import React from 'react';
import { NavLink, useNavigate } from 'react-router-dom';
import Logo from '@/assets/images/fcsclogo.svg';
import DashboardIconActive from '@/assets/images/cuida_dashboard-outline.svg';
import DashboardIconInactive from '@/assets/images/cuida_dashboard-outline-inactive.svg';
import CheckCircleActive from '@/assets/images/checkcircle-active.svg';
import ConfigActive from '@/assets/images/configrationicon-active.svg';
import ConfigInactive from '@/assets/images/configrationicon-inactive.svg';
import UserActive from '@/assets/images/user-active.svg';
import UserInactive from '@/assets/images/user-inactive.svg';
import ManageSubmissionInactive from '@/assets/images/managesubmission - inactive.svg';
import BellIconAsset from '@/assets/images/bell.svg';

const NavItem = ({ label, to, iconActive, iconInactive, end = false }) => (
  <NavLink
    to={to}
    end={end}
    className={({ isActive }) =>
      `inline-flex items-center gap-2 pb-1 border-b-2 text-[14px] leading-5 ` +
      (isActive ? 'text-[#92722A] font-medium border-[#92722A]' : 'text-[#232528] border-transparent hover:text-gray-900')
    }
  >
    {({ isActive }) => (
      <>
        {iconActive && iconInactive ? (
          <img src={isActive ? iconActive : iconInactive} alt={label} className="h-[18px] w-[18px]" />
        ) : (
          <span className={`inline-block h-[18px] w-[18px] rounded ${isActive ? 'bg-[#92722A]' : 'bg-[#C9CDD1]'}`} />
        )}
        <span>{label}</span>
      </>
    )}
  </NavLink>
);

const AdminHeader = () => {
  const [open, setOpen] = React.useState(false);
  const [profileOpen, setProfileOpen] = React.useState(false);
  const [userName, setUserName] = React.useState('User');
  const [userEmail, setUserEmail] = React.useState('user@example.com');
  const navigate = useNavigate();

  React.useEffect(() => {
    try {
      const stored = sessionStorage.getItem('user_profile');
      if (stored) {
        const parsed = JSON.parse(stored);
        if (parsed?.name || parsed?.username) {
          setUserName(parsed.name || parsed.username);
        }
        if (parsed?.email) {
          setUserEmail(parsed.email);
        }
      }
    } catch {
      // ignore corrupt storage
    }
  }, []);

  const handleLogout = () => {
    try {
      sessionStorage.removeItem('auth_token');
      sessionStorage.removeItem('user_profile');
      sessionStorage.removeItem('user_role');
      sessionStorage.removeItem('establishment_id');
    } catch {
      // ignore storage errors
    }
    setProfileOpen(false);
    navigate('/login');
  };

  return (
    <header className="bg-white border-b border-[#E5E7EB] shadow-[0_6px_18px_rgba(15,23,42,0.04)]">
      <div className="max-w-[1280px] mx-auto px-4">
        <div className="flex items-center h-20 gap-6 ">
          <img src={Logo} alt="FCSC" className="w-[140px] h-[44px] " />
          <nav className="flex-1 flex justify-end items-center gap-6 xl:gap-8 text-[14px] leading-5 ml-auto ">
            <NavItem to="/admin/dashboard" end label="Dashboard" iconActive={DashboardIconActive} iconInactive={DashboardIconInactive} />
            <NavItem to="/admin/validations" label="Manage Submissions" iconActive={CheckCircleActive} iconInactive={ManageSubmissionInactive} />
            <NavItem to="/admin/configuration" label="Configuration" iconActive={ConfigActive} iconInactive={ConfigInactive} />
            <NavItem to="/admin/users" label="Users" iconActive={UserActive} iconInactive={UserInactive} />
          </nav>
          <div className="hidden lg:flex items-center gap-3 ml-auto">
            <button
              type="button"
              aria-label="Notifications"
              className="inline-flex h-9 w-9 items-center justify-center rounded-full border border-transparent hover:border-[#E5E7EB]"
            >
              <img src={BellIconAsset} alt="Notifications" className="h-[18px] w-[18px]" />
            </button>
            <div className="relative">
              <button
                type="button"
                onClick={() => setProfileOpen((value) => !value)}
                className="h-9 w-9 rounded-full bg-[#F2F2F2] grid place-items-center text-[13px] font-medium text-[#232528]"
                aria-haspopup="menu"
                aria-expanded={profileOpen}
              >
                {userName?.slice(0, 1)?.toUpperCase() || 'U'}
              </button>
              {profileOpen && (
                <div className="absolute right-0 mt-3 w-64 rounded-[12px] border border-[#E5E7EB] bg-white shadow-[0_20px_30px_rgba(15,23,42,0.12)] z-50 text-center">
                  <div className="px-4 py-3 border-b border-[#F1F5F9]">
                    <p className="text-sm font-semibold text-[#232528] truncate" title={userName}>{userName}</p>
                    <p className="text-xs text-[#6B7280] truncate" title={userEmail}>{userEmail}</p>
                  </div>
                  <button
                    type="button"
                    className="w-full px-4 py-2.5 text-center text-sm text-[#232528] hover:bg-[#F2ECCF]"
                    onClick={() => {
                      setProfileOpen(false);
                      navigate('/reset-password');
                    }}
                  >
                    Change Password
                  </button>
                  <button
                    type="button"
                    className="w-full px-4 py-2.5 text-center text-sm text-[#B52520] hover:bg-[#FEE2E2]"
                    onClick={handleLogout}
                  >
                    Logout
                  </button>
                </div>
              )}
            </div>
          </div>
          <div className="ml-auto lg:hidden">
            <button
              type="button"
              aria-label="Open Menu"
              className="inline-flex items-center justify-center h-10 w-10 rounded-full border border-[#E5E7EB]"
              onClick={() => setOpen((v) => !v)}
            >
              <svg xmlns="http://www.w3.org/2000/svg" className="h-5 w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor">
                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M4 6h16M4 12h16M4 18h16" />
              </svg>
            </button>
          </div>
        </div>
        {open && (
          <div className="lg:hidden pb-6 border-t border-[#E5E7EB]">
            <nav className="flex flex-col gap-3 pt-4 text-[14px] leading-5">
              <NavItem to="/admin/dashboard" end label="Dashboard" iconActive={DashboardIconActive} iconInactive={DashboardIconInactive} />
              <NavItem to="/admin/validations" label="Manage Submissions" iconActive={CheckCircleActive} iconInactive={ManageSubmissionInactive} />
              <NavItem to="/admin/configuration" label="Configuration" iconActive={ConfigActive} iconInactive={ConfigInactive} />
              <NavItem to="/admin/users" label="Users" iconActive={UserActive} iconInactive={UserInactive} />
            </nav>
          </div>
        )}
      </div>
    </header>
  );
};

export default AdminHeader;