// @flow
import 'scss/component/_header.scss';

import { useIsMobile } from 'effects/use-screensize';
import { withRouter } from 'react-router';
import * as ICONS from 'constants/icons';
import * as PAGES from 'constants/pages';
import Button from 'component/button';
import classnames from 'classnames';
import HeaderMenuButtons from 'component/headerMenuButtons';
import HeaderProfileMenuButton from 'component/headerProfileMenuButton';
import Logo from 'component/logo';
import NotificationBubble from 'component/notificationBubble';
import React from 'react';
import SkipNavigationButton from 'component/skipNavigationButton';
import Tooltip from 'component/common/tooltip';
import WunderBar from 'component/wunderbar';

type Props = {
  authenticated: boolean,
  authHeader: boolean,
  backout: {
    backLabel?: string,
    backNavDefault?: string,
    title: string,
    simpleTitle: string, // Just use the same value as `title` if `title` is already short (~< 10 chars), unless you have a better idea for title overlfow on mobile
  },
  balance: number,
  emailToVerify?: string,
  hasNavigated: boolean,
  hideBalance: boolean,
  hideCancel: boolean,
  history: {
    goBack: () => void,
    location: { pathname: string },
    push: (string) => void,
    replace: (string) => void,
  },
  isAbsoluteSideNavHidden: boolean,
  roundedBalance: string,
  roundedSpendableBalance: string,
  sidebarOpen: boolean,
  syncError: ?string,
  user: ?User,
  clearEmailEntry: () => void,
  clearPasswordEntry: () => void,
  openChangelog: ({}) => void,
  setSidebarOpen: (boolean) => void,
  signOut: () => void,
};

const Header = (props: Props) => {
  const {
    authenticated,
    authHeader,
    backout,
    balance,
    emailToVerify,
    hideBalance,
    hideCancel,
    history,
    isAbsoluteSideNavHidden,
    roundedBalance,
    roundedSpendableBalance,
    sidebarOpen,
    syncError,
    user,
    clearEmailEntry,
    clearPasswordEntry,
    openChangelog,
    setSidebarOpen,
    signOut,
  } = props;

  const {
    location: { pathname },
    goBack,
    push,
  } = history;

  const isMobile = useIsMobile();

  // on the verify page don't let anyone escape other than by closing the tab to keep session data consistent
  const isVerifyPage = pathname.includes(PAGES.AUTH_VERIFY);
  const isSignUpPage = pathname.includes(PAGES.AUTH);
  const isSignInPage = pathname.includes(PAGES.AUTH_SIGNIN);
  const isPwdResetPage = pathname.includes(PAGES.AUTH_PASSWORD_RESET);

  // For pages that allow for "backing out", shows a backout option instead of the Home logo
  const canBackout = Boolean(backout);
  const { backLabel, backNavDefault, title: backTitle, simpleTitle: simpleBackTitle } = backout || {};

  // Sign out if they click the "x" when they are on the password prompt
  const authHeaderAction = syncError && { onClick: signOut };
  const homeButtonNavigationProps = (isVerifyPage && {}) || (authHeader && authHeaderAction) || { navigate: '/' };
  const sidebarLabel = sidebarOpen
    ? __('Close sidebar - hide channels you are following.')
    : __('Expand sidebar - view channels you are following.');

  const onBackout = React.useCallback(
    (e: any) => {
      const { hasNavigated } = props;
      const { replace } = history;

      window.removeEventListener('popstate', onBackout);

      if (e.type !== 'popstate') {
        // if not initiated by pop (back button)
        if (hasNavigated && !backNavDefault) {
          goBack();
        } else {
          replace(backNavDefault || `/`);
        }
      }
    },
    [backNavDefault, goBack, history, props]
  );

  React.useEffect(() => {
    if (canBackout) {
      window.addEventListener('popstate', onBackout);
      return () => window.removeEventListener('popstate', onBackout);
    }
  }, [canBackout, onBackout]);

  const userButtons = (hideWallet?: boolean, hideProfile?: boolean) => (
    <div className="header__menu--right">
      {isMobile && !authHeader && !canBackout && <WunderBar />}

      {authenticated ? (
        <>
          {!hideWallet && (
            <Tooltip
              title={
                balance > 0
                  ? __('Immediately spendable: %spendable_balance%', { spendable_balance: roundedSpendableBalance })
                  : __('Your Wallet')
              }
            >
              <div>
                <Button
                  navigate={`/$/${PAGES.WALLET}`}
                  className="button--file-action header__navigationItem--balance"
                  label={hideBalance || Number(roundedBalance) === 0 ? __('Your Wallet') : roundedBalance}
                  icon={ICONS.LBC}
                />
              </div>
            </Tooltip>
          )}

          {!hideProfile && <HeaderProfileMenuButton />}
        </>
      ) : (
        <div className="header__authButtons">
          {!isMobile && (
            <Button navigate={`/$/${PAGES.AUTH_SIGNIN}`} button="link" label={__('Log In')} disabled={user === null} />
          )}
          <Button navigate={`/$/${PAGES.AUTH}`} button="primary" label={__('Sign Up')} disabled={user === null} />
        </div>
      )}
    </div>
  );

  return (
    <header className={classnames('header', { 'header--minimal': authHeader })}>
      {!authHeader && canBackout ? (
        <div className="card__actions--between header__contents">
          <div className="header__menu--left">
            <Button onClick={onBackout} button="link" label={backLabel || __('Cancel')} icon={ICONS.ARROW_LEFT} />
          </div>

          {backTitle && <h1 className="header__authTitle">{(isMobile && simpleBackTitle) || backTitle}</h1>}

          {userButtons(false, isMobile)}
        </div>
      ) : (
        <>
          <div className="header__navigation">
            <div className="header__menu--left">
              <SkipNavigationButton />

              {!authHeader && (
                <span style={{ position: 'relative' }}>
                  <Button
                    aria-label={sidebarLabel}
                    className="header__navigationItem--icon"
                    icon={ICONS.MENU}
                    aria-expanded={sidebarOpen}
                    onClick={() => setSidebarOpen(!sidebarOpen)}
                  >
                    {isAbsoluteSideNavHidden && isMobile && <NotificationBubble />}
                  </Button>
                </span>
              )}

              <Button
                aria-label={__('Home')}
                className="header__navigationItem--logo"
                onClick={() => pathname === '/' && window.location.reload()}
                {...homeButtonNavigationProps}
              >
                <Logo />
              </Button>

              {/* @if process.env.DEV_CHANGELOG */}
              {history.location.pathname === '/' && (
                <Button
                  title="Changelog"
                  className="badge--alert"
                  label="Changelog"
                  icon={ICONS.FEEDBACK}
                  onClick={() =>
                    openChangelog({
                      title: __('Changelog'),
                      subtitle: __('Warning: this is a test instance.'),
                      body: <p style={{ whiteSpace: 'pre-wrap' }}>{process.env.DEV_CHANGELOG}</p>,
                      onConfirm: (closeModal) => closeModal(),
                      hideCancel: true,
                    })
                  }
                />
              )}
              {/* @endif */}
            </div>

            {!authHeader && !isMobile && (
              <div className="header__center">
                <WunderBar />
                <HeaderMenuButtons />
              </div>
            )}

            {!authHeader && !canBackout
              ? userButtons(isMobile)
              : !isVerifyPage &&
                !hideCancel && (
                  <div className="header__menu--right">
                    <Button
                      title={__('Go Back')}
                      button="alt"
                      // className="button--header-close"
                      icon={ICONS.REMOVE}
                      onClick={() => {
                        clearEmailEntry();
                        clearPasswordEntry();

                        if (syncError) signOut();

                        if ((isSignInPage && !emailToVerify) || isSignUpPage || isPwdResetPage) {
                          goBack();
                        } else {
                          push('/');
                        }
                      }}
                    />
                  </div>
                )}
          </div>
        </>
      )}
    </header>
  );
};

export default withRouter(Header);