using ECMJobRunner.Application.Common.Exceptions;
using ECMJobRunner.Application.ProfileHistories.Commands;
using ECMJobRunner.Domain.ValueObjects;
using MediatR;
using Microsoft.Extensions.Logging;
using System.Threading;
using System.Threading.Tasks;

namespace ECMJobRunner.Application.Profiles.Commands.Behaviors;

/// <summary>
/// Pipeline behavior that catches <see cref="ECMJobRunner.Application.Common.Exceptions.JobException"/> exceptions,
/// persists a profile history error record and re-throws the exception
/// </summary>
/// <typeparam name="TRequest">The type of the MediatR request</typeparam>
/// <typeparam name="TResponse">The type of the MediatR response</typeparam>
/// <param name="Sender">MediatR sender used to dispatch the <see cref="ECMJobRunner.Application.ProfileHistories.Commands.CreateProfileHistoryCommand"/></param>
/// <param name="Logger">Logger for diagnostic output.</param>
public class JobExceptionHandlingBehavior<TRequest, TResponse>(ISender Sender, ILogger<JobExceptionHandlingBehavior<TRequest, TResponse>> Logger) : IPipelineBehavior<TRequest, TResponse> where TRequest : notnull
{
    /// <summary>
    /// Handles the pipeline behavior
    /// Executes main query if request is TriggeringDEXJobCommand
    /// </summary>
#if NET48
    public async Task<TResponse> Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate<TResponse> next)
#else
        public async Task<TResponse> Handle(TRequest request, RequestHandlerDelegate<TResponse> next, CancellationToken cancellationToken)
#endif
    {
        try
        {
            return await next();
        }
        catch (JobException ex)
        {
            var cmd = new CreateProfileHistoryCommand()
            {
                ProfileId = ex.ProfileId,
                Result = ResultType.Ok,
                ResultText = ex.ToString(),
                AddedWho = "ECMJobRunner"
            };
            await Sender.Send(cmd, cancellationToken);

            Logger.LogWarning(ex, "JobException caught in JobExceptionHandlingBehavior for ProfileId {ProfileId}, JobName {JobName}, ProcessName {ProcessName}, BatchId {BatchId}", ex.ProfileId, ex.JobName, ex.ProcessName, ex.BatchId);

            return default!;
        }
    }
}