using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Columns;
using BenchmarkDotNet.Configs;
using BenchmarkDotNet.Reports;
using Microsoft.EntityFrameworkCore;
using System.Threading.Tasks;

namespace EntityFrameworkBenchmarks;

[Config(typeof(Config))]
public class BatchSizeBenchmark
{
    [Params(1000)]
    public int records;

    [Params(50, 100, 150, 200)]
    public int batchSize;

    [GlobalSetup]
    public void GlobalSetup()
    {
        using var context = new BloggingContext();
        context.Database.EnsureDeleted();
        context.Database.EnsureCreated();
    }

    [Benchmark]
    public async Task InsertRows()
    {
        var db = new BloggingContext(batchSize);

        for (var i = 0; i < records; i++)
        {
            var blog = new Blog { Name = "Foo" + i, Url = "Bar" + i };
            db.Blogs.Add(blog);
        }

        await db.SaveChangesAsync();
    }

    private class Config : ManualConfig
    {
        public Config()
        {
            SummaryStyle =
                SummaryStyle.Default
                .WithRatioStyle(RatioStyle.Trend)
                .WithTimeUnit(Perfolizer.Horology.TimeUnit.Millisecond);
        }
    }
}

public class BloggingContext : DbContext
{
    private int _batchSize;

    public BloggingContext(int batchSize = 42)
    {
        _batchSize = batchSize;
    }

    public DbSet<Blog> Blogs { get; set; }

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        => optionsBuilder.UseSqlServer(
            @"Server=localhost;Database=efsamples;Trusted_Connection=True;TrustServerCertificate=true",
            optionsBuilder => optionsBuilder.MaxBatchSize(_batchSize));
}

public class Blog
{
    public int BlogId { get; set; }
    public string Name { get; set; }
    public string Url { get; set; }
    public int Rating { get; set; }
}

// .NET 8 Lowered C# Code unavailable due to errors:
error CS0234: The type or namespace name 'EntityFrameworkCore' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?)
error CS0246: The type or namespace name 'DbContext' could not be found (are you missing a using directive or an assembly reference?)
error CS0246: The type or namespace name 'DbSet<>' could not be found (are you missing a using directive or an assembly reference?)
error CS0246: The type or namespace name 'DbContextOptionsBuilder' could not be found (are you missing a using directive or an assembly reference?)
error CS1674: 'BloggingContext': type used in a using statement must be implicitly convertible to 'System.IDisposable'.
error CS1061: 'BloggingContext' does not contain a definition for 'Database' and no accessible extension method 'Database' accepting a first argument of type 'BloggingContext' could be found (are you missing a using directive or an assembly reference?)
error CS1061: 'BloggingContext' does not contain a definition for 'SaveChangesAsync' and no accessible extension method 'SaveChangesAsync' accepting a first argument of type 'BloggingContext' could be found (are you missing a using directive or an assembly reference?)

// .NET 8 IL Code unavailable due to errors:
error CS0234: The type or namespace name 'EntityFrameworkCore' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?)
error CS0246: The type or namespace name 'DbContext' could not be found (are you missing a using directive or an assembly reference?)
error CS0246: The type or namespace name 'DbSet<>' could not be found (are you missing a using directive or an assembly reference?)
error CS0246: The type or namespace name 'DbContextOptionsBuilder' could not be found (are you missing a using directive or an assembly reference?)
error CS1674: 'BloggingContext': type used in a using statement must be implicitly convertible to 'System.IDisposable'.
error CS1061: 'BloggingContext' does not contain a definition for 'Database' and no accessible extension method 'Database' accepting a first argument of type 'BloggingContext' could be found (are you missing a using directive or an assembly reference?)
error CS1061: 'BloggingContext' does not contain a definition for 'SaveChangesAsync' and no accessible extension method 'SaveChangesAsync' accepting a first argument of type 'BloggingContext' could be found (are you missing a using directive or an assembly reference?)