var express        = require('express');
var bodyParser     = require('body-parser');
var path           = require('path');
var debug          = require('debug')('ff:tcrud:setup');
var configRegistry = require('./config-registry');
var buildServerApi = require('./build-server-api');
var buildServerApiTEntity = require('./build-server-api-tentity');

var mod = (function () {
	
	var server = null;
	
	var expressCreate = function() {
		if (server === null) {
			server = express();
		} else {
			throw new Error('Can only create once.');
		}
	};
	
	var expressBuild = function(options) {
		if (!options) {
			options = {
				viewsDir: null
			};
		}
		
		var viewsDirs = [];
		viewsDirs.push(path.join(__dirname, 'www_views'));
		if (options.viewsDir) {
			viewsDirs.push(options.viewsDir);	
		}
		server.set('view engine', 'ejs');
		server.set('views', viewsDirs);
		debug('build.views: '+viewsDirs);
		
		server.use(bodyParser.json());
		server.use(bodyParser.urlencoded());
		debug('build.bodyParser');
		
		buildServerApi.build(server);
		buildServerApiTEntity.build(server);
		debug('build.serverApi');
	};
	
	var expressListen = function() {
		var tcrud = configRegistry.getRootTEntity();
		var serverPortIndex = tcrud.tmeta.tserver.thost.indexOf(':',6); // TODO: make robust
		var serverPort = tcrud.tmeta.tserver.thost.substring(serverPortIndex+1);
		debug('listen port: '+serverPort);
		server.listen(serverPort);
		return serverPort;
	}
	
	return function TCrudSetup() {

		this.pluginLoad = function(plugin) {
			configRegistry.assertPhaseInit();
			configRegistry.pluginLoad(plugin);
		};
		
		this.pluginEnable = function(pluginKey) {
			configRegistry.assertPhaseInit();
			configRegistry.pluginEnable(pluginKey);
		};
		
		this.pluginEnableAll = function() {
			configRegistry.assertPhaseInit();
			configRegistry.pluginEnable('.*');
		};
		
		this.pluginDisable = function(pluginKey) {
			configRegistry.assertPhaseInit();
			configRegistry.pluginEnable(pluginKey,false);
		};
		
		
		
		this.phaseConfig = function() {
			configRegistry.assertPhaseInit();
			configRegistry.phaseNext();
		};
		
		this.phaseServer = function() {
			configRegistry.assertPhaseConfig();
			configRegistry.phaseNext();
		};
		
		this.phaseServerUp = function() {
			configRegistry.assertPhaseServer();
			configRegistry.phaseNext();
			
			var ctx = {
				server: server
			}
			configRegistry.pluginCall('configPostBoot',ctx);
		};
		
		
		this.expressSimple = function(options) {
			expressCreate();
			expressBuild(options);
			return expressListen();
		}
		
		this.expressCreate = function() {
			configRegistry.assertPhaseServer();
			expressCreate();
			return server;
		};
		
		this.expressBuild = function(options) {
			configRegistry.assertPhaseServer();
			expressBuild(options);
		};
		
		this.expressListen = function() {
			configRegistry.assertPhaseServer();
			return expressListen();
		};
	};
})();

module.exports = new mod;

//
//ConfigSetupExpress.prototype.renderTemplatePath = function(viewPath) {
//	if (!viewPath) {
//		viewPath = '';
//	}
//	return function (req, res) {
//		res.locals.query = req.query;
//		var qi = req.url.indexOf('?');
//		if (qi === -1) {
//			qi = req.url.length;
//		}
//		res.render(viewPath + req.url.substring(req.route.path.length-1, qi));
//	};
//}