//Lib
import { useEffect } from 'react';
import { toast } from 'react-toastify';
import 'react-toastify/dist/ReactToastify.css';
import classes from '../UserSettings.module.css';
import { useState } from 'react';
import { SpinnerCircularFixed } from 'spinners-react';
import { IconExternalLink } from '@tabler/icons';
import Link from 'next/link';

//Components
import Error from '../../../Components/UI/Error/Error';
import Switch from '../../../Components/UI/Switch/Switch';

export default function EmailAlertSettings() {
    //Var
    const toastOptions = {
        position: 'top-right',
        autoClose: 5000,
        hideProgressBar: false,
        closeOnClick: true,
        pauseOnHover: true,
        draggable: true,
        progress: undefined,
        //Callback > re-enabled button after notification.
        onClose: () => setDisabled(false),
    };

    ////State
    const [isLoading, setIsLoading] = useState(true);
    const [testIsLoading, setTestIsLoading] = useState(false);
    const [error, setError] = useState();
    const [disabled, setDisabled] = useState(false);
    const [checked, setChecked] = useState();
    const [info, setInfo] = useState(false);

    ////LifeCycle
    //Component did mount
    useEffect(() => {
        const dataFetch = async () => {
            try {
                const response = await fetch('/api/account/getEmailAlert', {
                    method: 'GET',
                    headers: {
                        'Content-type': 'application/json',
                    },
                });
                setChecked((await response.json()).emailAlert);
                setIsLoading(false);
            } catch (error) {
                setError(
                    'Fetching email alert setting failed. Contact your administrator.'
                );
                console.log('Fetching email alert setting failed.');
                setIsLoading(false);
            }
        };
        dataFetch();
    }, []);

    ////Functions
    //Switch to enable/disable Email notifications
    const onChangeSwitchHandler = async (data) => {
        //Remove old error
        setError();
        //Disabled button
        setDisabled(true);
        await fetch('/api/account/updateEmailAlert', {
            method: 'PUT',
            headers: {
                'Content-type': 'application/json',
            },
            body: JSON.stringify(data),
        })
            .then((response) => {
                console.log(response);
                if (response.ok) {
                    if (data.emailAlert) {
                        setChecked(!checked);
                        toast.success(
                            'Email notification enabled !',
                            toastOptions
                        );
                    } else {
                        setChecked(!checked);
                        toast.success(
                            'Email notification disabled !',
                            toastOptions
                        );
                    }
                } else {
                    setError('Update email alert setting failed.');
                    setTimeout(() => {
                        setError();
                        setDisabled(false);
                    }, 4000);
                }
            })
            .catch((error) => {
                console.log(error);
                setError('Update failed. Contact your administrator.');
                setTimeout(() => {
                    setError();
                    setDisabled(false);
                }, 4000);
            });
    };

    //Send a test notification by email
    const onSendTestMailHandler = async () => {
        //Loading
        setTestIsLoading(true);
        //Remove old error
        setError();
        await fetch('/api/account/sendTestEmail', {
            method: 'POST',
        })
            .then((response) => {
                if (!response.ok) {
                    setTestIsLoading(false);
                    setError('Failed to send the notification.');
                    setTimeout(() => {
                        setError();
                    }, 4000);
                } else {
                    setTestIsLoading(false);
                    setInfo(true);
                    setTimeout(() => {
                        setInfo(false);
                    }, 4000);
                }
            })
            .catch((error) => {
                setTestIsLoading(false);
                console.log(error);
                setError('Send email failed. Contact your administrator.');
                setTimeout(() => {
                    setError();
                }, 4000);
            });
    };

    return (
        <>
            {/* EMAIL ALERT */}
            <div className={classes.containerSetting}>
                <div className={classes.settingCategory}>
                    <h2 style={{ alignSelf: 'baseline' }}>Email alert</h2>
                    <Link
                        style={{ alignSelf: 'baseline', marginLeft: '5px' }}
                        href='https://borgwarehouse.com/docs/user-manual/account/#alerting'
                        rel='noreferrer'
                        target='_blank'
                    >
                        <IconExternalLink size={16} color='#6c737f' />
                    </Link>
                </div>
                <div className={classes.setting}>
                    <div className={classes.bwFormWrapper}>
                        {isLoading ? (
                            <SpinnerCircularFixed
                                size={30}
                                thickness={150}
                                speed={150}
                                color='#704dff'
                                secondaryColor='#c3b6fa'
                            />
                        ) : (
                            <Switch
                                checked={checked}
                                disabled={disabled}
                                switchName='Alert me by email'
                                switchDescription='You will receive an alert every 24H if you have a down status.'
                                onChange={(e) =>
                                    onChangeSwitchHandler({ emailAlert: e })
                                }
                            />
                        )}
                        {testIsLoading ? (
                            <SpinnerCircularFixed
                                size={30}
                                thickness={150}
                                speed={150}
                                color='#704dff'
                                secondaryColor='#c3b6fa'
                            />
                        ) : (
                            <button
                                className='defaultButton'
                                onClick={onSendTestMailHandler}
                            >
                                Send a test mail
                            </button>
                        )}
                        {info && (
                            <span
                                style={{ marginLeft: '10px', color: '#119300' }}
                            >
                                Mail successfully sent.
                            </span>
                        )}
                        {error && <Error message={error} />}
                    </div>
                </div>
            </div>
        </>
    );
}