import './Products.html';

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

Tracker.autorun(function() {
	Meteor.subscribe("products");
	Meteor.subscribe("productTags");
	Meteor.subscribe("measures");
});

Template.Products.onCreated(function() {
	Session.set(PREFIX + "displayNewProduct", false);
	Session.set(PREFIX + "showHidden", false);
});
Template.Products.helpers({
	displayNewProduct: function() {
		return Session.get(PREFIX + "displayNewProduct");
	},
	products: function() {
		let skipCount = Session.get(PREFIX + 'skipCount') || 0;
		let query = Session.get(PREFIX + 'searchQuery');
		let dbQuery = [];
		
		if(query) {
			_.each(_.keys(query), function(key) {
				if(_.isFunction(query[key])) dbQuery.push({[key]: query[key]});  //dbQuery[key] = query[key]();
				else if(_.isObject(query[key])) dbQuery.push({[key]: query[key]});  //dbQuery[key] = query[key];  //Will look something like: {$in: [xxx,xxx,xxx]}
				else if(_.isNumber(query[key])) dbQuery.push({[key]: query[key]});  //dbQuery[key] = query[key];
				else {
					//dbQuery[key] = {$regex: query[key], $options: 'i'};
					let searchValue = query[key];
					let searches = searchValue && searchValue.length > 0 ? searchValue.split(/\s+/) : undefined;
					
					for(let search of searches) {
						dbQuery.push({[key]: {$regex: '\\b' + search, $options: 'i'}});
					}
				}
			})
		}
		
		if(!Session.get(PREFIX + "showHidden")) {
			//Ignore any hidden elements by showing those not hidden, or those without the hidden field.
			dbQuery.push({$or: [{hidden: false}, {hidden: {$exists:false}}]});
		}
		
		dbQuery = dbQuery.length > 0 ? {$and: dbQuery} : {};
		Session.set(PREFIX + 'productCount',  Meteor.collections.Products.find(dbQuery).count());  //Always get a full count.
		return Meteor.collections.Products.find(dbQuery, {limit: QUERY_LIMIT, skip: skipCount, sort: {name: 1}});
	},
	disablePrev: function() {
		return (Session.get(PREFIX + 'skipCount') || 0) == 0;
	},
	disableNext: function() {
		return Session.get(PREFIX + 'productCount') - (Session.get(PREFIX + 'skipCount') || 0) - QUERY_LIMIT <= 0;
	}
});
Template.Products.events({
	'click .prevProducts': function(event, template) {
		if(!$(event.target).hasClass('disabled'))
			Session.set(PREFIX + 'skipCount', Math.max(0, (Session.get(PREFIX + 'skipCount') || 0) - QUERY_LIMIT));
	},
	'click .nextProducts': function(event, template) {
		if(!$(event.target).hasClass('disabled'))
			Session.set(PREFIX + 'skipCount', (Session.get(PREFIX + 'skipCount') || 0) + QUERY_LIMIT);
	},
	'click .newProductButton': function(event, template) {
		if(template.$('.newProductButton').hasClass('active')) {
			Session.set(PREFIX + 'displayNewProduct', false);
		}
		else {
			Session.set(PREFIX + 'displayNewProduct', true);
			Session.set(PREFIX + "editedProduct", undefined);  //Clear the edited product so that only one editor is open at a time.
			Session.set(PREFIX + "convertedProduct", undefined);  //Clear the converted product so that only one editor is open at a time.
		}
		template.$('.newProductButton').toggleClass('active');
	},
	'change input[name="showHidden"]': function(event, template) {
		//console.log("changed " + $(event.target).prop('checked'));
		Session.set(PREFIX + "showHidden", $(event.target).prop('checked'));
	}
});

Template.ProductSearch.events({
	"keyup .searchInput": _.throttle(function(event, template) {
		let searchQuery = Session.get(PREFIX + 'searchQuery') || {};
		let searchFields = Session.get(PREFIX + 'searchFields') || {};
		let searchValue = template.$('.searchInput').val();
		
		if(searchValue) {
			if(this.number) searchValue = parseFloat(searchValue);
			
			if(this.collection) {
				let ids = Meteor.collections[this.collection].find({[this.collectionQueryColumnName]: {$regex: searchValue, $options: 'i'}}, {fields: {[this.collectionResultColumnName]: 1}}).fetch();
				
				//Convert the ids to an array of ids instead of an array of objects containing an id.
				for(let i = 0; i < ids.length; i++) {ids[i] = ids[i]._id;}
				searchQuery[this.columnName] = {$in: ids};
				searchFields[this.columnName] = searchValue;
			}
			else {
				searchFields[this.columnName] = searchQuery[this.columnName] = searchValue;
			}
		}
		else {
			//Remove columns from the search query whose values are empty so we don't bother the database with them.
			delete searchQuery[this.columnName];
			delete searchFields[this.columnName];
		}
		
		Session.set(PREFIX + 'searchQuery', searchQuery);
		Session.set(PREFIX + 'searchFields', searchFields);
		Session.set(PREFIX + 'skipCount', 0);  //Reset the paging of the results.
	}, 500)
});
Template.ProductSearch.helpers({
	searchValue: function() {
		let searchFields = Session.get(PREFIX + 'searchFields');
		
		return (searchFields && searchFields[this.columnName]) ? searchFields[this.columnName] : '';
	}
});

Template.Product.helpers({
	measures: function() {
		let result = "";
		
		if(this.measures && this.measures.length > 0) {
			let measureNames = [];
			
			for(let i = 0; i < this.measures.length; i++) {
				let measureObject = Meteor.collections.Measures.findOne(this.measures[i]);
				
				if(measureObject && measureObject.name)
					measureNames.push(measureObject.name);
			}
			
			result = measureNames.join(", ");
		}
		
		return result;
	},
	aliases: function() {
		return this.aliases.join(', ');
	},
	tags: function() {
		let result = "";
		
		if(this.tags && this.tags.length > 0) {
			let tagNames = [];
			
			for(let i = 0; i < this.tags.length; i++) {
				let obj = Meteor.collections.ProductTags.findOne(this.tags[i]);
				
				if(obj && obj.name)
					tagNames.push(obj.name);
			}
			
			result = tagNames.join(", ");
		}
		
		return result;
	},
	editing: function() {
		let editedProduct = Session.get(PREFIX + "editedProduct");
		
		return editedProduct == this._id;
	},
	converting: function() {
		let convertedProduct = Session.get(PREFIX + "convertedProduct");
		
		return convertedProduct == this._id;
	},
	getRowClass: function() {
		return this.hidden ? "hidden" : this.deactivated ? "deactivated" : "";
	}
});
Template.Product.events({
	"click .actionEdit": function(event, template) {
		Session.set(PREFIX + "editedProduct", this._id);
		Session.set(PREFIX + 'displayNewProduct', false);  //Ensure the new product editor is closed.
		Session.set(PREFIX + "convertedProduct", undefined);  //Clear the converted product so that only one editor is open at a time.
		template.$('.newProductButton').removeClass('active');
	},
	"click .actionDeactivate": function(event, template) {
		Meteor.call('deactivateProduct', this._id, function(error, result) {
			if(error) sAlert.error(error);
			else sAlert.success("Product Deactivated");
		});
	},
	'click .actionActivate': function(event, template) {
		Meteor.call('reactivateProduct', this._id, function(error, result) {
			if(error) sAlert.error(error);
			else sAlert.success("Product Reactivated");
		});
	},
	"click .actionShow": function(event, template) {
		Meteor.call('showProduct', this._id, function(error, result) {
			if(error) sAlert.error(error);
			else sAlert.success("Product Visibility Enabled");
		});
	},
	"click .actionConvert": function(event, template) {
		Session.set(PREFIX + "convertedProduct", this._id);
		Session.set(PREFIX + 'displayNewProduct', false);  //Ensure the new product editor is closed.
		Session.set(PREFIX + "editedProduct", undefined);  //Clear the edited product so that only one editor is open at a time.
		template.$('.newProductButton').removeClass('active');
	},
	'click .actionHide': function(event, template) {
		Meteor.call('hideProduct', this._id, function(error, result) {
			if(error) sAlert.error(error);
			else sAlert.success("Product Visibility Disabled");
		});
	}
});


Template.ProductEditor.onRendered(function() {
	this.$(".productTagsEditor").select2();
	this.$(".productAliasesEditor").select2({tags: true, tokenSeparators: [';', '.']});
	this.$(".productMeasuresEditor").select2();
});
Template.ProductEditor.helpers({
	measures: function() {
		return Meteor.collections.Measures.find({});
	},
	measureSelected: function() {
		let measure = this;
		let product = Template.parentData();
		
		return product.measures && product.measures.includes(measure._id) ? "selected" : "";
	},
	aliases: function() {
		return this.aliases;
	},
	tags: function() {
		return Meteor.collections.ProductTags.find({});
	},
	tagSelected: function() {
		let tag = this;
		let product = Template.parentData();
		
		return product.tags && product.tags.includes(tag._id) ? "selected" : "";
	}
});
Template.ProductEditor.events({
	"click .editorCancel": function(event, template) {
		Session.set(PREFIX + "editedProduct", undefined);
		Session.set(PREFIX + 'displayNewProduct', false);
		template.parentTemplate().$('.newProductButton').removeClass('active');
	},
	"click .editorApply": function(event, template) {
		let name = template.$("input[name='name']").val().trim();
		let tags = template.$(".productTagsEditor").select2('data');
		let aliases = template.$(".productAliasesEditor").select2('data');
		let measures = template.$(".productMeasuresEditor").select2('data');
		
		tags = tags.map((n)=>n.id);
		aliases = aliases.map((n)=>n.id);
		measures = measures.map((n)=>n.id);
		
		if(Session.get(PREFIX + 'displayNewProduct')) {
			Meteor.call("createProduct", name, tags, aliases, measures, function(error, result) {
				if(error) sAlert.error(error);
				else {
					sAlert.success("Product created.");
					Session.set(PREFIX + 'displayNewProduct', false);
					template.parentTemplate().$('.newProductButton').removeClass('active');
				}
			});
		}
		else {
			Meteor.call("updateProduct", this._id, name, tags, aliases, measures, function(error, result) {
				if(error) sAlert.error(error);
				else {
					sAlert.success("Product updated.");
					Session.set(PREFIX + "editedProduct", undefined);
					template.parentTemplate().$('.newProductButton').removeClass('active');
				}
			});
		}
	}
});

Template.ConvertProduct.onCreated(function() {
	this.selectedProduct = new ReactiveVar();
});
Template.ConvertProduct.onRendered(function() {
	this.$('[name="product"]').buildCombo({cursor: Meteor.collections.Products.find({$or: [{hidden: false}, {hidden: {$exists:false}}]}), selection: this.selectedProduct, textAttr: 'name', listClass: 'comboList', getClasses: function(data) {
		return (data && data.deactivated) ? "deactivated" : "";
	}});
});
Template.ConvertProduct.events({
	"click .editorCancel": function(event, template) {
		Session.set(PREFIX + "editedProduct", undefined);
		Session.set(PREFIX + "convertedProduct", undefined);
		Session.set(PREFIX + 'displayNewProduct', false);
		template.parentTemplate().$('.newProductButton').removeClass('active');
	},
	"click .editorApply": function(event, template) {
		let productId = template.selectedProduct.get()._id;
		
		Meteor.call("convertProduct", this._id, productId, function(error, result) {
			if(error) sAlert.error(error);
			else {
				sAlert.success("Sales of this product were converted.");
				Session.set(PREFIX + "editedProduct", undefined);
				Session.set(PREFIX + "convertedProduct", undefined);
				Session.set(PREFIX + 'displayNewProduct', false);
				template.parentTemplate().$('.newProductButton').removeClass('active');
			}
		});
	}
});