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export type ToastVariant = "success" | "error" | "info";
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export interface Toast {
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  id: number;
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  message: string;
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  variant: ToastVariant;
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  exiting?: boolean;
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}
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let nextId = 0;
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let toasts: Toast[] = [];
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const listeners = new Set<() => void>();
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function emit() {
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  for (const listener of listeners) listener();
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}
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function add(message: string, variant: ToastVariant) {
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  const id = ++nextId;
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  toasts = [{ id, message, variant }, ...toasts].slice(0, 3);
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  emit();
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  setTimeout(() => {
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    toasts = toasts.map((toast) => (toast.id === id ? { ...toast, exiting: true } : toast));
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    emit();
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  }, 3800);
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  setTimeout(() => {
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    toasts = toasts.filter((toast) => toast.id !== id);
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    emit();
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  }, 4000);
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}
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export function subscribeToast(listener: () => void) {
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  listeners.add(listener);
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  return () => listeners.delete(listener);
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}
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export function getToastSnapshot() {
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  return toasts;
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}
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export const toast = {
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  success: (message: string) => add(message, "success"),
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  error: (message: string) => add(message, "error"),
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  info: (message: string) => add(message, "info"),
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};