'use client';

import Link from 'next/link';
import { usePathname } from 'next/navigation';
import { useState } from 'react';
import { client, useMe } from '@/lib/api';
import { ActivityBell } from './ActivityBell';

/** Top bar: logo and the four main places. On phones those move to a bottom tab bar; wide screens use Shell's sidebar. */
export function Nav() {
  const { me } = useMe();
  const path = usePathname();
  const tabs = me
    ? [
        { href: '/', label: 'Feed', icon: <FeedIcon />, active: path === '/' },
        { href: '/friends', label: 'Friends', icon: <FriendsIcon />, active: path.startsWith('/friends') },
        { href: `/u/${me.username}`, label: 'Profile', icon: <ProfileIcon />, active: path.startsWith(`/u/${me.username}`) },
        { href: '/settings', label: 'Settings', icon: <SettingsIcon />, active: path.startsWith('/settings') || path === '/admin' },
      ]
    : [];

  return (
    <>
      <nav className="nav">
        <Link href="/" className="brand">
          <img className="brand-logo" src="/logo.png" alt="" width={30} height={30} />
          musicshare
        </Link>
        {me && <ActivityBell />}
        <div className="nav-links">
          {me ? (
            tabs.map((t) => (
              <Link key={t.href} href={t.href} className={t.active ? 'active' : ''} aria-current={t.active ? 'page' : undefined}>
                {t.label}
              </Link>
            ))
          ) : (
            <>
              <Link href="/login">Log in</Link>
              <Link href="/register" className="btn btn-primary">
                Sign up
              </Link>
            </>
          )}
        </div>
      </nav>
      {me && (
        <nav className="tabbar" aria-label="Main">
          {tabs.map((t) => (
            <Link key={t.href} href={t.href} className={t.active ? 'active' : ''} aria-current={t.active ? 'page' : undefined}>
              {t.icon}
              <span>{t.label}</span>
            </Link>
          ))}
        </nav>
      )}
      {me && !me.emailVerified && <VerifyBanner email={me.pendingEmail ?? me.email} />}
    </>
  );
}

/** Until they confirm, a forgotten password can't be reset; nudge them. */
function VerifyBanner({ email }: { email: string }) {
  const [sent, setSent] = useState(false);
  const resend = async () => {
    try {
      await client.resendVerification();
      setSent(true);
    } catch (err) {
      alert((err as Error).message);
    }
  };
  return (
    <div className="banner">
      Confirm your email: we sent a link to <strong>{email}</strong>.{' '}
      {sent ? (
        <span className="muted">Sent again.</span>
      ) : (
        <button className="link-button" onClick={resend}>
          Send it again
        </button>
      )}
    </div>
  );
}

const icon = { width: 22, height: 22, viewBox: '0 0 24 24', fill: 'none', stroke: 'currentColor', strokeWidth: 2, strokeLinecap: 'round', strokeLinejoin: 'round' } as const;
export const FeedIcon = () => (
  <svg {...icon} aria-hidden>
    <path d="M9 18V5l12-2v13" />
    <circle cx="6" cy="18" r="3" />
    <circle cx="18" cy="16" r="3" />
  </svg>
);
export const FriendsIcon = () => (
  <svg {...icon} aria-hidden>
    <circle cx="9" cy="8" r="3.5" />
    <path d="M2 20c0-3.6 3.1-6 7-6s7 2.4 7 6" />
    <path d="M16 4.5a3.5 3.5 0 0 1 0 7" />
    <path d="M18 14c2.4.6 4 2.6 4 6" />
  </svg>
);
export const ProfileIcon = () => (
  <svg {...icon} aria-hidden>
    <circle cx="12" cy="8" r="4" />
    <path d="M4 21c0-4 3.6-7 8-7s8 3 8 7" />
  </svg>
);
export const SettingsIcon = () => (
  <svg {...icon} aria-hidden>
    <circle cx="12" cy="12" r="3" />
    <path d="M19.4 15a1.7 1.7 0 0 0 .3 1.8l.1.1a2 2 0 1 1-2.8 2.8l-.1-.1a1.7 1.7 0 0 0-1.8-.3 1.7 1.7 0 0 0-1 1.5V21a2 2 0 1 1-4 0v-.1a1.7 1.7 0 0 0-1.1-1.5 1.7 1.7 0 0 0-1.8.3l-.1.1a2 2 0 1 1-2.8-2.8l.1-.1a1.7 1.7 0 0 0 .3-1.8 1.7 1.7 0 0 0-1.5-1H3a2 2 0 1 1 0-4h.1a1.7 1.7 0 0 0 1.5-1.1 1.7 1.7 0 0 0-.3-1.8l-.1-.1a2 2 0 1 1 2.8-2.8l.1.1a1.7 1.7 0 0 0 1.8.3H9a1.7 1.7 0 0 0 1-1.5V3a2 2 0 1 1 4 0v.1a1.7 1.7 0 0 0 1 1.5 1.7 1.7 0 0 0 1.8-.3l.1-.1a2 2 0 1 1 2.8 2.8l-.1.1a1.7 1.7 0 0 0-.3 1.8V9a1.7 1.7 0 0 0 1.5 1H21a2 2 0 1 1 0 4h-.1a1.7 1.7 0 0 0-1.5 1z" />
  </svg>
);