'use client';

import { Bell, LogOut, Moon, Sun, ChevronDown, HelpCircle, KeyRound, ScanLine } from 'lucide-react';
import { useAuthStore } from '@/lib/auth-store';
import { useTheme } from '@/lib/theme-store';
import { useState } from 'react';
import Link from 'next/link';
import ChangePasswordModal from '@/components/layout/ChangePasswordModal';

export default function Header() {
  const { user, logout } = useAuthStore();
  const { isDark, toggleTheme } = useTheme();
  const [showUserMenu, setShowUserMenu] = useState(false);
  const [showNotifications, setShowNotifications] = useState(false);
  const [showChangePassword, setShowChangePassword] = useState(false);

  return (
    <header className="flex h-16 items-center justify-between border-b border-gray-200 dark:border-slate-700 bg-white dark:bg-slate-900 px-6 shadow-sm">
      <div className="flex flex-1 items-center gap-4">
        <h2 className="text-xl font-semibold text-[rgb(20,113,76)] dark:text-[rgb(20,113,76)]"></h2>
        <Link
          href="/boarding"
          className="ml-auto rounded-lg p-2 hover:bg-gray-100 dark:hover:bg-slate-800 transition-colors"
          title="Boarding / Gate Scan"
        >
          <ScanLine className="h-5 w-5 text-[rgb(20,113,76)] dark:text-slate-400" />
        </Link>
      </div>

      <div className="flex items-center gap-3">
        {/* Help Documentation */}
        <Link
          href="/docs"
          className="rounded-lg p-2 hover:bg-gray-100 dark:hover:bg-slate-800 transition-colors"
          title="View Documentation"
          target="_blank"
        >
          <HelpCircle className="h-5 w-5 text-[rgb(20,113,76)] dark:text-slate-400" />
        </Link>

        {/* Notifications */}
        <div className="relative">
          <button 
            onClick={() => setShowNotifications(!showNotifications)}
            className="relative rounded-lg p-2 hover:bg-gray-100 dark:hover:bg-slate-800 transition-colors"
          >
            <Bell className="h-5 w-5 text-[rgb(20,113,76)] dark:text-slate-400" />
            <span className="absolute right-1 top-1 h-2 w-2 rounded-full bg-[rgb(20,113,76)]"></span>
          </button>
          
          {showNotifications && (
            <div className="fixed inset-x-2 top-20 z-50 rounded-lg border border-gray-200 dark:border-slate-700 bg-white dark:bg-slate-900 shadow-xl sm:absolute sm:inset-x-auto sm:right-0 sm:top-full sm:mt-2 sm:w-80 md:w-96">
              <div className="p-4 border-b border-gray-200 dark:border-slate-700">
                <h3 className="font-semibold text-foreground">Notifications</h3>
              </div>
              <div className="max-h-96 overflow-y-auto">
                <Link href="/notifications" className="block p-4 hover:bg-gray-50 dark:hover:bg-slate-800 transition-colors border-b border-gray-200 dark:border-slate-700">
                  <p className="text-sm font-medium text-foreground">New booking received</p>
                  <p className="text-xs text-muted-foreground mt-1">Booking #BK-2024-001 created</p>
                  <p className="text-xs text-muted-foreground mt-1">2 minutes ago</p>
                </Link>
                <Link href="/notifications" className="block p-4 hover:bg-gray-50 dark:hover:bg-slate-800 transition-colors border-b border-gray-200 dark:border-slate-700">
                  <p className="text-sm font-medium text-foreground">Payment confirmed</p>
                  <p className="text-xs text-muted-foreground mt-1">Payment of 1,250 ETB received</p>
                  <p className="text-xs text-muted-foreground mt-1">15 minutes ago</p>
                </Link>
                <Link href="/notifications" className="block p-4 hover:bg-gray-50 dark:hover:bg-slate-800 transition-colors">
                  <p className="text-sm font-medium text-foreground">System update</p>
                  <p className="text-xs text-muted-foreground mt-1">New features available</p>
                  <p className="text-xs text-muted-foreground mt-1">1 hour ago</p>
                </Link>
              </div>
              <div className="p-3 border-t border-gray-200 dark:border-slate-700">
                <Link href="/notifications" className="text-sm text-primary hover:underline">
                  View all notifications
                </Link>
              </div>
            </div>
          )}
        </div>

        {/* Theme Toggle */}
        <button
          onClick={toggleTheme}
          className="rounded-lg p-2 hover:bg-gray-100 dark:hover:bg-slate-800 transition-colors"
          title={isDark ? 'Switch to Light Mode' : 'Switch to Dark Mode'}
        >
          {isDark ? <Sun className="h-5 w-5 text-[rgb(20,113,76)] dark:text-slate-400" /> : <Moon className="h-5 w-5 text-[rgb(20,113,76)] dark:text-slate-400" />}
        </button>

        {/* User Menu */}
        <div className="relative">
          <button
            onClick={() => setShowUserMenu(!showUserMenu)}
            className="flex items-center gap-3 rounded-lg p-2 hover:bg-gray-100 dark:hover:bg-slate-800 transition-colors"
          >
            <div className="flex h-8 w-8 items-center justify-center rounded-full bg-[rgb(20,113,76)] text-white font-semibold text-sm shadow-md">
              {user?.fullName?.toUpperCase().charAt(0) || 'A'}
            </div>
            <div className="text-left hidden md:block">
              <p className="text-sm font-medium text-foreground">{user?.fullName || 'Full Name'}</p>
              <p className="text-xs text-muted-foreground">{user?.role || 'User Role'}</p>
            </div>
            <ChevronDown className="h-4 w-4 text-[rgb(20,113,76)] dark:text-slate-400" />
          </button>

          {showUserMenu && (
            <div className="fixed inset-x-2 top-20 z-50 rounded-lg border border-gray-200 dark:border-slate-700 bg-white dark:bg-slate-900 shadow-xl sm:absolute sm:inset-x-auto sm:right-0 sm:top-full sm:mt-2 sm:w-56">
              <div className="p-3 border-b border-gray-200 dark:border-slate-700">
                <p className="text-sm font-medium text-foreground">{user?.fullName || 'Full Name'}</p>
                <p className="text-xs text-muted-foreground">{user?.email || 'user@email.com'}</p>
              </div>
              <div className="p-2">
                <Link
                  href="/settings"
                  className="flex items-center gap-2 rounded-lg px-3 py-2 text-sm text-foreground hover:bg-gray-100 dark:hover:bg-slate-800 transition-colors"
                >
                  Settings
                </Link>
                <button
                  onClick={() => {
                    setShowUserMenu(false);
                    setShowChangePassword(true);
                  }}
                  className="flex w-full items-center gap-2 rounded-lg px-3 py-2 text-sm text-foreground hover:bg-gray-100 dark:hover:bg-slate-800 transition-colors"
                >
                  <KeyRound className="h-4 w-4" />
                  Change Password
                </button>
                <button
                  onClick={() => {
                    logout();
                    window.location.href = '/login';
                  }}
                  className="flex w-full items-center gap-2 rounded-lg px-3 py-2 text-sm text-[rgb(20,113,76)] dark:text-green-400 hover:bg-green-50 dark:hover:bg-green-900/20 transition-colors"
                >
                  <LogOut className="h-4 w-4" />
                  Logout
                </button>
              </div>
            </div>
          )}
        </div>
      </div>

      <ChangePasswordModal
        isOpen={showChangePassword}
        onClose={() => setShowChangePassword(false)}
      />
    </header>
  );
}