Vn.Order = new Class
({
	Extends: Vn.Module
	
	,orderId: null
	,currentStep: null

	,activate: function ()
	{
		// Configuring columns
	
		var amount = this.get ('column-amount');
		amount.on ('changed', this.amountChanged.bind (this));
		amount.renderer = this.amountRender;

		this.get ('column-subtotal').renderer = this.subtotalRender.bind (this);
		this.get ('stems').renderer = this.stemsRender.bind (this);
		this.get ('order-total').func = this.subtotal;
		
		// Connecting buttons events

		Vn.get ('delete-order').addEventListener ('click', this.deleteClicked.bind (this));
		Vn.get ('go-catalog').addEventListener ('click', this.catalogClicked.bind (this));
		Vn.get ('checkout-button').addEventListener ('click', this.checkoutClicked.bind (this));
		Vn.get ('go-basket').addEventListener ('click', this.basketClicked.bind (this));
		Vn.get ('confirm-button').addEventListener ('click', this.confirmClicked.bind (this));
		
		// Loading order

		this.orderId = this.get ('order-id');
		
		if (!this.orderId.value)
		{
			var orderId = Vn.Cookie.getInt ('order');
			
			if (!orderId)
			{
				var sql = 'INSERT INTO order_view (date_send) VALUES (CURDATE());'
					+'SELECT LAST_INSERT_ID();';
				this.conn.execQuery (sql, this.orderCreated.bind (this));
			}
			else
				this.orderId.value = orderId;
		}
		
		this.showStep ('basket-step');
	}

	,amountRender: function (renderer, form)
	{
		var amount = form.get ('amount');
		var grouping = form.get ('grouping');
	
		if (amount && grouping)
			renderer.value = amount / grouping;
		else
			renderer.value = null;
	}

	,amountChanged: function (renderer, row, newValue)
	{
		var model = this.get ('order-rows');
		model.set (row, 'amount', newValue * model.get (row, 'grouping'));
	}
	
	,stemsRender: function (renderer, form)
	{
		if (form.get ('amount') > form.get ('available'))
			renderer.td.className = 'available-exceeded';
		else
			renderer.td.className = '';
	}

	,subtotalRender: function (renderer, form)
	{
		renderer.value = this.subtotal (form);
	}

	,subtotal: function (form)
	{
		return form.get ('amount') * form.get ('price')
			* ((100 - form.get ('discount')) / 100);
	}
	
	,availableRender: function (renderer, form)
	{
		if (form.get ('amount') > form.get ('avail'))
			renderer.value = 'unavailable';
		else
			renderer.value = 'invisible';
	}

	,deleteClicked: function ()
	{
		if (confirm (_('SureDelOrder')))
		{
			var gui = this.gui;

			if (Vn.Cookie.getInt ('order') == this.orderId.value)
				Vn.Cookie.unset ('order');

			this.get ('order-form').deleteRow ();
			this.hash.set ({'module': 'orders'});
		}
	}
	
	,catalogClicked: function ()
	{
		Vn.Cookie.set ('order', this.orderId.value);
		this.hash.set ({'module': 'catalog'});
	}

	,showStep: function (stepId)
	{
		if (this.currentStep)
			this.currentStep.style.display = 'none';
			
		this.currentStep = Vn.get (stepId);
		this.currentStep.style.display = 'inline';
	}

	,checkoutClicked: function ()
	{
		this.showStep ('checkout-step');
	}
	
	,basketClicked: function ()
	{
		this.showStep ('basket-step');
	}
	
	,confirmClicked: function ()
	{
		if (!confirm (_('SureConfirmOrder')))
			return;
		
		var query = 'CALL order_confirm (#order)';
			
		var batch = new Sql.Batch ();
		batch.addParam ('order', this.orderId);
	
		this.conn.execQuery (query, this.confirmDone.bind (this), batch);
	}

	,confirmDone: function (resultSet)
	{
		if (resultSet.fetchResult ())
		{
			Vn.Cookie.unset ('order');
			this.hash.set ({'module': 'orders'});
			alert (_('OrderConfirmed'));
		}
		else
		{	
			this.showStep ('basket-step');
			this.get ('order-rows').refresh ();
		}
	}
	
	,orderCreated: function (resultSet)
	{
		var insertOk = resultSet.fetchResult ();
		var orderId = resultSet.fetchValue ();
		
		if (insertOk && orderId)
		{
			this.orderId.value = orderId;
			Vn.Cookie.set ('order', orderId);
		}
		else
			this.hash.set ({'module': 'orders'});
	}
});