import {HTMLProps, ReactNode} from 'react';
import styled from '@emotion/styled';

import {HeaderTitle} from 'sentry/styles/organization';
import space from 'sentry/styles/space';

type Props = {
  // The title
  title: ReactNode;

  // CTA button
  action?: ReactNode;
  body?: ReactNode;

  className?: string;
  // Icon left of title
  icon?: ReactNode;

  // Disables font styles in the title. Allows for more custom titles.
  noTitleStyles?: boolean;

  subtitle?: ReactNode;

  tabs?: ReactNode;
};

function UnstyledSettingsPageHeader({
  icon,
  title,
  subtitle,
  action,
  body,
  tabs,
  noTitleStyles = false,
  ...props
}: Props) {
  // If Header is narrow, use align-items to center <Action>.
  // Otherwise, use a fixed margin to prevent an odd alignment.
  // This is needed as Actions could be a button or a dropdown.
  const isNarrow = !subtitle;

  return (
    <div {...props}>
      <TitleAndActions isNarrow={isNarrow}>
        <TitleWrapper>
          {icon && <Icon>{icon}</Icon>}
          {title && (
            <Title tabs={tabs} styled={noTitleStyles}>
              <HeaderTitle>{title}</HeaderTitle>
              {subtitle && <Subtitle>{subtitle}</Subtitle>}
            </Title>
          )}
        </TitleWrapper>
        {action && <Action isNarrow={isNarrow}>{action}</Action>}
      </TitleAndActions>

      {body && <BodyWrapper>{body}</BodyWrapper>}
      {tabs && <TabsWrapper>{tabs}</TabsWrapper>}
    </div>
  );
}

interface TitleProps extends React.HTMLAttributes<HTMLDivElement> {
  styled?: boolean;
  tabs?: ReactNode;
}

const TitleAndActions = styled('div')<{isNarrow?: boolean}>`
  display: flex;
  align-items: ${p => (p.isNarrow ? 'center' : 'flex-start')};
`;
const TitleWrapper = styled('div')`
  flex: 1;
`;

const Title = styled('div')<TitleProps>`
  ${p => !p.styled && `font-size: 20px; font-weight: 600;`};
  margin: ${space(4)} ${space(2)} ${space(3)} 0;
`;
const Subtitle = styled('div')`
  color: ${p => p.theme.gray400};
  font-weight: 400;
  font-size: ${p => p.theme.fontSizeLarge};
  padding: ${space(1.5)} 0 0;
`;

const Icon = styled('div')`
  margin-right: ${space(1)};
`;

const Action = styled('div')<{isNarrow?: boolean}>`
  margin-top: ${p => (p.isNarrow ? '0' : space(4))};
`;

const SettingsPageHeader = styled(UnstyledSettingsPageHeader)<
  Omit<HTMLProps<HTMLDivElement>, keyof Props> & Props
>`
  font-size: 14px;
  margin-top: -${space(4)};
`;

const BodyWrapper = styled('div')`
  flex: 1;
  margin: 0 0 ${space(3)};
`;
const TabsWrapper = styled('div')`
  flex: 1;
  margin: 0; /* sentry/components/navTabs has added margin */
`;

export default SettingsPageHeader;