// Copyright (c) 2019 The Jaeger Authors.
//
// Licensed 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 from 'react';
import { css } from 'emotion';
import NewWindowIcon from '../common/NewWindowIcon';
import { TraceSpanReference } from '@grafana/data';
import { UITooltip, UIDropdown, UIMenuItem, UIMenu, TooltipPlacement } from '../uiElementsContext';

import ReferenceLink from '../url/ReferenceLink';
import { createStyle } from '../Theme';

export const getStyles = createStyle(() => {
  return {
    MultiParent: css`
      padding: 0 5px;
      color: #000;
      & ~ & {
        margin-left: 5px;
      }
    `,
    TraceRefLink: css`
      display: flex;
      justify-content: space-between;
    `,
    NewWindowIcon: css`
      margin: 0.2em 0 0;
    `,
    tooltip: css`
      max-width: none;
    `,
  };
});

type TReferencesButtonProps = {
  references: TraceSpanReference[];
  children: React.ReactNode;
  tooltipText: string;
  focusSpan: (spanID: string) => void;
};

export default class ReferencesButton extends React.PureComponent<TReferencesButtonProps> {
  referencesList = (references: TraceSpanReference[]) => {
    const styles = getStyles();
    return (
      <UIMenu>
        {references.map((ref) => {
          const { span, spanID } = ref;
          return (
            <UIMenuItem key={`${spanID}`}>
              <ReferenceLink reference={ref} focusSpan={this.props.focusSpan} className={styles.TraceRefLink}>
                {span
                  ? `${span.process.serviceName}:${span.operationName} - ${ref.spanID}`
                  : `(another trace) - ${ref.spanID}`}
                {!span && <NewWindowIcon className={styles.NewWindowIcon} />}
              </ReferenceLink>
            </UIMenuItem>
          );
        })}
      </UIMenu>
    );
  };

  render() {
    const { references, children, tooltipText, focusSpan } = this.props;
    const styles = getStyles();

    const tooltipProps = {
      arrowPointAtCenter: true,
      mouseLeaveDelay: 0.5,
      placement: 'bottom' as TooltipPlacement,
      title: tooltipText,
      overlayClassName: styles.tooltip,
    };

    if (references.length > 1) {
      return (
        <UITooltip {...tooltipProps}>
          <UIDropdown overlay={this.referencesList(references)} placement="bottomRight" trigger={['click']}>
            <a className={styles.MultiParent}>{children}</a>
          </UIDropdown>
        </UITooltip>
      );
    }
    const ref = references[0];
    return (
      <UITooltip {...tooltipProps}>
        <ReferenceLink reference={ref} focusSpan={focusSpan} className={styles.MultiParent}>
          {children}
        </ReferenceLink>
      </UITooltip>
    );
  }
}
