import './Pricing.html';

/**
 * Notes:
 * The Product object has a prices field which is an object whose fields names are Measure ID's.  Each field value (for each Measure ID) is an object that has a 'price', 'effectiveDate', and 'previousPrice'.
 * The effectiveDate field stores the date as a number in the format YYYYMMDD.  Converting this number into a local date is done with moment(sale.date.toString(), "YYYYMMDD").toDate(), and converting it to a number from a date can be accomplished with ~~(moment(date).format("YYYYMMDD")), where the ~~ is a bitwise not and converts a string to a number quickly and reliably.
 * Because the structure of the Product object is so complicated, the normal checking that is done by the framework cannot be used.
 */

let QUERY_LIMIT = 20;
let PREFIX = "Pricing.";

Meteor.subscribe("products");
let measuresSubscription = Meteor.subscribe("measures");
Tracker.autorun(function() {
	let ready = measuresSubscription.ready();
	
	if(ready) {
		console.log("setting selected measure session var");
		let firstMeasure = Meteor.collections.Measures.findOne({}, {sort: {order: 1}, fields: {_id: 1}});
		Session.set(PREFIX + "selectedMeasure", firstMeasure._id);
	}
});

Template.Pricing.onCreated(function() {
});
Template.Pricing.onRendered(function() {
	this.$('input[name="date"]').val(new Date().toDateInputValue());
	// this>$('select[name="measures"]').val()
});
Template.Pricing.helpers({
	measures: function() {
		let measures = Meteor.collections.Measures.find({}, {sort: {order: 1}}).fetch();
		
		for(let i = 0; i < measures; i++) {
			if(Meteor.collections.Products.find({measures: {$all: [measures[i]._id]}}, {sort: {name: 1}}).count() == 0)
				measures.splice(i, 1);  //Remove the measure from the list.
		}
		
		return measures;
	},
	product: function() {
		let skipCount = Session.get(PREFIX + 'skipCount') || 0;
		let measureId = Session.get(PREFIX + "selectedMeasure");
		let dbQuery = {measures: {$all: [measureId]}, $or: [{hidden: false}, {hidden: {$exists:false}}]};
		
		Session.set(PREFIX + 'productCount',  Meteor.collections.Products.find(dbQuery).count());  //Always get a full count.
		return Meteor.collections.Products.find(dbQuery, {limit: QUERY_LIMIT, skip: skipCount, sort: {name: 1}});
	},
	disablePrev: function() {
		return (Session.get(PREFIX + 'skipCount') || 0) == 0;
	},
	disableNext: function() {
		return Session.get(PREFIX + 'productCount') - (Session.get(PREFIX + 'skipCount') || 0) - QUERY_LIMIT <= 0;
	}
});
Template.Pricing.events({
	'change select[name="measures"]': function(event, template) {
		Session.get(PREFIX + 'skipCount', 0);
		Session.set(PREFIX + "selectedMeasure", $(event.target).val());
	},
	'click .applyButton': function(event, template) {
		let measureId = template.$('select[name="measures"]').val();
		let $selectedRows = template.$('tr.selected');
		let price = Number(template.$('input[name="price"]').val());
		let setPrevious = template.$('input[name="setPrevious"]').prop('checked');
		let date = template.$('input[name="date"]').val();
		let productIds = [];
		
		for(let i = 0; i < $selectedRows.length; i++) {
			let product = $($selectedRows[i]).data('product');
			productIds.push(product._id);
		}
		
		if(!price) {
			Meteor.call("clearProductPrice", productIds, measureId)
		}
		else {
			date = ~~(moment(date ? date : new Date().toDateInputValue(), "YYYY-MM-DD").format("YYYYMMDD"));  // The ~~ is a bitwise not which converts the string into a number in the format of YYYYMMDD for storage in the database; to avoid timezone issues.
			setPrevious = setPrevious == true || setPrevious == 'on' || setPrevious == "true" || setPrevious == "yes";
			
			if(setPrevious == true && !date) {
				sAlert.error("Unexpected input.");
			}
			
			if(!price || isNaN(price) || price < 0) {
				sAlert.error("Unexpected input.");
			}
			
			Meteor.call("setProductPrice", productIds, measureId, price, setPrevious, date);
		}
	},
	'click .resetButton': function(event, template) {
		template.$('input.price').val(0);
		template.$('input.date').val(new Date().toDateInputValue());
		template.$('input[name="setPrevious"]').removeProp('checked');
	},
	'click .prevProducts': function(event, template) {
		if(!$(event.target).hasClass('disabled'))
			Session.set(PREFIX + 'skipCount', Math.max(0, (Session.get(PREFIX + 'skipCount') || 0) - QUERY_LIMIT));
	},
	'click .nextProducts': function(event, template) {
		if(!$(event.target).hasClass('disabled'))
			Session.set(PREFIX + 'skipCount', (Session.get(PREFIX + 'skipCount') || 0) + QUERY_LIMIT);
	}
});

Template.PricingForProduct.onRendered(function() {
	this.$('tr').data("product", this.data);
});
Template.PricingForProduct.helpers({
	currentPrice: function() {
		let measureId = Session.get(PREFIX + "selectedMeasure");
		let price = this.prices && measureId && this.prices[measureId] && this.prices[measureId].price ? this.prices[measureId].price : undefined;
		
		return price ? price.toLocaleString("en-US", {style: 'currency', currency: 'USD', minimumFractionDigits: 2}) : "-";
	},
	previousPrice: function() {
		let measureId = Session.get(PREFIX + "selectedMeasure");
		let price = this.prices && measureId && this.prices[measureId] && this.prices[measureId].previousPrice ? this.prices[measureId].previousPrice : undefined;
		
		return price ? price.toLocaleString("en-US", {style: 'currency', currency: 'USD', minimumFractionDigits: 2}) : "-";
	},
	priceChangeDate: function() {
		let measureId = Session.get(PREFIX + "selectedMeasure");
		
		return this.prices && measureId && this.prices[measureId] && this.prices[measureId].effectiveDate ? moment(this.prices[measureId].effectiveDate.toString(), "YYYYMMDD").format("MM/DD/YYYY (w)") : "-";
	},
	rowClass: function() {
		return this.deactivated ? "deactivated" : "";
	}
});
Template.PricingForProduct.events({
	'click tr': function(event, template) {
		let $row = template.$(event.target).closest("tr");
		let parentTemplate = template.parentTemplate(1);
	
		if(event.shiftKey) {
			let $lastRow = parentTemplate.$lastClickedRow;
			let $range = ($row.index() > $lastRow.index() ? $lastRow.nextUntil($row) : $row.nextUntil($lastRow)).add($row);
			
			if(event.ctrlKey) {
				$range.toggleClass("selected");
			}
			else {
				$range.addClass("selected");
			}
		}
		else if(event.ctrlKey) {
			$row.toggleClass("selected");
		}
		else {
			$row.addClass("selected");
			$row.siblings().removeClass('selected');
		}
		
		//Store the last row clicked on in a non-reactive variable attached to the parent template.
		parentTemplate.$lastClickedRow = $row;
	}
});