using Xunit;

namespace Admin.NET.Plugin.AiDOP.Tests.ApprovalFlow;

/// <summary>
/// S8-EXCEPTION-FLOW-TENANT-CONTEXT-1 源码契约测试。
///
/// <para>背景：<c>FlowEngineService</c> 全程依赖 <c>SqlSugarRepository&lt;T&gt;</c>，
/// 裸 xUnit 进程无法实例化（无参构造触发 Furion.App 静态构造，在无宿主进程中抛
/// <c>TypeInitializationException</c>），因此本仓对这一层历来采用源码契约测试
/// （grep 断言代码形状），而非行为级 DB 集成测试——本文件延续该既有惯例。</para>
///
/// <para>覆盖范围：验证 §14 六个场景要求的代码形状是否落地，而非跑真实数据库。
/// 真正的行为级验证在运行态验收（Scheduler 真跑 GWR-S6-WO-DELAY）里完成。</para>
/// </summary>
public class S8ExceptionFlowTenantContextContractTests
{
    private static string FlowEngine() => File.ReadAllText(FindFile(
        "server", "Plugins", "Admin.NET.Plugin.ApprovalFlow", "Service", "FlowEngine", "FlowEngineService.cs"));

    private static string S8ManualReportService() => File.ReadAllText(FindFile(
        "server", "Plugins", "Admin.NET.Plugin.AiDOP", "Service", "S8", "S8ManualReportService.cs"));

    private static string S8TaskFlowService() => File.ReadAllText(FindFile(
        "server", "Plugins", "Admin.NET.Plugin.AiDOP", "Service", "S8", "S8TaskFlowService.cs"));

    private static string FindFile(params string[] parts)
    {
        var dir = new DirectoryInfo(AppContext.BaseDirectory);
        while (dir != null)
        {
            var candidate = Path.Combine(new[] { dir.FullName }.Concat(parts).ToArray());
            if (File.Exists(candidate)) return candidate;
            dir = dir.Parent;
        }
        throw new FileNotFoundException(string.Join("/", parts));
    }

    // ── Case 1 / Case 16：HTTP 人工路径必须原样保留，不接受客户端可提交的 TenantId ──

    [Fact]
    public void PublicStartFlow_StillUsesUserManagerTenantId_NoRegressionForHttpCallers()
    {
        Assert.Contains(
            "public Task<long> StartFlow(StartFlowInput input) => StartFlowCore(input, _userManager.TenantId);",
            FlowEngine());
    }

    [Fact]
    public void StartFlowInput_Dto_HasNoClientSettableTenantField()
    {
        var dto = File.ReadAllText(FindFile(
            "server", "Plugins", "Admin.NET.Plugin.ApprovalFlow", "Service", "FlowEngine", "Dto", "FlowEngineDtos.cs"));
        var startInputBlock = dto[dto.IndexOf("public class StartFlowInput")..];
        startInputBlock = startInputBlock[..startInputBlock.IndexOf("\n}\n")];
        Assert.DoesNotContain("TenantId", startInputBlock);
    }

    // ── Case 2：受信任重载存在，供后台/系统调用方使用 ──

    [Fact]
    public void TrustedStartFlowOverload_Exists()
    {
        Assert.Contains(
            "public Task<long> StartFlow(StartFlowInput input, long trustedTenantId) => StartFlowCore(input, trustedTenantId);",
            FlowEngine());
    }

    // ── Case 3：租户隔离——Flow Definition 选择必须硬过滤，不能只在 ORDER BY 里降权 ──

    [Fact]
    public void FlowSelection_HardFiltersTenant_NotJustOrdersByIt()
    {
        var src = FlowEngine();
        Assert.Contains("u.TenantId == effectiveTenantId || u.TenantId == null", src);
        // 回归防护：旧的「只在 ORDER BY 里区分租户、WHERE 不过滤」写法不得再出现。
        Assert.DoesNotContain("u.TenantId == tenantId ? 1 : 0", src);
    }

    // ── Case 4：Global Fallback——WHERE 允许 TenantId IS NULL，UAT 没有专属流程时能落到全局流程 ──

    [Fact]
    public void FlowSelection_AllowsGlobalFlowAsFallback()
    {
        Assert.Contains("u.TenantId == effectiveTenantId || u.TenantId == null", FlowEngine());
    }

    // ── Case 5：ResolveApprovers 的 Role Code / RoleId 两条分支都必须用 effectiveTenantId，禁止再读 _userManager.TenantId ──

    [Fact]
    public void ResolveApprovers_Signature_TakesExplicitEffectiveTenantId()
    {
        Assert.Contains(
            "private async Task<List<(long userId, string userName)>> ResolveApprovers(FlowProperties? props, long initiatorId, long effectiveTenantId)",
            FlowEngine());
    }

    [Fact]
    public void ResolveApprovers_Body_DoesNotReadUserManagerTenantId()
    {
        var src = FlowEngine();
        var start = src.IndexOf("private async Task<List<(long userId, string userName)>> ResolveApprovers(");
        Assert.True(start >= 0, "ResolveApprovers method not found");
        // 方法体到下一个同级 private 方法（EvaluateGateway）之前
        var end = src.IndexOf("private string EvaluateGateway(", start);
        Assert.True(end > start, "Could not bound ResolveApprovers method body");
        var body = src[start..end];

        Assert.DoesNotContain("_userManager.TenantId", body);
        Assert.Contains("r.TenantId == effectiveTenantId", body);
        Assert.Contains("u.TenantId == effectiveTenantId", body);
    }

    // ── Case 6：角色缺失必须显式失败，不得回落默认租户角色（既有 throw 逻辑未被改动） ──

    [Fact]
    public void CreateTasksForNode_StillThrowsOnZeroApprovers_NoSilentFallback()
    {
        Assert.Contains(
            "throw Oops.Oh($\"节点 [{node.Properties?.NodeName ?? nodeId}] 未配置审批人或审批人列表为空\");",
            FlowEngine());
    }

    // ── 既有推进路径（Approve/超时自动通过/手动升级）不得被本次改动波及行为 ──

    [Fact]
    public void ManualEscalate_StillPassesUserManagerTenantId_UnchangedBehavior()
    {
        var src = FlowEngine();
        var idx = src.IndexOf("public async Task Escalate(long taskId, string? comment)");
        Assert.True(idx >= 0);
        var nextMethod = src.IndexOf("public async Task Urge(long instanceId)", idx);
        var body = src[idx..nextMethod];
        Assert.Contains("_userManager.TenantId", body);
    }

    [Fact]
    public void AutoEscalateTask_StillPassesUserManagerTenantId_PreExistingGapUnchangedNotFixed()
    {
        var src = FlowEngine();
        var idx = src.IndexOf("private async Task AutoEscalateTask(");
        Assert.True(idx >= 0);
        var body = src[idx..(idx + 1500)];
        Assert.Contains("_userManager.TenantId", body);
    }

    // ── §13 调用点迁移：S8 三处后台/受信任路径必须改走受信任重载，不得依赖 _userManager.TenantId ──

    [Fact]
    public void S8ManualReportService_TryStartIntakeFlowAsync_UsesTrustedOverloadWithEntityTenantId()
    {
        var src = S8ManualReportService();
        var idx = src.IndexOf("private async Task TryStartIntakeFlowAsync(AdoS8Exception entity)");
        Assert.True(idx >= 0);
        var body = src[idx..(idx + 1200)];
        Assert.Contains("}, entity.TenantId);", body);
    }

    [Fact]
    public void S8TaskFlowService_UpgradeAsync_UsesTrustedOverloadWithExplicitTenantId()
    {
        var src = S8TaskFlowService();
        var idx = src.IndexOf("public async Task<AdoS8Exception> UpgradeAsync(long id, long tenantId, long factoryId, string? remark)");
        Assert.True(idx >= 0);
        var body = src[idx..(idx + 1200)];
        Assert.Contains("}, tenantId);", body);
    }

    // ── §13 HTTP 分类：其余 6 个调用点保持不变，未被误改为受信任重载 ──

    [Theory]
    [InlineData("FinishedWarehouse", "FqcTaskEntryService.cs")]
    [InlineData("MaterialWarehouse", "IqcInspBillFlowService.cs")]
    [InlineData("Manufacturing", "IpqcInspectionFlowService.cs")]
    [InlineData("Manufacturing", "S6ProcessInspectionReviewService.cs")]
    [InlineData("FinishedWarehouse", "FqcInspBillFlowService.cs")]
    public void HttpTriggeredCallSites_StillUsePublicOverload_NoRegression(string subDir, string file)
    {
        var src = File.ReadAllText(FindFile(
            "server", "Plugins", "Admin.NET.Plugin.AiDOP", subDir, file));
        Assert.Contains("_flowEngine.StartFlow(new StartFlowInput", src);
        // 不应出现受信任重载的两参数调用形态在这些 HTTP 触发的文件里
        Assert.DoesNotContain("}, tenantId);", src);
    }
}