/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import React, {
  FC, useCallback, useEffect, useState,
} from 'react';
import axios from 'axios';
import {
  Flex,
  Text,
  Table,
  Thead,
  Tbody,
  Tr,
  Th,
  Td,
  TableContainer,
  TableCaption,
  Tag,
  Spinner,
} from '@chakra-ui/react';
import moment from 'moment';
import { WorkflowInstanceType } from '../types';
import {
  WorkflowIntanceStatusMap,
  WorkflowIntanceStatusColorMap,
} from '../constant';

const ApiRoot = process.env.NEXT_PUBLIC_WORKFLOW_API_ROOT;

const Instances: FC<{ workflowId: string }> = ({ workflowId }) => {
  const [isLoading, setIsLoading] = useState(true);
  const [instances, setInstances] = useState<WorkflowInstanceType[]>([]);
  const [total, setTotal] = useState(0);
  const [pageIndex, setPageIndex] = useState(1);
  const pageSize = 10;

  const getWorkflows = useCallback(async () => {
    setIsLoading(true);
    try {
      const reqParams: {
        page: number;
        size: number;
        workflow_id?: string;
      } = {
        page: pageIndex,
        size: pageSize,
        workflow_id: workflowId,
      };

      const { data } = await axios.get<{
        total: number;
        workflow_instances: WorkflowInstanceType[];
      }>(`${ApiRoot}/workflow/instances`, {
        params: reqParams,
      });
      setInstances([...instances, ...(data?.workflow_instances ?? [])]);
      setTotal(data.total);
      setIsLoading(false);
    } catch (error) {
      setIsLoading(false);
    }
  }, [workflowId, pageIndex, pageSize]);

  useEffect(() => {
    const controller = new AbortController();
    getWorkflows();
    return () => {
      controller.abort();
    };
  }, [workflowId, pageIndex, pageSize]);

  return (
    <TableContainer>
      <Table variant="simple">
        <Thead>
          <Tr>
            <Th>Instance ID</Th>
            <Th>Status</Th>
            <Th>Updated at</Th>
            <Th>Created At</Th>
          </Tr>
        </Thead>
        <Tbody>
          {instances.map((workflow) => (
            <Tr key={workflow.workflow_instance_id}>
              <Td>{workflow.workflow_instance_id}</Td>
              <Td>
                <Tag
                  size="sm"
                  colorScheme={WorkflowIntanceStatusColorMap.get(
                    workflow.workflow_status,
                  )}
                  variant="outline"
                >
                  {WorkflowIntanceStatusMap.get(workflow.workflow_status)}
                </Tag>
              </Td>
              <Td>
                {moment(workflow.update_time).format('YYYY-MM-DD HH:mm:ss')}
              </Td>
              <Td>
                {moment(workflow.create_time).format('YYYY-MM-DD HH:mm:ss')}
              </Td>
            </Tr>
          ))}
        </Tbody>

        {instances.length === 0 && (
          <TableCaption>
            <Text variant="xs" color="#909090">
              empty
            </Text>
          </TableCaption>
        )}

        {instances.length > 0 && (
        <TableCaption>
          <Flex alignItems="center">
            <Text fontSize="sx">
              {`${instances.length} of ${total}  intance${
                total > 1 ? 's' : ''
              } in list `}
            </Text>
            {isLoading ? (
              <Spinner ml={2} size="sm" colorScheme="blue" />
            ) : (
              instances.length < total && (
              <Text
                color={instances.length < total ? '#3182ce' : ''}
                ml="2"
                cursor="pointer"
                as="u"
                onClick={() => setPageIndex(pageIndex + 1)}
              >
                Load More
              </Text>
              )
            )}
          </Flex>
        </TableCaption>
        )}
      </Table>
    </TableContainer>
  );
};

export default Instances;