !name) return next();

        https.get(`${config.get('gitea_instance_url')}/api/v1/repos/${owner}/${name}/releases`, {
            headers: {
                'Accept': 'application/json',
            },
        }, r => {
            let data = '';
            r.on('data', c => {
                data += c;
            });
            r.on('end', () => {
                try {
                    const releases = JSON.parse(data);

                    if (file) {
                        for (const release of releases) {
                            for (const asset of release.assets) {
                                if (asset.name === file) {
                                    log.debug('Redirect to', asset.browser_download_url);
                                    return res.redirect(302, asset.browser_download_url);
                                }
                            }
                        }
                        throw new NotFoundHttpError('Asset', req.url);
                    } else {
                        log.debug('List files');
                        return res.render('list-files', {
                            owner: owner,
                            name: name,
                            releases: releases,
                        });
                    }
                } catch (e) {
                    return next(e);
                }
            });
        }).on('error', err => {
            log.error(err);
        });
    }
}