using System;
using Microsoft.AspNet.OData.Builder;
using Microsoft.AspNet.OData.Extensions;
using Microsoft.AspNetCore.Builder;
using Microsoft.OData;
using Microsoft.AspNetCore.Hosting;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Microsoft.OData.Edm;
using SampleODataApp.Models;

namespace SampleODataApp
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddDbContext<SampleODataDbContext>(options =>
            {
                options.UseInMemoryDatabase("InMemoryDb");
            });

            services.AddODataQueryFilter();
            services.AddOData();
            services.AddMvc();
        }
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseMvc(routebuilder =>
            {
                routebuilder.MapODataServiceRoute("odata", "odata", GetEdmModel(routebuilder.ServiceProvider));
            });
        }

        private IEdmModel GetEdmModel(IServiceProvider serviceProvider)
        {
            var builder = new ODataConventionModelBuilder(serviceProvider);
            builder.EntitySet<Person>(nameof(Person));
            return builder.GetEdmModel();
        }
    }
}

[EnableQuery(
            AllowedQueryOptions = AllowedQueryOptions.All,
            AllowedLogicalOperators = AllowedLogicalOperators.All,
            AllowedArithmeticOperators = AllowedArithmeticOperators.All,
            AllowedFunctions = AllowedFunctions.All, 
            MaxTop = 100,
            PageSize = 100
)]
public IQueryable<Person> Get()
{
         return _sampleODataDbContext.Persons.AsQueryable();
}