"use client"

import * as React from "react"
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()
  const [mounted, setMounted] = React.useState(false)

  // Ensure we only render the correct icon after mounting to avoid hydration mismatch
  React.useEffect(() => {
    setMounted(true)
  }, [])

  if (!mounted) {
    return (
      <Button 
        variant="ghost" 
        size="icon" 
        className="nav-button-transparent backdrop-blur-sm relative overflow-hidden transition-all duration-300 hover:scale-105 active:scale-95"
        disabled
      >
        <Monitor className="h-[1.1rem] w-[1.1rem] text-muted-foreground/60" />
        <span className="sr-only">Toggle theme</span>
      </Button>
    )
  }

  return (
    <DropdownMenu>
      <DropdownMenuTrigger asChild>
        <Button 
          variant="ghost" 
          size="icon" 
          className="nav-button-transparent backdrop-blur-sm relative overflow-hidden transition-all duration-300 hover:scale-105 active:scale-95 group"
        >
          {/* Enhanced icon transitions with better positioning */}
          <Sun className="h-[1.1rem] w-[1.1rem] rotate-0 scale-100 transition-all duration-500 ease-in-out dark:-rotate-180 dark:scale-0 text-amber-500 dark:text-amber-400 group-hover:text-amber-600 dark:group-hover:text-amber-300" />
          <Moon className="absolute h-[1.1rem] w-[1.1rem] rotate-180 scale-0 transition-all duration-500 ease-in-out dark:rotate-0 dark:scale-100 text-blue-600 dark:text-blue-400 group-hover:text-blue-700 dark:group-hover:text-blue-300" />
          
          {/* Subtle background glow effect on hover */}
          <div className="absolute inset-0 rounded-full bg-gradient-to-r from-amber-500/0 to-blue-500/0 group-hover:from-amber-500/10 group-hover:to-blue-500/10 dark:group-hover:from-amber-400/10 dark:group-hover:to-blue-400/10 transition-all duration-300" />
          
          <span className="sr-only">Toggle theme</span>
        </Button>
      </DropdownMenuTrigger>
      
      <DropdownMenuContent 
        align="end" 
        className="nav-dropdown-transparent min-w-[140px] animate-in fade-in-0 zoom-in-95 slide-in-from-top-2 duration-200"
        sideOffset={8}
      >
        <DropdownMenuItem 
          onClick={() => setTheme("light")} 
          className="flex items-center gap-3 nav-dropdown-item cursor-pointer group/item"
        >
          <Sun className="h-4 w-4 text-amber-500 group-hover/item:text-amber-600 transition-colors duration-200" />
          <span className="flex-1">Light</span>
          {theme === "light" && (
            <span className="text-xs text-emerald-600 dark:text-emerald-400 font-medium animate-in fade-in-0 scale-in-75 duration-200">✓</span>
          )}
        </DropdownMenuItem>
        
        <DropdownMenuItem 
          onClick={() => setTheme("dark")} 
          className="flex items-center gap-3 nav-dropdown-item cursor-pointer group/item"
        >
          <Moon className="h-4 w-4 text-blue-600 dark:text-blue-400 group-hover/item:text-blue-700 dark:group-hover/item:text-blue-300 transition-colors duration-200" />
          <span className="flex-1">Dark</span>
          {theme === "dark" && (
            <span className="text-xs text-emerald-600 dark:text-emerald-400 font-medium animate-in fade-in-0 scale-in-75 duration-200">✓</span>
          )}
        </DropdownMenuItem>
        
        <DropdownMenuItem 
          onClick={() => setTheme("system")} 
          className="flex items-center gap-3 nav-dropdown-item cursor-pointer group/item"
        >
          <Monitor className="h-4 w-4 text-slate-600 dark:text-slate-400 group-hover/item:text-slate-700 dark:group-hover/item:text-slate-300 transition-colors duration-200" />
          <span className="flex-1">System</span>
          {theme === "system" && (
            <span className="text-xs text-emerald-600 dark:text-emerald-400 font-medium animate-in fade-in-0 scale-in-75 duration-200">✓</span>
          )}
        </DropdownMenuItem>
      </DropdownMenuContent>
    </DropdownMenu>
  )
}