namespace Spectre.Console.Tests.Unit.Cli.Annotations;

public sealed partial class CommandOptionAttributeTests
{
    [Fact]
    public void Should_Parse_Short_Name_Correctly()
    {
        // Given, When
        var option = new CommandOptionAttribute("-o|--option <VALUE>");

        // Then
        option.ShortNames.ShouldContain("o");
    }

    [Fact]
    public void Should_Parse_Long_Name_Correctly()
    {
        // Given, When
        var option = new CommandOptionAttribute("-o|--option <VALUE>");

        // Then
        option.LongNames.ShouldContain("option");
    }

    [Theory]
    [InlineData("<VALUE>")]
    public void Should_Parse_Value_Correctly(string value)
    {
        // Given, When
        var option = new CommandOptionAttribute($"-o|--option {value}");

        // Then
        option.ValueName.ShouldBe("VALUE");
    }

    [Fact]
    public void Should_Parse_Only_Short_Name()
    {
        // Given, When
        var option = new CommandOptionAttribute("-o");

        // Then
        option.ShortNames.ShouldContain("o");
    }

    [Fact]
    public void Should_Parse_Only_Long_Name()
    {
        // Given, When
        var option = new CommandOptionAttribute("--option");

        // Then
        option.LongNames.ShouldContain("option");
    }

    [Theory]
    [InlineData("")]
    [InlineData("<VALUE>")]
    public void Should_Throw_If_Template_Is_Empty(string value)
    {
        // Given, When
        var option = Record.Exception(() => new CommandOptionAttribute(value));

        // Then
        option.ShouldBeOfType<CommandTemplateException>().And(e =>
            e.Message.ShouldBe("No long or short name for option has been specified."));
    }

    [Theory]
    [InlineData("--bar|-foo")]
    [InlineData("--bar|-f-b")]
    public void Should_Throw_If_Short_Name_Is_Invalid(string value)
    {
        // Given, When
        var option = Record.Exception(() => new CommandOptionAttribute(value));

        // Then
        option.ShouldBeOfType<CommandTemplateException>().And(e =>
            e.Message.ShouldBe("Short option names can not be longer than one character."));
    }

    [Theory]
    [InlineData("--o")]
    public void Should_Throw_If_Long_Name_Is_Invalid(string value)
    {
        // Given, When
        var option = Record.Exception(() => new CommandOptionAttribute(value));

        // Then
        option.ShouldBeOfType<CommandTemplateException>().And(e =>
            e.Message.ShouldBe("Long option names must consist of more than one character."));
    }

    [Theory]
    [InlineData("-")]
    [InlineData("--")]
    public void Should_Throw_If_Option_Have_No_Name(string template)
    {
        // Given, When
        var option = Record.Exception(() => new CommandOptionAttribute(template));

        // Then
        option.ShouldBeOfType<CommandTemplateException>().And(e =>
            e.Message.ShouldBe("Options without name are not allowed."));
    }

    [Theory]
    [InlineData("--foo|-foo[b", '[')]
    [InlineData("--foo|-f€b", '€')]
    [InlineData("--foo|-foo@b", '@')]
    public void Should_Throw_If_Option_Contains_Invalid_Name(string template, char invalid)
    {
        // Given, When
        var result = Record.Exception(() => new CommandOptionAttribute(template));

        // Then
        result.ShouldBeOfType<CommandTemplateException>().And(e =>
        {
            e.Message.ShouldBe($"Encountered invalid character '{invalid}' in option name.");
            e.Template.ShouldBe(template);
        });
    }

    [Theory]
    [InlineData("--foo <HELLO-WORLD>", "HELLO-WORLD")]
    [InlineData("--foo <HELLO_WORLD>", "HELLO_WORLD")]
    public void Should_Accept_Dash_And_Underscore_In_Value_Name(string template, string name)
    {
        // Given, When
        var result = new CommandOptionAttribute(template);

        // Then
        result.ValueName.ShouldBe(name);
    }

    [Theory]
    [InlineData("--foo|-1")]
    public void Should_Throw_If_First_Letter_Of_An_Option_Name_Is_A_Digit(string template)
    {
        // Given, When
        var result = Record.Exception(() => new CommandOptionAttribute(template));

        // Then
        result.ShouldBeOfType<CommandTemplateException>().And(e =>
        {
            e.Message.ShouldBe("Option names cannot start with a digit.");
            e.Template.ShouldBe(template);
        });
    }

    [Fact]
    public void Multiple_Short_Options_Are_Supported()
    {
        // Given, When
        var result = new CommandOptionAttribute("-f|-b");

        // Then
        result.ShortNames.Count.ShouldBe(2);
        result.ShortNames.ShouldContain("f");
        result.ShortNames.ShouldContain("b");
    }

    [Fact]
    public void Multiple_Long_Options_Are_Supported()
    {
        // Given, When
        var result = new CommandOptionAttribute("--foo|--bar");

        // Then
        result.LongNames.Count.ShouldBe(2);
        result.LongNames.ShouldContain("foo");
        result.LongNames.ShouldContain("bar");
    }

    [Theory]
    [InlineData("-f|--foo <BAR>")]
    [InlineData("--foo|-f <BAR>")]
    [InlineData("<BAR> --foo|-f")]
    [InlineData("<BAR> -f|--foo")]
    [InlineData("-f <BAR> --foo")]
    [InlineData("--foo <BAR> -f")]
    public void Template_Parts_Can_Appear_In_Any_Order(string template)
    {
        // Given, When
        var result = new CommandOptionAttribute(template);

        // Then
        result.LongNames.ShouldContain("foo");
        result.ShortNames.ShouldContain("f");
        result.ValueName.ShouldBe("BAR");
    }

    [Fact]
    public void Is_Not_Hidden_From_Help_By_Default()
    {
        // Given, When
        var result = new CommandOptionAttribute("--foo");

        // Then
        result.IsHidden.ShouldBeFalse();
    }

    [Fact]
    public void Can_Indicate_That_It_Must_Be_Hidden_From_Help_Text()
    {
        // Given, When
        var result = new CommandOptionAttribute("--foo") { IsHidden = true };

        // Then
        result.IsHidden.ShouldBeTrue();
    }
}