var service = new voice_comm_service;
var voice_comms = new voice_comm;

function init_page()
{
	voice_comms = new voice_comm( 11, 'Voice Comm Server', 425.50, 500.00, 10, 128, 42.50, 50.00 );
	voice_comms.add_server_type( 60, '55', 'Teamspeak 2', 0.00, 0.00 );
	voice_comms.add_server_type( 61, '50', 'Ventrilo', 0.00, 0.00 );
	voice_comms.add_payment_term( 1, 0.00 );
	voice_comms.add_payment_term( 3, 0.10 );
	voice_comms.add_payment_term( 12, 0.20 );
	voice_comms.add_payment_term( 6, 0.15 );

	// Populate server_type select box
	temp = Array();
	for ( j in voice_comms.server_types )
	{
		temp.push( voice_comms.server_types[j].name + '#:#' + j );
	}
	temp.sort();
	
	server_types_select = document.getElementById( "server_types" ).options;
	j = 0;
	for ( i in temp )
	{
		data = String( temp[ i ] );
		data = data.split( "#:#" );
		temp_option = new Option( data[ 0 ], data[ 1 ], 0, 0 );
		server_types_select[j++] = temp_option;
	}
	service.service_typeid = server_types_select[0].value;
	
	
	// Populate max_clients select box
	max_clients_select = document.getElementById( "max_clients" ).options;
	j = 0;
	for ( i = voice_comms.min_clients; i <= voice_comms.max_clients; i++ )
	{
		temp_option = new Option( i, i, 0, 0 );
		max_clients_select[j++] = temp_option;
	}
	service.max_clients = max_clients_select[0].value;
	
	// Update other stuff
	update_payment_terms();
	update_service();
	update_pricing();
} 

function update_service()
{
	// Service type
	service.server_type = document.getElementById( "server_types" )[document.getElementById( "server_types" ).selectedIndex].value;
	
	// Operating system
	service.max_clients = document.getElementById( "max_clients" )[document.getElementById( "max_clients" ).selectedIndex].value;
	
	// Payment term
	payment_terms = document.getElementById( "actionForm" ).paymentterm;

	if ( 'undefined' != typeof( payment_terms ) )
	{
		for( i = 0; i < payment_terms.length; i++ )
		{
			if ( payment_terms[i].checked )
			{
				service.payment_term = payment_terms[i].value;
			}
		}
	}
}

function update_payment_terms()
{
	payment_terms = document.getElementById( "actionForm" ).paymentterm;
	current_payment_term = 0;

	if ( 'undefined' != typeof( payment_terms ) )
	{
		for( i = 0; i < payment_terms.length; i++ )
		{
			if ( payment_terms[i].checked )
			{
				current_payment_term = payment_terms[i].value;
			}
		}
	}
	else
	{
		current_payment_term = 3;
	}
	
	tdpt = document.getElementById( "td_payment_terms" );
	tdpt.innerHTML = '';
	
	payment_terms = voice_comms.payment_terms;
	
	if ( payment_terms.length > 0 )
	{
		cpt_exists = 0;
		def_pt = 0;
		for( i in payment_terms )
		{
			if ( def_pt == 0 )
			{
				def_pt = payment_terms[i].payment_term;
			}
			
			if ( payment_terms[i] )
			{
				cpt_exists = ( payment_terms[i].payment_term == current_payment_term ) ? 1 : cpt_exists;
			}
		}
		
		if ( cpt_exists == 0 )
		{
			current_payment_term = def_pt;
		}
	
		for( i = 0; i < payment_terms.length; i++ )
		{
			if ( payment_terms[i] )
			{
				checked = ( payment_terms[i].payment_term == current_payment_term ) ? ' checked="checked"' : '';
				tdpt.innerHTML += '<input type="radio" name="paymentterm" value="' + payment_terms[i].payment_term + '" onclick="update_pricing();"' + checked + ' /> ' + payment_terms[i].payment_term + ' Month(s) ( ' + payment_terms[i].discount * 100 + '% discount )<br />'
			}
		}
	}
}

function update_pricing()
{
	update_service();
	
	total = service.cost();
	multiplier = ( 1 - service.discount ) * service.payment_term;
	
	// update breakdown
	td_breakdown = document.getElementById( "breakdown" );
	td_breakdown.innerHTML = voice_comms.name + ": &pound;" + format_currency( Math.round( service.base_cost * multiplier ) / 100 ) + "<br />";
	total = voice_comms.incvat;
	
	td_breakdown.innerHTML += "Server Type: " + voice_comms.server_types[service.server_type].name + ": &pound;" + format_currency( Math.round( service.server_type_cost * multiplier ) / 100 ) + "<br />"
	total += voice_comms.server_types[service.server_type].incvat;

	td_breakdown.innerHTML += "Max Clients: " + service.max_clients + ": &pound;" + format_currency( Math.round( service.max_client_cost * multiplier ) / 100 ) + "<br />"
	total += service.max_client_cost;

	// update running_total
	td_running_total = document.getElementById( "running_total" );
	td_running_total.innerHTML = "&pound;" + format_currency( Math.round( total * multiplier ) / 100 );
	
	// update extra_money_info
	td_extra_money_info = document.getElementById( "extra_money_info" );
	td_extra_money_info.innerHTML = "";
	if ( voice_comms.payment_terms[service.payment_term].discount > 0 )
	{
		td_extra_money_info.innerHTML += "Discount: &pound;" + format_currency( Math.round( service.discount_cost ) / 100 ) + "<br />";
		td_extra_money_info.innerHTML += "Equivalent Monthly: &pound;" + format_currency( Math.round( ( total / service.payment_term * multiplier ) ) /  100 );
	}
}

function format_currency( fAmount )
{
	aAmount = fAmount.toString().split( "." );
	if ( aAmount[1] )
	{
		if ( aAmount[1].length == 1 )
		{
			aAmount[1] += "0";
		}
	} else {
		aAmount[1] = "00";
	}

	return aAmount[0] + "." + aAmount[1];
}