import {
  InfoCircleOutlined,
  MessageOutlined,
  ShrinkOutlined,
  SyncOutlined,
} from "@ant-design/icons";
import { useLazyQuery, useSubscription } from "@apollo/client";
import { Badge, Card, Col, Row, Space, Tag, Tooltip, Typography } from "antd";
import React, { useCallback, useEffect, useState } from "react";
import { useTranslation } from "react-i18next";
import { connect } from "react-redux";
import { createStructuredSelector } from "reselect";
import {
  CONVERSATION_LIST_QUERY,
  CONVERSATION_LIST_SUBSCRIPTION,
  UNREAD_CONVERSATION_COUNT_SUBSCRIPTION,
} from "../../graphql/conversations.queries";
import { toggleChatVisible } from "../../redux/messaging/messaging.actions";
import {
  selectChatVisible,
  selectSelectedConversation,
} from "../../redux/messaging/messaging.selectors";
import ChatConversationListComponent from "../chat-conversation-list/chat-conversation-list.component";
import ChatConversationContainer from "../chat-conversation/chat-conversation.container";
import ChatNewConversation from "../chat-new-conversation/chat-new-conversation.component";
import LoadingSpinner from "../loading-spinner/loading-spinner.component";
import "./chat-popup.styles.scss";

const mapStateToProps = createStructuredSelector({
  selectedConversation: selectSelectedConversation,
  chatVisible: selectChatVisible,
});
const mapDispatchToProps = (dispatch) => ({
  toggleChatVisible: () => dispatch(toggleChatVisible()),
});

export function ChatPopupComponent({
  chatVisible,
  selectedConversation,
  toggleChatVisible,
}) {
  const { t } = useTranslation();
  const [pollInterval, setpollInterval] = useState(0);

  const { data: unreadData } = useSubscription(
    UNREAD_CONVERSATION_COUNT_SUBSCRIPTION
  );

  const [
    getConversations,
    { loading, data, called, refetch, fetchMore, subscribeToMore },
  ] = useLazyQuery(CONVERSATION_LIST_QUERY, {
    fetchPolicy: "network-only",
    nextFetchPolicy: "network-only",
    skip: !chatVisible,
  });

  const fcmToken = sessionStorage.getItem("fcmtoken");

  useEffect(() => {
    if (fcmToken) {
      setpollInterval(0);
    } else {
      setpollInterval(60000);
    }
  }, [fcmToken]);

  useEffect(() => {
    if (called && chatVisible)
      getConversations({
        variables: {
          offset: 0,
        },
      });
  }, [chatVisible, called, getConversations]);

  const loadMoreConversations = useCallback(() => {
    if (data)
      fetchMore({
        variables: {
          offset: data.conversations.length,
        },
      });
  }, [data, fetchMore]);

  const unreadCount = unreadData?.messages_aggregate.aggregate.count || 0;

  return (
    <Badge count={unreadCount}>
      <Card size="small">
        {chatVisible ? (
          <div className="chat-popup">
            <Space align="center">
              <Typography.Title level={4}>
                {t("messaging.labels.messaging")}
              </Typography.Title>
              <ChatNewConversation />
              <Tooltip title={t("messaging.labels.recentonly")}>
                <InfoCircleOutlined />
              </Tooltip>
              <SyncOutlined
                style={{ cursor: "pointer" }}
                onClick={() => refetch()}
              />
              {pollInterval > 0 && (
                <Tag color="yellow">{t("messaging.labels.nopush")}</Tag>
              )}
            </Space>
            <ShrinkOutlined
              onClick={() => toggleChatVisible()}
              style={{ position: "absolute", right: ".5rem", top: ".5rem" }}
            />

            <Row gutter={[8, 8]} className="chat-popup-content">
              <Col span={8}>
                {loading ? (
                  <LoadingSpinner />
                ) : (
                  <ChatConversationListComponent
                    conversationList={data ? data.conversations : []}
                    loadMoreConversations={loadMoreConversations}
                    subscribeToMoreConversations={() =>
                      subscribeToMore({
                        document: CONVERSATION_LIST_SUBSCRIPTION,
                        variables: { offset: 0 },
                        updateQuery: (prev, { subscriptionData }) => {
                          if (
                            !subscriptionData.data ||
                            subscriptionData.data.conversations.length === 0
                          )
                            return prev;

                          let conversations = [...prev.conversations];
                          const newConversations =
                            subscriptionData.data.conversations;

                          for (const conversation of newConversations) {
                            const index = conversations.findIndex(
                              (prevConversation) =>
                                prevConversation.id === conversation.id
                            );

                            if (index !== -1) {
                              conversations.splice(index, 1);
                              conversations.unshift(conversation);

                              continue;
                            }

                            conversations.unshift(conversation);
                          }

                          return Object.assign({}, prev, {
                            conversations: conversations,
                          });
                        },
                      })
                    }
                  />
                )}
              </Col>
              <Col span={16}>
                {selectedConversation ? <ChatConversationContainer /> : null}
              </Col>
            </Row>
          </div>
        ) : (
          <div
            onClick={() => toggleChatVisible()}
            style={{ cursor: "pointer" }}
          >
            <MessageOutlined />
            <strong>{t("messaging.labels.messaging")}</strong>
          </div>
        )}
      </Card>
    </Badge>
  );
}
export default connect(mapStateToProps, mapDispatchToProps)(ChatPopupComponent);