import * as React from "react";
import { alpha } from "@mui/material/styles";
import Box from "@mui/material/Box";
import Table from "@mui/material/Table";
import TableBody from "@mui/material/TableBody";
import TableCell from "@mui/material/TableCell";
import TableContainer from "@mui/material/TableContainer";
import TableHead from "@mui/material/TableHead";
import TablePagination from "@mui/material/TablePagination";
import TableRow from "@mui/material/TableRow";
import TableSortLabel from "@mui/material/TableSortLabel";
import Toolbar from "@mui/material/Toolbar";
import Typography from "@mui/material/Typography";
import Paper from "@mui/material/Paper";
// import Checkbox from "@mui/material/Checkbox";
import IconButton from "@mui/material/IconButton";
import Tooltip from "@mui/material/Tooltip";
import FormControlLabel from "@mui/material/FormControlLabel";
// import Switch from "@mui/material/Switch";
// import DeleteIcon from '@mui/icons-material/Delete';
// import FilterListIcon from '@mui/icons-material/FilterList';
import { visuallyHidden } from "@mui/utils";

interface Data {
  id: number;
  calories: number;
  carbs: number;
  fat: number;
  name: string;
  protein: number;
}

function createData(
  id: number,
  name: string,
  calories: number,
  fat: number,
  carbs: number,
  protein: number,
): Data {
  return {
    id,
    name,
    calories,
    fat,
    carbs,
    protein,
  };
}

const rows = [
  createData(1, "Cupcake", 305, 3.7, 67, 4.3),
  createData(2, "Donut", 452, 25.0, 51, 4.9),
  createData(3, "Eclair", 262, 16.0, 24, 6.0),
  createData(4, "Frozen yoghurt", 159, 6.0, 24, 4.0),
  createData(5, "Gingerbread", 356, 16.0, 49, 3.9),
  createData(6, "Honeycomb", 408, 3.2, 87, 6.5),
  createData(7, "Ice cream sandwich", 237, 9.0, 37, 4.3),
  createData(8, "Jelly Bean", 375, 0.0, 94, 0.0),
  createData(9, "KitKat", 518, 26.0, 65, 7.0),
  createData(10, "Lollipop", 392, 0.2, 98, 0.0),
  createData(11, "Marshmallow", 318, 0, 81, 2.0),
  createData(12, "Nougat", 360, 19.0, 9, 37.0),
  createData(13, "Oreo", 437, 18.0, 63, 4.0),
];

function descendingComparator<T>(a: T, b: T, orderBy: keyof T) {
  if (b[orderBy] < a[orderBy]) {
    return -1;
  }
  if (b[orderBy] > a[orderBy]) {
    return 1;
  }
  return 0;
}

type Order = "asc" | "desc";

function getComparator<Key extends keyof any>(
  order: Order,
  orderBy: Key,
): (
  a: { [key in Key]: number | string },
  b: { [key in Key]: number | string },
) => number {
  return order === "desc"
    ? (a, b) => descendingComparator(a, b, orderBy)
    : (a, b) => -descendingComparator(a, b, orderBy);
}

function stableSort<T>(
  array: readonly T[],
  comparator: (a: T, b: T) => number,
) {
  const stabilizedThis = array.map((el, index) => [el, index] as [T, number]);
  stabilizedThis.sort((a, b) => {
    const order = comparator(a[0], b[0]);
    if (order !== 0) {
      return order;
    }
    return a[1] - b[1];
  });
  return stabilizedThis.map((el) => el[0]);
}

interface HeadCell {
  disablePadding: boolean;
  id: keyof Data;
  label: string;
  numeric: boolean;
}

const headCells: readonly HeadCell[] = [
  {
    id: "name",
    numeric: false,
    disablePadding: true,
    label: "Dessert (100g serving)",
  },
  {
    id: "calories",
    numeric: true,
    disablePadding: false,
    label: "Calories",
  },
  {
    id: "fat",
    numeric: true,
    disablePadding: false,
    label: "Fat (g)",
  },
  {
    id: "carbs",
    numeric: true,
    disablePadding: false,
    label: "Carbs (g)",
  },
  {
    id: "protein",
    numeric: true,
    disablePadding: false,
    label: "Protein (g)",
  },
];

interface EnhancedTableProps {
  numSelected: number;
  onRequestSort: (
    event: React.MouseEvent<unknown>,
    property: keyof Data,
  ) => void;
  onSelectAllClick: (event: React.ChangeEvent<HTMLInputElement>) => void;
  order: Order;
  orderBy: string;
  rowCount: number;
}

function EnhancedTableHead(props: EnhancedTableProps) {
  const {
    onSelectAllClick,
    order,
    orderBy,
    numSelected,
    rowCount,
    onRequestSort,
  } = props;
  const createSortHandler =
    (property: keyof Data) => (event: React.MouseEvent<unknown>) => {
      onRequestSort(event, property);
    };

  return (
    <TableHead>
      <TableRow>
        {headCells.map((headCell) => (
          <TableCell
            key={headCell.id}
            align={headCell.numeric ? "right" : "left"}
            padding={headCell.disablePadding ? "none" : "normal"}
            sortDirection={orderBy === headCell.id ? order : false}
          >
            <TableSortLabel
              active={orderBy === headCell.id}
              direction={orderBy === headCell.id ? order : "asc"}
              onClick={createSortHandler(headCell.id)}
            >
              {headCell.label}
              {orderBy === headCell.id ? (
                <Box component="span" sx={visuallyHidden}>
                  {order === "desc" ? "sorted descending" : "sorted ascending"}
                </Box>
              ) : null}
            </TableSortLabel>
          </TableCell>
        ))}
      </TableRow>
    </TableHead>
  );
}

interface EnhancedTableToolbarProps {
  numSelected: number;
}

function EnhancedTableToolbar(props: EnhancedTableToolbarProps) {
  const { numSelected } = props;

  return (
    <Toolbar
      sx={{
        pl: { sm: 2 },
        pr: { xs: 1, sm: 1 },
        ...(numSelected > 0 && {
          bgcolor: (theme) =>
            alpha(
              theme.palette.primary.main,
              theme.palette.action.activatedOpacity,
            ),
        }),
      }}
    >
      {numSelected > 0 ? (
        <Typography
          sx={{ flex: "1 1 100%" }}
          color="inherit"
          variant="subtitle1"
          component="div"
        >
          {numSelected} selected
        </Typography>
      ) : (
        <Typography
          sx={{ flex: "1 1 100%" }}
          variant="h6"
          id="tableTitle"
          component="div"
        >
          Nutrition
        </Typography>
      )}
      {numSelected > 0 ? (
        <Tooltip title="Delete">
          <IconButton>{/* <DeleteIcon /> */}</IconButton>
        </Tooltip>
      ) : (
        <Tooltip title="Filter list">
          <IconButton>{/* <FilterListIcon /> */}</IconButton>
        </Tooltip>
      )}
    </Toolbar>
  );
}
export default function EnhancedTable() {
  const [order, setOrder] = React.useState<Order>("asc");
  const [orderBy, setOrderBy] = React.useState<keyof Data>("calories");
  const [selected, setSelected] = React.useState<readonly number[]>([]);
  const [page, setPage] = React.useState(0);
  const [rowsPerPage, setRowsPerPage] = React.useState(5);

  const handleRequestSort = (
    event: React.MouseEvent<unknown>,
    property: keyof Data,
  ) => {
    const isAsc = orderBy === property && order === "asc";
    setOrder(isAsc ? "desc" : "asc");
    setOrderBy(property);
  };

  const handleSelectAllClick = (event: React.ChangeEvent<HTMLInputElement>) => {
    if (event.target.checked) {
      const newSelected = rows.map((n) => n.id);
      setSelected(newSelected);
      return;
    }
    setSelected([]);
  };

  const handleClick = (event: React.MouseEvent<unknown>, id: number) => {
    const selectedIndex = selected.indexOf(id);
    let newSelected: readonly number[] = [];

    if (selectedIndex === -1) {
      newSelected = newSelected.concat(selected, id);
    } else if (selectedIndex === 0) {
      newSelected = newSelected.concat(selected.slice(1));
    } else if (selectedIndex === selected.length - 1) {
      newSelected = newSelected.concat(selected.slice(0, -1));
    } else if (selectedIndex > 0) {
      newSelected = newSelected.concat(
        selected.slice(0, selectedIndex),
        selected.slice(selectedIndex + 1),
      );
    }
    setSelected(newSelected);
  };

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

  const handleChangeRowsPerPage = (
    event: React.ChangeEvent<HTMLInputElement>,
  ) => {
    setRowsPerPage(parseInt(event.target.value, 10));
    setPage(0);
  };

  const isSelected = (id: number) => selected.indexOf(id) !== -1;

  // Avoid a layout jump when reaching the last page with empty rows.
  const emptyRows =
    page > 0 ? Math.max(0, (1 + page) * rowsPerPage - rows.length) : 0;

  const visibleRows = React.useMemo(
    () =>
      stableSort(rows, getComparator(order, orderBy)).slice(
        page * rowsPerPage,
        page * rowsPerPage + rowsPerPage,
      ),
    [order, orderBy, page, rowsPerPage],
  );

  return (
    <Box sx={{ width: "100%" }}>
      <Paper sx={{ width: "100%", mb: 2 }}>
        <EnhancedTableToolbar numSelected={selected.length} />
        <TableContainer>
          <Table
            sx={{ minWidth: 750 }}
            aria-labelledby="tableTitle"
            size={"medium"}
          >
            <EnhancedTableHead
              numSelected={selected.length}
              order={order}
              orderBy={orderBy}
              onSelectAllClick={handleSelectAllClick}
              onRequestSort={handleRequestSort}
              rowCount={rows.length}
            />
            <TableBody>
              {visibleRows.map((row, index) => {
                const isItemSelected = isSelected(row.id);
                const labelId = `enhanced-table-checkbox-${index}`;

                return (
                  <TableRow
                    hover
                    onClick={(event) => handleClick(event, row.id)}
                    role="checkbox"
                    aria-checked={isItemSelected}
                    tabIndex={-1}
                    key={row.id}
                    selected={isItemSelected}
                    sx={{ cursor: "pointer" }}
                  >
                    <TableCell
                      component="th"
                      id={labelId}
                      scope="row"
                      padding="none"
                    >
                      {row.name}
                    </TableCell>
                    <TableCell align="right">{row.calories}</TableCell>
                    <TableCell align="right">{row.fat}</TableCell>
                    <TableCell align="right">{row.carbs}</TableCell>
                    <TableCell align="right">{row.protein}</TableCell>
                  </TableRow>
                );
              })}
              {emptyRows > 0 && (
                <TableRow
                  style={{
                    height: 53 * emptyRows,
                  }}
                >
                  <TableCell colSpan={6} />
                </TableRow>
              )}
            </TableBody>
          </Table>
        </TableContainer>
        <TablePagination
          rowsPerPageOptions={[5, 10, 25]}
          component="div"
          count={rows.length}
          rowsPerPage={rowsPerPage}
          page={page}
          onPageChange={handleChangePage}
          onRowsPerPageChange={handleChangeRowsPerPage}
        />
      </Paper>
    </Box>
  );
}