import PropTypes from "prop-types";
import { useState, useEffect } from "react";
import { useTheme } from "@emotion/react";
import {
  TableContainer,
  Paper,
  Table,
  TableHead,
  TableRow,
  TableCell,
  TableBody,
  TablePagination,
  Box,
  Typography,
  Stack,
} from "@mui/material";
import { useDispatch, useSelector } from "react-redux";
import { setRowsPerPage } from "../../Features/UI/uiSlice";
import LeftArrowDouble from "../../assets/icons/left-arrow-double.svg?react";
import RightArrowDouble from "../../assets/icons/right-arrow-double.svg?react";
import LeftArrow from "../../assets/icons/left-arrow.svg?react";
import RightArrow from "../../assets/icons/right-arrow.svg?react";
import SelectorVertical from "../../assets/icons/selector-vertical.svg?react";
import Button from "../Button";
import "./index.css";
/**
 * Component for pagination actions (first, previous, next, last).
 *
 * @component
 * @param {Object} props
 * @param {number} props.count - Total number of items.
 * @param {number} props.page - Current page number.
 * @param {number} props.rowsPerPage - Number of rows per page.
 * @param {function} props.onPageChange - Callback function to handle page change.
 *
 * @returns {JSX.Element} Pagination actions component.
 */
const TablePaginationActions = (props) => {
  const { count, page, rowsPerPage, onPageChange } = props;

  const handleFirstPageButtonClick = (event) => {
    onPageChange(event, 0);
  };
  const handleBackButtonClick = (event) => {
    onPageChange(event, page - 1);
  };
  const handleNextButtonClick = (event) => {
    onPageChange(event, page + 1);
  };
  const handleLastPageButtonClick = (event) => {
    onPageChange(event, Math.max(0, Math.ceil(count / rowsPerPage) - 1));
  };

  return (
    <Box sx={{ flexShrink: 0, ml: "24px" }}>
      <Button
        level="secondary"
        label=""
        img={<LeftArrowDouble />}
        onClick={handleFirstPageButtonClick}
        disabled={page === 0}
        aria-label="first page"
      />
      <Button
        level="secondary"
        label=""
        img={<LeftArrow />}
        onClick={handleBackButtonClick}
        disabled={page === 0}
        aria-label="previous page"
      />
      <Button
        level="secondary"
        label=""
        img={<RightArrow />}
        onClick={handleNextButtonClick}
        disabled={page >= Math.ceil(count / rowsPerPage) - 1}
        aria-label="next page"
      />
      <Button
        level="secondary"
        label=""
        img={<RightArrowDouble />}
        onClick={handleLastPageButtonClick}
        disabled={page >= Math.ceil(count / rowsPerPage) - 1}
        aria-label="last page"
      />
    </Box>
  );
};

TablePaginationActions.propTypes = {
  count: PropTypes.number.isRequired,
  page: PropTypes.number.isRequired,
  rowsPerPage: PropTypes.number.isRequired,
  onPageChange: PropTypes.func.isRequired,
};

/**
 * BasicTable Component
 * Renders a table with optional pagination.
 *
 * @component
 * @param {Object} props - Component props.
 * @param {Object} props.data - Data for the table including columns and rows.
 *   @param {Array} props.data.cols - Array of objects for column headers.
 *     @param {number} props.data.cols[].id - Unique identifier for the column.
 *     @param {string} props.data.cols[].name - Name of the column to display as header.
 *   @param {Array} props.data.rows - Array of row objects.
 *     @param {number} props.data.rows[].id - Unique identifier for the row.
 *     @param {Array} props.data.rows[].data - Array of cell data objects for the row.
 *       @param {number} props.data.rows[].data[].id - Unique identifier for the cell.
 *       @param {JSX.Element} props.data.rows[].data[].data - The content to display in the cell.
 *       @param {function} props.data.rows.data.handleClick - Function to call when the row is clicked.
 * @param {boolean} [props.paginated=false] - Flag to enable pagination.
 * @param {boolean} [props.reversed=false] - Flag to enable reverse order.
 * @param {number} props.rowsPerPage- Number of rows per page (table).
 *
 * @example
 * const data = {
 *   cols: [
 *     { id: 1, name: "First Col" },
 *     { id: 2, name: "Second Col" },
 *     { id: 3, name: "Third Col" },
 *     { id: 4, name: "Fourth Col" },
 *   ],
 *   rows: [
 *     {
 *       id: 1,
 *       data: [
 *         { id: 1, data: <div>Data for Row 1 Col 1</div> },
 *         { id: 2, data: <div>Data for Row 1 Col 2</div> },
 *         { id: 3, data: <div>Data for Row 1 Col 3</div> },
 *         { id: 4, data: <div>Data for Row 1 Col 4</div> },
 *       ],
 *     },
 *     {
 *       id: 2,
 *       data: [
 *         { id: 5, data: <div>Data for Row 2 Col 1</div> },
 *         { id: 6, data: <div>Data for Row 2 Col 2</div> },
 *         { id: 7, data: <div>Data for Row 2 Col 3</div> },
 *         { id: 8, data: <div>Data for Row 2 Col 4</div> },
 *       ],
 *     },
 *   ],
 * };
 *
 * <BasicTable data={data} rows={rows} paginated={true} />
 */

const BasicTable = ({ data, paginated, reversed, table }) => {
  const DEFAULT_ROWS_PER_PAGE = 5;
  const theme = useTheme();
  const dispatch = useDispatch();
  const uiState = useSelector((state) => state.ui);
  let rowsPerPage = uiState?.[table]?.rowsPerPage ?? DEFAULT_ROWS_PER_PAGE;
  const [page, setPage] = useState(0);

  useEffect(() => {
    setPage(0);
  }, [data]);

  const handleChangePage = (event, newPage) => {
    setPage(newPage);
  };

  const handleChangeRowsPerPage = (event) => {
    dispatch(
      setRowsPerPage({
        value: parseInt(event.target.value, 10),
        table: table,
      })
    );
    setPage(0);
  };

  let displayData = [];

  if (data && data.rows) {
    let rows = reversed ? [...data.rows].reverse() : data.rows;
    displayData = paginated
      ? rows.slice(page * rowsPerPage, page * rowsPerPage + rowsPerPage)
      : rows;
  }

  if (!data || !data.cols || !data.rows) {
    return <div>No data</div>;
  }

  /**
   * Helper function to calculate the range of displayed rows.
   * @returns {string}
   */
  const getRange = () => {
    let start = page * rowsPerPage + 1;
    let end = Math.min(page * rowsPerPage + rowsPerPage, data.rows.length);
    return `${start} - ${end}`;
  };

  return (
    <>
      <TableContainer
        component={Paper}
        sx={{
          backgroundColor: theme.palette.background.main,
          border: `solid 1px ${theme.palette.border.light}`,
          borderRadius: theme.shape.borderRadius,
        }}
      >
        <Table>
          <TableHead
            sx={{
              backgroundColor: theme.palette.background.accent,
            }}
          >
            <TableRow>
              {data.cols.map((col) => (
                <TableCell
                  key={col.id}
                  sx={{
                    color: theme.palette.text.secondary,
                    borderBottomColor: theme.palette.border.light,
                  }}
                >
                  {col.name}
                </TableCell>
              ))}
            </TableRow>
          </TableHead>
          <TableBody>
            {displayData.map((row) => {
              return (
                <TableRow
                  sx={{
                    cursor: row.handleClick ? "pointer" : "default",
                    "&:hover": {
                      backgroundColor: theme.palette.background.accent,
                    },
                  }}
                  key={row.id}
                  onClick={row.handleClick ? row.handleClick : null}
                >
                  {row.data.map((cell) => {
                    return (
                      <TableCell
                        key={cell.id}
                        sx={{
                          color: theme.palette.text.secondary,
                          borderBottomColor: theme.palette.border.light,
                        }}
                      >
                        {cell.data}
                      </TableCell>
                    );
                  })}
                </TableRow>
              );
            })}
          </TableBody>
        </Table>
      </TableContainer>
      {paginated && (
        <Stack
          direction="row"
          alignItems="center"
          justifyContent="space-between"
          px={theme.spacing(4)}
          sx={{
            "& p": {
              color: theme.palette.text.tertiary,
            },
          }}
        >
          <Typography px={theme.spacing(2)} fontSize={12} sx={{ opacity: 0.7 }}>
            Showing {getRange()} of {data.rows.length} monitor(s)
          </Typography>
          <TablePagination
            component="div"
            count={data.rows.length}
            page={page}
            onPageChange={handleChangePage}
            rowsPerPage={rowsPerPage}
            rowsPerPageOptions={[5, 10, 15, 25]}
            onRowsPerPageChange={handleChangeRowsPerPage}
            ActionsComponent={TablePaginationActions}
            labelRowsPerPage="Rows per page"
            labelDisplayedRows={({ page, count }) =>
              `Page ${page + 1} of ${Math.max(
                0,
                Math.ceil(count / rowsPerPage)
              )}`
            }
            slotProps={{
              select: {
                MenuProps: {
                  keepMounted: true,
                  PaperProps: {
                    className: "pagination-dropdown",
                    sx: {
                      mt: 0,
                      mb: theme.spacing(2),
                    },
                  },
                  transformOrigin: { vertical: "bottom", horizontal: "left" },
                  anchorOrigin: { vertical: "top", horizontal: "left" },
                  sx: { mt: theme.spacing(-2) },
                },
                inputProps: { id: "pagination-dropdown" },
                IconComponent: SelectorVertical,
                sx: {
                  ml: theme.spacing(4),
                  mr: theme.spacing(12),
                  minWidth: theme.spacing(20),
                  textAlign: "left",
                  "&.Mui-focused > div": {
                    backgroundColor: theme.palette.background.main,
                  },
                },
              },
            }}
            sx={{
              mt: theme.spacing(6),
              color: theme.palette.text.secondary,
              "& button.MuiButtonBase-root, & .MuiSelect-select": {
                border: 1,
                borderColor: theme.palette.border.light,
                borderRadius: theme.shape.borderRadius,
              },
              "& svg path": {
                stroke: theme.palette.text.tertiary,
                strokeWidth: 1.3,
              },
              "& button:not(.Mui-disabled):hover": {
                backgroundColor: theme.palette.background.fill,
                borderColor: theme.palette.background.fill,
              },
            }}
          />
        </Stack>
      )}
    </>
  );
};

BasicTable.propTypes = {
  data: PropTypes.object.isRequired,
  paginated: PropTypes.bool,
  reversed: PropTypes.bool,
  rowPerPage: PropTypes.number,
  table: PropTypes.string,
};

export default BasicTable;