src/components/ui/toaster.tsx

"use client";

import * as React from "react";
import * as ToastPrimitives from "@radix-ui/react-toast";
import { cva, type VariantProps } from "class-variance-authority";
import { X } from "lucide-react";
import { cn } from "@/lib/utils";

const ToastProvider = ToastPrimitives.Provider;

const ToastViewport = React.forwardRef<
    React.ElementRef<typeof ToastPrimitives.Viewport>,
    React.ComponentPropsWithoutRef<typeof ToastPrimitives.Viewport>
>(({ className, ...props }, ref) => (
    <ToastPrimitives.Viewport
        ref={ref}
        className={cn(
            "fixed top-0 z-[100] flex max-h-screen w-full flex-col-reverse p-4 sm:bottom-0 sm:right-0 sm:top-auto sm:flex-col md:max-w-[420px]",
            className
        )}
        {...props}
    />
));
ToastViewport.displayName = ToastPrimitives.Viewport.displayName;

const toastVariants = cva(
    "group pointer-events-auto relative flex w-full items-center justify-between space-x-4 overflow-hidden rounded-md border p-6 pr-8 shadow-lg transition-all data-[swipe=cancel]:translate-x-0 data-[swipe=end]:translate-x-[var(--radix-toast-swipe-end-x)] data-[swipe=move]:translate-x-[var(--radix-toast-swipe-move-x)] data-[swipe=move]:transition-none data-[state=open]:animate-in data-[state=closed]:animate-out data-[swipe=end]:animate-out data-[state=closed]:fade-out-80 data-[state=closed]:slide-out-to-right-full data-[state=open]:slide-in-from-top-full data-[state=open]:sm:slide-in-from-bottom-full",
    {
        variants: {
            variant: {
                default: "border bg-background text-foreground",
                destructive: "destructive group border-destructive bg-destructive text-destructive-foreground",
            },
        },
        defaultVariants: {
            variant: "default",
        },
    }
);

const Toast = React.forwardRef<
    React.ElementRef<typeof ToastPrimitives.Root>,
    React.ComponentPropsWithoutRef<typeof ToastPrimitives.Root> & VariantProps<typeof toastVariants>
>(({ className, variant, ...props }, ref) => {
    return (
        <ToastPrimitives.Root
            ref={ref}
            className={cn(toastVariants({ variant }), className)}
            {...props}
        />
    );
});
Toast.displayName = ToastPrimitives.Root.displayName;

const ToastAction = React.forwardRef<
    React.ElementRef<typeof ToastPrimitives.Action>,
    React.ComponentPropsWithoutRef<typeof ToastPrimitives.Action>
>(({ className, ...props }, ref) => (
    <ToastPrimitives.Action
        ref={ref}
        className={cn(
            "inline-flex h-8 shrink-0 items-center justify-center rounded-md border bg-transparent px-3 text-sm font-medium ring-offset-background transition-colors hover:bg-secondary focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2 disabled:pointer-events-none disabled:opacity-50 group-[.destructive]:border-muted/40 group-[.destructive]:hover:border-destructive/30 group-[.destructive]:hover:bg-destructive group-[.destructive]:hover:text-destructive-foreground group-[.destructive]:focus:ring-destructive",
            className
        )}
        {...props}
    />
));
ToastAction.displayName = ToastPrimitives.Action.displayName;

const ToastClose = React.forwardRef<
    React.ElementRef<typeof ToastPrimitives.Close>,
    React.ComponentPropsWithoutRef<typeof ToastPrimitives.Close>
>(({ className, ...props }, ref) => (
    <ToastPrimitives.Close
        ref={ref}
        className={cn(
            "absolute right-2 top-2 rounded-md p-1 text-foreground/50 opacity-0 transition-opacity hover:text-foreground focus:opacity-100 focus:outline-none focus:ring-2 group-hover:opacity-100 group-[.destructive]:text-red-300 group-[.destructive]:hover:text-red-50 group-[.destructive]:focus:ring-red-400 group-[.destructive]:focus:ring-offset-red-600",
            className
        )}
        toast-close=""
        {...props}
    >
        <X className="h-4 w-4" />
    </ToastPrimitives.Close>
));
ToastClose.displayName = ToastPrimitives.Close.displayName;

const ToastTitle = React.forwardRef<
    React.ElementRef<typeof ToastPrimitives.Title>,
    React.ComponentPropsWithoutRef<typeof ToastPrimitives.Title>
>(({ className, ...props }, ref) => (
    <ToastPrimitives.Title ref={ref} className={cn("text-sm font-semibold", className)} {...props} />
));
ToastTitle.displayName = ToastPrimitives.Title.displayName;

const ToastDescription = React.forwardRef<
    React.ElementRef<typeof ToastPrimitives.Description>,
    React.ComponentPropsWithoutRef<typeof ToastPrimitives.Description>
>(({ className, ...props }, ref) => (
    <ToastPrimitives.Description ref={ref} className={cn("text-sm opacity-90", className)} {...props} />
));
ToastDescription.displayName = ToastPrimitives.Description.displayName;

type ToastProps = React.ComponentPropsWithoutRef<typeof Toast>;
type ToastActionElement = React.ReactElement<typeof ToastAction>;

interface ToastState {
    toasts: Array<{
        id: string;
        title?: string;
        description?: string;
        action?: ToastActionElement;
        variant?: "default" | "destructive";
    }>;
}

const toastState: ToastState = { toasts: [] };
const listeners: Array<() => void> = [];

function dispatch() {
    listeners.forEach((listener) => listener());
}

export function toast({
    title,
    description,
    variant = "default",
}: {
    title?: string;
    description?: string;
    variant?: "default" | "destructive";
}) {
    const id = Math.random().toString(36).substring(2, 9);
    toastState.toasts.push({ id, title, description, variant });
    dispatch();
    setTimeout(() => {
        toastState.toasts = toastState.toasts.filter((t) => t.id !== id);
        dispatch();
    }, 5000);
}

function useToastState() {
    const [state, setState] = React.useState(toastState);
    React.useEffect(() => {
        const listener = () => setState({ ...toastState });
        listeners.push(listener);
        return () => {
            const index = listeners.indexOf(listener);
            if (index > -1) listeners.splice(index, 1);
        };
    }, []);
    return state;
}

function Toaster() {
    const state = useToastState();

    return (
        <ToastProvider>
            {state.toasts.map((t) => (
                <Toast key={t.id} variant={t.variant}>
                    <div className="grid gap-1">
                        {t.title && <ToastTitle>{t.title}</ToastTitle>}
                        {t.description && <ToastDescription>{t.description}</ToastDescription>}
                    </div>
                    <ToastClose />
                </Toast>
            ))}
            <ToastViewport />
        </ToastProvider>
    );
}

export {
    type ToastProps,
    type ToastActionElement,
    ToastProvider,
    ToastViewport,
    Toast,
    ToastTitle,
    ToastDescription,
    ToastClose,
    ToastAction,
    Toaster,
};