/** @format */
/**
 * External dependencies
 */
import { __ } from '@wordpress/i18n';
import { Component } from '@wordpress/element';
import { compose } from '@wordpress/compose';
import { format as formatDate } from '@wordpress/date';
import { get } from 'lodash';
import PropTypes from 'prop-types';

/**
 * WooCommerce dependencies
 */
import {
	getAllowedIntervalsForQuery,
	getCurrentDates,
	getDateFormatsForInterval,
	getIntervalForQuery,
	getChartTypeForQuery,
	getPreviousDate,
} from '@woocommerce/date';
import { Chart } from '@woocommerce/components';

/**
 * Internal dependencies
 */
import { getReportChartData, getTooltipValueFormat } from 'wc-api/reports/utils';
import ReportError from 'analytics/components/report-error';
import withSelect from 'wc-api/with-select';
import { getChartMode, getSelectedFilter } from './utils';

/**
 * Component that renders the chart in reports.
 */
export class ReportChart extends Component {
	getItemChartData() {
		const { primaryData, selectedChart } = this.props;
		const chartData = primaryData.data.intervals.map( function( interval ) {
			const intervalData = {};
			interval.subtotals.segments.forEach( function( segment ) {
				if ( segment.segment_label ) {
					const label = intervalData[ segment.segment_label ]
						? segment.segment_label + ' (#' + segment.segment_id + ')'
						: segment.segment_label;
					intervalData[ segment.segment_id ] = {
						label,
						value: segment.subtotals[ selectedChart.key ] || 0,
					};
				}
			} );
			return {
				date: formatDate( 'Y-m-d\\TH:i:s', interval.date_start ),
				...intervalData,
			};
		} );
		return chartData;
	}

	getTimeChartData() {
		const { query, primaryData, secondaryData, selectedChart } = this.props;
		const currentInterval = getIntervalForQuery( query );
		const { primary, secondary } = getCurrentDates( query );

		const chartData = primaryData.data.intervals.map( function( interval, index ) {
			const secondaryDate = getPreviousDate(
				interval.date_start,
				primary.after,
				secondary.after,
				query.compare,
				currentInterval
			);

			const secondaryInterval = secondaryData.data.intervals[ index ];
			return {
				date: formatDate( 'Y-m-d\\TH:i:s', interval.date_start ),
				primary: {
					label: `${ primary.label } (${ primary.range })`,
					labelDate: interval.date_start,
					value: interval.subtotals[ selectedChart.key ] || 0,
				},
				secondary: {
					label: `${ secondary.label } (${ secondary.range })`,
					labelDate: secondaryDate.format( 'YYYY-MM-DD HH:mm:ss' ),
					value: ( secondaryInterval && secondaryInterval.subtotals[ selectedChart.key ] ) || 0,
				},
			};
		} );

		return chartData;
	}

	renderChart( mode, isRequesting, chartData ) {
		const {
			emptySearchResults,
			filterParam,
			interactiveLegend,
			itemsLabel,
			legendPosition,
			path,
			query,
			selectedChart,
			showHeaderControls,
			primaryData,
		} = this.props;
		const currentInterval = getIntervalForQuery( query );
		const allowedIntervals = getAllowedIntervalsForQuery( query );
		const formats = getDateFormatsForInterval( currentInterval, primaryData.data.intervals.length );
		const emptyMessage = emptySearchResults
			? __( 'No data for the current search', 'wc-admin' )
			: __( 'No data for the selected date range', 'wc-admin' );
		return (
			<Chart
				allowedIntervals={ allowedIntervals }
				data={ chartData }
				dateParser={ '%Y-%m-%dT%H:%M:%S' }
				emptyMessage={ emptyMessage }
				filterParam={ filterParam }
				interactiveLegend={ interactiveLegend }
				interval={ currentInterval }
				isRequesting={ isRequesting }
				itemsLabel={ itemsLabel }
				legendPosition={ legendPosition }
				mode={ mode }
				path={ path }
				query={ query }
				screenReaderFormat={ formats.screenReaderFormat }
				showHeaderControls={ showHeaderControls }
				title={ selectedChart.label }
				tooltipLabelFormat={ formats.tooltipLabelFormat }
				tooltipTitle={ ( 'time-comparison' === mode && selectedChart.label ) || null }
				tooltipValueFormat={ getTooltipValueFormat( selectedChart.type ) }
				chartType={ getChartTypeForQuery( query ) }
				valueType={ selectedChart.type }
				xFormat={ formats.xFormat }
				x2Format={ formats.x2Format }
			/>
		);
	}

	renderItemComparison() {
		const { isRequesting, primaryData } = this.props;

		if ( primaryData.isError ) {
			return <ReportError isError />;
		}

		const isChartRequesting = isRequesting || primaryData.isRequesting;
		const chartData = this.getItemChartData();

		return this.renderChart( 'item-comparison', isChartRequesting, chartData );
	}

	renderTimeComparison() {
		const { isRequesting, primaryData, secondaryData } = this.props;

		if ( ! primaryData || primaryData.isError || secondaryData.isError ) {
			return <ReportError isError />;
		}

		const isChartRequesting =
			isRequesting || primaryData.isRequesting || secondaryData.isRequesting;
		const chartData = this.getTimeChartData();

		return this.renderChart( 'time-comparison', isChartRequesting, chartData );
	}

	render() {
		const { mode } = this.props;
		if ( 'item-comparison' === mode ) {
			return this.renderItemComparison();
		}
		return this.renderTimeComparison();
	}
}

ReportChart.propTypes = {
	/**
	 * Filters available for that report.
	 */
	filters: PropTypes.array,
	/**
	 * Whether there is an API call running.
	 */
	isRequesting: PropTypes.bool,
	/**
	 * Label describing the legend items.
	 */
	itemsLabel: PropTypes.string,
	/**
	 * Allows specifying properties different from the `endpoint` that will be used
	 * to limit the items when there is an active search.
	 */
	limitProperties: PropTypes.array,
	/**
	 * `items-comparison` (default) or `time-comparison`, this is used to generate correct
	 * ARIA properties.
	 */
	mode: PropTypes.string,
	/**
	 * Current path
	 */
	path: PropTypes.string.isRequired,
	/**
	 * Primary data to display in the chart.
	 */
	primaryData: PropTypes.object,
	/**
	 * The query string represented in object form.
	 */
	query: PropTypes.object.isRequired,
	/**
	 * Secondary data to display in the chart.
	 */
	secondaryData: PropTypes.object,
	/**
	 * Properties of the selected chart.
	 */
	selectedChart: PropTypes.object.isRequired,
};

ReportChart.defaultProps = {
	isRequesting: false,
	primaryData: {
		data: {
			intervals: [],
		},
		isError: false,
		isRequesting: false,
	},
	secondaryData: {
		data: {
			intervals: [],
		},
		isError: false,
		isRequesting: false,
	},
};

export default compose(
	withSelect( ( select, props ) => {
		const { endpoint, filters, isRequesting, limitProperties, query } = props;
		const limitBy = limitProperties || [ endpoint ];
		const selectedFilter = getSelectedFilter( filters, query );
		const filterParam = get( selectedFilter, [ 'settings', 'param' ] );
		const chartMode = props.mode || getChartMode( selectedFilter, query ) || 'time-comparison';

		const newProps = {
			mode: chartMode,
			filterParam,
		};

		if ( isRequesting ) {
			return newProps;
		}

		const hasLimitByParam = limitBy.some( item => query[ item ] && query[ item ].length );

		if ( query.search && ! hasLimitByParam ) {
			return {
				...newProps,
				emptySearchResults: true,
			};
		}

		if ( 'item-comparison' === chartMode ) {
			const primaryData = getReportChartData( endpoint, 'primary', query, select, limitBy );
			return {
				...newProps,
				primaryData,
			};
		}

		const primaryData = getReportChartData( endpoint, 'primary', query, select, limitBy );
		const secondaryData = getReportChartData( endpoint, 'secondary', query, select, limitBy );
		return {
			...newProps,
			primaryData,
			secondaryData,
		};
	} )
)( ReportChart );