using LCU.API.Internal.DocumentLib.Containers;
using Microsoft.Extensions.Logging;

namespace OwnerNumberMigration.Logging;

public delegate IObserver<DocumentInformation> AttributeMigrationLoggingObserverFactory(string attributeName);

public class AttributeMigrationLoggingObserver : IObserver<DocumentInformation>
{
    private readonly ILogger _logger;
    private readonly string _attributeName;

    public AttributeMigrationLoggingObserver(ILogger logger, string attributeName)
    {
        _logger = logger;
        _attributeName = attributeName;
    }

    public void OnCompleted()
    {
        _logger.LogInformation("completed one migration for {attribute}", _attributeName);
    }

    public void OnError(Exception error)
    {
        _logger.LogError("migration error {error} in migration for {attribute}", error, _attributeName);
    }

    public void OnNext(DocumentInformation value)
    {
        _logger.LogInformation("starting one migration for {attribute} on {documentId}", _attributeName, value.DocumentId);
    }
}