import { useState } from "react"
import { useLocation } from "react-router-dom"
import { Box, IconButton, Typography, useMediaQuery, useTheme } from "@mui/material"
import SectionWrapper from "@components/SectionWrapper"
import { useTariffStore } from "@root/stores/tariffs"
import { enqueueSnackbar } from "notistack"
import { Select } from "@root/components/Select"
import { Tabs } from "@root/components/Tabs"
import TariffCard from "./TariffCard"
import NumberIcon from "@root/components/NumberIcon"
import { currencyFormatter } from "@root/utils/currencyFormatter"
import { calcIndividualTariffPrices } from "@root/utils/calcTariffPrices"
import { Tariff, getMessageFromFetchError } from "@frontend/kitui"
import FreeTariffCard from "./FreeTariffCard"
import { addTariffToCart, useUserStore } from "@root/stores/user"
import { useDiscountStore } from "@root/stores/discounts"
import { Slider } from "./slider"
import { useCartStore } from "@root/stores/cart"
import ArrowBackIcon from "@mui/icons-material/ArrowBack"
import { usePrevLocation } from "@root/utils/hooks/handleCustomBackNavigation"
import { withErrorBoundary } from "react-error-boundary"
import { handleComponentError } from "@root/utils/handleComponentError"

const subPages = ["Шаблонизатор", "Опросник", "Сокращатель ссылок"]

const StepperText: Record<string, string> = {
	volume: "Тарифы на объём",
	time: "Тарифы на время",
}

function TariffPage() {
	const theme = useTheme()
	const upMd = useMediaQuery(theme.breakpoints.up("md"))
	const isMobile = useMediaQuery(theme.breakpoints.down(600))
	const isTablet = useMediaQuery(theme.breakpoints.down(1000))
	const location = useLocation()
	const tariffs = useTariffStore((state) => state.tariffs)
	const [selectedItem, setSelectedItem] = useState<number>(0)
	const discounts = useDiscountStore((state) => state.discounts)
	const purchasesAmount = useUserStore((state) => state.userAccount?.wallet.purchasesAmount) ?? 0
	const cartTariffMap = useCartStore((state) => state.cartTariffMap)
	const isUserNko = useUserStore(state => state.userAccount?.status) === "nko"

	const handleCustomBackNavigation = usePrevLocation(location)

	const unit: string = String(location.pathname).slice(9)
	const currentTariffs = Object.values(cartTariffMap).filter((tariff): tariff is Tariff => typeof tariff === "object")

	function handleTariffItemClick(tariffId: string) {
		addTariffToCart(tariffId)
			.then(() => {
				enqueueSnackbar("Тариф добавлен в корзину")
			})
			.catch((error) => {
				const message = getMessageFromFetchError(error)
				if (message) enqueueSnackbar(message)
			})
	}

	const filteredTariffs = tariffs.filter((tariff) => {
		return (
			tariff.privileges.map((p) => p.type).includes("day") === (unit === "time") &&
      !tariff.isDeleted &&
      !tariff.isCustom
		)
	})

	const isCustomTariffs = tariffs.filter((tariff) => {
		return (
			tariff.privileges.map((p) => p.type).includes("day") === (unit === "time") &&
      !tariff.isDeleted &&
      tariff.isCustom
		)
	})

	const createTariffElements = (filteredTariffs: Tariff[]) => {
		const tariffElements = filteredTariffs
			.filter((tariff) => tariff.privileges.length > 0)
			.map((tariff, index) => {
				const { priceBeforeDiscounts, priceAfterDiscounts } = calcIndividualTariffPrices(
					tariff,
					discounts,
					purchasesAmount,
					currentTariffs,
					isUserNko,
				)

				return (
					<TariffCard
						key={tariff._id}
						icon={
							<NumberIcon
								number={index + 1}
								color={unit === "time" ? theme.palette.purple.main : theme.palette.orange.main}
								backgroundColor={unit === "time" ? "#EEE4FC" : "#FEDFD0"}
							/>
						}
						buttonProps={{
							text: "Выбрать",
							onClick: () => handleTariffItemClick(tariff._id),
						}}
						headerText={tariff.name}
						text={tariff.privileges.map((p) => `${p.name} - ${p.amount}`)}
						price={
							<>
								{priceBeforeDiscounts !== priceAfterDiscounts && (
									<Typography variant="oldPrice">{currencyFormatter.format(priceBeforeDiscounts / 100)}</Typography>
								)}
								<Typography variant="price">{currencyFormatter.format(priceAfterDiscounts / 100)}</Typography>
							</>
						}
					/>
				)
			})

		if (tariffElements.length < 6) tariffElements.push(<FreeTariffCard key="free_tariff_card" />)
		else tariffElements.splice(5, 0, <FreeTariffCard key="free_tariff_card" />)

		return tariffElements
	}

	return (
		<SectionWrapper
			maxWidth="lg"
			sx={{
				mt: "20px",
				mb: upMd ? "100px" : "63px",
				px: isTablet ? (isMobile ? "18px" : "40px") : "20px",
				display: "flex",
				flexDirection: "column",
			}}
		>
			<Box sx={{ display: "flex", alignItems: "center" }}>
				{isMobile && (
					<IconButton
						onClick={handleCustomBackNavigation}
						sx={{ p: 0, height: "28px", width: "28px", color: "black", marginRight: "10px" }}
					>
						<ArrowBackIcon />
					</IconButton>
				)}
				<Typography
					sx={{
						marginBottom: "23px",
						mt: "20px",
						fontSize: isMobile ? "24px" : "36px",
						fontWeight: "500",
					}}
				>
					{StepperText[unit]}
				</Typography>
			</Box>
			{isMobile ? (
				<Select items={subPages} selectedItem={selectedItem} setSelectedItem={setSelectedItem} />
			) : (
				<Tabs items={subPages} selectedItem={selectedItem} setSelectedItem={setSelectedItem} />
			)}
			<Box
				sx={{
					justifyContent: "left",
					mt: "40px",
					mb: "30px",
					display: "grid",
					gap: "40px",
					gridTemplateColumns: `repeat(auto-fit, minmax(300px, ${isTablet ? "436px" : "360px"}))`,
				}}
			>
				{createTariffElements(filteredTariffs)}
			</Box>
			<Typography
				sx={{
					mt: "40px",
					fontSize: isMobile ? "24px" : "36px",
					fontWeight: "500",
				}}
			>
        Ранее вы
			</Typography>
			<Slider items={createTariffElements(isCustomTariffs)} />
		</SectionWrapper>
	)
}

export default withErrorBoundary(TariffPage, {
	fallback: <Typography mt="8px" textAlign="center">Ошибка загрузки тарифов</Typography>,
	onError: handleComponentError,
})