odoo.define('kpi_dashboard.IntegerWidget', function (require) {
    "use strict";

    var AbstractWidget = require('kpi_dashboard.AbstractWidget');
    var registry = require('kpi_dashboard.widget_registry');
    var field_utils = require('web.field_utils');


    var IntegerWidget = AbstractWidget.extend({
        template: 'kpi_dashboard.number',
        digits: [3, 0],
        shortList: [
            [1000000000000, 'T', [3, 1]],
            [1000000000, 'G', [3, 1]],
            [1000000, 'M', [3, 1]],
            [1000, 'K', [3, 1]]
        ],
        shortNumber: function (num) {
            var suffix = '';
            var shortened = false;
            var digits = this.digits;
            _.each(this.shortList, function (shortItem) {
                if (!shortened && Math.abs(num) >= shortItem[0]) {
                    shortened = true;
                    suffix = shortItem[1];
                    num = num / shortItem[0];
                    digits = shortItem[2];
                }
            });
            return field_utils.format.float(num, false, {
                digits: digits}) + suffix;
        },
        fillWidget: function (values) {
            var widget = this.$el;
            var value = values.value.value;
            if (value === undefined) {
                value = 0;
            }
            var item = widget.find('[data-bind="value"]');
            if (item) {
                item.text(this.shortNumber(value));
            }
            var previous = values.value.previous;

            var $change_rate = widget.find('.change-rate');
            if (previous === undefined) {
                $change_rate.toggleClass('active', false);
            } else {
                var difference = 0;
                if (previous !== 0) {
                    difference = field_utils.format.integer(
                        (100 * value / previous) - 100) + '%';
                }
                $change_rate.toggleClass('active', true);
                var $difference = widget.find('[data-bind="difference"]');
                $difference.text(difference);
                var $arrow = widget.find('[data-bind="arrow"]');
                if (value < previous) {
                    $arrow.toggleClass('fa-arrow-up', false);
                    $arrow.toggleClass('fa-arrow-down', true);
                } else {
                    $arrow.toggleClass('fa-arrow-up', true);
                    $arrow.toggleClass('fa-arrow-down', false);
                }
            }
        },
    });

    registry.add('integer', IntegerWidget);
    return IntegerWidget;
});