import React from 'react';
import Grid from '@material-ui/core/Grid';
import Box from '@material-ui/core/Box';
import Button from '@material-ui/core/Button';
import Typography from '@material-ui/core/Typography';
import TextField from '@material-ui/core/TextField';
import FormHelperText from '@material-ui/core/FormHelperText';
import Radio from '@material-ui/core/Radio';
import RadioGroup from '@material-ui/core/RadioGroup';
import FormControlLabel from '@material-ui/core/FormControlLabel';
import FormControl from '@material-ui/core/FormControl';
import FormLabel from '@material-ui/core/FormLabel';

import Alert from '@material-ui/lab/Alert';

import {configureDatabase, testDatabaseConnection} from '../api/bbgo';

import {makeStyles} from '@material-ui/core/styles';

const useStyles = makeStyles((theme) => ({
    formControl: {
        marginTop: theme.spacing(1),
        marginBottom: theme.spacing(1),
        minWidth: 120,
    },
    buttons: {
        display: 'flex',
        justifyContent: 'flex-end',
        marginTop: theme.spacing(2),
        paddingTop: theme.spacing(2),
        paddingBottom: theme.spacing(2),
        '& > *': {
            marginLeft: theme.spacing(1),
        }
    },
}));

export default function ConfigureDatabaseForm({onConfigured}) {
    const classes = useStyles();

    const [mysqlURL, setMysqlURL] = React.useState("root@tcp(127.0.0.1:3306)/bbgo")

    const [driver, setDriver] = React.useState("sqlite3");
    const [testing, setTesting] = React.useState(false);
    const [testResponse, setTestResponse] = React.useState(null);
    const [configured, setConfigured] = React.useState(false);

    const getDSN = () => driver === "sqlite3" ? "file:bbgo.sqlite3" : mysqlURL

    const resetTestResponse = () => {
        setTestResponse(null)
    }

    const handleConfigureDatabase = (event) => {
        const dsn = getDSN()

        configureDatabase({driver, dsn}, (response) => {
            console.log(response);
            setTesting(false);
            setTestResponse(response);
            if (onConfigured) {
                setConfigured(true);
                setTimeout(onConfigured, 3000);
            }

        }).catch((err) => {
            console.error(err);
            setTesting(false);
            setTestResponse(err.response.data);
        })
    }

    const handleTestConnection = (event) => {
        const dsn = getDSN()

        setTesting(true);
        testDatabaseConnection({driver, dsn}, (response) => {
            console.log(response)
            setTesting(false)
            setTestResponse(response)
        }).catch((err) => {
            console.error(err)
            setTesting(false)
            setTestResponse(err.response.data)
        })
    };

    return (
        <React.Fragment>
            <Typography variant="h6" gutterBottom>
                Configure Database
            </Typography>

            <Typography variant="body1" gutterBottom>
                If you have database installed on your machine, you can enter the DSN string in the following field.
                Please note this is optional, you CAN SKIP this step.
            </Typography>


            <Grid container spacing={3}>
                <Grid item xs={12} sm={4}>
                    <Box m={6}>
                        <FormControl component="fieldset" required={true}>
                            <FormLabel component="legend">Database Driver</FormLabel>
                            <RadioGroup aria-label="driver" name="driver" value={driver} onChange={(event) => {
                                setDriver(event.target.value);
                            }}>
                                <FormControlLabel value="sqlite3" control={<Radio/>} label="Standard (Default)"/>
                                <FormControlLabel value="mysql" control={<Radio/>} label="MySQL"/>
                            </RadioGroup>
                        </FormControl>
                        <FormHelperText>
                        </FormHelperText>
                    </Box>
                </Grid>

                {driver === "mysql" ? (
                    <Grid item xs={12} sm={8}>
                        <TextField id="mysql_url" name="mysql_url" label="MySQL Data Source Name"
                                   fullWidth
                                   required
                                   defaultValue={mysqlURL}
                                   onChange={(event) => {
                                       setMysqlURL(event.target.value)
                                       resetTestResponse()
                                   }}
                        />
                        <FormHelperText>MySQL DSN</FormHelperText>

                        <Typography variant="body1" gutterBottom>
                            If you have database installed on your machine, you can enter the DSN string like the
                            following
                            format:
                            <br/>
                            <pre><code>root:password@tcp(127.0.0.1:3306)/bbgo</code></pre>

                            <br/>
                            Be sure to create your database before using it. You need to execute the following statement
                            to
                            create a database:
                            <br/>
                            <pre><code>CREATE DATABASE bbgo CHARSET utf8;</code></pre>
                        </Typography>

                    </Grid>
                ) : (
                    <Grid item xs={12} sm={8}>
                        <Box m={6}>
                            <Typography variant="body1" gutterBottom>
                                If you don't know what to choose, just pick the standard driver (sqlite3).
                                <br/>
                                For professionals, you can pick MySQL driver, BBGO works best with MySQL, especially for
                                larger data scale.
                            </Typography>
                        </Box>
                    </Grid>
                )}
            </Grid>


            <div className={classes.buttons}>
                <Button
                    color="primary"
                    onClick={handleTestConnection}
                    disabled={testing || configured}
                >
                    {testing ? "Testing" : "Test Connection"}
                </Button>

                <Button
                    variant="contained"
                    color="primary"
                    disabled={testing || configured}
                    onClick={handleConfigureDatabase}
                >
                    Configure
                </Button>
            </div>

            {
                testResponse ? testResponse.error ? (
                    <Box m={2}>
                        <Alert severity="error">{testResponse.error}</Alert>
                    </Box>
                ) : testResponse.success ? (
                    <Box m={2}>
                        <Alert severity="success">Connection Test Succeeded</Alert>
                    </Box>
                ) : null : null
            }


        </React.Fragment>
    );

}