import calendarStyles from "react-big-calendar/lib/css/react-big-calendar.css";
import { Calendar, dayjsLocalizer } from "react-big-calendar";
import dayjs from "dayjs";
import { type LinksFunction } from "@remix-run/cloudflare";
import { Card, CardHeader, Container, Heading } from "@chakra-ui/react";
import { useLoaderData } from "@remix-run/react";
import { useState } from "react";

export const links: LinksFunction = () => {
  return [{ href: calendarStyles, rel: "stylesheet" }];
};

export async function loader({ context }: { context: RequestContext }) {
  if (!context.data.current_user)
    throw new Response(null, {
      status: 401,
    });

  if (
    ![1 << 3, 1 << 4, 1 << 12].find(
      (p) => context.data.current_user.permissions & p,
    )
  )
    throw new Response(null, {
      status: 403,
    });

  const now = new Date();
  const eventsData = await context.env.D1.prepare(
    "SELECT answer, approved, created_by, day, details, id, month, pending, performed_at, reached_minimum_player_count, type, year FROM events WHERE month = ? AND year = ? ORDER BY day;",
  )
    .bind(now.getUTCMonth() + 1, now.getUTCFullYear())
    .all();

  if (eventsData.error)
    throw new Response(null, {
      status: 500,
    });

  const calendarData = eventsData.results.map((e) => {
    const dayDate = new Date(
      e.year as number,
      (e.month as number) - 1,
      e.day as number,
    );
    return {
      id: e.id,
      title: (e.type as string).toUpperCase(),
      allDay: true,
      start: dayDate,
      end: dayDate,
    };
  });

  return {
    calendarData,
    eventList: eventsData.results,
  };
}

export default function () {
  const data = useLoaderData<typeof loader>();
  const [selectedDate, setDate] = useState(new Date());

  return (
    <Container maxW="container.lg" h="600px">
      <Calendar
        events={data?.eventList}
        localizer={dayjsLocalizer(dayjs)}
        onSelectSlot={(s) => {
          setDate(s.slots.at(0) as Date);
        }}
        style={{ height: 500 }}
      />
      <Card id="event-extra-details">
        <CardHeader>
          <Heading size="sm">Events</Heading>
        </CardHeader>
      </Card>
    </Container>
  );
}