"use client";

import {
  Box,
  VStack,
  HStack,
  Text,
  Button,
  Spinner,
  Badge,
  Icon,
  Flex,
} from "@chakra-ui/react";
import React from "react";
import { FaUsers, FaClock, FaCalendarAlt, FaPlus } from "react-icons/fa";
import { LuX } from "react-icons/lu";
import type { components } from "../reflector-api";
import {
  useRoomActiveMeetings,
  useRoomUpcomingMeetings,
  useRoomJoinMeeting,
  useMeetingDeactivate,
  useRoomGetByName,
} from "../lib/apiHooks";
import { useRouter } from "next/navigation";
import Link from "next/link";

type Meeting = components["schemas"]["Meeting"];
type CalendarEventResponse = components["schemas"]["CalendarEventResponse"];

interface MeetingSelectionProps {
  roomName: string;
  isOwner: boolean;
  isSharedRoom: boolean;
  onMeetingSelect: (meeting: Meeting) => void;
  onCreateUnscheduled: () => void;
}

const formatDateTime = (date: string | Date) => {
  const d = new Date(date);
  return d.toLocaleString("en-US", {
    month: "short",
    day: "numeric",
    hour: "2-digit",
    minute: "2-digit",
  });
};

const formatCountdown = (startTime: string | Date) => {
  const now = new Date();
  const start = new Date(startTime);
  const diff = start.getTime() - now.getTime();

  if (diff <= 0) return "Starting now";

  const minutes = Math.floor(diff / 60000);
  const hours = Math.floor(minutes / 60);

  if (hours > 0) {
    return `Starts in ${hours}h ${minutes % 60}m`;
  }
  return `Starts in ${minutes} minutes`;
};

export default function MeetingSelection({
  roomName,
  isOwner,
  isSharedRoom,
  onMeetingSelect,
  onCreateUnscheduled,
}: MeetingSelectionProps) {
  const router = useRouter();

  // Use React Query hooks for data fetching
  const roomQuery = useRoomGetByName(roomName);
  const activeMeetingsQuery = useRoomActiveMeetings(roomName);
  const upcomingMeetingsQuery = useRoomUpcomingMeetings(roomName);
  const joinMeetingMutation = useRoomJoinMeeting();
  const deactivateMeetingMutation = useMeetingDeactivate();

  const room = roomQuery.data;

  const activeMeetings = activeMeetingsQuery.data || [];
  const upcomingEvents = upcomingMeetingsQuery.data || [];
  const loading =
    roomQuery.isLoading ||
    activeMeetingsQuery.isLoading ||
    upcomingMeetingsQuery.isLoading;
  const error =
    roomQuery.error || activeMeetingsQuery.error || upcomingMeetingsQuery.error;

  const handleJoinMeeting = async (meetingId: string) => {
    try {
      const meeting = await joinMeetingMutation.mutateAsync({
        params: {
          path: {
            room_name: roomName,
            meeting_id: meetingId,
          },
        },
      });
      onMeetingSelect(meeting);
    } catch (err) {
      console.error("Failed to join meeting:", err);
      // Handle error appropriately since we don't have setError anymore
    }
  };

  const handleJoinUpcoming = (event: CalendarEventResponse) => {
    // Navigate to waiting page with event info
    router.push(`/${roomName}/wait/${event.id}`);
  };

  const handleEndMeeting = async (meetingId: string) => {
    try {
      await deactivateMeetingMutation.mutateAsync({
        params: {
          path: {
            meeting_id: meetingId,
          },
        },
      });
    } catch (err) {
      console.error("Failed to end meeting:", err);
    }
  };

  if (loading) {
    return (
      <Box p={8} textAlign="center">
        <Spinner size="lg" color="blue.500" />
        <Text mt={4}>Loading meetings...</Text>
      </Box>
    );
  }

  if (error) {
    return (
      <Box
        p={4}
        borderRadius="md"
        bg="red.50"
        borderLeft="4px solid"
        borderColor="red.400"
      >
        <Text fontWeight="semibold" color="red.800">
          Error
        </Text>
        <Text color="red.700">{"Failed to load meetings"}</Text>
      </Box>
    );
  }

  // Generate display name for room
  const displayName = room?.display_name || room?.name || roomName;
  const roomTitle =
    displayName.endsWith("'s") || displayName.endsWith("s")
      ? `${displayName} Room`
      : `${displayName}'s Room`;

  return (
    <Flex
      flexDir="column"
      w={{ base: "full", md: "container.xl" }}
      mx="auto"
      px={6}
      py={8}
      minH="100vh"
    >
      <Flex
        flexDir="row"
        justifyContent="space-between"
        alignItems="center"
        mb={6}
      >
        <Text fontSize="lg" fontWeight="semibold">
          {displayName}'s room
        </Text>
      </Flex>

      {/* Active Meetings */}
      {activeMeetings.length > 0 && (
        <VStack align="stretch" gap={4} mb={6}>
          <Text fontSize="md" fontWeight="semibold" color="gray.700">
            Active Meetings
          </Text>
          {activeMeetings.map((meeting) => (
            <Box
              key={meeting.id}
              width="100%"
              bg="white"
              border="1px solid"
              borderColor="gray.200"
              borderRadius="md"
              p={4}
              _hover={{ borderColor: "gray.300" }}
            >
              <HStack justify="space-between" align="start">
                <VStack align="start" gap={2} flex={1}>
                  <HStack>
                    <Icon as={FaCalendarAlt} color="blue.500" />
                    <Text fontWeight="semibold">
                      {(meeting.calendar_metadata as any)?.title || "Meeting"}
                    </Text>
                  </HStack>

                  {isOwner &&
                    (meeting.calendar_metadata as any)?.description && (
                      <Text fontSize="sm" color="gray.600">
                        {(meeting.calendar_metadata as any).description}
                      </Text>
                    )}

                  <HStack gap={4} fontSize="sm" color="gray.500">
                    <HStack>
                      <Icon as={FaUsers} />
                      <Text>{meeting.num_clients} participants</Text>
                    </HStack>
                    <HStack>
                      <Icon as={FaClock} />
                      <Text>Started {formatDateTime(meeting.start_date)}</Text>
                    </HStack>
                  </HStack>

                  {isOwner && (meeting.calendar_metadata as any)?.attendees && (
                    <HStack gap={2} flexWrap="wrap">
                      {(meeting.calendar_metadata as any).attendees
                        .slice(0, 3)
                        .map((attendee: any, idx: number) => (
                          <Badge key={idx} colorScheme="green" fontSize="xs">
                            {attendee.name || attendee.email}
                          </Badge>
                        ))}
                      {(meeting.calendar_metadata as any).attendees.length >
                        3 && (
                        <Badge colorScheme="gray" fontSize="xs">
                          +
                          {(meeting.calendar_metadata as any).attendees.length -
                            3}{" "}
                          more
                        </Badge>
                      )}
                    </HStack>
                  )}
                </VStack>

                <HStack gap={2}>
                  <Button
                    colorScheme="blue"
                    size="md"
                    onClick={() => handleJoinMeeting(meeting.id)}
                  >
                    Join Now
                  </Button>
                  {isOwner && (
                    <Button
                      variant="outline"
                      colorScheme="red"
                      size="md"
                      onClick={() => handleEndMeeting(meeting.id)}
                      isLoading={deactivateMeetingMutation.isPending}
                    >
                      <Icon as={LuX} />
                      End Meeting
                    </Button>
                  )}
                </HStack>
              </HStack>
            </Box>
          ))}
        </VStack>
      )}

      {/* Upcoming Meetings */}
      {upcomingEvents.length > 0 && (
        <VStack align="stretch" gap={4} mb={6}>
          <Text fontSize="md" fontWeight="semibold" color="gray.700">
            Upcoming Meetings
          </Text>
          {upcomingEvents.map((event) => (
            <Box
              key={event.id}
              width="100%"
              bg="white"
              border="1px solid"
              borderColor="gray.200"
              borderRadius="md"
              p={4}
              _hover={{ borderColor: "gray.300" }}
            >
              <HStack justify="space-between" align="start">
                <VStack align="start" gap={2} flex={1}>
                  <HStack>
                    <Icon as={FaCalendarAlt} color="orange.500" />
                    <Text fontWeight="semibold">
                      {event.title || "Scheduled Meeting"}
                    </Text>
                    <Badge colorScheme="orange" fontSize="xs">
                      {formatCountdown(event.start_time)}
                    </Badge>
                  </HStack>

                  {isOwner && event.description && (
                    <Text fontSize="sm" color="gray.600">
                      {event.description}
                    </Text>
                  )}

                  <HStack gap={4} fontSize="sm" color="gray.500">
                    <Text>
                      {formatDateTime(event.start_time)} -{" "}
                      {formatDateTime(event.end_time)}
                    </Text>
                  </HStack>

                  {isOwner && event.attendees && (
                    <HStack gap={2} flexWrap="wrap">
                      {event.attendees
                        .slice(0, 3)
                        .map((attendee: any, idx: number) => (
                          <Badge key={idx} colorScheme="purple" fontSize="xs">
                            {attendee.name || attendee.email}
                          </Badge>
                        ))}
                      {event.attendees.length > 3 && (
                        <Badge colorScheme="gray" fontSize="xs">
                          +{event.attendees.length - 3} more
                        </Badge>
                      )}
                    </HStack>
                  )}
                </VStack>

                <Button
                  variant="outline"
                  colorScheme="orange"
                  size="md"
                  onClick={() => handleJoinUpcoming(event)}
                >
                  Join Early
                </Button>
              </HStack>
            </Box>
          ))}
        </VStack>
      )}

      {/* Create Unscheduled Meeting - Only for room owners or shared rooms */}
      {(isOwner || isSharedRoom) && (
        <Box width="100%" bg="gray.50" borderRadius="md" p={4} mt={6}>
          <HStack justify="space-between" align="center">
            <VStack align="start" gap={1}>
              <Text fontWeight="semibold">Start a Quick Meeting</Text>
              <Text fontSize="sm" color="gray.600">
                Jump into a meeting room right away
              </Text>
            </VStack>
            <Button colorScheme="green" onClick={onCreateUnscheduled}>
              Create Meeting
            </Button>
          </HStack>
        </Box>
      )}

      {/* Message for non-owners of private rooms */}
      {!isOwner && !isSharedRoom && (
        <Box
          width="100%"
          bg="gray.50"
          border="1px solid"
          borderColor="gray.200"
          borderRadius="md"
          p={4}
          mt={6}
        >
          <Text fontSize="sm" color="gray.600" textAlign="center">
            Only the room owner can create unscheduled meetings in this private
            room.
          </Text>
        </Box>
      )}

      {/* Footer with back to reflector link */}
      <Box mt="auto" pt={8} borderTop="1px solid" borderColor="gray.100">
        <Text textAlign="center" fontSize="sm" color="gray.500">
          <Link href="/browse">← Back to Reflector</Link>
        </Text>
      </Box>
    </Flex>
  );
}