frappe.provide("erpnext.pos");
{% include "erpnext/public/js/controllers/taxes_and_totals.js" %}

frappe.pages['pos'].on_page_load = function (wrapper) {
	var page = frappe.ui.make_app_page({
		parent: wrapper,
		title: __('Point of Sale'),
		single_column: true
	});

	wrapper.pos = new erpnext.pos.PointOfSale(wrapper)
}

frappe.pages['pos'].refresh = function (wrapper) {
	window.onbeforeunload = function () {
		return wrapper.pos.beforeunload()
	}
}

erpnext.pos.PointOfSale = erpnext.taxes_and_totals.extend({
	init: function (wrapper) {
		this.page_len = 20;
		this.page = wrapper.page;
		this.wrapper = $(wrapper).find('.page-content');
		this.set_indicator();
		this.onload();
		this.make_menu_list();
		this.si_docs = this.get_doc_from_localstorage();
	},

	beforeunload: function (e) {
		if (this.connection_status == false && frappe.get_route()[0] == "pos") {
			e = e || window.event;

			// For IE and Firefox prior to version 4
			if (e) {
				e.returnValue = __("You are in offline mode. You will not be able to reload until you have network.");
				return
			}

			// For Safari
			return __("You are in offline mode. You will not be able to reload until you have network.");
		}
	},

	check_internet_connection: function () {
		var me = this;
		//Check Internet connection after every 30 seconds
		setInterval(function () {
			me.set_indicator();
		}, 5000)
	},

	set_indicator: function () {
		var me = this;
		// navigator.onLine
		this.connection_status = false;
		this.page.set_indicator(__("Offline"), "grey")
		frappe.call({
			method: "frappe.handler.ping",
			callback: function (r) {
				if (r.message) {
					me.connection_status = true;
					me.page.set_indicator(__("Online"), "green")
				}
			}
		})
	},

	onload: function () {
		var me = this;
		this.get_data_from_server(function () {
			me.create_new();
		});
	},

	make_menu_list: function () {
		var me = this;

		this.page.add_menu_item(__("New Sales Invoice"), function () {
			me.save_previous_entry();
			me.create_new();
		})

		this.page.add_menu_item(__("Sync Master Data"), function () {
			me.get_data_from_server(function () {
				me.load_data(false);
				me.make_customer();
				me.make_item_list();
				me.set_missing_values();
			})
		});

		this.page.add_menu_item(__("Sync Offline Invoices"), function () {
			me.sync_sales_invoice()
		});

		this.page.add_menu_item(__("Email"), function () {
			if(me.frm.doc.docstatus == 1) {
				me.email_prompt()
			}
		});

		this.page.add_menu_item(__("POS Profile"), function () {
			frappe.set_route('List', 'POS Profile');
		});
	},

	email_prompt: function() {
		var me = this;
		fields = [{label:__("To"), fieldtype:"Data", reqd: 0, fieldname:"recipients",length:524288},
			{fieldtype: "Section Break", collapsible: 1, label: "CC & Standard Reply"},
			{fieldtype: "Section Break"},
			{label:__("Subject"), fieldtype:"Data", reqd: 1,
				fieldname:"subject",length:524288},
			{fieldtype: "Section Break"},
			{label:__("Message"), fieldtype:"Text Editor", reqd: 1,
				fieldname:"content"},
			{fieldtype: "Section Break"},
			{fieldtype: "Column Break"}];

		this.email_dialog = new frappe.ui.Dialog({
			title: "Email",
			fields: fields,
			primary_action_label: __("Send"),
			primary_action: function() {
				me.send_action();
			}
		});

		this.email_dialog.show()
	},

	send_action: function() {
		this.email_queue = this.get_email_queue()
		this.email_queue[this.frm.doc.offline_pos_name] = JSON.stringify(this.email_dialog.get_values())
		this.update_email_queue()
		this.email_dialog.hide()
	},

	update_email_queue: function () {
		try {
			localStorage.setItem('email_queue', JSON.stringify(this.email_queue));
		} catch (e) {
			frappe.throw(__("LocalStorage is full, did not save"))
		}
	},

	get_email_queue: function () {
		try {
			return JSON.parse(localStorage.getItem('email_queue')) || {};
		} catch (e) {
			return {}
		}
	},

	dialog_actions: function () {
		var me = this;

		$(this.list_body).find('.list-column').click(function () {
			me.name = $(this).parents().attr('invoice-name')
			me.edit_record();
		})

		$(this.list_body).find('.list-select-all').click(function () {
			me.removed_items = [];
			$(me.list_body).find('.list-delete').prop("checked", $(this).is(":checked"))
			if ($(this).is(":checked")) {
				$.each(me.si_docs, function (index, data) {
					for (key in data) {
						me.removed_items.push(key)
					}
				})
			}

			me.toggle_primary_action();
		})

		$(this.list_body).find('.list-delete').click(function () {
			me.name = $(this).parent().parent().attr('invoice-name');
			if ($(this).is(":checked")) {
				me.removed_items.push(me.name);
			} else {
				me.removed_items.pop(me.name)
			}

			me.toggle_primary_action();
		})
	},

	edit_record: function () {
		var me = this;

		doc_data = this.get_invoice_doc(this.si_docs);
		if (doc_data) {
			this.frm.doc = doc_data[0][this.name];
			this.set_missing_values();
			this.refresh(false);
			this.disable_input_field();
			this.list_dialog && this.list_dialog.hide();
		}
	},

	delete_records: function () {
		var me = this;
		this.remove_doc_from_localstorage()
		this.update_localstorage();
		this.dialog_actions();
		this.toggle_primary_action();
	},

	toggle_primary_action: function () {
		var me = this;
		if(this.frm.doc.allow_delete) {
			if (this.removed_items && this.removed_items.length > 0) {
				$(this.wrapper).find('.btn-danger').show();
			} else {
				$(this.wrapper).find('.btn-danger').hide();
			}
		}
	},

	get_doctype_status: function (doc) {
		if (doc.docstatus == 0) {
			return { status: "Draft", indicator: "red" }
		} else if (doc.outstanding_amount == 0) {
			return { status: "Paid", indicator: "green" }
		} else {
			return { status: "Submitted", indicator: "blue" }
		}
	},

	set_missing_values: function () {
		var me = this;
		doc = JSON.parse(localStorage.getItem('doc'))
		if (this.frm.doc.payments.length == 0) {
			this.frm.doc.payments = doc.payments;
			this.calculate_outstanding_amount();
		}

		if (this.frm.doc.customer) {
			this.party_field.$input.val(this.frm.doc.customer);
		}

		if (!this.frm.doc.write_off_account) {
			this.frm.doc.write_off_account = doc.write_off_account
		}

		if (!this.frm.doc.account_for_change_amount) {
			this.frm.doc.account_for_change_amount = doc.account_for_change_amount
		}
	},

	get_invoice_doc: function (si_docs) {
		var me = this;
		this.si_docs = this.get_doc_from_localstorage();

		return $.grep(this.si_docs, function (data) {
			for (key in data) {
				return key == me.name
			}
		})
	},

	get_data_from_server: function (callback) {
		var me = this;
		frappe.call({
			method: "erpnext.accounts.doctype.sales_invoice.pos.get_pos_data",
			freeze: true,
			freeze_message: __("Master data syncing, it might take some time"),
			callback: function (r) {
				me.init_master_data(r)
				localStorage.setItem('doc', JSON.stringify(r.message.doc));
				me.set_interval_for_si_sync();
				me.check_internet_connection();
				if (callback) {
					callback();
				}
			}
		})
	},

	init_master_data: function (r) {
		var me = this;
		this.meta = r.message.meta;
		this.item_data = r.message.items;
		this.item_groups = r.message.item_groups;
		this.customers = r.message.customers;
		this.serial_no_data = r.message.serial_no_data;
		this.batch_no_data = r.message.batch_no_data;
		this.tax_data = r.message.tax_data;
		this.price_list_data = r.message.price_list_data;
		this.bin_data = r.message.bin_data;
		this.pricing_rules = r.message.pricing_rules;
		this.print_template = r.message.print_template;
		this.pos_profile_data = r.message.pos_profile;
		this.default_customer = r.message.default_customer || null;
		this.print_settings = locals[":Print Settings"]["Print Settings"];
		this.letter_head = (this.pos_profile_data.length > 0) ? frappe.boot.letter_heads[this.pos_profile_data[letter_head]] : {};
	},

	save_previous_entry: function () {
		if (this.frm.doc.docstatus < 1 && this.frm.doc.items.length > 0) {
			this.create_invoice();
		}
	},

	create_new: function () {
		var me = this;
		this.frm = {}
		this.name = null;
		this.load_data(true);
		this.setup();
	},

	load_data: function (load_doc) {
		var me = this;

		this.items = this.item_data;
		this.actual_qty_dict = {};

		if (load_doc) {
			this.frm.doc = JSON.parse(localStorage.getItem('doc'));
		}

		$.each(this.meta, function (i, data) {
			frappe.meta.sync(data)
			locals["DocType"][data.name] = data;
		})

		this.print_template_data = frappe.render_template("print_template", {
			content: this.print_template,
			title: "POS", base_url: frappe.urllib.get_base_url(), print_css: frappe.boot.print_css,
			print_settings: this.print_settings, header: this.letter_head.header, footer: this.letter_head.footer
		})
	},

	setup: function () {
		this.frm.doc.allow_delete = this.pos_profile_data["allow_delete"];
		this.wrapper.html(frappe.render_template("pos", this.frm.doc));
		this.set_transaction_defaults("Customer");
		this.make();
		this.set_primary_action();
	},

	set_transaction_defaults: function (party) {
		var me = this;
		this.party = party;
		this.price_list = (party == "Customer" ?
			this.frm.doc.selling_price_list : this.frm.doc.buying_price_list);
		this.price_list_field = (party == "Customer" ? "selling_price_list" : "buying_price_list");
		this.sales_or_purchase = (party == "Customer" ? "Sales" : "Purchase");
	},

	make: function () {
		this.make_search();
		this.make_list_customers();
		this.make_customer();
		this.make_item_list();
		this.bind_numeric_keypad();
		this.make_discount_field()
	},

	make_search: function () {
		var me = this;
		this.serach_item = frappe.ui.form.make_control({
			df: {
				"fieldtype": "Data",
				"label": "Item",
				"fieldname": "pos_item",
				"placeholder": __("Search Item")
			},
			parent: this.wrapper.find(".search-item"),
			only_input: true,
		});

		this.serach_item.make_input();
		this.serach_item.$input.on("keyup", function () {
			setTimeout(function () {
				me.items = me.get_items();
				me.make_item_list();
			}, 1000);
		});

		this.search_item_group = frappe.ui.form.make_control({
			df: {
				"fieldtype": "Select",
				"options": me.item_groups,
				"label": __("Item Group"),
				"fieldname": "item_group",
				"placeholder": __("Item Group")
			},
			parent: this.wrapper.find(".search-item-group"),
			only_input: true,
		});

		this.search_item_group.make_input();
		this.search_item_group.$input.on("change", function () {
			me.page_len = 20;
			me.items = me.get_items();
			me.make_item_list();
		});

		this.wrapper.find(".btn-more").on("click", function() {
			me.page_len += 20;
			me.items = me.get_items();
			me.make_item_list();
		})
	},

	make_list_customers: function () {
		var me = this;
		this.list_customers_btn = this.wrapper.find('.list-customers-btn');
		this.add_customer_btn = this.wrapper.find('.add-customer-btn');
		this.pos_bill = this.wrapper.find('.pos-bill').hide();
		this.list_customers = this.wrapper.find('.list-customers');
		this.numeric_keypad = this.wrapper.find('.numeric_keypad');

		this.list_customers_btn.on('click', function () {
			$(this).toggleClass("view_customer");
			if($(this).hasClass("view_customer")) {
				me.render_list_customers();
				me.bind_delete_event()
				me.party_field.$input.attr('disabled', true);
				me.list_customers.show();
				me.pos_bill.hide();
				me.numeric_keypad.hide();
			} else {
				if(me.frm.doc.docstatus == 0) {
					me.party_field.$input.attr('disabled', false);
				}
				me.pos_bill.show();
				me.list_customers.hide()
				if(me.frm.doc.items.length > 0) {
					me.numeric_keypad.show();
				}
			}
		});
		this.add_customer_btn.on('click', function() {
			me.save_previous_entry();
			me.create_new();
			me.refresh();
			me.set_focus();
		});
	},
	
	bind_numeric_keypad: function() {
		var me = this;
		$(this.numeric_keypad).find('.pos-operation').on('click', function(){
			me.numeric_val = '';
		})

		$(this.numeric_keypad).find('.numeric-keypad').on('click', function(){
			me.numeric_id = $(this).attr("id") || me.numeric_id;
			me.val = $(this).attr("val")
			if(me.val && me.numeric_id) {
				me.selected_field = $(me.wrapper).find('.selected-item').find('.' + me.numeric_id)
				me.numeric_val += me.val;
				me.selected_field.val(flt(me.numeric_val))
				me.selected_field.trigger("change")
				me.render_selected_item()
			}
		})
		
		$(this.numeric_keypad).find('.numeric-del').click(function(){
			me.selected_field = $(me.wrapper).find('.selected-item').find('.' + me.numeric_id)
			me.numeric_val = cstr(flt(me.selected_field.val())).slice(0, -1);
			me.selected_field.val(me.numeric_val);
			me.selected_field.trigger("change")
			me.render_selected_item()
		})
		
		$(this.numeric_keypad).find('.pos-pay').click(function(){
			me.validate();
			me.update_paid_amount_status(true);
			me.create_invoice();
			me.make_payment();
		})
	},

	render_list_customers: function () {
		var me = this;

		this.removed_items = [];
		this.list_customers.empty();
		this.si_docs = this.get_doc_from_localstorage();

		if (!this.si_docs.length) {
			this.list_customers.append(
				'<div style="padding: 12px; margin-left:-12px;">' + __("No offline records.") + '</div>'
			)
			return;
		}
		var html = '<div class="row list-row list-row-head pos-invoice-list">\
			<div class="col-xs-1"><input class="list-select-all" type="checkbox"></div>\
			<div class="col-xs-3">Customer</div>\
			<div class="col-xs-2 text-left">Status</div>\
			<div class="col-xs-3 text-right">Paid Amount</div>\
			<div class="col-xs-3 text-right">Grand Total</div>\
		</div>';
		this.si_docs.forEach(function (data, i) {
			for (key in data) {
				html += frappe.render_template("pos_invoice_list", {
					sr: i + 1,
					name: key,
					customer: data[key].customer,
					paid_amount: format_currency(data[key].paid_amount, me.frm.doc.currency),
					grand_total: format_currency(data[key].grand_total, me.frm.doc.currency),
					data: me.get_doctype_status(data[key])
				});
			}
		});
		this.list_customers.append(html);

		this.list_customers.find('.list-column').click(function () {
			me.list_customers.hide();
			me.list_customers_btn.toggleClass("view_customer");
			me.pos_bill.show();
			me.list_customers_btn.show();
			me.name = $(this).parents().attr('invoice-name')
			me.edit_record();
		})

		//actions
		$(this.wrapper).find('.list-select-all').click(function () {
			me.list_customers.find('.list-delete').prop("checked", $(this).is(":checked"))
			me.removed_items = [];
			if ($(this).is(":checked")) {
				$.each(me.si_docs, function (index, data) {
					for (key in data) {
						me.removed_items.push(key)
					}
				});
			}

			me.toggle_primary_action();
		});

		$(this.wrapper).find('.list-delete').click(function () {
			me.name = $(this).parent().parent().attr('invoice-name');
			if ($(this).is(":checked")) {
				me.removed_items.push(me.name);
			} else {
				me.removed_items.pop(me.name)
			}

			me.toggle_primary_action();
		});
	},

	bind_delete_event: function() {
		var me = this;

		$(this.wrapper).find('.btn-danger').click(function(){
			frappe.confirm(__("Delete permanently?"), function () {
				me.delete_records();
				me.render_list_customers();
			})
		})
	},

	set_focus: function () {
		if (this.default_customer || this.frm.doc.customer) {
			this.serach_item.$input.focus();
		} else {
			this.party_field.$input.focus();
		}
	},

	make_customer: function () {
		var me = this;

		$(frappe.render_template('customer_toolbar', {
			allow_delete: this.frm.doc.allow_delete
		})).insertAfter(this.page.$title_area.hide());

		this.party_field = frappe.ui.form.make_control({
			df: {
				"fieldtype": "Data",
				"options": this.party,
				"label": this.party,
				"fieldname": this.party.toLowerCase(),
				"placeholder": __("Select or add new customer")
			},
			parent: this.page.wrapper.find(".party-area"),
			only_input: true,
		});

		this.party_field.make_input();
		setTimeout(this.set_focus.bind(this), 500);

		if (this.default_customer && !this.frm.doc.customer) {
			this.party_field.$input.val(this.default_customer);
			this.frm.doc.customer = this.default_customer;
		}

		this.party_field.awesomeplete =
			new Awesomplete(this.party_field.$input.get(0), {
				minChars: 0,
				maxItems: 99,
				autoFirst: true,
				list: [],
				filter: function (item, input) {
					var value = item.value.toLowerCase();
					if (value.indexOf('is_action') !== -1 ||
						value.indexOf(input) !== -1) {
						return true;
					}
				},
				item: function (item, input) {
					var d = item;
					var html = "<span>" + __(d.label || d.value) + "</span>";
					return $('<li></li>')
						.data('item.autocomplete', d)
						.html('<a><p>' + html + '</p></a>')
						.get(0);
				}
			});
		var customers = this.customers.map(function (c) {
			return {
				label: c.name,
				value: c.name,
				customer_group: c.customer_group,
				territory: c.territory
			}
		});

		customers.push({
			label: "<span class='text-primary link-option'>"
			+ "<i class='fa fa-plus' style='margin-right: 5px;'></i> "
			+ __("Create a new Customer")
			+ "</span>",
			value: 'is_action',
			action: me.new_customer
		});
		this.party_field.awesomeplete.list = customers;

		this.party_field.$input
			.on('input', function (e) {
				me.party_field.awesomeplete.list = customers;
			})
			.on('awesomplete-select', function (e) {
				var customer = me.party_field.awesomeplete
					.get_item(e.originalEvent.text.value);
				if (!customer) return;
				// create customer link
				if (customer.action) {
					customer.action.apply(me);
					return;
				}
				me.update_customer_data(customer);
				me.refresh();
				me.set_focus();
			})
			.on('change', function (e) {
				if (!e.originalEvent.text) {
					me.frm.doc.customer = $(this).val();
				}
			})
			.on('focus', function (e) {
				$(e.target).val('').trigger('input');
			})
			.on("awesomplete-selectcomplete", function (e) {
				var item = me.party_field.awesomeplete
					.get_item(e.originalEvent.text.value);
				// clear text input if item is action
				if (item.action) {
					$(this).val("");
				}
			});
	},

	new_customer: function () {
		var me = this;
		if (!this.connection_status) return;

		this.customer_doc = new frappe.ui.Dialog({
			'title': 'Customer',
			fields: [
				{
					"label": __("Full Name"),
					"fieldname": "full_name",
					"fieldtype": "Data",
					"reqd": 1
				},
				{
					"fieldtype": "Section Break"
				},
				{
					"label": __("Email Id"),
					"fieldname": "email_id",
					"fieldtype": "Data"
				},
				{
					"fieldtype": "Column Break"
				},
				{
					"label": __("Contact Number"),
					"fieldname": "contact_no",
					"fieldtype": "Data"
				},
				{
					"fieldtype": "Section Break"
				},
				{
					"label": __("Address Line 1"),
					"fieldname": "address_line1",
					"fieldtype": "Data"
				},
				{
					"label": __("Address Line 2"),
					"fieldname": "address_line2",
					"fieldtype": "Data"
				},
				{
					"fieldtype": "Column Break"
				},
				{
					"label": __("City"),
					"fieldname": "city",
					"fieldtype": "Data"
				},
				{
					"label": __("State"),
					"fieldname": "state",
					"fieldtype": "Data"
				},
				{
					"label": __("ZIP Code"),
					"fieldname": "zip_code",
					"fieldtype": "Data"
				}
			]
		})

		this.customer_doc.show()

		this.customer_doc.set_primary_action(__("Save"), function () {
			me.make_offline_customer();
			me.pos_bill.show();
		});
	},

	make_offline_customer: function() {
		this.frm.doc.customer = this.customer_doc.get_values().full_name;
		this.frm.doc.contact_details = JSON.stringify(this.customer_doc.get_values());
		this.party_field.$input.val(this.frm.doc.customer);
		this.customers.push({
			name: this.frm.doc.customer,
			customer_name: this.frm.doc.customer
		});

		this.customer_doc.hide()
	},

	update_customer_data: function (doc) {
		var me = this;
		this.frm.doc.customer = doc.label || doc.name;
		this.frm.doc.customer_name = doc.customer_name;
		this.frm.doc.customer_group = doc.customer_group;
		this.frm.doc.territory = doc.territory;
		this.pos_bill.show();
		this.numeric_keypad.show();
	},

	get_customers: function (key) {
		var me = this;
		key = key.toLowerCase().trim()
		var re = new RegExp('%', 'g');
		var reg = new RegExp(key.replace(re, '\\w*\\s*[a-zA-Z0-9]*'))

		if (key) {
			return $.grep(this.customers, function (data) {
				if (reg.test(data.name.toLowerCase())
					|| reg.test(data.customer_name.toLowerCase())
					|| (data.customer_group && reg.test(data.customer_group.toLowerCase()))) {
					return data
				}
			})
		} else {
			customers = this.customers.sort(function (a, b) { return a.idx < b.idx })
			return customers.slice(0, 20)
		}
	},

	make_item_list: function () {
		var me = this;
		if (!this.price_list) {
			msgprint(__("Price List not found or disabled"));
			return;
		}

		me.item_timeout = null;

		var $wrap = me.wrapper.find(".item-list");
		me.wrapper.find(".item-list").empty();

		if (this.items.length > 0) {
			$.each(this.items, function(index, obj) {
				if(index < me.page_len) {
					$(frappe.render_template("pos_item", {
						item_code: obj.name,
						item_price: format_currency(me.price_list_data[obj.name], me.frm.doc.currency),
						item_name: obj.name === obj.item_name ? "" : obj.item_name,
						item_image: obj.image,
						color: frappe.get_palette(obj.item_name),
						abbr: frappe.get_abbr(obj.item_name)
					})).tooltip().appendTo($wrap);
				}
			});
		} else {
			$("<p class='text-muted small' style='padding-left: 10px'>"
				+__("Not items found")+"</p>").appendTo($wrap)
		}

		if (this.items.length == 1
			&& this.serach_item.$input.val()) {
			this.serach_item.$input.val("");
			this.add_to_cart();
		}

		// if form is local then allow this function
		$(me.wrapper).on("click", ".pos-item-wrapper", function () {
			if(me.list_customers_btn.hasClass("view_customer")) return;

			me.customer_validate();
			if (me.frm.doc.docstatus == 0) {
				me.items = me.get_items($(this).attr("data-item-code"))
				me.add_to_cart();
			}
		});
	},

	get_items: function (item_code) {
		// To search item as per the key enter

		var me = this;
		this.item_serial_no = {};
		this.item_batch_no = {};

		if (item_code) {
			return $.grep(this.item_data, function (item) {
				if (item.item_code == item_code) {
					return true
				}
			})
		}

		this.items_list = this.apply_category();

		key = this.serach_item.$input.val().toLowerCase().replace(/[&\/\\#,+()\[\]$~.'":*?<>{}]/g, '\\$&');
		var re = new RegExp('%', 'g');
		var reg = new RegExp(key.replace(re, '[\\w*\\s*[a-zA-Z0-9]*]*'))
		search_status = true

		if (key) {
			return $.grep(this.items_list, function (item) {
				if (search_status) {
					if (in_list(me.batch_no_data[item.item_code], me.serach_item.$input.val())) {
						search_status = false;
						return me.item_batch_no[item.item_code] = me.serach_item.$input.val()
					} else if (me.serial_no_data[item.item_code]
						&& in_list(Object.keys(me.serial_no_data[item.item_code]), me.serach_item.$input.val())) {
						search_status = false;
						me.item_serial_no[item.item_code] = [me.serach_item.$input.val(), me.serial_no_data[item.item_code][me.serach_item.$input.val()]]
						return true
					} else if (item.barcode == me.serach_item.$input.val()) {
						search_status = false;
						return item.barcode == me.serach_item.$input.val();
					} else if (reg.test(item.item_code.toLowerCase()) || reg.test(item.description.toLowerCase()) ||
						reg.test(item.item_name.toLowerCase()) || reg.test(item.item_group.toLowerCase())) {
						return true
					}
				}
			})
		} else {
			return this.items_list;
		}
	},

	apply_category: function() {
		var me = this;
		category = this.search_item_group.$input.val();

		if(category == 'All Item Groups') {
			return this.item_data
		} else {
			return this.item_data.filter(function(element, index, array){
				return element.item_group == category;
			});
		}
	},
	
	bind_items_event: function() {
		var me = this;
		$(this.wrapper).on('click', '.pos-bill-item', function() {
			$(me.wrapper).find('.pos-bill-item').removeClass('active');
			$(this).addClass('active');
			me.numeric_val = "";
			me.numeric_id = ""
			me.item_code = $(this).attr("data-item-code");
			me.render_selected_item()
			me.bind_qty_event()
			me.update_rate()
			$(me.wrapper).find(".selected-item").scrollTop(1000);
		})
	},

	bind_qty_event: function () {
		var me = this;
		
		$(this.wrapper).on("change", ".pos-item-qty", function () {
			var item_code = $(this).parents(".pos-bill-item").attr("data-item-code");
			var qty = $(this).val();
			me.update_qty(item_code, qty)
		})

		$(this.wrapper).find("[data-action='increase-qty']").on("click", function () {
			var item_code = $(this).parents(".pos-bill-item").attr("data-item-code");
			var qty = flt($(this).parents(".pos-bill-item").find('.pos-item-qty').val()) + 1;
			me.update_qty(item_code, qty)
		})

		$(this.wrapper).find("[data-action='decrease-qty']").on("click", function () {
			var item_code = $(this).parents(".pos-bill-item").attr("data-item-code");
			var qty = flt($(this).parents(".pos-bill-item").find('.pos-item-qty').val()) - 1;
			me.update_qty(item_code, qty)
		})
		
		$(this.wrapper).on("change", ".pos-item-disc", function () {
			var item_code = $(this).parents(".pos-bill-item").attr("data-item-code");
			var discount = $(this).val();
			me.update_discount(item_code, discount)
		})
	},

	update_qty: function (item_code, qty) {
		var me = this;
		this.items = this.get_items(item_code);
		this.validate_serial_no()
		this.set_item_details(item_code, "qty", qty);
	},

	update_discount: function(item_code, discount) {
		var me = this;
		this.items = this.get_items(item_code);
		this.set_item_details(item_code, "discount_percentage", discount);
	},

	update_rate: function () {
		var me = this;
		$(this.wrapper).on("change", ".pos-item-price", function () {
			var item_code = $(this).parents(".pos-bill-item").attr("data-item-code");
			me.set_item_details(item_code, "rate", $(this).val());
		})
	},

	render_selected_item: function() {
		doc = this.get_child_item(this.item_code);
		$(this.wrapper).find('.selected-item').empty();
		if(doc.length) {
			this.selected_row = frappe.render_template("pos_selected_item", doc[0])
			$(this.wrapper).find('.selected-item').html(this.selected_row)
		}
	},
	
	get_child_item: function(item_code) {
		var me = this;
		return $.map(me.frm.doc.items, function(doc){
			if(doc.item_code == item_code) {
				return doc
			}
		})
	},

	render_selected_item: function() {
		doc = this.get_child_item(this.item_code);
		$(this.wrapper).find('.selected-item').empty();
		if(doc.length) {
			this.selected_row = frappe.render_template("pos_selected_item", doc[0])
			$(this.wrapper).find('.selected-item').html(this.selected_row)
		}
	},
	
	get_child_item: function(item_code) {
		var me = this;
		return $.map(me.frm.doc.items, function(doc){
			if(doc.item_code == item_code) {
				return doc
			}
		})
	},

	set_item_details: function (item_code, field, value) {
		var me = this;
		if (value < 0) {
			frappe.throw(__("Enter value must be positive"));
		}

		this.remove_item = []
		$.each(this.frm.doc["items"] || [], function (i, d) {
			if (d.item_code == item_code) {
				if (d.serial_no && field == 'qty') {
					me.validate_serial_no_qty(d, item_code, field, value)
				}

				d[field] = flt(value);
				d.amount = flt(d.rate) * flt(d.qty);
				if (d.qty == 0) {
					me.remove_item.push(d.idx)
				}
			}
		});

		if (field == 'qty') {
			this.remove_zero_qty_item();
		}

		this.update_paid_amount_status(false)
	},

	remove_zero_qty_item: function () {
		var me = this;
		idx = 0
		this.items = []
		idx = 0
		$.each(this.frm.doc["items"] || [], function (i, d) {
			if (!in_list(me.remove_item, d.idx)) {
				d.idx = idx;
				me.items.push(d);
				idx++;
			}
		});

		this.frm.doc["items"] = this.items;
	},

	make_discount_field: function () {
		var me = this;

		this.wrapper.find('input.discount-percentage').on("change", function () {
			me.frm.doc.additional_discount_percentage = flt($(this).val(), precision("additional_discount_percentage"));
			total = me.frm.doc.grand_total

			if (me.frm.doc.apply_discount_on == 'Net Total') {
				total = me.frm.doc.net_total
			}

			me.frm.doc.discount_amount = flt(total * flt(me.frm.doc.additional_discount_percentage) / 100, precision("discount_amount"));
			me.wrapper.find('input.discount-amount').val(me.frm.doc.discount_amount)
			me.refresh();
		});

		this.wrapper.find('input.discount-amount').on("change", function () {
			me.frm.doc.discount_amount = flt($(this).val(), precision("discount_amount"));
			me.frm.doc.additional_discount_percentage = 0.0;
			me.wrapper.find('input.discount-percentage').val(0);
			me.refresh();
		});
	},

	customer_validate: function () {
		var me = this;
		if (!this.frm.doc.customer) {
			frappe.throw(__("Please select customer"))
		}
	},

	add_to_cart: function () {
		var me = this;
		var caught = false;
		var no_of_items = me.wrapper.find(".pos-bill-item").length;

		this.customer_validate();
		this.mandatory_batch_no();
		this.validate_serial_no();
		this.validate_warehouse();

		if (no_of_items != 0) {
			$.each(this.frm.doc["items"] || [], function (i, d) {
				if (d.item_code == me.items[0].item_code) {
					caught = true;
					d.qty += 1;
					d.amount = flt(d.rate) * flt(d.qty);
					if (me.item_serial_no[d.item_code]) {
						d.serial_no += '\n' + me.item_serial_no[d.item_code][0]
						d.warehouse = me.item_serial_no[d.item_code][1]
					}

					if (me.item_batch_no.length) {
						d.batch_no = me.item_batch_no[d.item_code]
					}
				}
			});
		}

		// if item not found then add new item
		if (!caught)
			this.add_new_item_to_grid();

		this.update_paid_amount_status(false)
		this.wrapper.find(".item-cart").scrollTop(1000);
	},

	add_new_item_to_grid: function () {
		var me = this;
		this.child = frappe.model.add_child(this.frm.doc, this.frm.doc.doctype + " Item", "items");
		this.child.item_code = this.items[0].item_code;
		this.child.item_name = this.items[0].item_name;
		this.child.stock_uom = this.items[0].stock_uom;
		this.child.description = this.items[0].description;
		this.child.discount_percentage = 0.0;
		this.child.qty = 1;
		this.child.item_group = this.items[0].item_group;
		this.child.cost_center = this.pos_profile_data['cost_center'] || this.items[0].cost_center;
		this.child.income_account = this.pos_profile_data['income_account'] || this.items[0].income_account;
		this.child.warehouse = (this.item_serial_no[this.child.item_code]
			? this.item_serial_no[this.child.item_code][1] : (this.pos_profile_data['warehouse'] || this.items[0].default_warehouse));
		this.child.price_list_rate = flt(this.price_list_data[this.child.item_code], 9) / flt(this.frm.doc.conversion_rate, 9);
		this.child.rate = flt(this.price_list_data[this.child.item_code], 9) / flt(this.frm.doc.conversion_rate, 9);
		this.child.actual_qty = me.get_actual_qty(this.items[0]);
		this.child.amount = flt(this.child.qty) * flt(this.child.rate);
		this.child.batch_no = this.item_batch_no[this.child.item_code];
		this.child.serial_no = (this.item_serial_no[this.child.item_code]
			? this.item_serial_no[this.child.item_code][0] : '');
		this.child.item_tax_rate = JSON.stringify(this.tax_data[this.child.item_code]);
	},

	update_paid_amount_status: function (update_paid_amount) {
		if (this.name) {
			update_paid_amount = update_paid_amount ? false : true;
		}

		this.refresh(update_paid_amount);
	},

	refresh: function (update_paid_amount) {
		var me = this;
		this.refresh_fields(update_paid_amount);
		this.bind_items_event();
		this.set_primary_action();
	},

	refresh_fields: function (update_paid_amount) {
		this.apply_pricing_rule();
		this.discount_amount_applied = false;
		this._calculate_taxes_and_totals();
		this.calculate_discount_amount();
		this.show_items_in_item_cart();
		this.set_taxes();
		this.calculate_outstanding_amount(update_paid_amount);
		this.set_totals();
	},

	get_company_currency: function () {
		return erpnext.get_currency(this.frm.doc.company);
	},

	show_item_wise_taxes: function () {
		return null;
	},

	show_items_in_item_cart: function () {
		var me = this;
		var $items = this.wrapper.find(".items").empty();
		var $no_items_message = this.wrapper.find(".no-items-message");
		$no_items_message.toggle(this.frm.doc.items.length === 0);

		var $totals_area = this.wrapper.find('.totals-area');
		$totals_area.toggle(this.frm.doc.items.length > 0);

		$.each(this.frm.doc.items || [], function (i, d) {
			$(frappe.render_template("pos_bill_item_new", {
				item_code: d.item_code,
				item_name: (d.item_name === d.item_code || !d.item_name) ? "" : ("<br>" + d.item_name),
				qty: d.qty,
				discount_percentage: d.discount_percentage || 0.0,
				actual_qty: me.actual_qty_dict[d.item_code] || 0.0,
				projected_qty: d.projected_qty,
				rate: format_number(d.rate, me.frm.doc.currency),
				enabled: me.pos_profile_data["allow_user_to_edit_rate"] ? true : false,
				amount: format_currency(d.amount, me.frm.doc.currency)
			})).appendTo($items);
		});

		this.wrapper.find("input.pos-item-qty").on("focus", function () {
			$(this).select();
		});

		this.wrapper.find("input.pos-item-disc").on("focus", function () {
			$(this).select();
		});

		this.wrapper.find("input.pos-item-price").on("focus", function () {
			$(this).select();
		});
	},

	set_taxes: function () {
		var me = this;
		me.frm.doc.total_taxes_and_charges = 0.0

		var taxes = this.frm.doc.taxes || [];
		$(this.wrapper)
			.find(".tax-area").toggleClass("hide", (taxes && taxes.length) ? false : true)
			.find(".tax-table").empty();

		$.each(taxes, function (i, d) {
			if (d.tax_amount && cint(d.included_in_print_rate) == 0) {
				$(frappe.render_template("pos_tax_row", {
					description: d.description,
					tax_amount: format_currency(flt(d.tax_amount_after_discount_amount),
						me.frm.doc.currency)
				})).appendTo(me.wrapper.find(".tax-table"));
			}
		});
	},

	set_totals: function () {
		var me = this;
		this.wrapper.find(".net-total").text(format_currency(me.frm.doc.total, me.frm.doc.currency));
		this.wrapper.find(".grand-total").text(format_currency(me.frm.doc.grand_total, me.frm.doc.currency));
	},

	set_primary_action: function () {
		var me = this;

		if (this.frm.doc.docstatus == 0) {
			this.page.set_primary_action(__("Pay"), function () {
				me.validate();
				me.update_paid_amount_status(true);
				me.create_invoice();
				me.make_payment();
			}, "fa fa-credit-card");
		} else if (this.frm.doc.docstatus == 1) {
			this.page.set_primary_action(__("Print"), function () {
				html = frappe.render(me.print_template_data, me.frm.doc)
				me.print_document(html)
			})
		} else {
			this.page.clear_primary_action()
		}

		// this.page.set_secondary_action(__("New"), function () {
		// 	me.save_previous_entry();
		// 	me.create_new();
		// }, "fa fa-plus").addClass("btn-primary");
	},

	print_dialog: function () {
		var me = this;

		msgprint = frappe.msgprint(format('<a class="btn btn-primary print_doc" \
			style="margin-right: 5px;">{0}</a>\
			<a class="btn btn-default new_doc">{1}</a>', [
				__('Print'), __('New')
			]));

		$('.print_doc').click(function () {
			html = frappe.render(me.print_template_data, me.frm.doc)
			me.print_document(html)
		})

		$('.new_doc').click(function () {
			msgprint.hide()
			me.create_new();
		})
	},

	print_document: function (html) {
		var w = window.open();
		w.document.write(html);
		w.document.close();
		setTimeout(function () {
			w.print();
			w.close();
		}, 1000)
	},

	submit_invoice: function () {
		var me = this;
		this.change_status();
		if (this.frm.doc.docstatus == 1) {
			this.print_dialog()
		}
	},

	change_status: function () {
		if (this.frm.doc.docstatus == 0) {
			this.frm.doc.docstatus = 1;
			this.update_invoice();
			this.disable_input_field();
		}
	},

	disable_input_field: function () {
		var pointer_events = 'inherit'
		$(this.wrapper).find('input').attr("disabled", false);
		$(this.wrapper).find('select').attr("disabled", false);

		if (this.frm.doc.docstatus == 1) {
			pointer_events = 'none';
			$(this.wrapper).find('input').attr("disabled", true);
			$(this.wrapper).find('select').attr("disabled", true);
		}

		$(this.wrapper).find('.pos-bill').css('pointer-events', pointer_events);
		$(this.wrapper).find('.pos-items-section').css('pointer-events', pointer_events);
		this.set_primary_action();
	},

	create_invoice: function () {
		var me = this;
		var invoice_data = {}
		this.si_docs = this.get_doc_from_localstorage();
		if (this.name) {
			this.update_invoice()
		} else {
			this.name = $.now();
			this.frm.doc.offline_pos_name = this.name;
			this.frm.doc.posting_date = frappe.datetime.get_today();
			this.frm.doc.posting_time = frappe.datetime.now_time();
			invoice_data[this.name] = this.frm.doc
			this.si_docs.push(invoice_data)
			this.update_localstorage();
			this.set_primary_action();
		}
		return invoice_data;
	},

	update_invoice: function () {
		var me = this;
		this.si_docs = this.get_doc_from_localstorage();
		$.each(this.si_docs, function (index, data) {
			for (key in data) {
				if (key == me.name) {
					me.si_docs[index][key] = me.frm.doc;
					me.update_localstorage();
				}
			}
		})
	},

	update_localstorage: function () {
		try {
			localStorage.setItem('sales_invoice_doc', JSON.stringify(this.si_docs));
		} catch (e) {
			frappe.throw(__("LocalStorage is full , did not save"))
		}
	},

	get_doc_from_localstorage: function () {
		try {
			return JSON.parse(localStorage.getItem('sales_invoice_doc')) || [];
		} catch (e) {
			return []
		}
	},

	set_interval_for_si_sync: function () {
		var me = this;
		setInterval(function () {
			me.sync_sales_invoice()
		}, 60000)
	},

	sync_sales_invoice: function () {
		var me = this;
		this.si_docs = this.get_submitted_invoice() || [];
		this.email_queue_list = this.get_email_queue() || {};

		if (this.si_docs.length || this.email_queue_list) {
			frappe.call({
				method: "erpnext.accounts.doctype.sales_invoice.pos.make_invoice",
				args: {
					doc_list: me.si_docs,
					email_queue_list: me.email_queue_list
				},
				callback: function (r) {
					if (r.message) {
						me.removed_items = r.message.invoice;
						me.removed_email = r.message.email_queue
						me.remove_doc_from_localstorage();
						me.remove_email_queue_from_localstorage();
					}
				}
			})
		}
	},

	get_submitted_invoice: function () {
		var invoices = [];
		var index = 1;
		docs = this.get_doc_from_localstorage();
		if (docs) {
			invoices = $.map(docs, function (data) {
				for (key in data) {
					if (data[key].docstatus == 1 && index < 50) {
						index++
						data[key].docstatus = 0;
						return data
					}
				}
			});
		}

		return invoices
	},

	remove_doc_from_localstorage: function () {
		var me = this;
		this.si_docs = this.get_doc_from_localstorage();
		this.new_si_docs = [];
		if (this.removed_email) {
			$.each(this.si_docs, function (index, data) {
				for (key in data) {
					if (!in_list(me.removed_email, key)) {
						me.new_si_docs.push(data);
					}
				}
			})
			this.si_docs = this.new_si_docs;
			this.update_localstorage();
		}
	},

	remove_email_queue_from_localstorage: function() {
		var me = this;
		this.email_queue = this.get_email_queue()
		if (this.removed_email) {
			$.each(this.email_queue_list, function (index, data) {
				if (in_list(me.removed_email, index)) {
					delete me.email_queue[index]
				}
			})
			this.update_email_queue();
		}
	},

	validate: function () {
		var me = this;
		this.customer_validate();
		this.item_validate();
		this.validate_mode_of_payments();
	},

	item_validate: function () {
		if (this.frm.doc.items.length == 0) {
			frappe.throw(__("Select items to save the invoice"))
		}
	},

	validate_mode_of_payments: function () {
		if (this.frm.doc.payments.length === 0) {
			frappe.throw(__("Payment Mode is not configured. Please check, whether account has been set on Mode of Payments or on POS Profile."))
		}
	},

	validate_serial_no: function () {
		var me = this;
		var item_code = serial_no = '';
		for (key in this.item_serial_no) {
			item_code = key;
			serial_no = me.item_serial_no[key][0];
		}

		if (this.items[0].has_serial_no && serial_no == "") {
			this.refresh();
			frappe.throw(__(repl("Error: Serial no is mandatory for item %(item)s", {
				'item': this.items[0].item_code
			})))
		}

		if (item_code && serial_no) {
			$.each(this.frm.doc.items, function (index, data) {
				if (data.item_code == item_code) {
					if (in_list(data.serial_no.split('\n'), serial_no)) {
						frappe.throw(__(repl("Serial no %(serial_no)s is already taken", {
							'serial_no': serial_no
						})))
					}
				}
			})
		}
	},

	validate_serial_no_qty: function (args, item_code, field, value) {
		var me = this;
		if (args.item_code == item_code && args.serial_no
			&& field == 'qty' && cint(value) != value) {
			args.qty = 0.0;
			this.refresh();
			frappe.throw(__("Serial no item cannot be a fraction"))
		}

		if (args.item_code == item_code && args.serial_no && args.serial_no.split('\n').length != cint(value)) {
			args.qty = 0.0;
			args.serial_no = ''
			this.refresh();
			frappe.throw(__(repl("Total nos of serial no is not equal to quantity for item %(item)s.", {
				'item': item_code
			})))
		}
	},

	mandatory_batch_no: function () {
		var me = this;
		if (this.items[0].has_batch_no && !this.item_batch_no[this.items[0].item_code]) {
			frappe.throw(__(repl("Error: Batch no is mandatory for item %(item)s", {
				'item': this.items[0].item_code
			})))
		}
	},

	apply_pricing_rule: function () {
		var me = this;
		$.each(this.frm.doc["items"], function (n, item) {
			pricing_rule = me.get_pricing_rule(item)
			me.validate_pricing_rule(pricing_rule)
			if (pricing_rule.length) {
				item.pricing_rule = pricing_rule[0].name;
				item.margin_type = pricing_rule[0].margin_type;
				item.price_list_rate = pricing_rule[0].price || item.price_list_rate;
				item.margin_rate_or_amount = pricing_rule[0].margin_rate_or_amount;
				item.discount_percentage = pricing_rule[0].discount_percentage || 0.0;
				me.apply_pricing_rule_on_item(item)
			} else if (item.pricing_rule) {
				item.price_list_rate = me.price_list_data[item.item_code]
				item.margin_rate_or_amount = 0.0;
				item.discount_percentage = 0.0;
				item.pricing_rule = null;
				me.apply_pricing_rule_on_item(item)
			}
			
			if(item.discount_percentage > 0) {
				me.apply_pricing_rule_on_item(item)
			}
		})
	},

	get_pricing_rule: function (item) {
		var me = this;
		return $.grep(this.pricing_rules, function (data) {
			if (item.qty >= data.min_qty && (item.qty <= (data.max_qty ? data.max_qty : item.qty))) {
				if (data.item_code == item.item_code || in_list(['All Item Groups', item.item_group], data.item_group)) {
					if (in_list(['Customer', 'Customer Group', 'Territory', 'Campaign'], data.applicable_for)) {
						return me.validate_condition(data)
					} else {
						return true
					}
				}
			}
		})
	},

	validate_condition: function (data) {
		//This method check condition based on applicable for
		condition = this.get_mapper_for_pricing_rule(data)[data.applicable_for]
		if (in_list(condition[1], condition[0])) {
			return true
		}
	},

	get_mapper_for_pricing_rule: function (data) {
		return {
			'Customer': [data.customer, [this.frm.doc.customer]],
			'Customer Group': [data.customer_group, [this.frm.doc.customer_group, 'All Customer Groups']],
			'Territory': [data.territory, [this.frm.doc.territory, 'All Territories']],
			'Campaign': [data.campaign, [this.frm.doc.campaign]],
		}
	},

	validate_pricing_rule: function (pricing_rule) {
		//This method validate duplicate pricing rule
		var pricing_rule_name = '';
		var priority = 0;
		var pricing_rule_list = [];
		var priority_list = []

		if (pricing_rule.length > 1) {

			$.each(pricing_rule, function (index, data) {
				pricing_rule_name += data.name + ','
				priority_list.push(data.priority)
				if (priority <= data.priority) {
					priority = data.priority
					pricing_rule_list.push(data)
				}
			})

			count = 0
			$.each(priority_list, function (index, value) {
				if (value == priority) {
					count++
				}
			})

			if (priority == 0 || count > 1) {
				frappe.throw(__(repl("Multiple Price Rules exists with same criteria, please resolve conflict by assigning priority. Price Rules: %(pricing_rule)s", {
					'pricing_rule': pricing_rule_name
				})))
			}

			return pricing_rule_list
		}
	},

	validate_warehouse: function () {
		if (this.items[0].is_stock_item && !this.items[0].default_warehouse && !this.pos_profile_data['warehouse']) {
			frappe.throw(__("Default warehouse is required for selected item"))
		}
	},

	get_actual_qty: function (item) {
		this.actual_qty = 0.0;

		var warehouse = this.pos_profile_data['warehouse'] || item.default_warehouse;
		if (warehouse && this.bin_data[item.item_code]) {
			this.actual_qty = this.bin_data[item.item_code][warehouse] || 0;
			this.actual_qty_dict[item.item_code] = this.actual_qty
		}

		return this.actual_qty
	}
})