import { DownloadOutlined, FilterOutlined } from '@ant-design/icons';
import { Alert, Button, Space, message } from 'antd';
import { useEffect, useState } from 'react';
import { useParams } from 'react-router-dom';
import { ApiError } from '../api/client';
import PageTitle from '../components/PageTitle';
import { TableTag } from '../components/TableTag/TableTag';
import { TAG_PRESETS } from '../components/TableTag/presets';
import { getVersionCard } from '../services/api/consolidations';
import { exportOsv } from '../services/api/osv';
import type { ConsolidatedRowOut } from '../types/api';
import type { ConsRussianStatus } from '../types/consolidations/common_types';
import type { VersionCard } from '../types/consolidations/version_members';
import { exportFilename, saveBlob } from '../utils/download';
import { quarterShortLabel } from '../utils/labels';
import { statusColorMapping, statusMapping } from '../widgets/ConsoleTable/consts';
import { CounterpartyMapModal } from '../widgets/ConsolidatedOsv/CounterpartyMapModal';
import { OsvGaps } from '../widgets/ConsolidatedOsv/OsvGaps';
import { OsvTable } from '../widgets/ConsolidatedOsv/OsvTable';
import { OsvTabs } from '../widgets/ConsolidatedOsv/OsvTabs';
import { mapEntryId } from '../widgets/ConsolidatedOsv/counterpartyMapping';
import { OSV_PAGE_SIZE, useConsolidatedOsv } from '../widgets/ConsolidatedOsv/useConsolidatedOsv';

function OsvContent({ versionId }: { versionId: string }) {
	const [card, setCard] = useState<VersionCard | null>(null);
	const [exporting, setExporting] = useState(false);
	// строка, для которой открыт выбор организации («Указать»)
	const [mapping, setMapping] = useState<ConsolidatedRowOut | null>(null);
	const osv = useConsolidatedOsv(versionId);

	useEffect(() => {
		let actual = true;
		getVersionCard(versionId)
			.then((c) => {
				if (actual) setCard(c);
			})
			.catch((e: unknown) => {
				if (actual) message.error(e instanceof ApiError ? e.message : 'Не удалось получить версию');
			});
		return () => {
			actual = false;
		};
	}, [versionId]);

	const download = async () => {
		setExporting(true);
		try {
			const { blob, filename } = await exportOsv(versionId, osv.filters);
			saveBlob(blob, filename ?? exportFilename(card?.company_group.name ?? 'ГК', card?.year ?? 0, card?.quarter ?? ''));
		} catch (e: unknown) {
			message.error(e instanceof ApiError ? e.message : 'Не удалось выгрузить свод');
		} finally {
			setExporting(false);
		}
	};

	const s = osv.summary;
	const unmapped = s?.unmapped_total ?? 0;
	const onlyUnmapped = osv.filters.unmapped === true;
	const russianStatus = card ? (statusMapping[card.status] ?? card.status) : '';
	const preset = statusColorMapping[russianStatus as ConsRussianStatus] ?? TAG_PRESETS.default;
	const groupName = card?.company_group.name ?? '';
	const period = card ? `${card.year} · ${quarterShortLabel(card.quarter)}` : '';
	return (
		<div style={{ padding: 12, display: 'flex', flexDirection: 'column', height: '100vh', gap: 12 }}>
			<PageTitle
				backable
				location={['Отчётность', groupName, period]}
				header={card ? `${groupName} — ${card.year} ${quarterShortLabel(card.quarter)}` : 'Сводная ОСВ'}
				description={russianStatus}
				extra={
					card && (
						<Space size={8}>
							<span style={{ color: '#667085', fontSize: 12 }}>Статус отчёта</span>
							<TableTag text={russianStatus} {...preset} />
						</Space>
					)
				}
			/>
			<OsvTabs />
			<main
				style={{
					flex: '1 1 auto',
					minHeight: 0,
					background: 'white',
					borderRadius: 12,
					padding: 12,
					display: 'flex',
					flexDirection: 'column',
					gap: 12,
				}}>
				<div style={{ display: 'flex', justifyContent: 'flex-end' }}>
					<Button icon={<DownloadOutlined />} loading={exporting} onClick={download}>
						Экспорт
					</Button>
				</div>
				{osv.error && <Alert type='error' showIcon title={osv.error} />}
				{unmapped > 0 && (
					<div
						style={{
							display: 'flex',
							alignItems: 'center',
							gap: 12,
							flexWrap: 'wrap',
							background: '#fffbe6',
							border: '1px solid #ffe58f',
							borderRadius: 8,
							padding: '8px 12px',
							color: '#ad6800',
						}}>
						<strong>Требуется указать соответствия</strong>
						<span>Для перехода к следующему шагу сопоставьте все внешние организации без ИНН. Осталось: {unmapped}.</span>
						<Button
							style={{ marginLeft: 'auto' }}
							icon={<FilterOutlined />}
							type={onlyUnmapped ? 'primary' : 'default'}
							onClick={() => osv.patchFilters({ unmapped: !onlyUnmapped })}>
							{onlyUnmapped ? 'Показать все строки' : 'Показать ЮЛ без ИНН'}
						</Button>
					</div>
				)}
				<OsvGaps gaps={s?.gaps ?? []} />
				<OsvTable
					rows={osv.rows}
					total={osv.total}
					page={osv.page}
					pageSize={OSV_PAGE_SIZE}
					loading={osv.loading}
					filters={osv.filters}
					members={(card?.members ?? []).map((m) => ({ id: m.id, name: m.name }))}
					onPage={osv.setPage}
					onFilter={osv.patchFilters}
					onMap={setMapping}
				/>
			</main>
			{mapping && (
				<CounterpartyMapModal
					key={mapEntryId(mapping)}
					versionId={versionId}
					row={mapping}
					onClose={() => setMapping(null)}
					onMapped={osv.refresh}
				/>
			)}
		</div>
	);
}

export function ConsolidatedOsvPage() {
	const { version_id = '' } = useParams();
	// key: при смене версии всё состояние (фильтры, страница, данные) создаётся заново
	return <OsvContent key={version_id} versionId={version_id} />;
}