import React, { useState } from 'react';
import { Grid, TextField, Button } from '@material-ui/core';
import { post } from '../../requests';
import { Event } from '../../types';

interface PropTypes {
  mutate: () => void;
}

const EventForm: React.FC<PropTypes> = ({ mutate }) => {
  const [name, setName] = useState<string>('');
  const [schedule, setSchedule] = useState<string>('* * * * * *');
  const [attendanceId, setAttendanceId] = useState<string>('');
  const [conferenceId, setConferenceId] = useState<string>('');

  const createHandler = (setter: any) => (event: React.ChangeEvent<HTMLInputElement>) => {
    setter(event.target.value);
  };

  const handleSubmit = () => {
    if (schedule && conferenceId) {
      const event: Partial<Event> = {
        type: 'class',
        schedule,
        context: {
          name,
          attendanceId,
          conferenceId,
          participants: []
        }
      };

      setName('');
      setAttendanceId('');
      setConferenceId('');
      setSchedule('');

      return post('/events', event).then(() => mutate());
    }
  }

  return (
    <Grid container spacing={2}>
      <Grid item sm={6} xs={12}>
        <TextField
          value={name}
          onChange={createHandler(setName)}
          variant="outlined"
          label="Name"
          fullWidth
          required
        />
      </Grid>
      <Grid item sm={6} xs={12}>
        <TextField
          value={schedule}
          onChange={createHandler(setSchedule)}
          variant="outlined"
          label="Date"
          fullWidth
          required
        />
      </Grid>
      <Grid item sm={6} xs={12}>
        <TextField
          value={conferenceId}
          onChange={createHandler(setConferenceId)}
          variant="outlined"
          label="Conference ID"
          fullWidth
          required
        />
      </Grid>
      <Grid item sm={6} xs={12}>
        <TextField
          value={attendanceId}
          onChange={createHandler(setAttendanceId)}
          variant="outlined"
          label="Attendance ID"
          fullWidth
        />
      </Grid>
      <Grid item sm={2} xs={12}>
        <Button
          onClick={handleSubmit}
          variant="contained"
          size="large"
          color="primary"
          fullWidth
        >
          Create event
        </Button>
      </Grid>
    </Grid>
  );
};

export default EventForm;
