var express = require('express')
  , routes = require('./routes')
  , http = require('http');

var app = express();

app.configure(function(){
  app.set('port', process.env.PORT || 3000);
  app.set('views', __dirname + '/views');
  app.set('view engine', 'jade');
  app.use(express.favicon());
  app.use(express.logger('dev'));
  app.use(express.bodyParser());
  app.use(express.methodOverride());
  app.use(urlgenerator);
  app.use(app.router);
  app.use(express.static(__dirname + '/public', {maxAge: 60 * 60 * 1000}));
});

app.configure('development', function(){
  app.use(express.errorHandler());
});

function urlgenerator(req, res, next) {
  var host = req.headers.host;
  res.urlgenerator = {
    start: function() {
      return 'http://' + host + '/';
    },

    departments: function(offset) {
      return 'http://' + host + '/department/' + (offset ? '?offset=' + offset : '');
    },
    department: function(dept_no) {
      return 'http://' + host + '/department/' + dept_no;
    },
    employees_in_department: function(dept_no, offset) {
      return 'http://' + host + '/department/' + dept_no + '/employees' + (offset ? '?offset=' + offset : '');
    },

    employees: function(offset) {
      return 'http://' + host + '/employee/' + (offset ? '?offset=' + offset : '');
    },
    employee: function(emp_no) {
      return 'http://' + host + '/employee/' + emp_no;
    }
  };
  next();
}

app.get('/', routes.index);
app.get('/department', routes.departments);
app.get('/department/:dept_no', routes.department);
app.get('/department/:dept_no/employees', routes.employees_in_department);
app.get('/employee', routes.employees);
app.get('/employee/:emp_no', routes.employee);

http.createServer(app).listen(app.get('port'), function(){
  console.log("Express server listening on port " + app.get('port'));
});