import { Monitor, Moon, Sun } from "lucide-react";
import { Button } from "@/components/ui/button";
import { cn } from "@/lib/utils";
import { useTranslation } from "react-i18next";
import { useTheme } from "@/components/theme-provider";

export function ThemeSettings() {
  const { t } = useTranslation();
  const { theme, setTheme } = useTheme();

  return (
    <section className="space-y-2">
      <header className="space-y-1">
        <h3 className="text-sm font-medium">{t("settings.theme")}</h3>
        <p className="text-xs text-muted-foreground">
          {t("settings.themeHint", {
            defaultValue: "选择应用的外观主题，立即生效。",
          })}
        </p>
      </header>
      <div className="inline-flex gap-1 rounded-md border border-border bg-background p-1">
        <ThemeButton
          active={theme === "light"}
          onClick={() => setTheme("light")}
          icon={Sun}
        >
          {t("settings.themeLight", { defaultValue: "浅色" })}
        </ThemeButton>
        <ThemeButton
          active={theme === "dark"}
          onClick={() => setTheme("dark")}
          icon={Moon}
        >
          {t("settings.themeDark", { defaultValue: "深色" })}
        </ThemeButton>
        <ThemeButton
          active={theme === "system"}
          onClick={() => setTheme("system")}
          icon={Monitor}
        >
          {t("settings.themeSystem", { defaultValue: "跟随系统" })}
        </ThemeButton>
      </div>
    </section>
  );
}

interface ThemeButtonProps {
  active: boolean;
  onClick: () => void;
  icon: React.ComponentType<{ className?: string }>;
  children: React.ReactNode;
}

function ThemeButton({
  active,
  onClick,
  icon: Icon,
  children,
}: ThemeButtonProps) {
  return (
    <Button
      type="button"
      onClick={onClick}
      size="sm"
      variant={active ? "default" : "ghost"}
      className={cn(
        "min-w-[96px] gap-1.5",
        active
          ? "shadow-sm"
          : "text-muted-foreground hover:text-foreground hover:bg-muted",
      )}
    >
      <Icon className="h-3.5 w-3.5" />
      {children}
    </Button>
  );
}