namespace BuildFlow.Architecture.Tests;

using Xunit;

/// <summary>
/// 工作流持久化任务和 Host 调度边界的源码架构测试。
/// </summary>
public class WorkflowJobArchitectureTests
{
    [Fact]
    public void ProcessEngineShouldNotUseProcessLocalTimerTasks()
    {
        var source = ReadSource("src/modules/workflow/Application/Engine/ProcessEngine.cs");

        Assert.DoesNotContain("Task.Run", source);
        Assert.DoesNotContain("timer:{", source);
    }

    [Fact]
    public void WorkflowTimerSchedulerShouldUseMediatorWithoutWorkflowInfrastructure()
    {
        var source = ReadSource(
            "src/BuildFlow.Host/Services/BackgroundServices/WorkflowTimerSchedulerService.cs");

        Assert.Contains("IMediator", source);
        Assert.Contains("mediator.Send", source);
        Assert.Contains("ProcessDueWorkflowTimersCommand", source);
        Assert.DoesNotContain("WorkflowDbContext", source);
        Assert.DoesNotContain("ProcessEngine", source);
    }

    [Fact]
    public void ImportJobProcessorServiceShouldUseMediatorWithoutWorkflowInfrastructure()
    {
        var source = ReadSource(
            "src/BuildFlow.Host/Services/BackgroundServices/ImportJobProcessorService.cs");

        Assert.Contains("IMediator", source);
        Assert.Contains("mediator.Send", source);
        Assert.Contains("ProcessAvailableImportJobsCommand", source);
        Assert.DoesNotContain("WorkflowDbContext", source);
        Assert.DoesNotContain("IImportJobProcessor", source);
        Assert.DoesNotContain("BuildFlowImportJobStatus", source);
        Assert.DoesNotContain(".Where(", source);
    }

    private static string ReadSource(string relativePath)
    {
        var path = Path.Combine(
            FindRepoRoot().FullName,
            relativePath.Replace('/', Path.DirectorySeparatorChar));
        Assert.True(System.IO.File.Exists(path), $"待验证源码不存在：{relativePath}");
        return System.IO.File.ReadAllText(path);
    }

    private static DirectoryInfo FindRepoRoot()
    {
        var current = new DirectoryInfo(AppContext.BaseDirectory);
        while (current is not null)
        {
            if (System.IO.File.Exists(Path.Combine(current.FullName, "BuildFlow.slnx"))) return current;
            current = current.Parent;
        }

        throw new InvalidOperationException("无法定位 BuildFlow.slnx，无法验证工作流任务架构边界。");
    }
}