namespace Spectre.Console.Tests.Unit.Cli;

public sealed partial class CommandAppTests
{
    public sealed class FlagValues
    {
        [SuppressMessage("Performance", "CA1812", Justification = "It's OK")]
        private sealed class FlagSettings : CommandSettings
        {
            [CommandOption("--serve [PORT]")]
            public FlagValue<int> Serve { get; set; }
        }

        [SuppressMessage("Performance", "CA1812", Justification = "It's OK")]
        private sealed class FlagSettingsWithNullableValueType : CommandSettings
        {
            [CommandOption("--serve [PORT]")]
            public FlagValue<int?> Serve { get; set; }
        }

        [SuppressMessage("Performance", "CA1812", Justification = "It's OK")]
        private sealed class FlagSettingsWithOptionalOptionButNoFlagValue : CommandSettings
        {
            [CommandOption("--serve [PORT]")]
            public int Serve { get; set; }
        }

        [SuppressMessage("Performance", "CA1812", Justification = "It's OK")]
        private sealed class FlagSettingsWithDefaultValue : CommandSettings
        {
            [CommandOption("--serve [PORT]")]
            [DefaultValue(987)]
            public FlagValue<int> Serve { get; set; }
        }

        [Fact]
        public void Should_Throw_If_Command_Option_Value_Is_Optional_But_Type_Is_Not_A_Flag_Value()
        {
            // Given
            var app = new CommandApp();
            app.Configure(config =>
            {
                config.PropagateExceptions();
                config.AddCommand<GenericCommand<FlagSettingsWithOptionalOptionButNoFlagValue>>("foo");
            });

            // When
            var result = Record.Exception(() => app.Run(new[] { "foo", "--serve", "123" }));

            // Then
            result.ShouldBeOfType<CommandConfigurationException>().And(ex =>
            {
                ex.Message.ShouldBe("The option 'serve' has an optional value but does not implement IFlagValue.");
            });
        }

        [Fact]
        public void Should_Set_Flag_And_Value_If_Both_Were_Provided()
        {
            // Given
            var app = new CommandAppTester();
            app.Configure(config =>
            {
                config.PropagateExceptions();
                config.AddCommand<GenericCommand<FlagSettings>>("foo");
            });

            // When
            var result = app.Run(new[] { "foo", "--serve", "123", });

            // Then
            result.ExitCode.ShouldBe(0);
            result.Settings.ShouldBeOfType<FlagSettings>().And(flag =>
            {
                flag.Serve.IsSet.ShouldBeTrue();
                flag.Serve.Value.ShouldBe(123);
            });
        }

        [Fact]
        public void Should_Only_Set_Flag_If_No_Value_Was_Provided()
        {
            // Given
            var app = new CommandAppTester();
            app.Configure(config =>
            {
                config.PropagateExceptions();
                config.AddCommand<GenericCommand<FlagSettings>>("foo");
            });

            // When
            var result = app.Run(new[] { "foo", "--serve" });

            // Then
            result.ExitCode.ShouldBe(0);
            result.Settings.ShouldBeOfType<FlagSettings>().And(flag =>
            {
                flag.Serve.IsSet.ShouldBeTrue();
                flag.Serve.Value.ShouldBe(0);
            });
        }

        [Fact]
        public void Should_Set_Value_To_Default_Value_If_None_Was_Explicitly_Set()
        {
            // Given
            var app = new CommandAppTester();
            app.Configure(config =>
            {
                config.PropagateExceptions();
                config.AddCommand<GenericCommand<FlagSettingsWithDefaultValue>>("foo");
            });

            // When
            var result = app.Run(new[] { "foo", "--serve" });

            // Then
            result.ExitCode.ShouldBe(0);
            result.Settings.ShouldBeOfType<FlagSettingsWithDefaultValue>().And(flag =>
            {
                flag.Serve.IsSet.ShouldBeTrue();
                flag.Serve.Value.ShouldBe(987);
            });
        }

        [Fact]
        public void Should_Create_Unset_Instance_If_Flag_Was_Not_Set()
        {
            // Given
            var app = new CommandAppTester();
            app.Configure(config =>
            {
                config.PropagateExceptions();
                config.AddCommand<GenericCommand<FlagSettings>>("foo");
            });

            // When
            var result = app.Run(new[] { "foo" });

            // Then
            result.ExitCode.ShouldBe(0);
            result.Settings.ShouldBeOfType<FlagSettings>().And(flag =>
            {
                flag.Serve.IsSet.ShouldBeFalse();
                flag.Serve.Value.ShouldBe(0);
            });
        }

        [Fact]
        public void Should_Create_Unset_Instance_With_Null_For_Nullable_Value_Type_If_Flag_Was_Not_Set()
        {
            // Given
            var app = new CommandAppTester();
            app.Configure(config =>
            {
                config.PropagateExceptions();
                config.AddCommand<GenericCommand<FlagSettingsWithNullableValueType>>("foo");
            });

            // When
            var result = app.Run(new[] { "foo" });

            // Then
            result.ExitCode.ShouldBe(0);
            result.Settings.ShouldBeOfType<FlagSettingsWithNullableValueType>().And(flag =>
            {
                flag.Serve.IsSet.ShouldBeFalse();
                flag.Serve.Value.ShouldBeNull();
            });
        }

        [Theory]
        [InlineData("Foo", true, "Set=True, Value=Foo")]
        [InlineData("Bar", false, "Set=False, Value=Bar")]
        public void Should_Return_Correct_String_Representation_From_ToString(
            string value,
            bool isSet,
            string expected)
        {
            // Given
            var flag = new FlagValue<string>
            {
                Value = value,
                IsSet = isSet,
            };

            // When
            var result = flag.ToString();

            // Then
            result.ShouldBe(expected);
        }

        [Theory]
        [InlineData(true, "Set=True")]
        [InlineData(false, "Set=False")]
        public void Should_Return_Correct_String_Representation_From_ToString_If_Value_Is_Not_Set(
            bool isSet,
            string expected)
        {
            // Given
            var flag = new FlagValue<string>
            {
                IsSet = isSet,
            };

            // When
            var result = flag.ToString();

            // Then
            result.ShouldBe(expected);
        }
    }
}