import rules from 'modele-social'
import { StrictMode, useContext, useMemo } from 'react'
import { Helmet } from 'react-helmet-async'
import { useTranslation } from 'react-i18next'
import { useSelector } from 'react-redux'
import { Redirect, Route, Switch } from 'react-router-dom'
import styled, { css } from 'styled-components'
import Footer from '@/components/layout/Footer/Footer'
import Header from '@/components/layout/Header'
import Route404 from '@/components/Route404'
import { useIsEmbedded } from '@/components/utils/embeddedContext'
import {
	engineFactory,
	EngineProvider,
	Rules,
	SituationProvider,
} from '@/components/utils/EngineContext'
import { SitePathsContext } from '@/components/utils/SitePathsContext'
import { Container, Spacing } from '@/design-system/layout'
import {
	configSituationSelector,
	situationSelector,
} from '@/selectors/simulationSelectors'
import Accessibilité from './pages/Accessibilité'
import Budget from './pages/Budget/Budget'
import Créer from './pages/Creer'
import IntegrationTest from './pages/Dev/IntegrationTest'
import Personas from './pages/Dev/Personas'
import Sitemap from './pages/Dev/Sitemap'
import Documentation from './pages/Documentation'
import Gérer from './pages/Gerer'
import Iframes from './pages/Iframes'
import Integration from './pages/integration/index'
import Landing from './pages/Landing/Landing'
import Nouveautés from './pages/Nouveautes/Nouveautes'
import Simulateurs from './pages/Simulateurs'
import Stats from './pages/Stats/LazyStats'
import Provider, { ProviderProps } from './Provider'
import redirects from './redirects'
import { constructLocalizedSitePath } from './sitePaths'
import {
	retrievePersistedInFranceApp,
	setupInFranceAppPersistence,
} from './storage/persistInFranceApp'
import { setupSimulationPersistence } from './storage/persistSimulation'

type RootProps = {
	basename: ProviderProps['basename']
	rulesPreTransform?: (rules: Rules) => Rules
}

export default function Root({
	basename,
	rulesPreTransform = (r) => r,
}: RootProps) {
	const { language } = useTranslation().i18n
	const paths = constructLocalizedSitePath(language as 'fr' | 'en')
	const engine = useMemo(
		() => engineFactory(rulesPreTransform(rules)),

		// We need to keep [rules] in the dependency list for hot reload of the rules
		// in dev mode, even if ESLint think it is unnecessary since `rules` isn't
		// defined in the component scope.
		//
		// eslint-disable-next-line react-hooks/exhaustive-deps
		[rules]
	)
	return (
		<StrictMode>
			<Provider
				basename={basename}
				sitePaths={paths}
				onStoreCreated={(store) => {
					setupInFranceAppPersistence(store)
					setupSimulationPersistence(store)
				}}
				initialStore={{
					inFranceApp: retrievePersistedInFranceApp(),
				}}
			>
				<EngineProvider value={engine}>
					<Router />
				</EngineProvider>
			</Provider>
		</StrictMode>
	)
}

const Router = () => {
	const userSituation = useSelector(situationSelector)
	const configSituation = useSelector(configSituationSelector)
	const situation = useMemo(
		() => ({
			...configSituation,
			...userSituation,
		}),
		[configSituation, userSituation]
	)
	return (
		<SituationProvider situation={situation}>
			<Switch>
				<Route exact path="/" component={Landing} />
				{/* Removes trailing slashes */}
				<Route
					path={'/:url*(/+)'}
					exact
					strict
					render={({ location }) => (
						<Redirect to={location.pathname.replace(/\/+$/, location.search)} />
					)}
				/>
				{redirects}
				<Route path="/iframes" component={Iframes} />
				<Route component={App} />
			</Switch>
		</SituationProvider>
	)
}

const App = () => {
	const { t } = useTranslation()
	const sitePaths = useContext(SitePathsContext)
	const isEmbedded = useIsEmbedded()
	return (
		<StyledLayout isEmbeded={isEmbedded}>
			{!isEmbedded && <Header />}
			<Helmet
				titleTemplate={`${t(['site.titleTemplate', '%s - Mon-entreprise'])}`}
			/>

			<Container>
				{/* Passing location down to prevent update blocking */}
				<Switch>
					<Route path={sitePaths.créer.index} component={Créer} />
					<Route path={sitePaths.gérer.index} component={Gérer} />
					<Route path={sitePaths.simulateurs.index} component={Simulateurs} />
					<Route
						path={sitePaths.documentation.index}
						component={Documentation}
					/>
					<Route path={sitePaths.integration.index} component={Integration} />
					<Route path={sitePaths.nouveautés} component={Nouveautés} />
					<Route path={sitePaths.stats} component={Stats} />
					<Route path={sitePaths.budget} component={Budget} />
					<Route path={sitePaths.accessibilité} component={Accessibilité} />

					<Route exact path="/dev/sitemap" component={Sitemap} />
					<Route
						exact
						path="/dev/integration-test"
						component={IntegrationTest}
					/>
					<Route exact path="/dev/personas" component={Personas} />

					<Route component={Route404} />
				</Switch>
				<Spacing xxl />
			</Container>
			{!isEmbedded && <Footer />}
		</StyledLayout>
	)
}

const StyledLayout = styled.div.attrs({ 'data-iframe-height': true })<{
	isEmbeded: boolean
}>`
	${({ isEmbeded }) =>
		!isEmbeded &&
		css`
			flex-direction: column;
			display: flex;
			height: 100%;
		`}
`