import React, { useState, useEffect } from 'react';
import { useTranslation } from 'react-i18next';
import { UserMeResponse } from '../types/api';
import { logout } from '../utils/api';
import LanguageSwitch from './LanguageSwitch';

interface SidebarItemProps {
  icon: React.ReactNode;
  label: string;
  isActive?: boolean;
  isCollapsed: boolean;
  isDisabled?: boolean;
  onClick?: () => void;
}

const SidebarItem: React.FC<SidebarItemProps> = ({ icon, label, isActive, isCollapsed, isDisabled, onClick }) => {
  return (
    <div
      onClick={isDisabled ? undefined : onClick}
      className={`sidebar-item ${isActive ? 'active' : ''} ${isCollapsed ? 'collapsed' : ''} ${isDisabled ? 'disabled' : ''}`}
      title={isCollapsed ? label : ""}
    >
      <div className="sidebar-item-icon">
        {icon}
      </div>
      {!isCollapsed && <span className="sidebar-item-label">{label}</span>}
    </div>
  );
};

interface SidebarProps {
  activeItem: string;
  onNavigate: (id: string) => void;
  onHome?: () => void;
  userInfo?: UserMeResponse | null;
  onLogout?: () => void;
}

const Sidebar: React.FC<SidebarProps> = ({ activeItem, onNavigate, onHome, userInfo, onLogout }) => {
  const { t } = useTranslation();
  const [isCollapsed, setIsCollapsed] = useState(false);
  const [isMobileOpen, setIsMobileOpen] = useState(false);
  const [isLoggingOut, setIsLoggingOut] = useState(false);

  // 로그아웃 처리
  const handleLogout = async () => {
    if (isLoggingOut) return;
    setIsLoggingOut(true);
    try {
      await logout();
      onLogout?.();
    } catch (error) {
      console.error('Logout failed:', error);
      // 에러가 나도 로컬 토큰은 이미 삭제됨, 홈으로 이동
      onLogout?.();
    } finally {
      setIsLoggingOut(false);
    }
  };

  useEffect(() => {
    const handleResize = () => {
      if (window.innerWidth < 768) {
        setIsMobileOpen(false);
      }
    };

    handleResize();
    window.addEventListener('resize', handleResize);
    return () => window.removeEventListener('resize', handleResize);
  }, []);

  const handleNavigate = (id: string) => {
    onNavigate(id);
    if (window.innerWidth < 768) {
      setIsMobileOpen(false);
    }
  };

  const menuItems = [
    { id: '대시보드', label: t('sidebar.dashboard'), disabled: false, icon: <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.5"><rect x="3" y="3" width="7" height="9"/><rect x="14" y="3" width="7" height="5"/><rect x="14" y="12" width="7" height="9"/><rect x="3" y="16" width="7" height="5"/></svg> },
    { id: '새 프로젝트 만들기', label: t('sidebar.newProject'), disabled: false, icon: <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.5"><line x1="12" y1="5" x2="12" y2="19"/><line x1="5" y1="12" x2="19" y2="12"/></svg> },
    { id: 'ADO2 콘텐츠', label: t('sidebar.ado2Contents'), disabled: false, icon: <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.5"><path d="M22 19a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h5l2 3h9a2 2 0 0 1 2 2z"/></svg> },
    { id: '내 콘텐츠', label: t('sidebar.myContents'), disabled: true, icon: <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.5"><rect x="3" y="3" width="18" height="18" rx="2" ry="2"/><circle cx="8.5" cy="8.5" r="1.5"/><polyline points="21 15 16 10 5 21"/></svg> },
    { id: '내 정보', label: t('sidebar.myInfo'), disabled: false, icon: <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.5"><path d="M20 21v-2a4 4 0 0 0-4-4H8a4 4 0 0 0-4 4v2"/><circle cx="12" cy="7" r="4"/></svg> },
  ];

  return (
    <>
      {/* Mobile Menu Button */}
      <button
        onClick={() => setIsMobileOpen(true)}
        className="mobile-menu-btn"
      >
        <svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
          <line x1="3" y1="12" x2="21" y2="12"/><line x1="3" y1="6" x2="21" y2="6"/><line x1="3" y1="18" x2="21" y2="18"/>
        </svg>
      </button>

      {/* Mobile Overlay */}
      {isMobileOpen && (
        <div
          className="mobile-overlay"
          onClick={() => setIsMobileOpen(false)}
        />
      )}

      {/* Sidebar */}
      <div className={`sidebar ${isCollapsed ? 'collapsed' : 'expanded'} ${isMobileOpen ? 'mobile-open' : 'mobile-closed'}`}>
        <div className={`sidebar-header ${isCollapsed ? 'collapsed' : ''}`}>
          {!isCollapsed && (
            <img
              onClick={onHome}
              src="/assets/images/ado2-sidebar-logo.svg"
              alt="ADO2"
              className="sidebar-logo"
            />
          )}
          <button
            onClick={() => {
              if (window.innerWidth < 768) {
                setIsMobileOpen(false);
              } else {
                setIsCollapsed(!isCollapsed);
              }
            }}
            className="p-1.5 text-gray-400 hover:text-white"
          >
            <svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
              <line x1="3" y1="12" x2="21" y2="12"/><line x1="3" y1="6" x2="21" y2="6"/><line x1="3" y1="18" x2="21" y2="18"/>
            </svg>
          </button>
        </div>

        <div className="sidebar-menu no-scrollbar">
          {menuItems.map(item => (
            <SidebarItem
              key={item.id}
              icon={item.icon}
              label={item.label}
              isCollapsed={isCollapsed}
              isActive={activeItem === item.id}
              isDisabled={item.disabled}
              onClick={() => handleNavigate(item.id)}
            />
          ))}
        </div>

        <div className="sidebar-footer">
          <div className="sidebar-language-switch">
            <LanguageSwitch isCollapsed={isCollapsed} />
          </div>

          <div className={`profile-section ${isCollapsed ? 'collapsed' : ''}`}>
            {userInfo?.profile_image_url || userInfo?.thumbnail_image_url ? (
              <img
                src={userInfo.thumbnail_image_url || userInfo.profile_image_url || ''}
                alt="Profile"
                className="profile-avatar"
              />
            ) : (
              <div className="profile-avatar profile-avatar-default">
                <svg width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
                  <path d="M20 21v-2a4 4 0 0 0-4-4H8a4 4 0 0 0-4 4v2"/>
                  <circle cx="12" cy="7" r="4"/>
                </svg>
              </div>
            )}
            {!isCollapsed && (
              <div className="flex-1 min-w-0">
                <p className="profile-name">{userInfo?.nickname || t('sidebar.defaultUser')}</p>
              </div>
            )}
          </div>

          <button
            className={`logout-btn ${isCollapsed ? 'collapsed' : ''}`}
            onClick={handleLogout}
            disabled={isLoggingOut}
          >
            <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.5">
              <path d="M9 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h4"/><polyline points="16 17 21 12 16 7"/><line x1="21" y1="12" x2="9" y2="12"/>
            </svg>
            {!isCollapsed && <span className="logout-btn-label">{isLoggingOut ? t('sidebar.loggingOut') : t('sidebar.logout')}</span>}
          </button>
        </div>
      </div>
    </>
  );
};

export default Sidebar;