import * as React from 'react';
import PropTypes from 'prop-types';
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';
import Card from "@mui/material/Card"; 

function createData(name, calories, fat, carbs, protein) {
  return {
    name,
    calories,
    fat,
    carbs,
    protein,
  };
}

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

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

function getComparator(order, orderBy) {
  return order === 'desc'
    ? (a, b) => descendingComparator(a, b, orderBy)
    : (a, b) => -descendingComparator(a, b, orderBy);
}

// This method is created for cross-browser compatibility, if you don't
// need to support IE11, you can use Array.prototype.sort() directly
function stableSort(array, comparator) {
  const stabilizedThis = array.map((el, index) => [el, index]);
  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]);
}

const headCells = [
  {
    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)',
  },
];

function EnhancedTableHead(props) {
  const { onSelectAllClick, order, orderBy, numSelected, rowCount, onRequestSort } =
    props;
  const createSortHandler = (property) => (event) => {
    onRequestSort(event, property);
  };

  return (
    <TableHead>
      <TableRow>
        <TableCell padding="checkbox">
          <Checkbox
            color="primary"
            indeterminate={numSelected > 0 && numSelected < rowCount}
            checked={rowCount > 0 && numSelected === rowCount}
            onChange={onSelectAllClick}
            inputProps={{
              'aria-label': 'select all desserts',
            }}
          />
        </TableCell>
        {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>
  );
}

EnhancedTableHead.propTypes = {
  numSelected: PropTypes.number.isRequired,
  onRequestSort: PropTypes.func.isRequired,
  onSelectAllClick: PropTypes.func.isRequired,
  order: PropTypes.oneOf(['asc', 'desc']).isRequired,
  orderBy: PropTypes.string.isRequired,
  rowCount: PropTypes.number.isRequired,
};

function EnhancedTableToolbar(props) {
  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),
        }),
      }}
      className='ss-table-toolbar'
    >
      {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>
  );
}

EnhancedTableToolbar.propTypes = {
  numSelected: PropTypes.number.isRequired,
};

export default function EnhancedTable() {
  const [order, setOrder] = React.useState('asc');
  const [orderBy, setOrderBy] = React.useState('calories');
  const [selected, setSelected] = React.useState([]);
  const [page, setPage] = React.useState(0);
  const [dense, setDense] = React.useState(false);
  const [rowsPerPage, setRowsPerPage] = React.useState(5);

  const handleRequestSort = (event, property) => {
    const isAsc = orderBy === property && order === 'asc';
    setOrder(isAsc ? 'desc' : 'asc');
    setOrderBy(property);
  };

  const handleSelectAllClick = (event) => {
    if (event.target.checked) {
      const newSelected = rows.map((n) => n.name);
      setSelected(newSelected);
      return;
    }
    setSelected([]);
  };

  const handleClick = (event, name) => {
    const selectedIndex = selected.indexOf(name);
    let newSelected = [];

    if (selectedIndex === -1) {
      newSelected = newSelected.concat(selected, name);
    } 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, newPage) => {
    setPage(newPage);
  };

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

  const handleChangeDense = (event) => {
    setDense(event.target.checked);
  };

  const isSelected = (name) => selected.indexOf(name) !== -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;

  return (
    <Card
      sx={{
        boxShadow: "none",
        borderRadius: "10px",
        p: "25px",
        mb: "15px",
      }}
    >
      <Typography
        as="h3"
        sx={{
          fontSize: 18,
          fontWeight: 500,
          mb: '10px'
        }}
      >
        Sorting & Selecting
      </Typography>

      <Box sx={{ width: '100%' }}>
        <Paper sx={{ width: '100%', mb: 2 }}>
          <EnhancedTableToolbar numSelected={selected.length} />
          <TableContainer>
            <Table
              sx={{ minWidth: 750 }}
              aria-labelledby="tableTitle"
              size={dense ? 'small' : 'medium'}
              className="dark-table sorting-selecting-table"
            >
              <EnhancedTableHead
                numSelected={selected.length}
                order={order}
                orderBy={orderBy}
                onSelectAllClick={handleSelectAllClick}
                onRequestSort={handleRequestSort}
                rowCount={rows.length}
              />
              <TableBody>
                {/* if you don't need to support IE11, you can replace the `stableSort` call with:
                  rows.sort(getComparator(order, orderBy)).slice() */}
                {stableSort(rows, getComparator(order, orderBy))
                  .slice(page * rowsPerPage, page * rowsPerPage + rowsPerPage)
                  .map((row, index) => {
                    const isItemSelected = isSelected(row.name);
                    const labelId = `enhanced-table-checkbox-${index}`;

                    return (
                      <TableRow
                        hover
                        onClick={(event) => handleClick(event, row.name)}
                        role="checkbox"
                        aria-checked={isItemSelected}
                        tabIndex={-1}
                        key={row.name}
                        selected={isItemSelected}
                      >
                        <TableCell padding="checkbox">
                          <Checkbox
                            color="primary"
                            checked={isItemSelected}
                            inputProps={{
                              'aria-labelledby': labelId,
                            }}
                          />
                        </TableCell>
                        <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: (dense ? 33 : 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}
            className='ss-table-table-pagination'
          />
        </Paper>

        <FormControlLabel
          control={<Switch checked={dense} onChange={handleChangeDense} />}
          label="Dense padding"
        />
      </Box>
    </Card>              
  );
}