import { useState, useCallback } from 'react';

/**
 * Toast message type
 */
export type ToastType = 'success' | 'error' | 'warning' | 'info';

/**
 * Toast message object
 */
export interface Toast {
  id: string;
  type: ToastType;
  message: string;
  duration?: number;
}

/**
 * Toast configuration options
 */
export interface ToastOptions {
  /**
   * Duration in milliseconds before auto-dismiss
   * @default 5000
   */
  duration?: number;

  /**
   * Maximum number of toasts to show at once
   * @default 5
   */
  maxToasts?: number;
}

/**
 * Return type for useToast hook
 */
export interface UseToastReturn {
  /**
   * Array of active toasts
   */
  toasts: Toast[];

  /**
   * Show a success toast
   */
  success: (message: string, duration?: number) => void;

  /**
   * Show an error toast
   */
  error: (message: string, duration?: number) => void;

  /**
   * Show a warning toast
   */
  warning: (message: string, duration?: number) => void;

  /**
   * Show an info toast
   */
  info: (message: string, duration?: number) => void;

  /**
   * Show a toast with custom type
   */
  show: (type: ToastType, message: string, duration?: number) => void;

  /**
   * Dismiss a toast by ID
   */
  dismiss: (id: string) => void;

  /**
   * Dismiss all toasts
   */
  dismissAll: () => void;
}

/**
 * Hook for managing toast notifications
 *
 * Provides a simple API for showing and managing toast messages with
 * automatic dismissal and maximum toast limits.
 *
 * @example
 * ```typescript
 * function MyComponent() {
 *   const toast = useToast({ duration: 3000 });
 *
 *   const handleClick = () => {
 *     toast.success('Operation successful!');
 *   };
 *
 *   return (
 *     <div>
 *       <button onClick={handleClick}>Show Toast</button>
 *       {toast.toasts.map((t) => (
 *         <ToastMessage
 *           key={t.id}
 *           type={t.type}
 *           message={t.message}
 *           onDismiss={() => toast.dismiss(t.id)}
 *         />
 *       ))}
 *     </div>
 *   );
 * }
 * ```
 */
export function useToast(options: ToastOptions = {}): UseToastReturn {
  const { duration: defaultDuration = 5000, maxToasts = 5 } = options;

  const [toasts, setToasts] = useState<Toast[]>([]);

  const show = useCallback(
    (type: ToastType, message: string, duration: number = defaultDuration) => {
      const id = `toast-${Date.now()}-${Math.random().toString(36).substr(2, 9)}`;

      const newToast: Toast = {
        id,
        type,
        message,
        duration,
      };

      setToasts((prev) => {
        // Add new toast and enforce maxToasts limit
        const updated = [...prev, newToast];
        if (updated.length > maxToasts) {
          return updated.slice(updated.length - maxToasts);
        }
        return updated;
      });

      // Auto-dismiss after duration
      if (duration > 0) {
        setTimeout(() => {
          setToasts((prev) => prev.filter((t) => t.id !== id));
        }, duration);
      }
    },
    [defaultDuration, maxToasts]
  );

  const success = useCallback(
    (message: string, duration?: number) => {
      show('success', message, duration);
    },
    [show]
  );

  const error = useCallback(
    (message: string, duration?: number) => {
      show('error', message, duration);
    },
    [show]
  );

  const warning = useCallback(
    (message: string, duration?: number) => {
      show('warning', message, duration);
    },
    [show]
  );

  const info = useCallback(
    (message: string, duration?: number) => {
      show('info', message, duration);
    },
    [show]
  );

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

  const dismissAll = useCallback(() => {
    setToasts([]);
  }, []);

  return {
    toasts,
    success,
    error,
    warning,
    info,
    show,
    dismiss,
    dismissAll,
  };
}