// Copyright (c) 2017 Uber Technologies, Inc.
//
// 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 { css } from '@emotion/css';
import cx from 'classnames';
import React, { memo, useEffect, useMemo } from 'react';

import { GrafanaTheme2 } from '@grafana/data';
import { TimeZone } from '@grafana/schema';
import { Badge, BadgeColor, Tooltip, useStyles2 } from '@grafana/ui';

import { SearchProps } from '../../useSearch';
import ExternalLinks from '../common/ExternalLinks';
import TraceName from '../common/TraceName';
import { getTraceLinks } from '../model/link-patterns';
import { getHeaderTags, getTraceName } from '../model/trace-viewer';
import { Trace } from '../types';
import { formatDuration } from '../utils/date';

import TracePageActions from './Actions/TracePageActions';
import { SpanFilters } from './SpanFilters/SpanFilters';
import { timestamp, getStyles } from './TracePageHeader';

export type TracePageHeaderProps = {
  trace: Trace | null;
  timeZone: TimeZone;
  search: SearchProps;
  setSearch: React.Dispatch<React.SetStateAction<SearchProps>>;
  showSpanFilters: boolean;
  setShowSpanFilters: (isOpen: boolean) => void;
  focusedSpanIdForSearch: string;
  setFocusedSpanIdForSearch: React.Dispatch<React.SetStateAction<string>>;
  spanFilterMatches: Set<string> | undefined;
  datasourceType: string;
  setHeaderHeight: (height: number) => void;
};

export const NewTracePageHeader = memo((props: TracePageHeaderProps) => {
  const {
    trace,
    timeZone,
    search,
    setSearch,
    showSpanFilters,
    setShowSpanFilters,
    focusedSpanIdForSearch,
    setFocusedSpanIdForSearch,
    spanFilterMatches,
    datasourceType,
    setHeaderHeight,
  } = props;
  const styles = { ...useStyles2(getStyles), ...useStyles2(getNewStyles) };

  useEffect(() => {
    setHeaderHeight(document.querySelector('.' + styles.header)?.scrollHeight ?? 0);
  }, [setHeaderHeight, showSpanFilters, styles.header]);

  const links = useMemo(() => {
    if (!trace) {
      return [];
    }
    return getTraceLinks(trace);
  }, [trace]);

  if (!trace) {
    return null;
  }

  const { method, status, url } = getHeaderTags(trace.spans);

  const title = (
    <h1 className={cx(styles.title)}>
      <TraceName traceName={getTraceName(trace.spans)} />
      <small>
        <span className={styles.divider}>|</span>
        {formatDuration(trace.duration)}
      </small>
    </h1>
  );

  let statusColor: BadgeColor = 'green';
  if (status && status.length > 0) {
    if (status[0].value.toString().charAt(0) === '4') {
      statusColor = 'orange';
    } else if (status[0].value.toString().charAt(0) === '5') {
      statusColor = 'red';
    }
  }

  return (
    <header className={styles.header}>
      <div className={styles.titleRow}>
        {links && links.length > 0 && <ExternalLinks links={links} className={styles.TracePageHeaderBack} />}
        {title}
        <TracePageActions traceId={trace.traceID} />
      </div>

      <div className={styles.subtitle}>
        {timestamp(trace, timeZone, styles)}
        {method || status || url ? <span className={styles.divider}>|</span> : undefined}
        {method && method.length > 0 && (
          <Tooltip content={'http.method'} interactive={true}>
            <span className={styles.tag}>
              <Badge text={method[0].value} color="blue" />
            </span>
          </Tooltip>
        )}
        {status && status.length > 0 && (
          <Tooltip content={'http.status_code'} interactive={true}>
            <span className={styles.tag}>
              <Badge text={status[0].value} color={statusColor} />
            </span>
          </Tooltip>
        )}
        {url && url.length > 0 && (
          <Tooltip content={'http.url or http.target or http.path'} interactive={true}>
            <span className={styles.url}>{url[0].value}</span>
          </Tooltip>
        )}
      </div>

      <SpanFilters
        trace={trace}
        showSpanFilters={showSpanFilters}
        setShowSpanFilters={setShowSpanFilters}
        search={search}
        setSearch={setSearch}
        spanFilterMatches={spanFilterMatches}
        focusedSpanIdForSearch={focusedSpanIdForSearch}
        setFocusedSpanIdForSearch={setFocusedSpanIdForSearch}
        datasourceType={datasourceType}
      />
    </header>
  );
});

NewTracePageHeader.displayName = 'NewTracePageHeader';

const getNewStyles = (theme: GrafanaTheme2) => {
  return {
    header: css`
      label: TracePageHeader;
      background-color: ${theme.colors.background.primary};
      padding: 0.5em 0 0 0;
      position: sticky;
      top: 0;
      z-index: 5;
    `,
    titleRow: css`
      align-items: center;
      display: flex;
      padding: 0 8px;
    `,
    title: css`
      color: inherit;
      flex: 1;
      font-size: 1.7em;
      line-height: 1em;
    `,
    subtitle: css`
      flex: 1;
      line-height: 1em;
      margin: -0.5em 8px 0.75em 8px;
    `,
    tag: css`
      margin: 0 0.5em 0 0;
    `,
    url: css`
      margin: -2.5px 0.3em;
      overflow: hidden;
      white-space: nowrap;
      text-overflow: ellipsis;
      max-width: 30%;
      display: inline-block;
    `,
    divider: css`
      margin: 0 0.75em;
    `,
  };
};