using System;
using System.Linq.Expressions;
using BenchmarkDotNet.Attributes;
using Microsoft.Extensions.Options;
using Moq;
using Umbraco.Cms.Core.Configuration.Models;
using Umbraco.Cms.Core.Models;
using Umbraco.Cms.Infrastructure.Persistence;
using Umbraco.Cms.Infrastructure.Persistence.Mappers;
using Umbraco.Cms.Infrastructure.Persistence.Querying;
using Umbraco.Cms.Infrastructure.Persistence.SqlSyntax;
using Umbraco.Cms.Persistence.SqlServer.Services;

namespace Umbraco.Tests.Benchmarks;

[MemoryDiagnoser]
public class ModelToSqlExpressionHelperBenchmarks
{
    private readonly CachedExpression _cachedExpression;
    private readonly IMapperCollection _mapperCollection;

    private readonly ISqlSyntaxProvider _syntaxProvider =
        new SqlServerSyntaxProvider(Options.Create(new GlobalSettings()));

    public ModelToSqlExpressionHelperBenchmarks()
    {
        var contentMapper = new ContentMapper(MockSqlContext(), CreateMaps());
        _cachedExpression = new CachedExpression();
        var mapperCollection = new Mock<IMapperCollection>();
        mapperCollection.Setup(x => x[It.IsAny<Type>()]).Returns(contentMapper);
        _mapperCollection = mapperCollection.Object;
    }

    protected Lazy<ISqlContext> MockSqlContext()
    {
        var sqlContext = Mock.Of<ISqlContext>();
        var syntax = new SqlServerSyntaxProvider(Options.Create(new GlobalSettings()));
        Mock.Get(sqlContext).Setup(x => x.SqlSyntax).Returns(syntax);
        return new Lazy<ISqlContext>(() => sqlContext);
    }

    protected MapperConfigurationStore CreateMaps() => new();

    [Benchmark(Baseline = true)]
    public void WithNonCached()
    {
        for (var i = 0; i < 100; i++)
        {
            var a = i;
            var b = i * 10;
            Expression<Func<IContent, bool>> predicate = content =>
                content.Path.StartsWith("-1") && content.Published &&
                (content.ContentTypeId == a || content.ContentTypeId == b);

            var modelToSqlExpressionHelper =
                new ModelToSqlExpressionVisitor<IContent>(_syntaxProvider, _mapperCollection);
            var result = modelToSqlExpressionHelper.Visit(predicate);
        }
    }

    [Benchmark]
    public void WithCachedExpression()
    {
        for (var i = 0; i < 100; i++)
        {
            var a = i;
            var b = i * 10;
            Expression<Func<IContent, bool>> predicate = content =>
                content.Path.StartsWith("-1") && content.Published &&
                (content.ContentTypeId == a || content.ContentTypeId == b);

            var modelToSqlExpressionHelper =
                new ModelToSqlExpressionVisitor<IContent>(_syntaxProvider, _mapperCollection);

            //wrap it!
            _cachedExpression.Wrap(predicate);

            var result = modelToSqlExpressionHelper.Visit(_cachedExpression);
        }
    }
}