import { useState } from "react";
import { useLocation } from "react-router-dom";
import { Box, 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";

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

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

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

  console.log(currentTariffs);

  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.privilegies.map((p) => p.type).includes("day") === (unit === "time") &&
      !tariff.isDeleted &&
      !tariff.isCustom
    );
  });

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

  console.log(isCustomTariffs);

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

        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.privilegies.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 ? "40px" : "20px",
        display: "flex",
        flexDirection: "column",
      }}
    >
      <Typography
        sx={{
          marginBottom: "23px",
          mt: "20px",
          fontSize: isMobile ? "24px" : "36px",
          fontWeight: "500",
        }}
      >
        {StepperText[unit]}
      </Typography>
      {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 покупали
      </Typography>
      <Slider items={createTariffElements(isCustomTariffs)} />
    </SectionWrapper>
  );
}
