using MassTransit;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Logging;
using Musify.Application.Contracts;
using Musify.Domain.ValueObjects;
using Musify.Infrastructure.MassTransit.Arguments;
using Musify.Infrastructure.MassTransit.Logs;

namespace Musify.Infrastructure.MassTransit.Activities.UploadIntents
{
    internal class ConsumeUploadIntentsActivity(
        IDatabase database,
        ILogger<ConsumeUploadIntentsActivity> logger)
        : IActivity<ConsumeUploadIntentsArguments, ConsumeUploadIntentsLog>
    {
        public const string ExecuteEndpointName = "consume-upload-intents";

        public async Task<ExecutionResult> Execute(ExecuteContext<ConsumeUploadIntentsArguments> executeContext)
        {
            var intentIds = executeContext.Arguments.IntentIds;

            var intents = await database.UploadIntents
                .Where(i => intentIds.Contains(i.Id))
                .ToListAsync(executeContext.CancellationToken);

            foreach (var intent in intents)
                intent.Status = UploadIntentStatus.Consumed;

            await database.SaveChangesAsync(executeContext.CancellationToken);

            logger.LogInformation("Marked {Count} upload intent(s) as consumed", intents.Count);

            return executeContext.Completed(new ConsumeUploadIntentsLog(intentIds));
        }

        public async Task<CompensationResult> Compensate(CompensateContext<ConsumeUploadIntentsLog> compensateContext)
        {
            try
            {
                var intentIds = compensateContext.Log.IntentIds;

                var intents = await database.UploadIntents
                    .Where(i => intentIds.Contains(i.Id))
                    .ToListAsync(compensateContext.CancellationToken);

                foreach (var intent in intents)
                    intent.Status = UploadIntentStatus.Issued;

                await database.SaveChangesAsync(compensateContext.CancellationToken);

                logger.LogInformation("Reverted {Count} upload intent(s) back to Issued", intents.Count);

                return compensateContext.Compensated();
            }
            catch (Exception exception)
            {
                logger.LogError(exception, "Failed to compensate upload intent consumption");
                return compensateContext.Failed(exception);
            }
        }
    }
}