"use client"

import { useTheme } from "next-themes"
import { useEffect, useState } from "react"

export default function ThemeToggle() {
  const { theme, setTheme } = useTheme()
  const [mounted, setMounted] = useState(false)

  useEffect(() => setMounted(true), [])

  if (!mounted) {
    return <button className="theme-toggle" aria-label="Toggle theme"><span style={{ width: 18, height: 18 }} /></button>
  }

  const isDark = theme === "dark"

  return (
    <button
      className="theme-toggle"
      onClick={() => setTheme(isDark ? "light" : "dark")}
      aria-label={isDark ? "Switch to light mode" : "Switch to dark mode"}
    >
      {isDark ? (
        <svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
          <circle cx="12" cy="12" r="5" />
          <line x1="12" y1="1" x2="12" y2="3" />
          <line x1="12" y1="21" x2="12" y2="23" />
          <line x1="4.22" y1="4.22" x2="5.64" y2="5.64" />
          <line x1="18.36" y1="18.36" x2="19.78" y2="19.78" />
          <line x1="1" y1="12" x2="3" y2="12" />
          <line x1="21" y1="12" x2="23" y2="12" />
          <line x1="4.22" y1="19.78" x2="5.64" y2="18.36" />
          <line x1="18.36" y1="5.64" x2="19.78" y2="4.22" />
        </svg>
      ) : (
        <svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
          <path d="M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z" />
        </svg>
      )}
    </button>
  )
}