/*
    Society Self-Service
    Copyright © 2018-2019  Yingtong Li (RunasSudo)

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/

function recalcTotal(args) {
	var total = 0;
	var gst = 0;
	for (var row of args.grid.data) {
		total += row['Unit price\n(incl GST)'] * row['Units'];
		if (!row['GST-free']) {
			gst += (row['Unit price\n(incl GST)'] * row['Units']) / 11;
		}
	}
	
	$(args.grid._body).find('.totalrow').remove();
	
	var totalrow = $('<tr class="jsgrid-row totalrow" style="font-style: italic;"></tr>');
	totalrow.append($('<td class="jsgrid-cell">Includes GST of:</td>').prop('colspan', args.grid.fields.length - (editing ? 2 : 1)));
	totalrow.append($('<td class="jsgrid-cell jsgrid-align-right"></td>').text('$' + gst.toFixed(2)));
	if (editing) {
		totalrow.append($('<td class="jsgrid-cell"></td>'));
	}
	$(args.grid._body).find('tr:last').after(totalrow);
	
	var totalrow = $('<tr class="jsgrid-row totalrow" style="font-weight: bold;"></tr>');
	totalrow.append($('<td class="jsgrid-cell">Total:</td>').prop('colspan', args.grid.fields.length - (editing ? 2 : 1)));
	totalrow.append($('<td class="jsgrid-cell jsgrid-align-right"></td>').text('$' + total.toFixed(2)));
	if (editing) {
		totalrow.append($('<td class="jsgrid-cell"></td>'));
	}
	$(args.grid._body).find('tr:last').after(totalrow);
}

// Allow floats
function FloatNumberField(config) {
	jsGrid.NumberField.call(this, config);
}
FloatNumberField.prototype = new jsGrid.NumberField({
	filterValue: function() {
		return parseFloat(this.filterControl.val());
	},
	insertValue: function() {
		return parseFloat(this.insertControl.val());
	},
	editValue: function() {
		return parseFloat(this.editControl.val());
	}
});
jsGrid.fields.float = FloatNumberField;

function makeGrid() {
	f = [
		{ name: 'Description', type: 'text', width: '50%', validate: 'required' },
		{ name: 'Unit price\n(incl GST)', type: 'float', width: '12.5%', validate: 'required', itemTemplate: function(value, item) { return '$' + value.toFixed(2); } },
		{ name: 'Units', type: 'float', width: '12.5%', validate: 'required' },
		{ name: 'GST-free', type: 'checkbox', width: '5%' },
		{ name: 'Total', align: 'right', width: '10%', itemTemplate: function(value, item) { return '$' + (item['Unit price\n(incl GST)'] * item['Units']).toFixed(2); } },
	];
	if (editing) {
		f.push({ type: 'control', width: '10%', modeSwitchButton: false });
	}
	
	$('#items_grid').jsGrid({
		width: '100%',
		height: editing ? '20em' : 'auto',
		inserting: editing,
		editing: editing,
		noDataContent: editing ? 'No entries. Enter details above then click the green plus icon.' : 'No entries',
		data: items_data,
		fields: f,
		onItemUpdated: recalcTotal,
		onRefreshed: recalcTotal,
	});
	
	if (!editing) {
		$('.jsgrid-filter-row, .jsgrid-insert-row').attr('style', 'display: none !important;'); /* Override Semantic UI */
	}
}