using System;
using System.Collections.Generic;
using System.Linq.Expressions;
using System.Reflection;
using Luticate2.Auth.Business;
using Luticate2.Auth.Business.Fields;
using Luticate2.Auth.Business.Fields.DMEC;
using Luticate2.Auth.Dbo;
using Luticate2.Auth.Dbo.Result;
using Luticate2.Auth.Interfaces;
using Microsoft.Extensions.DependencyInjection;
using Xunit;

namespace Luticate2.Auth.Tests.Business.Fields
{
    public class TestDbo1
    {
        public Guid Id { get; set; }

        public string Name { get; set; }

        public IList<TestDbo2> TestDbo2s { get; set; }
    }

    public class TestDbo2
    {
        public Guid Id { get; set; }

        public string Name { get; set; }

        public TestDbo1 TestDbo1 { get; set; }
    }

    public class TestModel1
    {
        public Guid Id { get; set; }

        public string Name { get; set; }

        public ICollection<TestModel2> TestModel2 { get; set; }
    }

    public class TestModel2
    {
        public Guid Id { get; set; }

        public string Name { get; set; }

        public Guid TestModel1Id { get; set; }

        public TestModel1 TestModel1 { get; set; }
    }

    public class LuDMECTest1 : LuExpressionConverter<TestDbo1, TestModel1>
    {
        public LuDMECTest1(IServiceProvider serviceProvider) : base(serviceProvider)
        {
        }

        protected override LuResult<Expression> ConvertInternal(Stack<Expression> expressions, Expression baseExpression, LuExpressionConverterOptions options)
        {
            var expression = expressions.Peek();
            if (expression is MemberExpression memberExpression)
            {
                if (MemberMatch(x => x.Id, memberExpression))
                {
                    return MakeMemberAccess(x => x.Id, expressions, baseExpression, options);
                }
                if (MemberMatch(x => x.Name, memberExpression))
                {
                    return MakeMemberAccess(x => x.Name, expressions, baseExpression, options);
                }
                if (MemberMatch(x => x.TestDbo2s, memberExpression))
                {
                    return MakeMemberAccess(x => x.TestModel2, expressions, baseExpression, options);
                }
            }

            return base.ConvertInternal(expressions, baseExpression, options);
        }
    }

    public class LuDMECTest2 : LuExpressionConverter<TestDbo2, TestModel2>
    {
        public LuDMECTest2(IServiceProvider serviceProvider) : base(serviceProvider)
        {
        }

        protected override LuResult<Expression> ConvertInternal(Stack<Expression> expressions, Expression baseExpression, LuExpressionConverterOptions options)
        {
            var expression = expressions.Peek();
            if (expression is MemberExpression memberExpression)
            {
                if (MemberMatch(x => x.Id, memberExpression))
                {
                    return MakeMemberAccess(x => x.Id, expressions, baseExpression, options);
                }
                if (MemberMatch(x => x.Name, memberExpression))
                {
                    return MakeMemberAccess(x => x.Name, expressions, baseExpression, options);
                }
                if (MemberMatch(x => x.TestDbo1, memberExpression))
                {
                    return MakeMemberAccess(x => x.TestModel1, expressions, baseExpression, options);
                }
            }

            return base.ConvertInternal(expressions, baseExpression, options);
        }
    }

    public class LuDboModelExpressionConverterTests
    {
        public IServiceProvider GetServiceProvider()
        {
            var services = new ServiceCollection();
            services.AddSingleton<ILuExpressionConverter<TestDbo1, TestModel1>, LuDMECTest1>();
            services.AddSingleton<ILuExpressionConverter<TestDbo2, TestModel2>, LuDMECTest2>();
            services.AddSingleton<ILuExpressionConverter<string, string>, LuExpressionConverterIdentity<string>>();
            services.AddSingleton<ILuExpressionConverter<Guid, Guid>, LuExpressionConverterIdentity<Guid>>();

            var serviceProvider = services.BuildServiceProvider();
            return serviceProvider;
        }

//        [Fact]
//        public void Test0()
//        {
//            var serviceProvider = GetServiceProvider();
//            var converter = serviceProvider.GetService<ILuDboModelExpressionConverter<TestDbo1, TestModel1>>();
//            Expression<Func<TestDbo1, TestDbo1>> expDbo = (x => x);
//            Expression<Func<TestModel1, object>> expModel = (x => (object) x);
//            var convertResult = converter.ConvertLamdba(expDbo);
//            Assert.Equal(LuStatus.Success.ToInt(), convertResult.Status);
//            Assert.NotNull(convertResult.Data);
//            Assert.Equal(expModel.ToString(), convertResult.Data.ToString());
//        }
//
//        [Fact]
//        public void Test1()
//        {
//            var serviceProvider = GetServiceProvider();
//            var converter = serviceProvider.GetService<ILuDboModelExpressionConverter<TestDbo1, TestModel1>>();
//            Expression<Func<TestDbo1, Guid>> expDbo = (x => x.Id);
//            Expression<Func<TestModel1, object>> expModel = (x => (object) x.Id);
//            var convertResult = converter.ConvertLamdba(expDbo);
//            Assert.Equal(LuStatus.Success.ToInt(), convertResult.Status);
//            Assert.NotNull(convertResult.Data);
//            Assert.Equal(expModel.ToString(), convertResult.Data.ToString());
//        }
//
//        [Fact]
//        public void Test2()
//        {
//            var serviceProvider = GetServiceProvider();
//            var converter = serviceProvider.GetService<ILuDboModelExpressionConverter<TestDbo2, TestModel2>>();
//            Expression<Func<TestDbo2, Guid>> expDbo = (x => x.TestDbo1.Id);
//            Expression<Func<TestModel2, object>> expModel = (x => (object) x.TestModel1.Id);
//            var convertResult = converter.ConvertLamdba(expDbo);
//            Assert.Equal(LuStatus.Success.ToInt(), convertResult.Status);
//            Assert.NotNull(convertResult.Data);
//            Assert.Equal(expModel.ToString(), convertResult.Data.ToString());
//        }
//
//        [Fact]
//        public void Test3()
//        {
//            var serviceProvider = GetServiceProvider();
//            var converter = serviceProvider.GetService<ILuDboModelExpressionConverter<TestDbo2, TestModel2>>();
//            Expression<Func<TestDbo2, int>> expDbo = (x => x.TestDbo1.Name.Length);
//            Expression<Func<TestModel2, object>> expModel = (x => (object) x.TestModel1.Name.Length);
//            var convertResult = converter.ConvertLamdba(expDbo);
//            Assert.Equal(LuStatus.Success.ToInt(), convertResult.Status);
//            Assert.NotNull(convertResult.Data);
//            Assert.Equal(expModel.ToString(), convertResult.Data.ToString());
//        }
//
//        [Fact]
//        public void Test4()
//        {
//            var serviceProvider = GetServiceProvider();
//            var converter = serviceProvider.GetService<ILuDboModelExpressionConverter<TestDbo2, TestModel2>>();
//            Expression<Func<TestDbo2, bool>> expDbo = (x => x.TestDbo1.Name.Length == 0 || x.Name.Length != 0);
//            Expression<Func<TestModel2, object>> expModel = (x => (object) (x.TestModel1.Name.Length == 0 || x.Name.Length != 0));
//            var convertResult = converter.ConvertLamdba(expDbo);
//            Assert.Equal(LuStatus.Success.ToInt(), convertResult.Status);
//            Assert.NotNull(convertResult.Data);
//            Assert.Equal(expModel.ToString(), convertResult.Data.ToString());
//        }
    }
}