/*!
 * @license
 * Copyright 2019 Alfresco Software, Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import moment from 'moment-es6';
import { Chart } from './chart.model';

export class BarChart extends Chart {
    title: string;
    titleKey: string;
    labels: any = [];
    datasets: any[] = [];
    data: any[] = [];
    xAxisType: string;
    yAxisType: string;
    options: any = {
        responsive: true,
        scales: {
            yAxes: [{
                ticks: {
                    beginAtZero: true,
                    stepSize: 1
                }
            }],
            xAxes: [{
                ticks: {
                },
                stacked: false
            }]
        }
    };

    constructor(obj?: any) {
        super(obj);
        this.title = obj && obj.title || null;
        this.titleKey = obj && obj.titleKey || null;
        this.xAxisType = obj && obj.xAxisType || null;
        this.yAxisType = obj && obj.yAxisType || null;
        this.options.scales.xAxes[0].ticks.callback = this.xAxisTickFormatFunction(this.xAxisType);
        this.options.scales.yAxes[0].ticks.callback = this.yAxisTickFormatFunction(this.yAxisType);
        if (obj.values) {
            obj.values.forEach((params: any) => {
                const dataValue = [];
                params.values.forEach((info: any) => {
                    info.forEach((value: any, index: any) => {
                        if (index % 2 === 0) {
                            if (!this.labels.includes(value)) {
                                this.labels.push(value);
                            }
                        } else {
                            dataValue.push(value);
                        }
                    });
                });
                if (dataValue && dataValue.length > 0) {
                    this.datasets.push({data: dataValue, label: params.key});
                }
            });
        }
    }

    xAxisTickFormatFunction = function (xAxisType) {
        return function (value) {
            if (xAxisType !== null && xAxisType !== undefined) {
                if ('date_day' === xAxisType) {
                    return moment(new Date(value)).format('DD');
                } else if ('date_month' === xAxisType) {
                    return moment(new Date(value)).format('MMMM');
                } else if ('date_year' === xAxisType) {
                    return moment(new Date(value)).format('YYYY');
                }
            }
            return value;
        };
    };

    yAxisTickFormatFunction = function (yAxisType) {
        return function (value) {
            if (yAxisType !== null && yAxisType !== undefined) {
                if ('count' === yAxisType) {
                    const label = '' + value;
                    if (label.indexOf('.') !== -1) {
                        return '';
                    }
                }
            }
            return value;
        };
    };

    hasDatasets() {
        return this.datasets && this.datasets.length > 0 ? true : false;
    }
}