import * as React from "react";
import { Moon, Sun, Monitor } from "lucide-react";
import { useTheme } from "next-themes";
import { api } from "@/trpc/react";

import { Button } from "@/components/ui/button";
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu";

export function ThemeToggle() {
  const { setTheme } = useTheme();
  const updateUIThemeMutation = api.settings.updateUITheme.useMutation();

  const handleThemeChange = (newTheme: "light" | "dark" | "system") => {
    // Update local theme immediately for instant feedback
    setTheme(newTheme);

    // Sync with backend
    updateUIThemeMutation.mutate({ theme: newTheme });
  };

  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={() => handleThemeChange("light")}>
          <Sun className="mr-2 h-4 w-4" />
          <span>Light</span>
        </DropdownMenuItem>
        <DropdownMenuItem onClick={() => handleThemeChange("dark")}>
          <Moon className="mr-2 h-4 w-4" />
          <span>Dark</span>
        </DropdownMenuItem>
        <DropdownMenuItem onClick={() => handleThemeChange("system")}>
          <Monitor className="mr-2 h-4 w-4" />
          <span>System</span>
        </DropdownMenuItem>
      </DropdownMenuContent>
    </DropdownMenu>
  );
}
