import {useMemo} from 'react';
import styled from '@emotion/styled';
import Color from 'color';

import {Breadcrumbs} from 'sentry/components/breadcrumbs';
import {Button} from 'sentry/components/button';
import Count from 'sentry/components/count';
import EventOrGroupTitle from 'sentry/components/eventOrGroupTitle';
import EventMessage from 'sentry/components/events/eventMessage';
import ParticipantList from 'sentry/components/group/streamlinedParticipantList';
import Link from 'sentry/components/links/link';
import {IconChevron, IconPanel} from 'sentry/icons';
import {t} from 'sentry/locale';
import {space} from 'sentry/styles/space';
import type {Event} from 'sentry/types/event';
import type {Group, TeamParticipant, UserParticipant} from 'sentry/types/group';
import type {Project} from 'sentry/types/project';
import {useLocation} from 'sentry/utils/useLocation';
import useOrganization from 'sentry/utils/useOrganization';
import {useSyncedLocalStorageState} from 'sentry/utils/useSyncedLocalStorageState';
import {useUser} from 'sentry/utils/useUser';
import GroupActions from 'sentry/views/issueDetails/actions/index';
import {Divider} from 'sentry/views/issueDetails/divider';
import GroupPriority from 'sentry/views/issueDetails/groupPriority';
import {GroupHeaderAssigneeSelector} from 'sentry/views/issueDetails/streamline/assigneeSelector';
import {AttachmentsBadge} from 'sentry/views/issueDetails/streamline/attachmentsBadge';
import {ReplayBadge} from 'sentry/views/issueDetails/streamline/replayBadge';
import {UserFeedbackBadge} from 'sentry/views/issueDetails/streamline/userFeedbackBadge';
import {useIssueDetailsHeader} from 'sentry/views/issueDetails/useIssueDetailsHeader';
import type {ReprocessingStatus} from 'sentry/views/issueDetails/utils';

interface GroupHeaderProps {
  baseUrl: string;
  event: Event | null;
  group: Group;
  groupReprocessingStatus: ReprocessingStatus;
  project: Project;
}

export default function StreamlinedGroupHeader({
  group,
  project,
  baseUrl,
  groupReprocessingStatus,
  event,
}: GroupHeaderProps) {
  const activeUser = useUser();
  const location = useLocation();
  const organization = useOrganization();
  const {sort: _sort, ...query} = location.query;

  const {count: eventCount, userCount} = group;

  const [sidebarOpen, setSidebarOpen] = useSyncedLocalStorageState(
    'issue-details-sidebar-open',
    true
  );

  const {message, eventRoute, disableActions, shortIdBreadcrumb} = useIssueDetailsHeader({
    group,
    groupReprocessingStatus,
    baseUrl,
    project,
  });

  const {userParticipants, teamParticipants, displayUsers} = useMemo(() => {
    return {
      userParticipants: group.participants.filter(
        (p): p is UserParticipant => p.type === 'user'
      ),
      teamParticipants: group.participants.filter(
        (p): p is TeamParticipant => p.type === 'team'
      ),
      displayUsers: group.seenBy.filter(user => activeUser.id !== user.id),
    };
  }, [group, activeUser.id]);

  return (
    <Header>
      <StyledBreadcrumbs
        crumbs={[
          {
            label: 'Issues',
            to: {
              pathname: `/organizations/${organization.slug}/issues/`,
              query: query,
            },
          },
          {label: shortIdBreadcrumb},
        ]}
      />
      <HeadingGrid>
        <Heading>
          <TitleHeading>
            <TitleWrapper>
              <StyledEventOrGroupTitle data={group} />
            </TitleWrapper>
          </TitleHeading>
          <MessageWrapper>
            <EventMessage
              data={group}
              message={message}
              type={group.type}
              level={group.level}
              showUnhandled={group.isUnhandled}
              levelIndicatorSize={'10px'}
            />
            <AttachmentsBadge group={group} />
            <UserFeedbackBadge group={group} project={project} />
            <ReplayBadge group={group} project={project} />
          </MessageWrapper>
        </Heading>
        <AllStats>
          <Stat>
            <Label data-test-id="all-event-count">{t('All Events')}</Label>
            <Link disabled={disableActions} to={eventRoute}>
              <StatCount value={eventCount} />
            </Link>
          </Stat>
          <Stat>
            <Label>{t('All Users')}</Label>
            <Link disabled={disableActions} to={`${baseUrl}tags/user/${location.search}`}>
              <StatCount value={userCount} />
            </Link>
          </Stat>
        </AllStats>
      </HeadingGrid>

      <StyledBreak />
      <InfoWrapper
        isResolvedOrIgnored={group.status === 'resolved' || group.status === 'ignored'}
      >
        <GroupActions
          group={group}
          project={project}
          disabled={disableActions}
          event={event}
          query={location.query}
        />
        <SidebarWorkflowWrapper>
          <WorkflowWrapper>
            <Wrapper>
              {t('Priority')}
              <GroupPriority group={group} />
            </Wrapper>
            <Wrapper>
              {t('Assignee')}
              <GroupHeaderAssigneeSelector
                group={group}
                project={project}
                event={event}
              />
            </Wrapper>
            {group.participants.length > 0 && (
              <Wrapper>
                {t('Participants')}
                <ParticipantList users={userParticipants} teams={teamParticipants} />
              </Wrapper>
            )}
            {displayUsers.length > 0 && (
              <Wrapper>
                {t('Viewers')}
                <ParticipantList users={displayUsers} />
              </Wrapper>
            )}
          </WorkflowWrapper>
          <CollapseSidebarWrapper>
            <Divider />
            <Button
              icon={
                sidebarOpen ? (
                  <IconChevron direction="right" />
                ) : (
                  <IconPanel direction="right" />
                )
              }
              title={sidebarOpen ? t('Close Sidebar') : t('Open Sidebar')}
              aria-label={sidebarOpen ? t('Close Sidebar') : t('Open Sidebar')}
              size="sm"
              borderless
              onClick={() => setSidebarOpen(!sidebarOpen)}
            />
          </CollapseSidebarWrapper>
        </SidebarWorkflowWrapper>
      </InfoWrapper>
    </Header>
  );
}

const StyledEventOrGroupTitle = styled(EventOrGroupTitle)`
  font-size: inherit;
  align-items: baseline;
`;

const HeadingGrid = styled('div')`
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: ${space(2)};
  align-items: center;
`;

const Heading = styled('div')``;

const AllStats = styled('div')`
  display: flex;
  gap: ${space(4)};
  padding-top: ${space(0.25)};
`;

const Stat = styled('div')`
  display: flex;
  flex-direction: column;
  gap: ${space(1)};
  font-size: ${p => p.theme.fontSizeSmall};
`;

const Label = styled('div')`
  font-size: ${p => p.theme.fontSizeSmall};
  font-weight: ${p => p.theme.fontWeightBold};
  color: ${p => p.theme.subText};
`;

const StatCount = styled(Count)`
  font-size: ${p => p.theme.fontSizeExtraLarge};
  display: block;
  line-height: 1;
`;

const TitleWrapper = styled('h3')`
  font-size: 20px;
  margin: 0;
  padding-bottom: 2px;
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
  color: ${p => p.theme.headingColor};

  & em {
    font-weight: ${p => p.theme.fontWeightNormal};
    color: ${p => p.theme.textColor};
    font-size: ${p => p.theme.fontSizeLarge};
  }
`;

const TitleHeading = styled('div')`
  display: flex;
  line-height: 2;
  gap: ${space(1)};
`;

const StyledBreak = styled('hr')`
  margin-top: ${space(1.5)};
  margin-bottom: 0;
  margin-right: 0;
  border-color: ${p => p.theme.border};
`;

const MessageWrapper = styled('div')`
  display: flex;
  color: ${p => p.theme.gray300};
  gap: ${space(1)};
`;

const InfoWrapper = styled('div')<{isResolvedOrIgnored: boolean}>`
  display: flex;
  justify-content: space-between;
  gap: ${space(1)};
  background: ${p =>
    p.isResolvedOrIgnored
      ? `linear-gradient(to right, ${p.theme.background}, ${Color(p.theme.success).lighten(0.5).alpha(0.15).string()})`
      : p.theme.background};
  color: ${p => p.theme.gray300};
  padding: ${space(0.5)} 24px;
  margin-right: 0;
  margin-left: 0;
  flex-wrap: wrap;
`;

const SidebarWorkflowWrapper = styled('div')`
  display: flex;
  gap: ${space(0.5)};
  align-items: center;
`;

const WorkflowWrapper = styled('div')`
  display: flex;
  column-gap: ${space(2)};
  flex-wrap: wrap;
`;

const Wrapper = styled('div')`
  display: flex;
  align-items: center;
  gap: ${space(0.5)};
`;

const Header = styled('div')`
  background-color: ${p => p.theme.background};
  display: flex;
  flex-direction: column;
  border-bottom: 1px solid ${p => p.theme.border};

  > * {
    margin-right: 24px;
    margin-left: 24px;
  }
`;

const StyledBreadcrumbs = styled(Breadcrumbs)`
  margin-top: ${space(2)};
`;

const CollapseSidebarWrapper = styled('div')`
  display: flex;
  gap: ${space(0.5)};
  align-items: center;

  @media (max-width: ${p => p.theme.breakpoints.large}) {
    display: none;
  }
`;