import * as fs from 'fs';
import * as http from 'http';
import * as log from 'kmake/log';
import * as path from 'path';

export async function run(options: any, loglog: any): Promise<void> {
	log.set(loglog);

	log.info('Running server on ' + options.port + '...');
  
	const server = http.createServer((request, response) => {
		let baseDir = 'build/release';
		if (options.debug) {
			baseDir = 'build/debug';
		}

		let filePath = baseDir + request.url;
		if (request.url === '/') {
			filePath = baseDir + '/index.html';
		}

		const extname = path.extname(filePath);
		let contentType = 'text/html';
		switch (extname) {
			case '.js':
				contentType = 'text/javascript';
				break;
			case '.css':
				contentType = 'text/css';
				break;
			case '.json':
				contentType = 'application/json';
				break;
			case '.png':
				contentType = 'image/png';
				break;      
			case '.jpg':
				contentType = 'image/jpg';
				break;
			case '.wav':
				contentType = 'audio/wav';
				break;
			case '.wasm':
				contentType = 'application/wasm';
				break;
		}

		log.info('Reading file ' + filePath + '.');
		fs.readFile(filePath, (error, content) => {
			response.setHeader('Cross-Origin-Opener-Policy', 'same-origin');
			response.setHeader('Cross-Origin-Embedder-Policy', 'require-corp');

			if (error) {
				if (error.code == 'ENOENT'){
					log.info('File ' + filePath + ' not found.');
					fs.readFile('./404.html', (error, content) => {
						response.writeHead(200, { 'Content-Type': contentType });
						response.end(content, 'utf-8');
					});
				}
				else {
					response.writeHead(500);
					response.end('Error: ' + error.code + ' ..\n');
					response.end(); 
				}
			}
			else {
				response.writeHead(200, { 'Content-Type': contentType });
				response.end(content, 'utf-8');
			}
		});
	});
		
	server.on('error', (e) => {
		if (e.name === 'EADDRINUSE') {
			log.error('Error: Port ' + options.port + ' is already in use.');
			log.error('Please close the competing program (maybe another instance of kmake?)');
			log.error('or switch to a different port using the --port argument.');
		}
	});
	
	server.listen(options.port);
}