import { useState } from 'react';
import { Link, useNavigate } from 'react-router-dom';
import { useAuthStore } from '@/features/auth/store/authStore';
import { useUser } from '@/features/auth/hooks/useUser';
import { useUIStore } from '@/stores/ui';
import { useTranslation } from '@/hooks/useTranslation';
import { EmailVerificationBadge } from '@/features/auth/components/EmailVerificationBadge';
import { NotificationMenu } from '@/components/notifications/NotificationMenu';
import { GlobalSearchBar } from '@/components/search/GlobalSearchBar';
import { RateLimitIndicator } from '@/components/RateLimitIndicator';
import { Button } from '@/components/ui/button';
import { FocusTrap } from '@/components/ui/focus-trap';
import { Tooltip } from '@/components/ui/tooltip';
import { cn } from '@/lib/utils';
import {
  User,
  Settings,
  LogOut,
  Moon,
  Sun,
  Monitor,
  Search,
  Cpu,
} from 'lucide-react';
import type { BaseComponentProps } from '../types';

/**
 * Props for Header component
 * FE-TYPE-013: Fully typed component props
 */
export interface HeaderProps extends BaseComponentProps {
  // No additional props needed - uses global stores
}

export function Header(_props: HeaderProps) {
  const [isUserMenuOpen, setIsUserMenuOpen] = useState(false);
  const { logout } = useAuthStore();
  const { data: user } = useUser();
  const { theme, setTheme } = useUIStore();
  const { t } = useTranslation();
  const navigate = useNavigate();

  const handleLogout = async () => {
    await logout();
    navigate('/login');
  };

  const toggleTheme = () => {
    const newTheme =
      theme === 'light' ? 'dark' : theme === 'dark' ? 'system' : 'light';
    setTheme(newTheme);
  };

  const getThemeIcon = () => {
    switch (theme) {
      case 'light':
        return <Sun className="h-4 w-4" />;
      case 'dark':
        return <Moon className="h-4 w-4" />;
      default:
        return <Monitor className="h-4 w-4" />;
    }
  };

  return (
    <header
      className="fixed top-0 left-0 right-0 h-16 px-6 mt-4 pointer-events-none"
      style={{ zIndex: 'var(--z-fixed)' }}
    >
      <div className="max-w-[1700px] mx-auto w-full h-full glass-hud rounded-2xl border-white/10 flex items-center justify-between px-6 pointer-events-auto hud-corner shadow-neon-cyan/5 group">
        <div className="flex items-center gap-6">
          <Link
            to="/dashboard"
            className="flex items-center gap-4 active:scale-95 transition-transform focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-kodo-steel focus-visible:ring-offset-2 focus-visible:ring-offset-kodo-void rounded"
          >
            <div className="w-10 h-10 bg-kodo-steel/20 rounded-xl flex items-center justify-center border border-kodo-steel/30 shadow-2xl animate-scan">
              <Cpu className="w-6 h-6 text-kodo-steel animate-pulse-glow" />
            </div>
            <div className="hidden sm:block">
              <h1 className="text-3xl font-display font-bold text-white tracking-widest uppercase leading-tight">
                Veza<span className="text-kodo-steel">OS</span>
              </h1>
              <div className="text-[9px] font-mono text-kodo-steel/50 tracking-[0.2em] uppercase -mt-0.5">
                Core Network v2.4
              </div>
            </div>
          </Link>

          {/* HUD System Status */}
          <div className="hidden xl:flex items-center gap-6 border-l border-white/10 pl-8 h-8">
            <div className="flex flex-col">
              <span className="text-hud">Uplink Status</span>
              <div className="flex items-center gap-1.5">
                <span className="w-1.5 h-1.5 rounded-full bg-kodo-lime animate-pulse" />
                <span className="text-[11px] font-mono text-white opacity-90 uppercase tracking-tighter">
                  Connected
                </span>
              </div>
            </div>
            <div className="flex flex-col">
              <span className="text-hud">Node ID</span>
              <span className="text-[11px] font-mono text-kodo-cyan opacity-90 uppercase truncate max-w-[80px]">
                VZ-{user?.id?.slice(0, 4)}
              </span>
            </div>
          </div>
        </div>

        {/* Global Search integrated */}
        <div className="flex-1 max-w-lg mx-8 relative hidden md:block">
          <GlobalSearchBar className="w-full bg-transparent border-none" />
          <div className="absolute left-3 top-1/2 -translate-y-1/2 flex items-center gap-2 pointer-events-none opacity-50 group-hover:opacity-100 transition-opacity">
            <Search className="w-4 h-4 text-kodo-steel" />
          </div>
        </div>

        <div className="flex items-center gap-4">
          {/* Quick Stats Overlay - Styled specifically */}
          <div className="hidden lg:flex items-center gap-1 mr-4 bg-kodo-cyan/5 border border-kodo-steel/10 rounded-full px-4 py-1.5">
            <div className="w-1.5 h-1.5 rounded-full bg-kodo-lime" />
            <span className="text-[10px] font-mono text-kodo-steel uppercase font-bold tracking-tight">
              Active_Stream_OK
            </span>
          </div>

          <NotificationMenu />

          <RateLimitIndicator />

          <Tooltip content={t('common.changeTheme')}>
            <Button
              variant="ghost"
              size="icon"
              onClick={toggleTheme}
              className="hover:bg-white/5 hover:text-white transition-all rounded-xl border border-transparent hover:border-white/5"
            >
              {getThemeIcon()}
            </Button>
          </Tooltip>

          <div className="w-px h-6 bg-white/10 mx-1" />

          {/* User Profile HUD */}
          <div className="relative">
            <Button
              variant="ghost"
              size="sm"
              onClick={() => setIsUserMenuOpen(!isUserMenuOpen)}
              className={cn(
                'p-1 pr-3 rounded-xl gap-2 transition-all border border-transparent',
                isUserMenuOpen
                  ? 'bg-kodo-cyan/10 border-kodo-cyan/30 text-kodo-cyan'
                  : 'hover:bg-white/5',
              )}
            >
              <div className="w-8 h-8 rounded-lg bg-kodo-graphite border border-white/10 flex items-center justify-center overflow-hidden">
                <User className="w-5 h-5 text-kodo-secondary" />
              </div>
              <div className="flex flex-col items-start hidden sm:flex">
                <span className="text-xs font-bold text-white leading-none">
                  {user?.username}
                </span>
                <span className="text-[9px] font-mono text-kodo-secondary uppercase tracking-tighter">
                  Lvl 1 Operative
                </span>
              </div>
            </Button>

            {isUserMenuOpen && (
              <FocusTrap
                active={isUserMenuOpen}
                onEscape={() => setIsUserMenuOpen(false)}
              >
                <div className="absolute right-0 mt-3 w-56 glass-hud rounded-2xl border-white/10 shadow-2xl z-50 p-2 animate-scaleIn hud-corner">
                  <div className="px-4 py-4 border-b border-white/5 mb-2">
                    <div className="text-xs font-mono text-kodo-steel opacity-50 uppercase tracking-widest mb-1">
                      User_Registry
                    </div>
                    <div className="text-sm font-bold text-white truncate">
                      {user?.email}
                    </div>
                    {user && !user.is_verified && (
                      <div className="mt-2">
                        <EmailVerificationBadge verified={false} />
                      </div>
                    )}
                  </div>

                  <div className="space-y-1">
                    <Link
                      to="/profile"
                      onClick={() => setIsUserMenuOpen(false)}
                      className="flex items-center gap-4 px-4 py-2 text-sm text-kodo-secondary hover:text-white hover:bg-white/5 rounded-xl transition-all group focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-kodo-steel focus-visible:ring-offset-2 focus-visible:ring-offset-kodo-void"
                    >
                      <User className="w-4 h-4" />
                      <span>System.Profile</span>
                    </Link>
                    <Link
                      to="/settings"
                      onClick={() => setIsUserMenuOpen(false)}
                      className="flex items-center gap-4 px-4 py-2 text-sm text-kodo-secondary hover:text-white hover:bg-white/5 rounded-xl transition-all group focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-kodo-steel focus-visible:ring-offset-2 focus-visible:ring-offset-kodo-void"
                    >
                      <Settings className="w-4 h-4 group-hover:rotate-45 transition-transform" />
                      <span>Global.Settings</span>
                    </Link>
                    <div className="h-px bg-white/5 my-2 mx-2" />
                    <button
                      onClick={handleLogout}
                      className="flex items-center gap-4 w-full px-4 py-2 text-sm text-kodo-red/80 hover:text-kodo-red hover:bg-kodo-red/10 rounded-xl transition-all group cursor-pointer focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-red-400 focus-visible:ring-offset-2 focus-visible:ring-offset-kodo-void"
                    >
                      <LogOut className="w-4 h-4" />
                      <span>Terminate.Session</span>
                    </button>
                  </div>
                </div>
              </FocusTrap>
            )}
          </div>
        </div>
      </div>
    </header>
  );
}