/* global variables usefull for discounts */
var discount = false;
var discount_package;
var discount_student;
var discount_proceedings;
var discount_onlytutos;
var discount_social;
var discount_free = false;
var discount_amount = 0;

function expand(id) {
	/*document.getElementById(id).style.pixelWidth = '650px';*/
}

function contract(id) {
	/*document.getElementById(id).style.pixelWidth = '330px';*/
}

/* function library dedicated to registration */
window.addEvent('domready', function(){ check = new FormCheck('formular', {
	display : {
		showErrors : 1,
		errorsLocation : 1,
		indicateErrors : 1
	}
});
});

window.addEvent('domready', function() { new Uniform('formular',{
	valid_class: 'valid',
	invalid_class: 'invalid',
	focused_class: 'focused',
	holder_class: 'ctrlHolder',
	field_selector: 'input, select, textarea'
});
});


/* actions to be done first ! */
function load() {
	if (typeof(check)=="undefined") {
		check = new FormCheck('formular', {
			display : {
				showErrors : 1,
				errorsLocation : 1,
				indicateErrors : 1
			}
		});
		
		new Uniform('formular',{
			valid_class: 'valid',
			invalid_class: 'invalid',
			focused_class: 'focused',
			holder_class: 'ctrlHolder',
			field_selector: 'input, select, textarea'
		});
	}
	
	if ($chk($('pconf'))) {
		submit_paper();
		compute_program();
		$('discount_update').addEvent('click', function(){ discountRequest(); });
	}
	
	if ($chk($('final_form'))) {
		$('final_form').submit();
	}
}

/* update the "paper information" part */
function submit_paper() {
	/* if the participant has submitted a paper */
	if (($('pconf').value != "none")) {
		/* display fields for paper information */
		$('holder_pid').setStyle('display', 'block');
		$('holder_ptitle').setStyle('display', 'block');
		
		/* add constraints on those fields */
		var pid = $('pid');
		check.dispose(pid); 
		pid.addClass("validate['required','num']");
		check.register(pid);
		
		/* idem */
		var ptitle = $('ptitle');
		check.dispose(ptitle); 
		ptitle.addClass("validate['required']");
		check.register(ptitle);
		
	/* otherwise, paper information are not necessary */
	} else {
		$('holder_pid').setStyle('display', 'none');
		$('holder_ptitle').setStyle('display', 'none');
		check.dispose($('pid')); 
		check.dispose($('ptitle'));
	}
}

/* select & update "conference information" part */
function compute_program() {
	/* get the package value */
	var type = $('package').value;
	
	/* hide all fields (start state) */
	$('work_program_2days').setStyle('display', 'none');
	$('work_program_1day').setStyle('display', 'none');
	$('conf_program').setStyle('display', 'none');
	
	/* if the package is the "full" one */
	if (type == "full") {
		$('work_program_2days').setStyle('display', 'block');
		$('conf_program').setStyle('display', 'block');

		/* basically, the social event is included into this package */
		/* but, in case of special discount, the social event can be excluded */
		if (discount && !discount_social) {
			$('social_event').set('checked',false);
			$('social_event').set('disabled',false);
		} else {
			$('social_event').set('checked',true);
			$('social_event').set('disabled',true);
		}
		
		/* add cosntraints to the conference selector */
		var confchoice = $('pn09');
		check.dispose(confchoice); 
		confchoice.addClass("validate['required']");
		check.register(confchoice);
		
	/* if the package is the "conf-plus" one */
	} else if (type == "conf-plus") {
		$('work_program_1day').setStyle('display', 'block');
		$('conf_program').setStyle('display', 'block');

		/* basically, the social event is included into this package */
		/* but, in case of special discount, the social event can be excluded */
		if (discount && !discount_social) {
			$('social_event').set('checked',false);
			$('social_event').set('disabled',false);
		} else {
			$('social_event').set('checked',true);
			$('social_event').set('disabled',true);
		}

		/* add constraints to the conference selector */
		var confchoice = $('pn09');
		check.dispose(confchoice); 
		confchoice.addClass("validate['required']");
		check.register(confchoice);
		
	/* if the package is the "conf" one */
	} else if (type == "conf") {
		$('conf_program').setStyle('display', 'block');

		/* basically, the social event is included into this package */
		/* but, in case of special discount, the social event can be excluded */
		if (discount && !discount_social) {
			$('social_event').set('checked',false);
			$('social_event').set('disabled',false);
		} else {
			$('social_event').set('checked',true);
			$('social_event').set('disabled',true);
		}

		/* add constraints to the conference selector */
		var confchoice = $('pn09');
		check.dispose(confchoice); 
		confchoice.addClass("validate['required']");
		check.register(confchoice);

	/* if the package is the "tut-two" one */
	} else if (type =="tut-two") {
		/* uncheck conference selector */
		$('pn09').set('checked',false);
		$('rsp09').set('checked',false);
		
		$('work_program_2days').setStyle('display', 'block');

		/* basically, the social event is included into this package */
		/* but, in case of special discount, the social event can be excluded */
		if (discount && discount_social) {
			$('social_event').set('checked',true);
			$('social_event').set('disabled',true);
		} else {
			$('social_event').set('checked',false);
			$('social_event').set('disabled',false);
		}
		
		/* remove constraints on conference selector */
		var confchoice = $('pn09');
		check.dispose(confchoice); 

	/* if the package is the "tut-two" one */
	} else if (type =="tut-one") {
		$('pn09').set('checked',false);
		$('rsp09').set('checked',false);
		
		$('work_program_1day').setStyle('display', 'block');

		/* basically, the social event is included into this package */
		/* but, in case of special discount, the social event can be excluded */
		if (discount && discount_social) {
			$('social_event').set('checked',true);
			$('social_event').set('disabled',true);
		} else {
			$('social_event').set('checked',false);
			$('social_event').set('disabled',false);
		}

		/* remove constraints on conference selector */
		var confchoice = $('pn09');
		check.dispose(confchoice);
	}
	
	/* proceedings must be updated among the type of selected conferences */
	update_proceedings();
}

/* select & update the "proceedings part" */
function update_proceedings() {
	/* fetch and store current state of proceedings checkbox */
	var prev_pn_proceedings = ($('pn_proceedings').get('disabled'))?false:$('pn_proceedings').get('checked');
	var prev_rsp_proceedings = ($('rsp_proceedings').get('disabled'))?false:$('rsp_proceedings').get('checked');

	/* if pn09 conference is selected... */
	if ($('pn09').get('checked') == true) {

		/* if the discount does not include the proceedings... */
		if (discount && !discount_proceedings) {
			$('pn_proceedings').set('checked',false);
			$('pn_proceedings').set('disabled',false);
		} else {
			$('pn_proceedings').set('checked',true);
			$('pn_proceedings').set('disabled',true);
		}

		/* display petri nets specific reduction fields */
		$('reduc_pn').setStyle('display','block');
		$('reduc_pn').set('disabled',false);
		
		var sig = $('sig');
		check.register(sig);
		var eatcs = $('eatcs');
		check.register(eatcs);
	}
	
	/* if pn09 is not selected */
	if ($('pn09').get('checked') == false) {
		$('pn_proceedings').set('checked',prev_pn_proceedings);
		$('pn_proceedings').set('disabled',false);

		/* hide petri nets specific reduction fields */
		$('reduc_pn').value = 0;
		$('reduc_pn').setStyle('display','none');
		$('reduc_pn').set('disabled',true);

		var sig = $('sig');
		check.dispose(sig);
		var eatcs = $('eatcs');
		check.dispose(eatcs);
	}

	/* if rsp09 conference is selected... */
	if ($('rsp09').get('checked') == true) {
		
		if (discount && !discount_proceedings) {
			$('rsp_proceedings').set('checked',false);
			$('rsp_proceedings').set('disabled',false);
		} else {
			$('rsp_proceedings').set('checked',true);
			$('rsp_proceedings').set('disabled',true);
		}
		
		var ieee = $('ieee');
		check.register(ieee);

		/* display petri nets specific reduction fields */
		$('reduc_rsp').setStyle('display','block');
		$('reduc_rsp').set('disabled',false);
	}

	/* if rsp09 is not selected */
	if ($('rsp09').get('checked') == false) {
		$('rsp_proceedings').set('checked',prev_rsp_proceedings);
		$('rsp_proceedings').set('disabled',false);

		/* hide petri nets specific reduction fields */
		$('reduc_rsp').value = 0;
		$('reduc_rsp').setStyle('display','none');
		$('reduc_rsp').set('disabled',true);
		
		var ieee = $('ieee');
		check.dispose(ieee);
	}

	/* in case of student status, reduction cannot apply */
	if ($('student_state').get('checked')) {
		$('reduc_rsp').setStyle('display','none');
		$('reduc_rsp').set('disabled',true);
		$('reduc_pn').setStyle('display','none');
		$('reduc_pn').set('disabled',true);
	}
	
	/* must update fees to take into account proceedings and reductions */
	update_fees();
}

/* compute the fees */
function update_fees() {
	var total = 0;
	var student = ($('student_state').get('checked') == true);
	
	var rsp_reduc = ($('ieee').value > 0)?100:0;
	var pn_reduc = ($('eatcs').value > 0)?50:($('sig').value > 0)?50:0;
	
	var type_package = $('package').value;
	var dayone = $('program_day1').value;
	var daytwo = $('program_day2').value;
	var cost_package = 0;
	var cost_proceedings = 0;
	var cost_banquet = 0;
	
	var discount_status = (discount || (discount_amount > 0) || discount_free);
	
	
	// Package
	if (type_package == "full") {
		cost_package = (!student)?650:400;
		cost_package -= (!student && !discount_status)?rsp_reduc:0;
		cost_package -= (!student && !discount_status)?pn_reduc:0;

		/* in case of discount, package is free */
		if (discount && (discount_package == "full")) { cost_package = 0; }
		/* check whether the social event is included into the discount */
		if (!discount || (discount && discount_social)) { cost_banquet =  -75; }
		/* check whether the proceedings is included into the discount */
		if (!discount || (discount && discount_proceedings)) { cost_proceedings = -45; }
		
	} else if (type_package == "conf-plus") {
		cost_package = (!student)?650:350;
		cost_package -= (!student && !discount_status)?rsp_reduc:0;
		cost_package -= (!student && !discount_status)?pn_reduc:0;

		/* in case of discount, package is free */
		if (discount && (discount_package == "conf-plus")) { cost_package = 0; }
		/* check whether the social event is included into the discount */
		if (!discount || (discount && discount_social)) { cost_banquet =  -75; }
		/* check whether the proceedings is included into the discount */
		if (!discount || (discount && discount_proceedings)) { cost_proceedings = -45; }
		
	} else if (type_package == "conf") {
		cost_package = (!student)?500:300;
		cost_package -= (!student && !discount_status)?rsp_reduc:0;
		cost_package -= (!student && !discount_status)?pn_reduc:0;

		/* in case of discount, package is free */
		if (discount && (discount_package == "conf")) { cost_package = 0; }
		/* check whether the social event is included into the discount */
		if (!discount || (discount && discount_social)) { cost_banquet =  -75; }
		/* check whether the proceedings is included into the discount */
		if (!discount || (discount && discount_proceedings)) { cost_proceedings = -45; }
		
	} else if (type_package == "tut-two") {
		cost_package = (!student)?200:100;
		/* in case of discount, package is free */
		if (discount && (discount_package == "tut-two")) { cost_package = 0; }

	} else if (type_package == "tut-one") {
		cost_package = (!student)?150:75;
		/* in case of discount, package is free */
		if (discount && (discount_package == "tut-one")) { cost_package = 0; }
	}
	
	/* proceedings */
	if ($('rsp_proceedings').get('checked')) { cost_proceedings += 45; };
	if ($('pn_proceedings').get('checked'))  { cost_proceedings += 45; };
	
	/* cost of the social event */
	if ($('social_event').get('checked'))  { cost_banquet += 75; };
	
	/* are there any extra ticket ordered ? */
	var extra = $('social').value * 75;
	
	/* check wether a tutorial restriction is applied and if workshop have been selected */
	if (discount && discount_onlytutos) {
		if ((dayone != "") && ((type_package == "tut-one") || (type_package == "conf-plus"))) {
			if ((dayone == "1d_1") || (dayone == "1d_3") || (dayone == "1d_14")) {
				cost_package += 50;
			}
		} else if ((daytwo != "") && ((type_package == "tut-two") || (type_package == "full"))) {
			if ((daytwo == "2d_1") || (daytwo == "2d_2") ||
				(daytwo == "2d_3") || (daytwo == "2d_4") ||
				(daytwo == "2d_5") || (daytwo == "2d_6") ||
				(daytwo == "2d_7") || (daytwo == "2d_8") ||
				(daytwo == "2d_9") || (daytwo == "2d_29") ||
				(daytwo == "2d_30") || (daytwo == "2d_31") ||
				(daytwo == "2d_10") || (daytwo == "2d_32") ||
				(daytwo == "2d_33") || (daytwo == "2d_31") ||
				(daytwo == "2d_30") || (daytwo == "2d_34")) {
					cost_package += 50;
				}
		}
	}
	
	/* final computation */
	if (cost_proceedings < 0) { cost_proceedings = 0 };
	total = cost_proceedings + cost_package + cost_banquet + extra;
	
	/* if an aboslute discount is required */
	if (discount_amount > 0) { total -= discount_amount; }

	/* if a free ticket is used */
	if (discount_free) { total = 0; }
	
	if (total < 0) { total = 0 };
	$('total').set('html',total);
}

/* ask for a discount */
function discountRequest(){
	var discount_code = $('discount').value;

	var req = new Request({
		url: 'lib/promo.php?promo_code='+discount_code,

		/* in cas of success */
		onSuccess: function(ret){

			if (ret == "") {
				$('package').set('disabled',false);
				$('social_event').set('disabled',false);
				$('student_state').set('disabled',false);
				
				$('discount_result').setStyle('display','none');
				discount = false;
				discount_package = "";
				discount_student = "";
				discount_proceedings = "";
				discount_onlytutos = "";
				discount_social = "";
				discount_free = false;
				discount_amount = 0;
				compute_program();
				return;
			}
			
			if (ret == "invalid") {
				$('package').set('disabled',false);
				$('social_event').set('disabled',false);
				$('student_state').set('disabled',false);
				
				discount = false;
				discount_package = "";
				discount_student = "";
				discount_proceedings = "";
				discount_onlytutos = "";
				discount_social = "";
				discount_free = false;
				discount_amount = 0;
				$('discount_result').setStyle('display','block');
				$('discount_result').setStyle('color','#BE3C42');
				$('discount_result').setText('This code is invalid');
				compute_program();
				return;
			}
			
			if (ret == "used") {
				$('package').set('disabled',false);
				$('social_event').set('disabled',false);
				$('student_state').set('disabled',false);
				
				discount = false;
				discount_package = "";
				discount_student = "";
				discount_proceedings = "";
				discount_onlytutos = "";
				discount_social = "";
				discount_free = false;
				discount_amount = 0;
				$('discount_result').setStyle('display','block');
				$('discount_result').setStyle('color','#BE3C42');
				$('discount_result').setText('This code has already been used');
				compute_program();
				return;
			}

			/* split the return in several parts */
			var reg=new RegExp("@", "g");
			var constraints=ret.split(reg);

			/* browse all constraints */
			for (var i=0; i<constraints.length; i++) {

				/* split a constraint into key|value format */
				var sep=new RegExp(":", "g");
				var prop=constraints[i].split(sep);

				switch (prop[0]) {
					case "pack": 
						$('package').set('value',prop[1]);
						$('package').set('disabled',true); /* disabled */
						discount_package = prop[1];
						discount = true;
						break;
					case "social":
						$('social_event').set('checked',(prop[1] == "on"))
						$('social_event').set('disabled',(prop[1] == "on"));
						discount_social = (prop[1] == "on");
						break;
					case "proc":
						discount_proceedings = (prop[1] == "on");
						break;
					case "tutos":
						discount_onlytutos = (prop[1] == "on");
						break;
					case "student":
						$('student_state').set('checked',(prop[1] == "on"));
						$('student_state').set('disabled',true);
						discount_student = (prop[1] == "on");
						break;
					case "free":
						discount = false;
						discount_free = (prop[1] == "on");
						break;
					case "amount":
						discount = false;
						discount_amount = prop[1];
						break;
				}
			}
			/* resync all fields */
			$('discount_result').setStyle('display','block');
			$('discount_result').setText('Discount OK... The form has been updated!');
			$('discount_result').setStyle('color','#447647');
			compute_program();
		},
		
		/* in case of failure */
		onFailure: function(){ alert("Error during discount processing!") }
	});
	
	req.send();
};