using BuildFlow.Platform.Application.Menus.Helpers;
using FluentAssertions;
using Xunit;

namespace BuildFlow.Platform.Tests.Menus;

/// <summary>
/// 菜单路由 name 派生器测试。
/// 路由 name 不再由用户填写，创建菜单缺省时由后端根据 Code 自动派生。
/// </summary>
public class MenuRouteNameResolverTests
{
    [Theory]
    [InlineData("system.user", "SystemUser")]
    [InlineData("system", "System")]
    [InlineData("buildflow.form.expense.list", "BuildflowFormExpenseList")]
    [InlineData("build-flow", "BuildFlow")]
    [InlineData("expense_request", "ExpenseRequest")]
    [InlineData("expenseRequest", "Expenserequest")]
    public void DeriveFromCode_ShouldConvertToPascalCase(string code, string expected)
    {
        MenuRouteNameResolver.DeriveFromCode(code).Should().Be(expected);
    }

    [Theory]
    [InlineData(null)]
    [InlineData("")]
    [InlineData("   ")]
    [InlineData("...___")]
    public void DeriveFromCode_ShouldReturnFallbackWhenCodeHasNoAlphanumeric(string? code)
    {
        MenuRouteNameResolver.DeriveFromCode(code).Should().Be("Menu");
    }

    [Fact]
    public void DeriveFromCode_ShouldTruncateWhenCodeTooLong()
    {
        // 极长 Code：派生结果不应超过列长度保护阈值（90 字符）。
        var longCode = new string('a', 200);
        var result = MenuRouteNameResolver.DeriveFromCode(longCode);
        result.Should().NotBeEmpty();
        result.Length.Should().BeLessThanOrEqualTo(90);
    }

    [Fact]
    public void DeriveFromCode_ShouldHandleMixedCasingAndDigits()
    {
        MenuRouteNameResolver.DeriveFromCode("app.v2.userProfile")
            .Should().Be("AppV2Userprofile");
    }
}