import classNames from 'classnames'
import React from 'react'
import { Link, withRouter } from 'react-router-dom'
import { userIsLoggedIn } from '../../auth/index'
import Login from '../../containers/auth/Login'
import Logout from '../../containers/auth/Logout'
import ProfileName from '../../containers/auth/ProfileName'
import './Navbar.css'

export const NAVBAR_HEIGHT = 60

export const NavItem = withRouter(props => <NavItemWithoutRoute {...props} />)
export const LoggedInSection = withRouter(props => (
    <LoggedInSectionWithoutRoute {...props} />
))

const GitHubLink = () => (
    <a
        href="https://github.com/atlarge-research/opendc"
        className="ml-2 mr-3 text-dark"
        style={{ position: 'relative', top: 7 }}
    >
        <span className="fa fa-github fa-2x"/>
    </a>
)

const NavItemWithoutRoute = ({ route, location, children }) => (
    <li
        className={classNames(
            'nav-item',
            location.pathname === route ? 'active' : undefined,
        )}
    >
        {children}
    </li>
)

const LoggedInSectionWithoutRoute = ({ location }) => (
    <ul className="navbar-nav auth-links">
        {userIsLoggedIn() ? (
            [
                location.pathname === '/' ? (
                    <NavItem route="/simulations" key="simulations">
                        <Link className="nav-link" title="My Simulations" to="/simulations">
                            My Simulations
                        </Link>
                    </NavItem>
                ) : (
                    <NavItem route="/profile" key="profile">
                        <Link className="nav-link" title="My Profile" to="/profile">
                            <ProfileName/>
                        </Link>
                    </NavItem>
                ),
                <NavItem route="logout" key="logout">
                    <Logout/>
                </NavItem>,
            ]
        ) : (
            <NavItem route="login">
                <GitHubLink/>
                <Login visible={true}/>
            </NavItem>
        )}
    </ul>
)

const Navbar = ({ fullWidth, children }) => (
    <nav
        className="navbar fixed-top navbar-expand-lg navbar-light bg-faded"
        id="navbar"
    >
        <div className={fullWidth ? 'container-fluid' : 'container'}>
            <button
                className="navbar-toggler navbar-toggler-right"
                type="button"
                data-toggle="collapse"
                data-target="#navbarSupportedContent"
                aria-controls="navbarSupportedContent"
                aria-expanded="false"
                aria-label="Toggle navigation"
            >
                <span className="navbar-toggler-icon"/>
            </button>
            <Link
                className="navbar-brand opendc-brand"
                to="/"
                title="OpenDC"
                onClick={() => window.scrollTo(0, 0)}
            >
                <img src="/img/logo.png" alt="OpenDC"/>
            </Link>

            <div className="collapse navbar-collapse" id="navbarSupportedContent">
                <ul className="navbar-nav mr-auto">{children}</ul>
                <LoggedInSection/>
            </div>
        </div>
    </nav>
)

export default Navbar