import React, { useState, useEffect } from 'react';
import { Link, useLocation } from 'react-router-dom';
import { Icons } from './IconSet';
import { authService } from '../services/AuthService';
import { DiscordUser } from '../types';

interface LayoutProps {
  children: React.ReactNode;
  activeTab: string;
  onNavigate: (tab: string) => void;
}

const NavItem = ({
  active,
  label,
  to
}: {
  active: boolean;
  label: string;
  to: string;
}) => (
  <Link
    to={to}
    className={`text-sm font-medium transition-colors duration-200 px-1 py-4 border-b-2 ${
      active
        ? 'text-textMain border-accentInfo'
        : 'text-textMuted border-transparent hover:text-textMain hover:border-border'
    }`}
  >
    {label}
  </Link>
);

const Layout: React.FC<LayoutProps> = ({ children, activeTab, onNavigate }) => {
  const [mobileMenuOpen, setMobileMenuOpen] = useState(false);
  const [user, setUser] = useState<DiscordUser | null>(null);

  useEffect(() => {
    // Subscribe to auth changes
    const unsubscribe = authService.subscribe(setUser);
    return unsubscribe;
  }, []);

  return (
    <div className="min-h-screen flex flex-col font-sans">
      {/* Top Header - Website Style */}
      <header className="sticky top-0 z-40 bg-background/80 backdrop-blur-md border-b border-border">
        <div className="max-w-7xl mx-auto px-6 h-16 flex items-center justify-between">
            <div className="flex items-center gap-10">
                {/* Logo */}
                <div 
                  className="flex items-center gap-3 cursor-pointer group" 
                  onClick={() => onNavigate('dashboard')}
                >
                    <div className="w-8 h-8 bg-gradient-to-br from-accentInfo to-blue-900 rounded flex items-center justify-center shadow-glow group-hover:shadow-lg transition-shadow">
                        <span className="font-bold text-white text-sm">P.V.</span>
                    </div>
                    <span className="font-bold text-lg tracking-tight text-textMain">Projekt: Vollidion</span>
                </div>

                {/* Desktop Nav */}
                <nav className="hidden md:flex items-center gap-6 h-full">
                    <NavItem active={activeTab === 'dashboard'} label="Übersicht" to="/" />
                    <NavItem active={activeTab === 'cities'} label="Städte" to="/cities" />
                    <NavItem active={activeTab === 'players'} label="Bürger" to="/players" />
                    {/* <NavItem active={activeTab === 'organizations'} label="Organisationen" to="/organizations" />*/}
                    <NavItem active={activeTab === 'projects'} label="Unternehmen" to="/projects" />
                    {user?.isAdmin && (
                        <NavItem active={activeTab === 'admin'} label="Admin" to="/admin" />
                    )}
                </nav>
            </div>

            <div className="flex items-center gap-4">
              {user?.isAdmin && (
                 <>
                  <button
                  onClick={() => onNavigate('datapack')}
                  className="hidden md:flex items-center gap-2 text-xs font-medium text-textMain hover:text-accentInfo transition-colors"
                >
                  <Icons.Box className="w-3 h-3" />
                  <span>Datapack holen</span>
                </button><button
                  onClick={() => onNavigate('setup')}
                  className="hidden md:flex items-center gap-2 text-xs font-medium text-textMuted hover:text-accentInfo transition-colors border border-border rounded-full px-4 py-1.5 hover:bg-surfaceHighlight"
                >
                    <Icons.Terminal className="w-3 h-3" />
                    <span>Admin Setup</span>
                  </button>
                </>
                 )}
                 {/* Mobile Menu Toggle */}
                 <button 
                   className="md:hidden text-textMuted hover:text-textMain"
                   onClick={() => setMobileMenuOpen(!mobileMenuOpen)}
                 >
                    <Icons.Layers className="w-6 h-6" />
                 </button>
            </div>
        </div>

        {/* Mobile Nav Dropdown */}
        {mobileMenuOpen && (
          <div className="md:hidden border-t border-border bg-surface px-6 py-4 space-y-4 shadow-xl">
             <Link to="/" onClick={() => setMobileMenuOpen(false)} className="block py-2 text-textMuted hover:text-textMain">Übersicht</Link>
             <Link to="/cities" onClick={() => setMobileMenuOpen(false)} className="block py-2 text-textMuted hover:text-textMain">Städte</Link>
             <Link to="/players" onClick={() => setMobileMenuOpen(false)} className="block py-2 text-textMuted hover:text-textMain">Bürger</Link>
             <Link to="/organizations" onClick={() => setMobileMenuOpen(false)} className="block py-2 text-textMuted hover:text-textMain">Organisationen</Link>
             <Link to="/projects" onClick={() => setMobileMenuOpen(false)} className="block py-2 text-textMuted hover:text-textMain">Unternehmen</Link>
             {user?.isAdmin && (
               <Link to="/admin" onClick={() => setMobileMenuOpen(false)} className="block py-2 text-red-400 hover:text-red-300">Admin</Link>
             )}
             <Link to="/datapack" onClick={() => setMobileMenuOpen(false)} className="block py-2 text-textMain">Datapack holen</Link>
             <Link to="/setup" onClick={() => setMobileMenuOpen(false)} className="block py-2 text-accentInfo font-mono text-sm border-t border-white/5 pt-4">{"Admin Setup >_"}</Link>
          </div>
        )}
      </header>

      {/* Main Content - Page Flow */}
      <main className="flex-1 w-full max-w-7xl mx-auto px-6 py-12 md:py-16">
        <div className="animate-in fade-in duration-700 slide-in-from-bottom-4">
          {children}
        </div>
      </main>

      {/* Footer - Adds to the "Website" feel */}
      <footer className="border-t border-border mt-auto bg-surface/30">
          <div className="max-w-7xl mx-auto px-6 py-10 flex flex-col md:flex-row justify-between items-center text-sm text-textMuted">
              <div className="flex items-center gap-2 mb-4 md:mb-0 opacity-50">
                 <div className="w-4 h-4 bg-textMuted rounded-full"></div>
                 <p>© 2024 Obsidian Platform</p>
              </div>
              <div className="flex flex-col md:flex-row items-center gap-8">
                  {/* Auth Section */}
                  <div className="flex items-center gap-4 mb-4 md:mb-0">
                      {user ? (
                        <div className="flex items-center gap-3">
                          <div className="flex items-center gap-2">
                            <img
                              src={user.avatarUrl}
                              alt={user.username}
                              className="w-6 h-6 rounded-full"
                            />
                            <span className="text-textMain font-medium">{user.username}</span>
                          </div>
                          <button
                            onClick={() => authService.logout()}
                            className="text-xs text-textMuted hover:text-accentInfo transition-colors"
                          >
                            Logout
                          </button>
                        </div>
                      ) : (
                        <button
                          onClick={() => authService.login()}
                          className="flex items-center gap-2 text-textMain hover:text-accentInfo transition-colors font-medium"
                        >
                          <Icons.Users className="w-4 h-4" />
                          <span>Discord Login</span>
                        </button>
                      )}
                  </div>

                  {/* Links */}
                  <div className="flex gap-8">
                      <span className="cursor-pointer hover:text-textMain transition-colors">Dokumentation</span>
                      <span className="cursor-pointer hover:text-textMain transition-colors">Server Status</span>
                      <span className="cursor-pointer hover:text-textMain transition-colors">Datenschutz</span>
                  </div>
              </div>
          </div>
      </footer>
    </div>
  );
};

export default Layout;