// Cuenta el número de pedidos y las cantidades solicitadas por cada cliente, así como cuál es su pedido promedio
//
// CONSTANTS

const ORIGIN_TABLE_NAME = "Abarax España";
const ORIGIN_VIEW_NAME = "Default";

const RESULT_TABLE_NAME = "Clientes"
const RESULT_VIEW_NAME = "Default";

const originClientColumnName = "Cliente";
const originQuantityColumnName = "Cantidad";

const resultClientColumnName = "Cliente";
const resultCountColumnName = "Pedidos";
const resultQuantityColumnName = "Cantidad";

const originTable = base.getTableByName(ORIGIN_TABLE_NAME);
const originView = base.getViewByName(originTable, ORIGIN_VIEW_NAME);
const resultTable = base.getTableByName(RESULT_TABLE_NAME);
const resultView = base.getViewByName(resultTable, RESULT_VIEW_NAME);

// Object to save every reocurring item and its count
const elements = {};

// Get all items in Origin table
const originRows = base.getRows(originTable, originView);

// Fill elements with every item, count and quantity
originRows.forEach(row => {

	const clientName = row[originClientColumnName];
	const quantity = Math.abs(row[originQuantityColumnName]);
	const element = { "count": 0, "quantity": 0 };

	if (elements[clientName]) {
		element.count = elements[clientName].count;
		element.quantity = elements[clientName].quantity;
		element["count"] += 1;
		element["quantity"] += quantity;
		elements[clientName]["count"] = element.count;
		elements[clientName]["quantity"] = element.quantity;
	} else {

		elements[clientName] = {};
		elements[clientName].count = 1
		elements[clientName].quantity = quantity;
	}
});

// Create array of arrays from object 'elements'
clientsList = Object.entries(elements);

// If Table is not empty, delete all rows
const resultRows = base.getRows(resultTable, resultView);
if (resultRows.length > 0) {
	const row_ids = resultRows.map(row => row._id);
	row_ids.map(row_id => base.deleteRowById(resultTable, row_id));
}

// Add new rows
clientsList.forEach((client) => {

	clientData = {
		[resultClientColumnName]: client[0],
		[resultCountColumnName]: client[1].count,
		[resultQuantityColumnName]: client[1].quantity
	};
	base.addRow(resultTable, clientData);

});