// Copyright (c) 2013, Web Notes Technologies Pvt. Ltd. and Contributors
// License: GNU General Public License v3. See license.txt

erpnext.POS = Class.extend({
	init: function(wrapper, frm) {
		this.wrapper = wrapper;
		this.frm = frm;
		this.wrapper.html(frappe.render_template("pos", {}));

		this.check_transaction_type();
		this.make();

		var me = this;
		$(this.frm.wrapper).on("refresh-fields", function() {
			me.refresh();
		});

		this.wrapper.find('input.discount-amount').on("change", function() {
			frappe.model.set_value(me.frm.doctype, me.frm.docname, "discount_amount", this.value);
		});

		this.call_function("remove-items", function() {me.remove_selected_items();});
		this.call_function("make-payment", function() {me.make_payment();});
	},
	check_transaction_type: function() {
		var me = this;

		// Check whether the transaction is "Sales" or "Purchase"
		if (frappe.meta.has_field(cur_frm.doc.doctype, "customer")) {
			this.set_transaction_defaults("Customer", "export");
		}
		else if (frappe.meta.has_field(cur_frm.doc.doctype, "supplier")) {
			this.set_transaction_defaults("Supplier", "import");
		}
	},
	set_transaction_defaults: function(party, export_or_import) {
		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");
		this.net_total = "net_total_" + export_or_import;
		this.grand_total = "grand_total_" + export_or_import;
		// this.amount = export_or_import + "_amount";
		// this.rate = export_or_import + "_rate";
	},
	call_function: function(class_name, fn, event_name) {
		this.wrapper.find("." + class_name).on(event_name || "click", fn);
	},
	make: function() {
		this.make_party();
		this.make_barcode();
		this.make_search();
		this.make_item_group();
		this.make_item_list();
	},
	make_party: function() {
		var me = this;
		this.party_field = frappe.ui.form.make_control({
			df: {
				"fieldtype": "Link",
				"options": this.party,
				"label": this.party,
				"fieldname": "pos_party",
				"placeholder": this.party
			},
			parent: this.wrapper.find(".party-area"),
			only_input: true,
		});
		this.party_field.make_input();
		this.party_field.$input.on("change", function() {
			if(!me.party_field.autocomplete_open)
				frappe.model.set_value(me.frm.doctype, me.frm.docname,
					me.party.toLowerCase(), this.value);
		});
	},
	make_barcode: function() {
		var me = this;
		this.barcode = frappe.ui.form.make_control({
			df: {
				"fieldtype": "Data",
				"label": "Barcode",
				"fieldname": "pos_barcode",
				"placeholder": "Barcode / Serial No"
			},
			parent: this.wrapper.find(".barcode-area"),
			only_input: true,
		});
		this.barcode.make_input();
		this.barcode.$input.on("keypress", function() {
			if(me.barcode_timeout)
				clearTimeout(me.barcode_timeout);
			me.barcode_timeout = setTimeout(function() { me.add_item_thru_barcode(); }, 1000);
		});
	},
	make_search: function() {
		var me = this;
		this.search = frappe.ui.form.make_control({
			df: {
				"fieldtype": "Data",
				"label": "Item",
				"fieldname": "pos_item",
				"placeholder": "Search Item"
			},
			parent: this.wrapper.find(".search-area"),
			only_input: true,
		});
		this.search.make_input();
		this.search.$input.on("keypress", function() {
			if(!me.search.autocomplete_open)
				if(me.item_timeout)
					clearTimeout(me.item_timeout);
				me.item_timeout = setTimeout(function() { me.make_item_list(); }, 1000);
		});
	},
	make_item_group: function() {
		var me = this;
		this.item_group = frappe.ui.form.make_control({
			df: {
				"fieldtype": "Link",
				"options": "Item Group",
				"label": "Item Group",
				"fieldname": "pos_item_group",
				"placeholder": "Item Group"
			},
			parent: this.wrapper.find(".item-group-area"),
			only_input: true,
		});
		this.item_group.make_input();
		this.item_group.$input.on("change", function() {
			if(!me.item_group.autocomplete_open)
				me.make_item_list();
		});
	},
	make_item_list: function() {
		var me = this;
		if(!this.price_list) {
			msgprint(__("Price List not found or disabled"));
			return;
		}

		me.item_timeout = null;
		frappe.call({
			method: 'erpnext.accounts.doctype.sales_invoice.pos.get_items',
			args: {
				sales_or_purchase: this.sales_or_purchase,
				price_list: this.price_list,
				item_group: this.item_group.$input.val(),
				item: this.search.$input.val()
			},
			callback: function(r) {
				var $wrap = me.wrapper.find(".item-list");
				me.wrapper.find(".item-list").empty();
				if (r.message) {
					$.each(r.message, function(index, obj) {
						if (obj.image)
							image = '<img src="' + obj.image + '" class="img-responsive" \
									style="border:1px solid #eee; max-height: 140px;">';
						else
							image = '<div class="missing-image"><i class="octicon octicon-circle-slash"></i></div>';

						$(repl('<div class="col-xs-3 pos-item" data-item_code="%(item_code)s">\
									<div style="height: 140px; overflow: hidden;">%(item_image)s</div>\
									<div class="small">%(item_code)s</div>\
									<div class="small">%(item_name)s</div>\
									<div class="small">%(item_price)s</div>\
								</div>',
							{
								item_code: obj.name,
								item_price: format_currency(obj.price_list_rate, obj.currency),
								item_name: obj.name===obj.item_name ? "" : obj.item_name,
								item_image: image
							})).appendTo($wrap);
					});
				}

				// if form is local then allow this function
				$(me.wrapper).find("div.pos-item").on("click", function() {
					if(me.frm.doc.docstatus==0) {
						console.log($(this).attr("data-item_code"));
						me.add_to_cart($(this).attr("data-item_code"));
					}
				});
			}
		});
	},
	add_to_cart: function(item_code, serial_no) {
		var me = this;
		var caught = false;

		if(!me.frm.doc[me.party.toLowerCase()] && ((me.frm.doctype == "Quotation" &&
				me.frm.doc.quotation_to == "Customer")
				|| me.frm.doctype != "Quotation")) {
			msgprint(__("Please select {0} first.", [me.party]));
			return;
		}

		// get no_of_items
		var no_of_items = me.wrapper.find(".pos-bill-item").length;

		// check whether the item is already added
		if (no_of_items != 0) {
			$.each(this.frm.doc["items"] || [], function(i, d) {
				if (d.item_code == item_code) {
					caught = true;
					if (serial_no)
						frappe.model.set_value(d.doctype, d.name, "serial_no", d.serial_no + '\n' + serial_no);
					else
						frappe.model.set_value(d.doctype, d.name, "qty", d.qty + 1);
				}
			});
		}

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

		this.refresh();
		this.refresh_search_box();
	},
	add_new_item_to_grid: function(item_code, serial_no) {
		var me = this;

		var child = frappe.model.add_child(me.frm.doc, this.frm.doctype + " Item", "items");
		child.item_code = item_code;

		if (serial_no)
			child.serial_no = serial_no;

		this.frm.script_manager.trigger("item_code", child.doctype, child.name);
	},
	refresh_search_box: function() {
		var me = this;

		// Clear Item Box and remake item list
		if (this.search.$input.val()) {
			this.search.set_input("");
			this.make_item_list();
		}
	},
	update_qty: function(item_code, qty) {
		console.log([item_code, qty]);
		var me = this;
		$.each(this.frm.doc["items"] || [], function(i, d) {
			if (d.item_code == item_code) {
				if (qty == 0) {
					frappe.model.clear_doc(d.doctype, d.name);
					me.refresh_grid();
				} else {
					frappe.model.set_value(d.doctype, d.name, "qty", qty);
				}
			}
		});
		this.refresh();
	},
	refresh: function() {
		var me = this;

		this.refresh_item_list();
		this.party_field.set_input(this.frm.doc[this.party.toLowerCase()]);
		this.wrapper.find('input.discount-amount').val(this.frm.doc.discount_amount);
		this.barcode.set_input("");

		this.show_items_in_item_cart();
		this.show_taxes();
		this.set_totals();

		// if form is local then only run all these functions
		if (this.frm.doc.docstatus===0) {
			this.call_when_local();
		}

		this.disable_text_box_and_button();
		this.hide_payment_button();

		// If quotation to is not Customer then remove party
		if (this.frm.doctype == "Quotation" && this.frm.doc.quotation_to!="Customer") {
			this.party_field.$input.prop("disabled", true);
		}
	},
	refresh_item_list: function() {
		var me = this;
		// refresh item list on change of price list
		if (this.frm.doc[this.price_list_field] != this.price_list) {
			this.price_list = this.frm.doc[this.price_list_field];
			this.make_item_list();
		}
	},
	show_items_in_item_cart: function() {
		var me = this;
		var $items = this.wrapper.find(".items").empty();

		$.each(this.frm.doc.items|| [], function(i, d) {
			$(frappe.render_template("pos_bill_item", {
				item_code: d.item_code,
				item_name: d.item_name===d.item_code ? "" : ("<br>" + d.item_name),
				qty: d.qty,
				actual_qty: d.actual_qty,
				rate: format_currency(d.rate, me.frm.doc.currency),
				amount: format_currency(d.amount, me.frm.doc.currency)
			})).appendTo($items);
		});

		this.wrapper.find("input.pos-item-qty").on("focus", function() {
			$(this).select();
		});
	},
	show_taxes: function() {
		var me = this;
		var taxes = this.frm.doc["taxes"] || [];
		$(this.wrapper).find(".tax-table")
			.toggle((taxes && taxes.length) ? true : false)
			.find("tbody").empty();

		$.each(taxes, function(i, d) {
			if (d.tax_amount) {
				$(repl('<tr>\
					<td>%(description)s %(rate)s</td>\
					<td style="text-align: right;">%(tax_amount)s</td>\
				<tr>', {
					description: d.description,
					rate: ((d.charge_type == "Actual") ? '' : ("(" + d.rate + "%)")),
					tax_amount: format_currency(flt(d.tax_amount)/flt(me.frm.doc.conversion_rate),
						me.frm.doc.currency)
				})).appendTo(".tax-table tbody");
			}
		});
	},
	set_totals: function() {
		var me = this;
		this.wrapper.find(".net-total").text(format_currency(this.frm.doc[this.net_total],
			me.frm.doc.currency));
		this.wrapper.find(".grand-total").text(format_currency(this.frm.doc[this.grand_total],
			me.frm.doc.currency));

		$(".paid-amount-area").toggle(!!this.frm.doc.paid_amount);
		if(this.frm.doc.paid_amount) {
			this.wrapper.find(".paid-amount").text(format_currency(this.frm.doc.paid_amount,
				me.frm.doc.currency));
		}
	},
	call_when_local: function() {
		var me = this;

		// append quantity to the respective item after change from input box
		$(this.wrapper).find("input.pos-item-qty").on("change", function() {
			var item_code = $(this).closest("tr").attr("id");
			me.update_qty(item_code, $(this).val());
		});

		// increase/decrease qty on plus/minus button
		$(this.wrapper).find(".pos-qty-btn").on("click", function() {
			var $item = $(this).parents(".pos-bill-item:first");
			me.increase_decrease_qty($item, $(this).attr("data-action"));
		});

		// on td click toggle the highlighting of row
		$(this.wrapper).find("#cart tbody tr td").on("click", function() {
			var row = $(this).closest("tr");
			if (row.attr("data-selected") == "false") {
				row.attr("class", "warning");
				row.attr("data-selected", "true");
			}
			else {
				row.prop("class", null);
				row.attr("data-selected", "false");
			}
			me.refresh_delete_btn();
		});

		me.refresh_delete_btn();
		//me.focus();
	},
	focus: function() {
		if(me.frm.doc[this.party].toLowerCase()) {
			this.barcode.$input.focus();
		} else {
			if(!(this.frm.doctype == "Quotation" && this.frm.doc.quotation_to!="Customer"))
				this.party_field.$input.focus();
		}
	},
	increase_decrease_qty: function($item, operation) {
		var item_code = $item.attr("data-item-code");
		var item_qty = cint($item.find("input.pos-item-qty").val());

		if (operation == "increase-qty")
			this.update_qty(item_code, item_qty + 1);
		else if (operation == "decrease-qty" && item_qty != 0)
			this.update_qty(item_code, item_qty - 1);
	},
	disable_text_box_and_button: function() {
		var me = this;
		// if form is submitted & cancelled then disable all input box & buttons
		$(this.wrapper)
			.find(".remove-items, .make-payment, .pos-qty-btn")
			.toggle(this.frm.doc.docstatus===0);

		$(this.wrapper).find('input, button').prop("disabled", !(this.frm.doc.docstatus===0));
	},
	hide_payment_button: function() {
		$(this.wrapper)
			.find(".make-payment")
			.toggle(this.frm.doctype == "Sales Invoice" && this.frm.doc.is_pos);
	},
	refresh_delete_btn: function() {
		$(this.wrapper).find(".remove-items").toggle($(".item-cart .warning").length ? true : false);
	},
	add_item_thru_barcode: function() {
		var me = this;
		me.barcode_timeout = null;
		frappe.call({
			method: 'erpnext.accounts.doctype.sales_invoice.pos.get_item_code',
			args: {barcode_serial_no: this.barcode.$input.val()},
			callback: function(r) {
				if (r.message) {
					if (r.message[1] == "serial_no")
						me.add_to_cart(r.message[0][0].item_code, r.message[0][0].name);
					else
						me.add_to_cart(r.message[0][0].name);
				}
				else
					msgprint(__("Invalid Barcode"));

				me.refresh();
			}
		});
	},
	remove_selected_items: function() {
		var me = this;
		var selected_items = [];
		var no_of_items = $(this.wrapper).find("#cart tbody tr").length;
		for(var x=0; x<=no_of_items - 1; x++) {
			var row = $(this.wrapper).find("#cart tbody tr:eq(" + x + ")");
			if(row.attr("data-selected") == "true") {
				selected_items.push(row.attr("id"));
			}
		}

		var child = this.frm.doc["items"] || [];

		$.each(child, function(i, d) {
			for (var i in selected_items) {
				if (d.item_code == selected_items[i]) {
					frappe.model.clear_doc(d.doctype, d.name);
				}
			}
		});

		this.refresh_grid();
	},
	refresh_grid: function() {
		this.frm.dirty();
		this.frm.fields_dict["items"].grid.refresh();
		this.frm.script_manager.trigger("calculate_taxes_and_totals");
		this.refresh();
	},
	make_payment: function() {
		var me = this;
		var no_of_items = $(this.wrapper).find("#cart tbody tr").length;
		var mode_of_payment = [];

		if (no_of_items == 0)
			msgprint(__("Payment cannot be made for empty cart"));
		else {
			frappe.call({
				method: 'erpnext.accounts.doctype.sales_invoice.pos.get_mode_of_payment',
				callback: function(r) {
					if(!r.message) {
						msgprint(__("Please add to Modes of Payment from Setup."))
						return;
					}
					for (x=0; x<=r.message.length - 1; x++) {
						mode_of_payment.push(r.message[x].name);
					}

					// show payment wizard
					var dialog = new frappe.ui.Dialog({
						width: 400,
						title: 'Payment',
						fields: [
							{fieldtype:'Data', fieldname:'total_amount', label:'Total Amount', read_only:1},
							{fieldtype:'Select', fieldname:'mode_of_payment', label:'Mode of Payment',
								options:mode_of_payment.join('\n'), reqd: 1},
							{fieldtype:'Button', fieldname:'pay', label:'Pay'}
						]
					});
					dialog.set_values({
						"total_amount": $(".grand-total").text()
					});
					dialog.show();
					dialog.get_input("total_amount").prop("disabled", true);

					dialog.fields_dict.pay.input.onclick = function() {
						me.frm.set_value("mode_of_payment", dialog.get_values().mode_of_payment);
						me.frm.set_value("paid_amount", dialog.get_values().total_amount);
						me.frm.cscript.mode_of_payment(me.frm.doc);
						me.frm.save();
						dialog.hide();
						me.refresh();
					};
				}
			});
		}
	},
});