import 'package:evy/evy.dart';

void main() {
  var app = Evy();

  /// This middleware will match all routes.
  app.use(handler: logRequest);

  /// This middleware will be called only for '/greet/:name' routes.
  app.use(path: '/greet/:name', handler: checkName);

  /// This middleware will be called only for '/greet/:name' routes.
  /// It will be executed after checkName middleware.
  app.use(path: '/greet/:name', handler: changeName);

  /// Or just pass the middleware callbacks as a list.
  ///  app.use(path: '/greet/:name', callback: [checkName, changeName]);

  ///Routes can have a callback for process the request.
  app.get(path: '/greet/:name', handler: sayHello);

  ///Path can be a RegExp, this route will match /evy, /evyhi, /whateverevy... .
  app.get(path: RegExp('/.*evy'), handler: sayHello);

  ///Path can be a List of Strings, this will match /users, /user and /client.
  app.get(path: ['/users', '/user', '/client'], handler: sayHello);

  app.listen(
      port: 3000,
      callback: (error) {
        if (error != null) {
          print(error);
        } else {
          print('Server listening on port 3000');
        }
      });
}

void changeName(Request req, Response res, next) {
  if (req.params['name'] == 'Alberto') {
    req.params['name'] = 'Carlos';
  }
  next();
}

void checkName(Request req, Response res, next) {
  if (req.params['name'] != 'Alberto') {
    res.send('Only Alberto is allowed to use this action');
  } else {
    next();
  }
}

void logRequest(Request req, Response res, next) {
  /// Do your logging stuff and then call next()
  print('${req.ip} - - [${DateTime.now()}] "${req.method} ${req.originalUrl}"');
  next();
}

void sayHello(Request req, Response res, next) {
  if (req.params['name'] != null) {
    res.send('Hello ${req.params['name']}');
  } else {
    res.send('Hello');
  }
}