import { html, css } from '../templater.js'

const body = (path) => html`
  <nav>
    <ul>
      <li class="${path === '/' ? 'active' : ''}"><a href="/">Home</a></li>
      <li class="${path === '/about' ? 'active' : ''} "><a href="/about">About</a></li>
    </ul>
  </nav>
`

const styles = css`
  nav ul {
    list-style: none;
    display: flex;
    align-items: center;
  }

  nav li {
    padding: 1rem 2rem;
  }

  nav a {
    display: block;
    position: relative;
    padding: .5rem 1rem;
    color: var(--color-body);
    text-decoration: none;
  }

  nav a:before {
    content: ' ';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 1rem;
    transition: transform 200ms;
    transform: scale(0);
    z-index: -1;
  }

  nav a:hover:before, nav .active a:before {
    transform: scale(1);
  }

  nav .active a {
    color: var(--color-headings);
  }
`

export function NavBar (ctx, { path }) {
  ctx.css.add(styles)
  ctx.body = body(path)
  return ctx
}