import { ResponsiveBar } from '@nivo/bar';
import { Box, FlexContainer, FlexItem, Skeleton, Tooltip } from '@rocket.chat/fuselage';
import colors from '@rocket.chat/fuselage-tokens/dist/colors.json';
import { differenceInDays, addDays, format } from 'date-fns';
import { useMemo } from 'react';
import { useTranslation } from 'react-i18next';

import DownloadDataButton from '../../../../components/dashboards/DownloadDataButton';
import PeriodSelector from '../../../../components/dashboards/PeriodSelector';
import { usePeriodLabel } from '../../../../components/dashboards/usePeriodLabel';
import { usePeriodSelectorState } from '../../../../components/dashboards/usePeriodSelectorState';
import CounterSet from '../../../../components/dataView/CounterSet';
import { useFormatDate } from '../../../../hooks/useFormatDate';
import EngagementDashboardCardFilter from '../EngagementDashboardCardFilter';
import { useNewUsers } from './useNewUsers';

export type NewUsersSectionProps = {
	timezone: 'utc' | 'local';
};

const NewUsersSection = ({ timezone }: NewUsersSectionProps) => {
	const [period, periodSelectorProps] = usePeriodSelectorState('last 7 days', 'last 30 days', 'last 90 days');
	const periodLabel = usePeriodLabel(period);

	const utc = timezone === 'utc';
	const { data } = useNewUsers({ period, utc });

	const { t } = useTranslation();

	const formatDate = useFormatDate();

	const [countFromPeriod, variatonFromPeriod, countFromYesterday, variationFromYesterday, values] = useMemo(() => {
		if (!data) {
			return [];
		}

		const startDate = new Date(data.start);
		const endDate = new Date(data.end);
		const daysCount = differenceInDays(endDate, startDate) + 1;
		const values = Array.from({ length: daysCount }, (_, i) => ({
			date: addDays(startDate, i).toISOString(),
			newUsers: 0,
		}));
		for (const { day, users } of data.days) {
			const dayDate = new Date(day);
			const i = differenceInDays(dayDate, startDate);
			if (i >= 0) {
				values[i].newUsers += users;
			}
		}

		return [data.period.count, data.period.variation, data.yesterday.count, data.yesterday.variation, values];
	}, [data, utc]);

	return (
		<>
			<EngagementDashboardCardFilter>
				<PeriodSelector {...periodSelectorProps} />
				<DownloadDataButton
					attachmentName={`NewUsersSection_start_${data?.start}_end_${data?.end}`}
					headers={['Date', 'New Users']}
					dataAvailable={!!data}
					dataExtractor={(): unknown[][] | undefined => values?.map(({ date, newUsers }) => [date, newUsers])}
				/>
			</EngagementDashboardCardFilter>
			<CounterSet
				counters={[
					{
						count: countFromPeriod ?? <Skeleton variant='rect' width='3ex' height='1em' />,
						variation: variatonFromPeriod ?? 0,
						description: periodLabel,
					},
					{
						count: countFromYesterday ?? <Skeleton variant='rect' width='3ex' height='1em' />,
						variation: variationFromYesterday ?? 0,
						description: t('Yesterday'),
					},
				]}
			/>
			<FlexContainer>
				{values ? (
					<Box style={{ height: 300 }}>
						<FlexItem align='stretch' grow={1} shrink={0}>
							<Box style={{ position: 'relative' }}>
								<Box
									style={{
										position: 'absolute',
										width: '100%',
										height: '100%',
									}}
								>
									<ResponsiveBar
										data={values}
										indexBy='date'
										keys={['newUsers']}
										groupMode='grouped'
										padding={0.25}
										margin={{
											// TODO: Get it from theme
											bottom: 50,
											left: 20,
											top: 20,
										}}
										colors={[
											// TODO: Get it from theme
											colors.p500,
										]}
										enableLabel={false}
										enableGridY={false}
										axisTop={null}
										axisRight={null}
										axisBottom={{
											tickSize: values.length > 31 ? 4 : 0,
											// TODO: Get it from theme
											tickPadding: 8,
											tickRotation: values.length > 31 ? 90 : 0,
											truncateTickAt: 0,
											format: (date): string => format(new Date(date), 'dd/MM'),
										}}
										axisLeft={{
											tickSize: 0,
											// TODO: Get it from theme
											tickPadding: 4,
											tickRotation: 0,
										}}
										animate={true}
										motionConfig='stiff'
										theme={{
											// TODO: Get it from theme
											axis: {
												ticks: {
													text: {
														fill: colors.n600,
														fontFamily:
															'Inter, -apple-system, system-ui, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Meiryo UI", Arial, sans-serif',
														fontSize: '10px',
														fontStyle: 'normal',
														fontWeight: 600,
														letterSpacing: '0.2px',
														lineHeight: '12px',
													},
												},
											},
										}}
										tooltip={({ value, indexValue }) => (
											<Tooltip>
												{t('Value_users', { value })}, {formatDate(indexValue)}
											</Tooltip>
										)}
									/>
								</Box>
							</Box>
						</FlexItem>
					</Box>
				) : (
					<Box>
						<Skeleton variant='rect' height={240} />
					</Box>
				)}
			</FlexContainer>
		</>
	);
};

export default NewUsersSection;