"use client";

import { createContext, useContext, useState, useCallback, ReactNode } from "react";
import { X } from "lucide-react";
import { Alert, AlertTitle, AlertDescription } from "@/components/ui/alert";

interface Toast {
  id: string;
  type: "success" | "error" | "info";
  title: string;
  description?: string;
}

interface ToastContextType {
  toasts: Toast[];
  addToast: (toast: Omit<Toast, "id">) => void;
  removeToast: (id: string) => void;
}

const ToastContext = createContext<ToastContextType | null>(null);

export function ToastProvider({ children }: { children: ReactNode }) {
  const [toasts, setToasts] = useState<Toast[]>([]);

  const addToast = useCallback((toast: Omit<Toast, "id">) => {
    const id = Math.random().toString(36).substring(2, 9);
    setToasts((prev) => [...prev, { ...toast, id }]);

    // Auto remove after 4 seconds
    setTimeout(() => {
      setToasts((prev) => prev.filter((t) => t.id !== id));
    }, 4000);
  }, []);

  const removeToast = useCallback((id: string) => {
    setToasts((prev) => prev.filter((t) => t.id !== id));
  }, []);

  return (
    <ToastContext.Provider value={{ toasts, addToast, removeToast }}>
      {children}
      {/* Toast Container */}
      <div className="fixed bottom-4 right-4 z-[100] flex flex-col gap-2 max-w-sm">
        {toasts.map((toast) => (
          <Alert key={toast.id} variant={toast.type === "error" ? "destructive" : "default"}>
            <AlertTitle>{toast.title}</AlertTitle>
            {toast.description && (
              <AlertDescription>{toast.description}</AlertDescription>
            )}
            <div className="absolute top-2.5 right-3 flex items-center gap-1">
              <button
                onClick={() => removeToast(toast.id)}
                className="rounded-sm p-1 hover:bg-muted"
              >
                <X className="h-4 w-4" />
              </button>
            </div>
          </Alert>
        ))}
      </div>
    </ToastContext.Provider>
  );
}

export function useToast() {
  const context = useContext(ToastContext);
  if (!context) {
    throw new Error("useToast must be used within a ToastProvider");
  }
  return context;
}