import {
  Box,
  Button,
  Card,
  CardBody,
  CardFooter,
  Container,
  Flex,
  FormControl,
  FormLabel,
  Heading,
  IconButton,
  Link,
  Modal,
  ModalBody,
  ModalCloseButton,
  ModalContent,
  ModalFooter,
  ModalHeader,
  ModalOverlay,
  Stack,
  StackDivider,
  Switch,
  Text,
  useDisclosure,
  useToast,
  VStack,
} from "@chakra-ui/react";
import { useLoaderData } from "@remix-run/react";
import { useState } from "react";
import calendarStyles from "react-big-calendar/lib/css/react-big-calendar.css";
import { type LinksFunction } from "@remix-run/cloudflare";

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 monthEventList = 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 ASC;",
  )
    .bind(now.getUTCMonth() + 1, now.getUTCFullYear())
    .all();

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

  const membersList = await context.env.D1.prepare(
    "SELECT id, name FROM et_members WHERE id IN (SELECT created_by FROM events WHERE month = ? AND year = ?);",
  )
    .bind(now.getUTCMonth() + 1, now.getUTCFullYear())
    .all();

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

  return {
    can_approve: Boolean(
      [1 << 4, 1 << 12].find((p) => context.data.current_user.permissions & p),
    ),
    events: monthEventList.results,
    members: membersList.results as { id: string; name: string }[],
    user_id: context.data.current_user.id as string,
  };
}

export default function () {
  const {
    can_approve,
    events,
    members,
    user_id,
  }: {
    can_approve: boolean;
    events: { [k: string]: any }[];
    members: { id: string; name: string }[];
    user_id: string;
  } = useLoaderData<typeof loader>();
  const [eventData, setEventData] = useState(events);
  const { isOpen, onClose, onOpen } = useDisclosure();
  const {
    isOpen: isCompleteOpen,
    onClose: closeComplete,
    onOpen: openComplete,
  } = useDisclosure();
  const {
    isOpen: isAnsweredOpen,
    onClose: closeAnswered,
    onOpen: openAnswered,
  } = useDisclosure();
  const {
    isOpen: isForgottenOpen,
    onClose: onForgottenClose,
    onOpen: onForgottenOpen,
  } = useDisclosure();
  const {
    isOpen: isDeleteOpen,
    onClose: onDeleteClose,
    onOpen: onDeleteOpen,
  } = useDisclosure();
  const {
    isOpen: isRescheduleOpen,
    onClose: onRescheduleClose,
    onOpen: onRescheduleOpen,
  } = useDisclosure();
  const toast = useToast();
  const [selectedEvent, setSelectedEvent] = useState("");
  const [showOld, setShowOld] = useState(false);

  async function decide(approved: boolean, eventId: string) {
    const decisionResp = await fetch(
      `/api/events-team/events/${eventId}/decision`,
      {
        body: JSON.stringify({ approved }),
        headers: {
          "content-type": "application/json",
        },
        method: "POST",
      },
    );

    if (!decisionResp.ok) {
      let errorMsg = "Unknown error";

      try {
        errorMsg = ((await decisionResp.json()) as { error: string }).error;
      } catch {}

      toast({
        description: errorMsg,
        status: "error",
        title: "Oops!",
      });

      return;
    }

    toast({
      description: `Event ${approved ? "approved" : "rejected"}`,
      status: "success",
      title: "Success",
    });

    const newEventData = eventData;
    const eventIdx = eventData.findIndex((e) => e.id === eventId);

    newEventData[eventIdx].approved = approved;
    newEventData[eventIdx].pending = false;

    setEventData([...newEventData]);
  }

  async function certify(eventId: string) {
    const certifyResp = await fetch(
      `/api/events-team/events/${eventId}/certify`,
      {
        body: "{}",
        headers: {
          "content-type": "application/json",
        },
        method: "POST",
      },
    );

    if (!certifyResp.ok) {
      let errorMsg = "Unknown error";

      try {
        errorMsg = ((await certifyResp.json()) as { error: string }).error;
      } catch {}

      toast({
        description: errorMsg,
        status: "error",
        title: "Failed to certify game night",
      });

      return;
    }

    toast({
      description: "Game night certified",
      status: "success",
      title: "Success",
    });

    const newEventData = eventData;
    newEventData[
      eventData.findIndex((e) => e.id === eventId)
    ].reached_minimum_player_count = true;

    setEventData([...newEventData]);
    setSelectedEvent("");
  }

  async function markAnswered(eventId: string) {
    const answerResp = await fetch(`/api/events-team/events/${eventId}/solve`, {
      body: "{}",
      headers: {
        "content-type": "application/json",
      },
      method: "POST",
    });

    closeAnswered();

    if (!answerResp.ok) {
      toast({
        description: "Failed to mark as solved",
        status: "error",
        title: "Oops",
      });

      return;
    }

    const newEventData = eventData;
    newEventData[eventData.findIndex((e) => e.id === eventId)].answered_at =
      Date.now();

    setEventData([...newEventData]);
    setSelectedEvent("");
  }

  async function markComplete(eventId: string) {
    const completeResp = await fetch(
      `/api/events-team/events/${eventId}/complete`,
      {
        body: "{}",
        headers: {
          "content-type": "application/json",
        },
        method: "POST",
      },
    );

    closeComplete();

    if (!completeResp.ok) {
      let msg = "Unknown error";

      try {
        msg = ((await completeResp.json()) as { error: string }).error;
      } catch {}

      toast({
        description: msg,
        status: "error",
        title: "Failed to complete",
      });

      return;
    }

    toast({
      description: "Event marked as completed",
      status: "success",
      title: "Success",
    });

    const newEventData = eventData;

    // Technically this won't be the same as the time in the db, but that doesn't matter since this is just to hide the button
    newEventData[eventData.findIndex((e) => e.id === eventId)].performed_at =
      Date.now();

    setEventData([...newEventData]);
    setSelectedEvent("");
  }

  async function markForgotten(eventId: string) {
    const forgottenResp = await fetch(
      `/api/events-team/events/${eventId}/forgotten`,
      {
        body: "{}",
        headers: {
          "content-type": "application/json",
        },
        method: "POST",
      },
    );

    onForgottenClose();

    if (!forgottenResp.ok) {
      let msg = "Unknown error";

      try {
        msg = ((await forgottenResp.json()) as { error: string }).error;
      } catch {}

      toast({
        description: msg,
        status: "error",
        title: "Failed to forget",
      });

      return;
    }

    const newEventData = eventData;

    newEventData[eventData.findIndex((e) => e.id === eventId)].performed_at = 0;
    setEventData([...newEventData]);
    setSelectedEvent("");
  }

  async function deleteEvent(eventId: string) {
    const deleteResp = await fetch(`/api/events-team/events/${eventId}`, {
      method: "DELETE",
    });

    onDeleteClose();

    if (!deleteResp.ok) {
      let msg = "Unknown error";

      try {
        msg = ((await deleteResp.json()) as { error: string }).error;
      } catch {}

      toast({
        description: msg,
        status: "error",
        title: "Failed to delete",
      });

      return;
    }

    setEventData(eventData.filter((e) => e.id !== eventId));
    setSelectedEvent("");
  }

  async function reschedule(eventId: string) {
    const newDate = (
      document.getElementById("reschedule-input") as HTMLInputElement
    ).value;
    const day = newDate.split("-").at(2);
    const rescheduleResp = await fetch(`/api/events-team/events/${eventId}`, {
      body: JSON.stringify({ day }),
      headers: {
        "content-type": "application/json",
      },
      method: "PATCH",
    });

    if (!rescheduleResp.ok) {
      let msg = "Unknown error";

      try {
        msg = ((await rescheduleResp.json()) as { error: string }).error;
      } catch {}

      toast({
        description: msg,
        status: "error",
        title: "Failed to reschedule",
      });

      return;
    }

    const newEventData = eventData;
    newEventData[eventData.findIndex((e) => e.id === eventId)].day = day;

    setEventData([...newEventData]);
    setSelectedEvent("");
    onRescheduleClose();
    toast({
      description: `Event rescheduled to ${newDate}`,
      status: "success",
      title: "Rescheduled",
    });
  }

  return (
    <Container maxW="container.lg">
      <Modal isOpen={isOpen} onClose={onClose}>
        <ModalOverlay />
        <ModalContent>
          <ModalHeader>Certify Game Night</ModalHeader>
          <ModalCloseButton />
          <ModalBody>
            <Text>
              By certifying this game night, you confirm that the minimum number
              of players was met and you were provided proof.
            </Text>
          </ModalBody>
          <ModalFooter>
            <Button colorScheme="red" onClick={onClose}>
              Cancel
            </Button>
            <Button
              colorScheme="blue"
              ml="8px"
              onClick={async () => {
                await certify(selectedEvent);
                onClose();
              }}
            >
              Certify
            </Button>
          </ModalFooter>
        </ModalContent>
      </Modal>
      <Modal isOpen={isCompleteOpen} onClose={closeComplete}>
        <ModalOverlay />
        <ModalContent>
          <ModalHeader>Mark as Completed</ModalHeader>
          <ModalCloseButton />
          <ModalBody>
            <Text>
              By marking this event as completed, you confirm that the event
              creator has performed this event
            </Text>
          </ModalBody>
          <ModalFooter>
            <Button onClick={closeComplete}>Cancel</Button>
            <Button
              colorScheme="blue"
              ml="8px"
              onClick={async () => await markComplete(selectedEvent)}
            >
              Mark as Complete
            </Button>
          </ModalFooter>
        </ModalContent>
      </Modal>
      <Modal isOpen={isAnsweredOpen} onClose={closeAnswered}>
        <ModalOverlay />
        <ModalContent>
          <ModalHeader>Mark as Solved</ModalHeader>
          <ModalCloseButton />
          <ModalBody>
            <Text>Are you sure you want to mark this riddle as solved?</Text>
          </ModalBody>
          <ModalFooter>
            <Button onClick={closeAnswered}>Cancel</Button>
            <Button
              colorScheme="blue"
              ml="8px"
              onClick={async () => await markAnswered(selectedEvent)}
            >
              Mark Answered
            </Button>
          </ModalFooter>
        </ModalContent>
      </Modal>
      <Modal isOpen={isForgottenOpen} onClose={onForgottenClose}>
        <ModalOverlay />
        <ModalContent>
          <ModalHeader>Mark as Forgotten</ModalHeader>
          <ModalCloseButton />
          <ModalBody>
            Are you sure you want to mark this event as forgotten? The creator
            will be given a 5 point penalty.
          </ModalBody>
          <ModalFooter>
            <Button onClick={onForgottenClose}>Cancel</Button>
            <Button
              colorScheme="blue"
              ml="8px"
              onClick={async () => await markForgotten(selectedEvent)}
            >
              Mark Forgotten
            </Button>
          </ModalFooter>
        </ModalContent>
      </Modal>
      <Modal isOpen={isDeleteOpen} onClose={onDeleteClose}>
        <ModalOverlay />
        <ModalContent>
          <ModalHeader>Delete Event?</ModalHeader>
          <ModalCloseButton />
          <ModalBody>
            You are about to permanently delete this event. Are you sure you
            want to continue?
          </ModalBody>
          <ModalFooter>
            <Button onClick={onDeleteClose}>Cancel</Button>
            <Button
              colorScheme="red"
              ml="8px"
              onClick={async () => await deleteEvent(selectedEvent)}
            >
              Delete
            </Button>
          </ModalFooter>
        </ModalContent>
      </Modal>
      <Modal isOpen={isRescheduleOpen} onClose={onRescheduleClose}>
        <ModalOverlay />
        <ModalContent>
          <ModalHeader>Reschedule Event</ModalHeader>
          <ModalCloseButton />
          <ModalBody>
            <Text>
              New date:
              <input
                id="reschedule-input"
                type="date"
                style={{ marginLeft: "8px" }}
                min={new Date().toISOString().split("T").at(0)}
                max={(function () {
                  const date = new Date();

                  date.setUTCMonth(date.getUTCMonth() + 1, 0);

                  return date.toISOString().split("T").at(0);
                })()}
              />
            </Text>
          </ModalBody>
          <ModalFooter>
            <Button onClick={onRescheduleClose}>Cancel</Button>
            <Button
              colorScheme="blue"
              ml="8px"
              onClick={async () => await reschedule(selectedEvent)}
            >
              Reschedule
            </Button>
          </ModalFooter>
        </ModalContent>
      </Modal>
      <VStack spacing="8">
        {eventData
          .map((event) => {
            if (!showOld && event.day < new Date().getUTCDate()) return;

            const eventCreatorName = members.find(
              (member) => member.id === event.created_by,
            )?.name;

            const eventColors: { [k: string]: string } = {
              fotd: "cyan",
              gamenight: "blue",
              rotw: "magenta",
              qotd: "#9900FF",
            };

            return (
              <Card
                borderColor={eventColors[event.type]}
                borderWidth="2px"
                w="100%"
              >
                <CardBody>
                  <Stack divider={<StackDivider />} spacing="4">
                    <Box>
                      <Heading size="sm">Date</Heading>
                      <Text fontSize="sm" pt="2">
                        {event.year}-{event.month}-{event.day}
                        <IconButton
                          aria-label="Edit event date"
                          display={
                            (event.created_by === user_id &&
                              event.day > new Date().getUTCDate()) ||
                            can_approve
                              ? undefined
                              : "none"
                          }
                          icon={
                            <svg
                              xmlns="http://www.w3.org/2000/svg"
                              width="16"
                              height="16"
                              fill="currentColor"
                              viewBox="0 0 16 16"
                            >
                              <path d="M15.502 1.94a.5.5 0 0 1 0 .706L14.459 3.69l-2-2L13.502.646a.5.5 0 0 1 .707 0l1.293 1.293zm-1.75 2.456-2-2L4.939 9.21a.5.5 0 0 0-.121.196l-.805 2.414a.25.25 0 0 0 .316.316l2.414-.805a.5.5 0 0 0 .196-.12l6.813-6.814z" />
                              <path
                                fill-rule="evenodd"
                                d="M1 13.5A1.5 1.5 0 0 0 2.5 15h11a1.5 1.5 0 0 0 1.5-1.5v-6a.5.5 0 0 0-1 0v6a.5.5 0 0 1-.5.5h-11a.5.5 0 0 1-.5-.5v-11a.5.5 0 0 1 .5-.5H9a.5.5 0 0 0 0-1H2.5A1.5 1.5 0 0 0 1 2.5z"
                              />
                            </svg>
                          }
                          ml="8px"
                          onClick={() => {
                            setSelectedEvent(event.id);
                            onRescheduleOpen();
                          }}
                        />
                      </Text>
                    </Box>
                    <Box>
                      <Heading size="sm">Event Type</Heading>
                      <Text fontSize="sm" pt="2">
                        {event.type.toUpperCase()}
                      </Text>
                    </Box>
                    <Box>
                      <Heading size="sm">Event Details</Heading>
                      <Text fontSize="sm" pt="2">
                        {event.details}
                      </Text>
                    </Box>
                    {event.type === "rotw" ? (
                      <Box>
                        <Heading size="sm">Riddle Answer</Heading>
                        <Text fontSize="sm" pt="2">
                          {event.answer}
                        </Text>
                      </Box>
                    ) : null}
                    <Box>
                      <Heading size="sm">Host</Heading>
                      <Text fontSize="sm" pt="2">
                        {eventCreatorName
                          ? `${eventCreatorName} (${event.created_by})`
                          : event.created_by}
                      </Text>
                    </Box>
                  </Stack>
                </CardBody>
                <CardFooter>
                  <Flex gap="8px" mr="8px">
                    {can_approve && event.pending ? (
                      <>
                        <Button
                          colorScheme="red"
                          onClick={async () => await decide(false, event.id)}
                        >
                          Reject
                        </Button>
                        <Button
                          colorScheme="blue"
                          onClick={async () => await decide(true, event.id)}
                        >
                          Approve
                        </Button>
                      </>
                    ) : null}
                    {can_approve &&
                    !event.pending &&
                    typeof event.performed_at !== "number" ? (
                      <>
                        <Button
                          colorScheme="blue"
                          onClick={() => {
                            setSelectedEvent(event.id);
                            openComplete();
                          }}
                        >
                          Mark as Completed
                        </Button>
                        <Button
                          colorScheme="red"
                          onClick={() => {
                            setSelectedEvent(event.id);
                            onForgottenOpen();
                          }}
                        >
                          Mark as Forgotten
                        </Button>
                      </>
                    ) : null}
                    {can_approve &&
                    !event.pending &&
                    event.approved &&
                    event.performed_at &&
                    event.type === "rotw" &&
                    !event.answered_at ? (
                      <Button
                        colorScheme="blue"
                        onClick={() => {
                          setSelectedEvent(event.id);
                          openAnswered();
                        }}
                      >
                        Mark as Solved
                      </Button>
                    ) : null}
                    {can_approve &&
                    event.approved &&
                    event.type === "gamenight" &&
                    event.performed_at &&
                    !event.reached_minimum_player_count ? (
                      <Button
                        colorScheme="blue"
                        onClick={() => {
                          setSelectedEvent(event.id);
                          onOpen();
                        }}
                      >
                        Certify Game Night
                      </Button>
                    ) : null}
                  </Flex>
                  <Text alignSelf="center" fontSize="sm">
                    Status:{" "}
                    {event.pending
                      ? "Pending"
                      : event.approved
                        ? event.performed_at
                          ? "Completed"
                          : "Approved"
                        : "Denied"}
                  </Text>
                  <IconButton
                    alignSelf="center"
                    aria-label="Delete event"
                    display={
                      (event.created_by === user_id &&
                        event.day > new Date().getUTCDate()) ||
                      can_approve
                        ? undefined
                        : "none"
                    }
                    icon={
                      <svg
                        xmlns="http://www.w3.org/2000/svg"
                        width="32"
                        height="32"
                        fill="currentColor"
                        viewBox="0 0 16 16"
                      >
                        <path d="M2.5 1a1 1 0 0 0-1 1v1a1 1 0 0 0 1 1H3v9a2 2 0 0 0 2 2h6a2 2 0 0 0 2-2V4h.5a1 1 0 0 0 1-1V2a1 1 0 0 0-1-1H10a1 1 0 0 0-1-1H7a1 1 0 0 0-1 1zm3 4a.5.5 0 0 1 .5.5v7a.5.5 0 0 1-1 0v-7a.5.5 0 0 1 .5-.5M8 5a.5.5 0 0 1 .5.5v7a.5.5 0 0 1-1 0v-7A.5.5 0 0 1 8 5m3 .5v7a.5.5 0 0 1-1 0v-7a.5.5 0 0 1 1 0" />
                      </svg>
                    }
                    marginLeft="auto"
                    marginRight={0}
                    onClick={() => {
                      setSelectedEvent(event.id);
                      onDeleteOpen();
                    }}
                  />
                </CardFooter>
              </Card>
            );
          })
          .filter((e) => e)}
      </VStack>
      <VStack alignItems="start" gap="8px" my="16px">
        <FormControl>
          <FormLabel htmlFor="show-old-events" mb="0">
            Show old events
          </FormLabel>
          <Switch
            id="show-old-events"
            onChange={(e) => {
              setShowOld(e.target.checked);
              setEventData([...eventData]);
            }}
          />
        </FormControl>
        <Link color="#646cff" href="/book-event" mt="16px" target="_blank">
          Book an Event
        </Link>
        <Link
          color="#646cff"
          href="/events-team/historical"
          mt="8px"
          target="_blank"
        >
          Historical Events
        </Link>
        {can_approve ? (
          <>
            <Link color="#646cff" href="/events-team/outstanding" mt="8px">
              Outstanding Events from Last Month
            </Link>
            <Link color="#646cff" href="/et-members" mb="32px" mt="8px">
              Events Team Member Management
            </Link>
          </>
        ) : null}
      </VStack>
    </Container>
  );
}