"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"

type ThemeIconProps = {
  theme?: string
}

const ThemeIcon = ({ theme }: ThemeIconProps) => {

  const [mounted, setMounted] = React.useState(false)

  React.useEffect(() => {
    setMounted(true)
  }, [])

  if (!mounted) {
    return null
  }

  switch (theme) {
    case "light":
      return (
        <Sun className="absolute h-[1.2rem] w-[1.2rem] scale-100 rotate-0 transition-all dark:scale-0 dark:-rotate-90" />
      )
    case "dark":
      return (
        <Moon className="absolute h-[1.2rem] w-[1.2rem] scale-0 rotate-90 transition-all dark:scale-100 dark:rotate-0" />
      )
    case "system":
      return (
        <Monitor className="absolute h-[1.2rem] w-[1.2rem] scale-100" />
      )
    default:
      return (<>
        <Sun className="h-[1.2rem] w-[1.2rem] scale-100 rotate-0 transition-all dark:scale-0 dark:-rotate-90" />
        <Moon className="absolute h-[1.2rem] w-[1.2rem] scale-0 rotate-90 transition-all dark:scale-100 dark:rotate-0" />
      </>)
  }
}

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

  return (
    <DropdownMenu>
      <DropdownMenuTrigger asChild>
        <Button variant="outline" size="icon">
          <ThemeIcon theme={theme} />
          <span className="sr-only">Toggle theme</span>
        </Button>
      </DropdownMenuTrigger>
      <DropdownMenuContent align="end">
        <DropdownMenuItem onClick={() => setTheme("light")}>
          Light
        </DropdownMenuItem>
        <DropdownMenuItem onClick={() => setTheme("dark")}>
          Dark
        </DropdownMenuItem>
        <DropdownMenuItem onClick={() => setTheme("system")}>
          System
        </DropdownMenuItem>
      </DropdownMenuContent>
    </DropdownMenu>
  )
}