using System;
using System.Threading;
using System.Threading.Tasks;
using Flowsharp.Models;
using Flowsharp.Results;

namespace Flowsharp.Handlers
{
    public interface IActivityHandler
    {
        /// <summary>
        /// The type of activity handled by this handler.
        /// </summary>
        Type ActivityType { get; }
        
        /// <summary>
        /// Returns a value of whether the specified activity can execute.
        /// </summary>
        Task<bool> CanExecuteAsync(IActivity activity, WorkflowExecutionContext workflowContext, CancellationToken cancellationToken);

        /// <summary>
        /// Executes the specified activity.
        /// </summary>
        Task<ActivityExecutionResult> ExecuteAsync(IActivity activity, WorkflowExecutionContext workflowContext, CancellationToken cancellationToken);

        /// <summary>
        /// Resumes the specified activity.
        /// </summary>
        Task<ActivityExecutionResult> ResumeAsync(IActivity activity, WorkflowExecutionContext workflowContext, CancellationToken cancellationToken);
    }
}