import React from 'react';
import { createStyles, makeStyles, Theme } from '@material-ui/core/styles';
import InputLabel from '@material-ui/core/InputLabel';
import MenuItem from '@material-ui/core/MenuItem';
import FormHelperText from '@material-ui/core/FormHelperText';
import FormControl from '@material-ui/core/FormControl';
import Select from '@material-ui/core/Select';

const useStyles = makeStyles((theme: Theme) =>
  createStyles({
    formControl: {
      margin: theme.spacing(1),
      minWidth: 120,
    },
    selectEmpty: {
      marginTop: theme.spacing(2),
    },
  }),
);

export default function SimpleSelect() {
  const classes = useStyles();
  const [age, setAge] = React.useState('');

  const handleChange = (event: React.ChangeEvent<{ value: unknown }>) => {
    setAge(event.target.value as string);
  };

  return (
    <div>
      <FormControl className={classes.formControl}>
        <InputLabel id="demo-simple-select-label">Age</InputLabel>
        <Select
          labelId="demo-simple-select-label"
          id="demo-simple-select"
          value={age}
          onChange={handleChange}
        >
          <MenuItem value={10}>Ten</MenuItem>
          <MenuItem value={20}>Twenty</MenuItem>
          <MenuItem value={30}>Thirty</MenuItem>
        </Select>
      </FormControl>
      <FormControl className={classes.formControl}>
        <InputLabel id="demo-simple-select-helper-label">Age</InputLabel>
        <Select
          labelId="demo-simple-select-helper-label"
          id="demo-simple-select-helper"
          value={age}
          onChange={handleChange}
        >
          <MenuItem value="">
            <em>None</em>
          </MenuItem>
          <MenuItem value={10}>Ten</MenuItem>
          <MenuItem value={20}>Twenty</MenuItem>
          <MenuItem value={30}>Thirty</MenuItem>
        </Select>
        <FormHelperText>Some important helper text</FormHelperText>
      </FormControl>
      <FormControl className={classes.formControl}>
        <Select
          value={age}
          onChange={handleChange}
          displayEmpty
          className={classes.selectEmpty}
          inputProps={{ 'aria-label': 'Without label' }}
        >
          <MenuItem value="">
            <em>None</em>
          </MenuItem>
          <MenuItem value={10}>Ten</MenuItem>
          <MenuItem value={20}>Twenty</MenuItem>
          <MenuItem value={30}>Thirty</MenuItem>
        </Select>
        <FormHelperText>Without label</FormHelperText>
      </FormControl>
      <FormControl className={classes.formControl}>
        <InputLabel shrink id="demo-simple-select-placeholder-label-label">
          Age
        </InputLabel>
        <Select
          labelId="demo-simple-select-placeholder-label-label"
          id="demo-simple-select-placeholder-label"
          value={age}
          onChange={handleChange}
          displayEmpty
          className={classes.selectEmpty}
        >
          <MenuItem value="">
            <em>None</em>
          </MenuItem>
          <MenuItem value={10}>Ten</MenuItem>
          <MenuItem value={20}>Twenty</MenuItem>
          <MenuItem value={30}>Thirty</MenuItem>
        </Select>
        <FormHelperText>Label + placeholder</FormHelperText>
      </FormControl>
      <FormControl className={classes.formControl} disabled>
        <InputLabel id="demo-simple-select-disabled-label">Name</InputLabel>
        <Select
          labelId="demo-simple-select-disabled-label"
          id="demo-simple-select-disabled"
          value={age}
          onChange={handleChange}
        >
          <MenuItem value="">
            <em>None</em>
          </MenuItem>
          <MenuItem value={10}>Ten</MenuItem>
          <MenuItem value={20}>Twenty</MenuItem>
          <MenuItem value={30}>Thirty</MenuItem>
        </Select>
        <FormHelperText>Disabled</FormHelperText>
      </FormControl>
      <FormControl className={classes.formControl} error>
        <InputLabel id="demo-simple-select-error-label">Name</InputLabel>
        <Select
          labelId="demo-simple-select-error-label"
          id="demo-simple-select-error"
          value={age}
          onChange={handleChange}
          renderValue={(value) => `⚠️  - ${value}`}
        >
          <MenuItem value="">
            <em>None</em>
          </MenuItem>
          <MenuItem value={10}>Ten</MenuItem>
          <MenuItem value={20}>Twenty</MenuItem>
          <MenuItem value={30}>Thirty</MenuItem>
        </Select>
        <FormHelperText>Error</FormHelperText>
      </FormControl>
      <FormControl className={classes.formControl}>
        <InputLabel id="demo-simple-select-readonly-label">Name</InputLabel>
        <Select
          labelId="demo-simple-select-readonly-label"
          id="demo-simple-select-readonly"
          value={age}
          onChange={handleChange}
          inputProps={{ readOnly: true }}
        >
          <MenuItem value="">
            <em>None</em>
          </MenuItem>
          <MenuItem value={10}>Ten</MenuItem>
          <MenuItem value={20}>Twenty</MenuItem>
          <MenuItem value={30}>Thirty</MenuItem>
        </Select>
        <FormHelperText>Read only</FormHelperText>
      </FormControl>
      <FormControl className={classes.formControl}>
        <InputLabel id="demo-simple-select-autowidth-label">Age</InputLabel>
        <Select
          labelId="demo-simple-select-autowidth-label"
          id="demo-simple-select-autowidth"
          value={age}
          onChange={handleChange}
          autoWidth
        >
          <MenuItem value="">
            <em>None</em>
          </MenuItem>
          <MenuItem value={10}>Ten</MenuItem>
          <MenuItem value={20}>Twenty</MenuItem>
          <MenuItem value={30}>Thirty</MenuItem>
        </Select>
        <FormHelperText>Auto width</FormHelperText>
      </FormControl>
      <FormControl className={classes.formControl}>
        <Select
          value={age}
          onChange={handleChange}
          displayEmpty
          className={classes.selectEmpty}
          inputProps={{ 'aria-label': 'Without label' }}
        >
          <MenuItem value="" disabled>
            Placeholder
          </MenuItem>
          <MenuItem value={10}>Ten</MenuItem>
          <MenuItem value={20}>Twenty</MenuItem>
          <MenuItem value={30}>Thirty</MenuItem>
        </Select>
        <FormHelperText>Placeholder</FormHelperText>
      </FormControl>
      <FormControl required className={classes.formControl}>
        <InputLabel id="demo-simple-select-required-label">Age</InputLabel>
        <Select
          labelId="demo-simple-select-required-label"
          id="demo-simple-select-required"
          value={age}
          onChange={handleChange}
          className={classes.selectEmpty}
        >
          <MenuItem value="">
            <em>None</em>
          </MenuItem>
          <MenuItem value={10}>Ten</MenuItem>
          <MenuItem value={20}>Twenty</MenuItem>
          <MenuItem value={30}>Thirty</MenuItem>
        </Select>
        <FormHelperText>Required</FormHelperText>
      </FormControl>
      <FormControl variant="outlined" className={classes.formControl}>
        <InputLabel id="demo-simple-select-outlined-label">Age</InputLabel>
        <Select
          labelId="demo-simple-select-outlined-label"
          id="demo-simple-select-outlined"
          value={age}
          onChange={handleChange}
          label="Age"
        >
          <MenuItem value="">
            <em>None</em>
          </MenuItem>
          <MenuItem value={10}>Ten</MenuItem>
          <MenuItem value={20}>Twenty</MenuItem>
          <MenuItem value={30}>Thirty</MenuItem>
        </Select>
      </FormControl>
      <FormControl variant="filled" className={classes.formControl}>
        <InputLabel id="demo-simple-select-filled-label">Age</InputLabel>
        <Select
          labelId="demo-simple-select-filled-label"
          id="demo-simple-select-filled"
          value={age}
          onChange={handleChange}
        >
          <MenuItem value="">
            <em>None</em>
          </MenuItem>
          <MenuItem value={10}>Ten</MenuItem>
          <MenuItem value={20}>Twenty</MenuItem>
          <MenuItem value={30}>Thirty</MenuItem>
        </Select>
      </FormControl>
    </div>
  );
}