using System;
using System.Collections.Generic;
using System.Diagnostics.SymbolStore;
using System.Linq;
using System.Runtime.CompilerServices;
using FluentAssertions;
using FluentAssertions.Common;
using Xunit;

namespace Speckle.InterfaceGenerator.Tests;

public class AccessorsGenerationTests
{
    private readonly IAccessorsTestsService _sut;

    public AccessorsGenerationTests()
    {
        _sut = new AccessorsTestsService();
    }

    [Fact]
    public void GetSetIndexer_IsImplemented()
    {
        var indexer = typeof(IAccessorsTestsService)
            .GetProperties()
            .First(x =>
                x.GetIndexParameters().Select(x => x.ParameterType).Contains(typeof(string))
            );

        indexer.Should().NotBeNull();

        indexer.GetMethod.Should().NotBeNull();
        indexer.SetMethod.Should().NotBeNull();

        var _ = _sut[string.Empty];
        _sut[string.Empty] = 0;
    }

    [Fact]
    public void PublicProperty_IsImplemented()
    {
        var prop =
            typeof(IAccessorsTestsService).GetProperty(
                nameof(IAccessorsTestsService.PublicProperty)
            ) ?? throw new InvalidOperationException();

        prop.Should().NotBeNull();

        prop.GetMethod.Should().NotBeNull();
        prop.SetMethod.Should().NotBeNull();

        var _ = _sut.PublicProperty;
        _sut.PublicProperty = string.Empty;
    }

    [Fact]
    public void InitProperty_IsImplemented()
    {
        var prop =
            typeof(IAccessorsTestsService).GetProperty(
                nameof(IAccessorsTestsService.InitOnlyProperty)
            ) ?? throw new InvalidOperationException();

        prop.Should().NotBeNull();

        prop.GetMethod.Should().NotBeNull();
        prop.SetMethod.Should().NotBeNull();

        prop.SetMethod?.ReturnParameter?.GetRequiredCustomModifiers()
            .Should()
            .Contain(typeof(IsExternalInit));

        var _ = _sut.InitOnlyProperty;
    }

    [Fact]
    public void PrivateSetter_IsOmitted()
    {
        var prop =
            typeof(IAccessorsTestsService).GetProperty(
                nameof(IAccessorsTestsService.PropertyWithPrivateSetter)
            ) ?? throw new InvalidOperationException();

        prop.Should().NotBeNull();

        prop.GetMethod.Should().NotBeNull();
        prop.SetMethod.Should().BeNull();

        var _ = _sut.PropertyWithPrivateSetter;
    }

    [Fact]
    public void PrivateGetter_IsOmitted()
    {
        var prop =
            typeof(IAccessorsTestsService).GetProperty(
                nameof(IAccessorsTestsService.PropertyWithPrivateGetter)
            ) ?? throw new InvalidOperationException();

        prop.Should().NotBeNull();

        prop.SetMethod.Should().NotBeNull();
        prop.GetMethod.Should().BeNull();

        _sut.PropertyWithPrivateGetter = string.Empty;
    }

    [Fact]
    public void ProtectedSetter_IsOmitted()
    {
        var prop =
            typeof(IAccessorsTestsService).GetProperty(
                nameof(IAccessorsTestsService.PropertyWithProtectedSetter)
            ) ?? throw new InvalidOperationException();

        prop.Should().NotBeNull();

        prop.GetMethod.Should().NotBeNull();
        prop.SetMethod.Should().BeNull();

        var _ = _sut.PropertyWithProtectedSetter;
    }

    [Fact]
    public void ProtectedGetter_IsOmitted()
    {
        var prop =
            typeof(IAccessorsTestsService).GetProperty(
                nameof(IAccessorsTestsService.PropertyWithProtectedGetter)
            ) ?? throw new InvalidOperationException();

        prop.Should().NotBeNull();

        prop.SetMethod.Should().NotBeNull();
        prop.GetMethod.Should().BeNull();

        _sut.PropertyWithProtectedGetter = string.Empty;
    }

    [Fact]
    public void IgnoredProperty_IsOmitted()
    {
        var prop = typeof(IAccessorsTestsService).GetProperty(
            nameof(AccessorsTestsService.IgnoredProperty)
        );

        prop.Should().BeNull();
    }

    [Fact]
    public void StaticProperty_IsOmitted()
    {
        var prop = typeof(IAccessorsTestsService).GetProperty(
            nameof(AccessorsTestsService.StaticProperty)
        );

        prop.Should().BeNull();
    }
}

// ReSharper disable UnusedMember.Local, ValueParameterNotUsed
[GenerateAutoInterface]
internal class AccessorsTestsService : IAccessorsTestsService
{
    public int this[string x]
    {
        get => 0;
        set { }
    }
    public FtpStyleUriParser? SymbolBinder { get; set; }
    public FtpStyleUriParser SymbolBinder2 { get; set; } = default!;
    public IEnumerable<FtpStyleUriParser> SymbolBinder3 { get; set; }= default!;

    public string PublicProperty { get; set; } = string.Empty;

    public string InitOnlyProperty { get; init; } = string.Empty;

    public string PropertyWithPrivateSetter { get; private set; } = string.Empty;

    public string PropertyWithPrivateGetter { private get; set; } = string.Empty;

    public string PropertyWithProtectedSetter { get; protected set; } = string.Empty;

    public string PropertyWithProtectedGetter { protected get; set; } = string.Empty;

    [AutoInterfaceIgnore]
    public string IgnoredProperty { get; set; } = string.Empty;

    public static string StaticProperty { get; set; } = string.Empty;
}
// ReSharper enable UnusedMember.Local, ValueParameterNotUsed