VandyHacks/vaken

import React, { FunctionComponent, useState, useCallback, useContext, useEffect } from 'react';
import styled from 'styled-components';
import Select from 'react-select';
import { Button } from '../../components/Buttons/Button';
import STRINGS from '../../assets/strings.json';
import FloatingPopup from '../../components/Containers/FloatingPopup';
import { Spinner } from '../../components/Loading/Spinner';
import { Collapsible } from '../../components/Containers/Collapsible';
import { GraphQLErrorMessage } from '../../components/Text/ErrorMessage';
import { FlexColumn, FlexRow } from '../../components/Containers/FlexContainers';
import { ActionButtonContext } from '../../contexts/ActionButtonContext';
import {
    useAssignEventToCompanyMutation,
    useAddOrUpdateEventMutation,
    useRemoveAbsentEventsMutation,
    useEventsQuery,
    useCompaniesQuery,
} from '../../generated/graphql';
import { updateEventsHandler, assignEventHandler } from './helpers';
import { EventUpdate } from './ManageEventTypes';

const timeFormatter = Intl.DateTimeFormat([], {
    weekday: 'long',
    month: 'short',
    day: 'numeric',
    hour: 'numeric',
    minute: 'numeric',
});

const SponsorSelect = styled(Select)`
    min-width: 15rem;
    width: 100%;
    display: inline-block;
    font-size: 1rem;
    margin-right: 1rem;
`;

const ManageEvents: FunctionComponent = (): JSX.Element => {
    const [output, setOutput] = useState('No updates to report');
    const [addOrUpdateEvent] = useAddOrUpdateEventMutation();
    const [removeAbsentEvents] = useRemoveAbsentEventsMutation();
    const [assignEventToCompany] = useAssignEventToCompanyMutation();
    const { update: setActionButton } = useContext(ActionButtonContext);
    const events = useEventsQuery();
    const companies = useCompaniesQuery();
    const [updatedEventsOpen, setupdatedEventsOpen] = useState(false);
    const [eventsAndSponsorsOpen, setEventsAndSponsorsOpen] = useState(true);

    const pullCalendarEvents = useCallback(async (): Promise<void> => {
        // TODO(#473): Use graphql for this fetch to take advantage of
        // Apollo caching
        const eventsList = (await fetch('/api/manage/events/pull').then(res =>
            res.json()
        )) as EventUpdate[];
        const updatedEvents = await updateEventsHandler(
            eventsList,
            addOrUpdateEvent,
            removeAbsentEvents
        );
        setOutput(JSON.stringify(updatedEvents, null, '\t'));
        setupdatedEventsOpen(true);
        // setAllEvents(data.events);
        // Place holder for events table showing all events, and some UI component listing events just pulled
        // TODO: Add events table and said UI component or just table, with columns being event attributes + time added
    }, [addOrUpdateEvent, removeAbsentEvents]);

    const assignSponsorEvent = useCallback(
        (eventID: string, companyID: string): Promise<void> =>
            assignEventHandler(eventID, companyID, assignEventToCompany),
        [assignEventToCompany]
    );

    useEffect((): (() => void) => {
        if (setActionButton) {
            setActionButton(
                <Button async warning onClick={pullCalendarEvents}>
                    Pull from Calendar
                </Button>
            );
        }
        return () => {
            if (setActionButton) setActionButton(undefined);
        };
    }, [setActionButton, pullCalendarEvents]);

    if (companies.loading || events.loading) {
        return <Spinner />;
    }

    if (events.error || companies.error || !companies.data || !events.data) {
        console.error(events.error ?? companies.error);
        return <GraphQLErrorMessage text={STRINGS.GRAPHQL_ORGANIZER_ERROR_MESSAGE} />;
    }

    const eventRows = [...events.data.events];
    eventRows.sort((a, b) => a.startTimestamp - b.startTimestamp);

    const companyOptions = companies.data.companies.map(({ name, id }) => ({
        label: name,
        value: id,
    }));

    return (
        <FloatingPopup>
            <Collapsible
                title="Updated Events"
                open={updatedEventsOpen}
                onClick={() => setupdatedEventsOpen(!updatedEventsOpen)}>
                <pre>{output}</pre>
            </Collapsible>
            <br />
            <Collapsible
                title="Events and Sponsors"
                open={eventsAndSponsorsOpen}
                onClick={() => setEventsAndSponsorsOpen(!eventsAndSponsorsOpen)}>
                {eventRows.map(event => (
                    <FlexRow key={event.id}>
                        <FlexColumn>
                            <p>{event.name}</p>
                            <p>{timeFormatter.format(new Date(event.startTimestamp))}</p>
                            <br />
                        </FlexColumn>
                        <FlexColumn>
                            <SponsorSelect
                                defaultValue={companyOptions.find(c => {
                                    if (!event.owner) return null;
                                    return c.value === event.owner.id;
                                })}
                                options={companyOptions}
                                onChange={(sponsor: typeof companyOptions[number]) => {
                                    assignSponsorEvent(event.id, sponsor.value);
                                }}
                            />
                        </FlexColumn>
                    </FlexRow>
                ))}
            </Collapsible>
        </FloatingPopup>
    );
};

export default ManageEvents;