import { SlickDataView } from "slickgrid";

import { formatNumber } from "shared/lib/format";
import { ISlickTable } from "shared/model/types";

import { ITotal } from "../../model";

export function getTotals(table: ISlickTable | undefined): ITotal {
	const result: ITotal = {};
	if (!table) return result;
	const ids = table.summaryColumnIds;
	const grid = table.grid;
	if (!grid) return result;
	const selectedRows = grid.getSelectedRows();
	const columns = grid.getColumns();
	columns.forEach((column, index) => {
		const { formatter, id, name } = column;
		if (ids.includes(id as string)) {
			result[id] = {
				cell: index,
				column,
				formatter,
				label: name as string,
				total: 0,
				totalFormatted: formatter ? formatter(0, 0, 0, column, {}, grid) : "0",
			};
		}
	});
	const dataView: SlickDataView = grid.getData();
	selectedRows.forEach((rowNumber) => {
		const item = dataView.getItem(rowNumber);
		Object.keys(result).forEach((id) => {
			result[id].total += item[id];
			result[id].totalFormatted = result[id].formatter
				? result[id].formatter(
						rowNumber,
						result[id].cell,
						result[id].total,
						result[id].column,
						item,
						grid,
					)
				: `${formatNumber(result[id].total)}`;
		});
	});
	return result;
}