erp-cicd/frontend/src/components/layout/ThemeToggle.tsx

import { Moon, Sun, Monitor } from "lucide-react"
import { useTheme } from "next-themes"
import { Button } from "@/components/ui/button"
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu"

export function ThemeToggle() {
  const { setTheme, theme } = useTheme()

  return (
    <DropdownMenu>
      <DropdownMenuTrigger asChild>
        <Button variant="outline" size="icon">
          <Sun className="h-[1.2rem] w-[1.2rem] rotate-0 scale-100 transition-all dark:-rotate-90 dark:scale-0" />
          <Moon className="absolute h-[1.2rem] w-[1.2rem] rotate-90 scale-0 transition-all dark:rotate-0 dark:scale-100" />
          <span className="sr-only">Toggle theme</span>
        </Button>
      </DropdownMenuTrigger>
      <DropdownMenuContent align="end">
        <DropdownMenuItem 
          onClick={() => setTheme("light")}
          className="flex items-center gap-2"
        >
          <Sun className="h-4 w-4" />
          Light
          {theme === "light" && <span className="ml-auto text-xs">✓</span>}
        </DropdownMenuItem>
        <DropdownMenuItem 
          onClick={() => setTheme("dark")}
          className="flex items-center gap-2"
        >
          <Moon className="h-4 w-4" />
          Dark
          {theme === "dark" && <span className="ml-auto text-xs">✓</span>}
        </DropdownMenuItem>
        <DropdownMenuItem 
          onClick={() => setTheme("system")}
          className="flex items-center gap-2"
        >
          <Monitor className="h-4 w-4" />
          System
          {theme === "system" && <span className="ml-auto text-xs">✓</span>}
        </DropdownMenuItem>
      </DropdownMenuContent>
    </DropdownMenu>
  )
}