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AI_Agent_V4
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import React from 'react';
import { Button } from './ui/button';
import { Menu, Sun, Moon, Languages, ChevronDown } from 'lucide-react';
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuTrigger,
} from './ui/dropdown-menu';
import clareAvatar from '../assets/dfe44dab3ad8cd93953eac4a3e68bd1a5f999653.png';
import type { Workspace } from '../App';

interface HeaderProps {
  user: UserType | null;
  onMenuClick: () => void;
  onUserClick: () => void;
  isDarkMode: boolean;
  onToggleDarkMode: () => void;
  language: Language;
  onLanguageChange: (lang: Language) => void;
  workspaces: Workspace[];
  currentWorkspace: Workspace | undefined;
  onWorkspaceChange: (workspaceId: string) => void;
}

type UserType = {
  name: string;
  email: string;
};

type Language = 'auto' | 'en' | 'zh';

export function Header({
  user,
  onMenuClick,
  onUserClick,
  isDarkMode,
  onToggleDarkMode,
  language,
  onLanguageChange,
  workspaces,
  currentWorkspace,
  onWorkspaceChange,
}: HeaderProps) {
  const languageLabels = {
    auto: 'Auto',
    en: 'English',
    zh: '简体中文',
  };

  return (
    <header className="h-16 border-b border-border bg-card px-4 lg:px-6 flex items-center justify-between sticky top-0 z-[100]">
      <div className="flex items-center gap-4">
        <Button
          variant="ghost"
          size="icon"
          className="lg:hidden"
          onClick={onMenuClick}
        >
          <Menu className="h-5 w-5" />
        </Button>
        
        <div className="flex items-center gap-3">
          <div className="w-10 h-10 rounded-full overflow-hidden bg-white flex items-center justify-center">
            <img src={clareAvatar} alt="Clare AI" className="w-full h-full object-cover" />
          </div>
          <div>
            <h1 className="text-lg sm:text-xl tracking-tight">
              Clare <span className="text-sm font-bold text-muted-foreground hidden sm:inline ml-2">Your Personalized AI Tutor</span>
            </h1>
            <p className="text-xs text-muted-foreground hidden sm:block">
              Personalized guidance, review, and intelligent reinforcement
            </p>
          </div>
        </div>
      </div>

      <div className="flex items-center gap-2">
        <DropdownMenu>
          <DropdownMenuTrigger asChild>
            <Button
              variant="ghost"
              size="icon"
              aria-label="Change language"
            >
              <Languages className="h-5 w-5" />
            </Button>
          </DropdownMenuTrigger>
          <DropdownMenuContent align="end">
            <DropdownMenuItem onClick={() => onLanguageChange('auto')}>
              {language === 'auto' && '✓ '}Auto
            </DropdownMenuItem>
            <DropdownMenuItem onClick={() => onLanguageChange('en')}>
              {language === 'en' && '✓ '}English
            </DropdownMenuItem>
            <DropdownMenuItem onClick={() => onLanguageChange('zh')}>
              {language === 'zh' && '✓ '}简体中文
            </DropdownMenuItem>
          </DropdownMenuContent>
        </DropdownMenu>
        
        <Button
          variant="ghost"
          size="icon"
          onClick={onToggleDarkMode}
          aria-label="Toggle dark mode"
        >
          {isDarkMode ? <Sun className="h-5 w-5" /> : <Moon className="h-5 w-5" />}
        </Button>
        
        {user && currentWorkspace ? (
          <DropdownMenu>
            <DropdownMenuTrigger asChild>
              <Button
                variant="outline"
                className="gap-2 pl-2 pr-3"
                aria-label="Switch workspace"
              >
                <img 
                  src={currentWorkspace.avatar} 
                  alt={currentWorkspace.name}
                  className="w-6 h-6 rounded-full object-cover"
                />
                <span className="hidden sm:inline max-w-[120px] truncate">{currentWorkspace.name}</span>
                <ChevronDown className="h-4 w-4 opacity-50" />
              </Button>
            </DropdownMenuTrigger>
            <DropdownMenuContent align="end" className="min-w-[14rem]">
              {workspaces.map((workspace) => (
                <DropdownMenuItem 
                  key={workspace.id}
                  onClick={() => onWorkspaceChange(workspace.id)}
                  className={`gap-3 ${currentWorkspace.id === workspace.id ? 'bg-accent' : ''}`}
                >
                  <img 
                    src={workspace.avatar} 
                    alt={workspace.name}
                    className="w-6 h-6 rounded-full object-cover flex-shrink-0"
                  />
                  <span className="truncate">{workspace.name}</span>
                  {currentWorkspace.id === workspace.id && (
                    <span className="ml-auto text-primary">✓</span>
                  )}
                </DropdownMenuItem>
              ))}
            </DropdownMenuContent>
          </DropdownMenu>
        ) : null}
      </div>
    </header>
  );
}