/**
 * Adds bindings for the keystone routes
 *
 * ####Example:
 *
 *     var app = express();
 *     app.configure(...); // configuration settings
 *     app.use(...); // middleware, routes, etc. should come before keystone is initialised
 *     keystone.routes(app);
 *
 * @param {Express()} app
 * @api public
 */
function routes(app) {
	this.app = app;
	var keystone = this;

	//Set backend url
	var backend_dir = process.env.BACKEND_DIR ? process.env.BACKEND_DIR : '/keystone';
	this.set('backend dir', backend_dir);

	//catch all for custom admin directoy url
	if(backend_dir != '/keystone'){
		app.all('/keystone*', function(req, res, next){
			if(req.originalMethod == "GET") {
				return res.redirect(backend_dir + req.params[0]);
			}

			if(req.originalMethod == "POST") {
				//need to work this out
				//just getting a POC from the existing codebase
				//Will probably end up switching to headless and
				//using resty-stone or keystone rest
				//and will build out the admin UI custom.
			}
		});
	}

	//Set backend static path for assets if config variable is declared
	if(process.env.BACKEND_STATIC_MOUNT && process.env.BACKEND_STATIC_PATH) {
		var	express = this.express,
			static_mount = process.env.BACKEND_STATIC_MOUNT,
			static_path = require("shelljs").pwd() + process.env.BACKEND_STATIC_PATH;

		this.set('backend static mount', static_mount);
		this.set('backend static path', static_path);

		app.use(static_mount, express.static(static_path));
	}

	/// ensure keystone nav has been initialised
	if (!this.nav) {
		this.nav = this.initNav();
	}

	// Cache compiled view templates if we are in Production mode
	this.set('view cache', this.get('env') === 'production');

	// Bind auth middleware (generic or custom) to /backend_dir* routes, allowing
	// access to the generic signin page if generic auth is used
	if (this.get('auth') === true) {

		if (!this.get('signout url')) {
			this.set('signout url', backend_dir+'/signout');
		}
		if (!this.get('signin url')) {
			this.set('signin url', backend_dir+'/signin');
		}

		if (!this.nativeApp || !this.get('session')) {
			app.all(backend_dir+'*', this.session.persist);
		}

		app.all(backend_dir+'/signin', require('../node_modules/keystone/routes/views/signin'));
		app.all(backend_dir+'/signout', require('../node_modules/keystone/routes/views/signout'));
		app.all(backend_dir+'*', this.session.keystoneAuth);

	} else if ('function' === typeof this.get('auth')) {
		app.all(backend_dir+'*', this.get('auth'));
	}

	// Keystone Admin Route
	app.all(backend_dir, require('../node_modules/keystone/routes/views/home.js'));

	// Email test routes
	if (this.get('email tests')) {
		this.bindEmailTestRoutes(app, this.get('email tests'));
	}

	// Cloudinary API for image uploading (only if Cloudinary is configured)
	if (keystone.get('wysiwyg cloudinary images')) {
		if (!keystone.get('cloudinary config')) {
			throw new Error('KeystoneJS Initialisaton Error:\n\nTo use wysiwyg cloudinary images, the \'cloudinary config\' setting must be configured.\n\n');
		}
		app.post(backend_dir+'/api/cloudinary/upload', require('.../node_modules/keystone/routes/api/cloudinary').upload);
	}

	// Cloudinary API for selecting an existing image from the cloud
	if (keystone.get('cloudinary config')) {
		app.get(backend_dir+'/api/cloudinary/get', require('../node_modules/keystone/routes/api/cloudinary').get);
		app.get(backend_dir+'/api/cloudinary/autocomplete', require('../node_modules/keystone/routes/api/cloudinary').autocomplete);
	}

	var initList = function(protect) {
		return function(req, res, next) {
			req.list = keystone.list(req.params.list);
			if (!req.list || (protect && req.list.get('hidden'))) {
				req.flash('error', 'List ' + req.params.list + ' could not be found.');
				return res.redirect(backend_dir+'');
			}
			next();
		};
	};

	// Generic Lists API
	app.all(backend_dir+'/api/:list/:action', initList(), require('./routes/api.list'));

	// Generic Lists Download Route
	app.all(backend_dir+'/download/:list', initList(), require('../node_modules/keystone/routes/download/list'));

	// List and Item Details Admin Routes
	app.all(backend_dir+'/:list/:page([0-9]{1,5})?', initList(true), require('./routes/view.list'));
	app.all(backend_dir+'/:list/:item', initList(true), require('./routes/view.item'));

	return this;
}

module.exports = routes;