import { FC, useEffect, useMemo, useState } from "react";
import type { PaginationRenderItemParams } from "@mui/material";
import {
  Box,
  ButtonBase,
  Input,
  LinearProgress,
  Pagination as MuiPagination,
  PaginationItem,
  Paper,
  Typography,
  useMediaQuery,
  useTheme,
} from "@mui/material";

import { ReactComponent as DoubleCheckIcon } from "@icons/Analytics/doubleCheck.svg";
import { ReactComponent as NextIcon } from "@icons/Analytics/next.svg";
import { ReactComponent as LeftArrowIcon } from "@icons/Analytics/leftArrow.svg";
import { ReactComponent as RightArrowIcon } from "@icons/Analytics/rightArrow.svg";
import { extractOrder } from "@utils/extractOrder";

type AnswerProps = {
  title: string;
  percent: number;
  highlight?: boolean;
};

type AnswersProps = {
  data: Record<string, Record<string, number>> | null;
};

type PaginationProps = {
  page: number;
  pagesAmount: number;
  setPage: (page: number) => void;
};

const Answer = ({ title, percent, highlight }: AnswerProps) => {
  const theme = useTheme();

  return (
    <Box sx={{ padding: "15px 25px" }}>
      <Box
        sx={{
          position: "relative",
          display: "flex",
          gap: "15px",
          alignItems: "center",
          flexGrow: 1,
        }}
      >
        <LinearProgress
          variant="determinate"
          title={title}
          value={percent}
          sx={{
            width: "100%",
            height: "44px",
            background: theme.palette.background.default,
            borderRadius: "10px",
            border: `1px solid ${highlight ? theme.palette.brightPurple.main : theme.palette.grey2.main}`,
            "& > span": { background: highlight ? "#D9C0F9" : "#9A9AAF1A" },
            "&::before": {
              content: title ? `"${title}"` : `"Без имени"`,
              position: "absolute",
              zIndex: 1,
              left: "20px",
              top: "50%",
              transform: "translateY(-50%)",
              color: highlight
                ? theme.palette.brightPurple.main
                : theme.palette.grey3.main,
            },
          }}
        />
        <Box sx={{ minWidth: 35 }}>
          <Typography
            sx={{
              minWidth: "45px",
              fontWeight: highlight ? "bold" : "normal",
              color: highlight
                ? theme.palette.brightPurple.main
                : theme.palette.text.primary,
            }}
          >{`${percent.toFixed(1)}%`}</Typography>
        </Box>
      </Box>
    </Box>
  );
};

const Pagination = ({ page, setPage, pagesAmount }: PaginationProps) => {
  const [count, setCount] = useState<number>(0);
  const theme = useTheme();
  const isMobile = useMediaQuery(theme.breakpoints.down(855));

  useEffect(() => {
    setCount(pagesAmount);
  }, [pagesAmount]);

  const getPaginationItem = (props: PaginationRenderItemParams) => {
    if (props.type === "start-ellipsis" || props.type === "end-ellipsis") {
      return;
    }

    if (props.type !== "previous" && props.type !== "next" && props.page) {
      if (isMobile) {
        const allowedPages = [
          page - 1 < 1 ? page + 2 : page - 1,
          page,
          page + 1 > count ? page - 2 : page + 1,
        ];

        if (!allowedPages.includes(props.page)) {
          return;
        }
      }

      const allowedPages = [
        page - 2 < 1 ? page + 3 : page - 2,
        page - 1 < 1 ? page + 4 : page - 1,
        page,
        page + 1 > count ? page - 4 : page + 1,
        page + 2 > count ? page - 3 : page + 2,
      ];

      if (!allowedPages.includes(props.page)) {
        return;
      }
    }

    return (
      <PaginationItem
        component="div"
        slots={{ previous: LeftArrowIcon, next: RightArrowIcon }}
        {...{ ...props, variant: undefined }}
      />
    );
  };

  return (
    <Box
      sx={{
        display: "flex",
        alignItems: "center",
        justifyContent: "center",
        marginTop: "30px",
      }}
    >
      <Input
        disableUnderline
        placeholder="1"
        value={page}
        onChange={({ target }) => {
          const newPage = Number(target.value.replace(/\D/, ""));

          if (newPage <= count) {
            setPage(newPage);
          }
        }}
        sx={{
          height: "30px",
          width: "65px",
          borderRadius: "5px",
          padding: "10px",
          marginRight: "5px",
          boxShadow: "0 0 20px rgba(0, 0, 0, 0.15)",
          backgroundColor: theme.palette.background.paper,
        }}
      />
      <MuiPagination
        page={page}
        count={count}
        siblingCount={isMobile ? 1 : 2}
        boundaryCount={isMobile ? 1 : 2}
        onChange={(_, page) => setPage(page)}
        renderItem={getPaginationItem}
        sx={{
          "& .MuiButtonBase-root": {
            borderRadius: "5px",
            margin: "0 5px",
            height: "30px",
            background: theme.palette.background.paper,
            boxShadow: "0 0 20px rgba(0, 0, 0, 0.15)",
            "&.Mui-selected": {
              background: theme.palette.background.paper,
              color: theme.palette.brightPurple.main,
            },
            "&.MuiPaginationItem-previousNext": {
              margin: "0 15px",
              background: theme.palette.brightPurple.main,
            },
          },
        }}
      />
    </Box>
  );
};

export const Answers: FC<AnswersProps> = ({ data }) => {
  const [page, setPage] = useState<number>(1);
  const theme = useTheme();
  const answers = useMemo(() => {
    const unsortedAnswers = data === null ? [] : Object.entries(data ?? {});
    return unsortedAnswers.sort(
      ([titleA], [titleB]) => extractOrder(titleA) - extractOrder(titleB),
    );
  }, [data]);
  const currentAnswer = answers[page - 1];
  const percentsSum = Object.values(currentAnswer?.[1] ?? {}).reduce(
    (total, item) => (total += item),
    0,
  );
  const currentAnswerExtended =
    percentsSum >= 100
      ? Object.entries(currentAnswer?.[1] ?? {})
      : [
          ...Object.entries(currentAnswer?.[1] ?? {}),
          ["Другое", 100 - percentsSum] as [string, number],
        ];

  if (!data) {
    return (
      <Typography textAlign="center" m="10px 0">
        нет данных об ответах
      </Typography>
    );
  }

  return (
    <Box sx={{ flexGrow: 1 }}>
      <Paper
        sx={{
          borderRadius: "12px",
          boxShadow: "0 0 20px rgba(0, 0, 0, 0.15)",
          marginTop: "20px",
        }}
      >
        <Box
          sx={{
            display: "flex",
            gap: "10px",
            alignItems: "center",
            padding: "25px",
          }}
        >
          <Typography
            component="h3"
            sx={{
              flexGrow: 1,
              position: "relative",
              fontSize: "18px",
              fontWeight: "bold",
              paddingLeft: "40px",
              color: theme.palette.text.primary,
              "&::before": {
                content: "'1'",
                position: "absolute",
                top: "50%",
                left: "0",
                transform: "translateY(-50%)",
                display: "flex",
                alignItems: "center",
                justifyContent: "center",
                width: "30px",
                height: "30px",
                borderRadius: "50%",
                fontSize: "14px",
                fontWeight: "normal",
                background: "#EEE4FC",
                color: theme.palette.brightPurple.main,
              },
            }}
          >
            Заголовок вопроса.
            {currentAnswer?.[0].split("(")[0].trim()
              ? ` ${currentAnswer?.[0]}`
              : "Без заголовка"}
          </Typography>
          <ButtonBase>
            <DoubleCheckIcon />
          </ButtonBase>
          <ButtonBase>
            <NextIcon />
          </ButtonBase>
        </Box>
        {currentAnswerExtended.map(([title, percent], index) => (
          <Answer
            key={index}
            title={title}
            percent={percent}
            highlight={!index}
          />
        ))}
      </Paper>
      <Pagination page={page} setPage={setPage} pagesAmount={answers.length} />
    </Box>
  );
};