using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Reflection;
using Microsoft.AspNetCore.Mvc.ApplicationParts;
using Microsoft.AspNetCore.Mvc.Controllers;
using Microsoft.Extensions.DependencyInjection;
using OpenHarbor.CQRS.Abstractions.Discovery;
using OpenHarbor.CQRS.AspNetCore.Abstractions.Attributes;
using OpenHarbor.CQRS.DynamicQuery.Discover;

namespace OpenHarbor.CQRS.DynamicQuery.AspNetCore.Mvc;

public class DynamicQueryControllerFeatureProvider(ServiceProvider serviceProvider)
  : IApplicationFeatureProvider<ControllerFeature>
{
  
  /**
   * public void PopulateFeature(IEnumerable<ApplicationPart> parts, ControllerFeature feature)
        {
            var queryDiscovery = this.serviceProvider.GetRequiredService<IQueryDiscovery>();
            foreach (var f in queryDiscovery.GetQueries())
            {
                var ignoreAttribute = f.QueryType.GetCustomAttribute<QueryControllerIgnoreAttribute>();
                if (ignoreAttribute != null)
                    continue;

                if (f.Category != "DynamicQuery")
                    continue;

                if (f is DynamicQueryMeta dynamicQueryMeta)
                {
                    if (dynamicQueryMeta.ParamsType == null)
                    {
                        var controllerType = typeof(DynamicQueryController<,,>).MakeGenericType(f.QueryType, dynamicQueryMeta.SourceType, dynamicQueryMeta.DestinationType);
                        var controllerTypeInfo = controllerType.GetTypeInfo();
                        feature.Controllers.Add(controllerTypeInfo);
                    }
                    else
                    {
                        var controllerType = typeof(DynamicQueryController<,,,>).MakeGenericType(f.QueryType, dynamicQueryMeta.SourceType, dynamicQueryMeta.DestinationType, dynamicQueryMeta.ParamsType);
                        var controllerTypeInfo = controllerType.GetTypeInfo();
                        feature.Controllers.Add(controllerTypeInfo);
                    }
                }
            }
   */
    public void PopulateFeature(IEnumerable<ApplicationPart> parts, ControllerFeature feature)
    {
        var queryDiscovery = serviceProvider.GetRequiredService<IQueryDiscovery>();
        foreach (var queryMeta in queryDiscovery.GetQueries())
        {
            var ignoreAttribute = queryMeta.QueryType.GetCustomAttribute<QueryControllerIgnoreAttribute>();
            if (ignoreAttribute != null)
                continue;

            if (queryMeta.Category != "DynamicQuery")
                continue;

            if (queryMeta is DynamicQueryMeta dynamicQueryMeta)
            {
              // todo: add better error output for the user
              
                if (dynamicQueryMeta.ParamsType == null)
                {
                  // todo: not aot friendly
                    var controllerType = typeof(DynamicQueryController<,,>).MakeGenericType(queryMeta.QueryType, dynamicQueryMeta.SourceType, dynamicQueryMeta.DestinationType);
                    var controllerTypeInfo = controllerType.GetTypeInfo();
                    feature.Controllers.Add(controllerTypeInfo);
                }
                else
                {
                  // todo: not aot friendly
                    var controllerType = typeof(DynamicQueryController<,,,>).MakeGenericType(queryMeta.QueryType, dynamicQueryMeta.SourceType, dynamicQueryMeta.DestinationType, dynamicQueryMeta.ParamsType);
                    var controllerTypeInfo = controllerType.GetTypeInfo();
                    feature.Controllers.Add(controllerTypeInfo);
                }
            }
        }
    }
}