import { FC, useMemo, useRef } from 'react';

import Divider from '../Divider';
import FlexBox from '../FlexBox';
import List, { ListForwardedRefContent } from '../List';
import MessageBox from '../MessageBox';
import { ExpandablePanel } from '../Panels';
import { BodyText } from '../Text';
import useProtect from '../../hooks/useProtect';
import useProtectedState from '../../hooks/useProtectedState';

type ChangedSSHKeys = {
  [hostUUID: string]: {
    hostName: string;
    hostUUID: string;
    ipAddress: string;
    isChecked?: boolean;
  };
};

const ManageChangedSSHKeysForm: FC = () => {
  const { protect } = useProtect();

  const listRef = useRef<ListForwardedRefContent>({});

  const [changedSSHKeys, setChangedSSHKeys] = useProtectedState<ChangedSSHKeys>(
    {},
    protect,
  );

  const isAllowCheckAll = useMemo(
    () => Object.keys(changedSSHKeys).length > 1,
    [changedSSHKeys],
  );

  return (
    <ExpandablePanel header={<BodyText>Manage changed SSH keys</BodyText>}>
      <FlexBox spacing=".2em">
        <BodyText>
          The identity of the following targets have unexpectedly changed.
        </BodyText>
        <MessageBox type="warning" isAllowClose>
          If you haven&apos;t rebuilt the listed targets, then you could be
          experiencing a &quot;Man In The Middle&quot; attack. Please verify the
          targets have changed for a known reason before proceeding to remove
          the broken keys.
        </MessageBox>
        <List
          header={
            <FlexBox
              row
              spacing=".3em"
              sx={{
                width: '100%',

                '& > :not(:last-child)': {
                  display: { xs: 'none', sm: 'flex' },
                },

                '& > :last-child': {
                  display: { xs: 'initial', sm: 'none' },
                  marginLeft: 0,
                },
              }}
            >
              <FlexBox row spacing=".3em" sx={{ flexBasis: 'calc(50% + 1em)' }}>
                <BodyText>Host name</BodyText>
                <Divider sx={{ flexGrow: 1 }} />
              </FlexBox>
              <FlexBox row spacing=".3em" sx={{ flexGrow: 1 }}>
                <BodyText>IP address</BodyText>
                <Divider sx={{ flexGrow: 1 }} />
              </FlexBox>
              <Divider sx={{ flexGrow: 1 }} />
            </FlexBox>
          }
          allowCheckAll={isAllowCheckAll}
          allowCheckItem
          allowDelete
          allowEdit={false}
          edit
          listEmpty={
            <BodyText sx={{ textAlign: 'center' }}>
              No conflicting keys found.
            </BodyText>
          }
          listItems={changedSSHKeys}
          onAllCheckboxChange={(event, isChecked) => {
            Object.keys(changedSSHKeys).forEach((key) => {
              changedSSHKeys[key].isChecked = isChecked;
            });

            setChangedSSHKeys((previous) => ({ ...previous }));
          }}
          onItemCheckboxChange={(key, event, isChecked) => {
            changedSSHKeys[key].isChecked = isChecked;

            listRef.current.setCheckAll?.call(
              null,
              Object.values(changedSSHKeys).every(
                ({ isChecked: isItemChecked }) => isItemChecked,
              ),
            );

            setChangedSSHKeys((previous) => ({ ...previous }));
          }}
          renderListItem={(hostUUID, { hostName, ipAddress }) => (
            <FlexBox
              spacing={0}
              sm="row"
              sx={{ width: '100%', '& > *': { flexBasis: '50%' } }}
              xs="column"
            >
              <BodyText>{hostName}</BodyText>
              <BodyText>{ipAddress}</BodyText>
            </FlexBox>
          )}
          renderListItemCheckboxState={(key, { isChecked }) =>
            isChecked === true
          }
          ref={listRef}
        />
      </FlexBox>
    </ExpandablePanel>
  );
};

export default ManageChangedSSHKeysForm;