using Xunit;

namespace Admin.NET.Plugin.AiDOP.Tests.S6.Manufacturing;

/// <summary>
/// 前端源码文本契约的公共视图：**去注释**后再断言。
/// 缘由：这些页面的注释里会成段引用节点码（N1_SUBMIT）、字段名（flowStatus / canSubmitReview）
/// 来解释"为什么不这么做"，裸文本 DoesNotContain 会把说明文字当成违规实现命中。
/// </summary>
internal static class VueSource
{
    /// <summary>剥掉 /* */ 块注释、&lt;!-- --&gt; HTML 注释、以及整行 // 与 * 续行注释。</summary>
    public static string CodeOnly(string src)
    {
        var s = System.Text.RegularExpressions.Regex.Replace(src, @"/\*.*?\*/", "", System.Text.RegularExpressions.RegexOptions.Singleline);
        s = System.Text.RegularExpressions.Regex.Replace(s, @"<!--.*?-->", "", System.Text.RegularExpressions.RegexOptions.Singleline);
        var kept = s.Split('\n').Where(l =>
        {
            var t = l.TrimStart();
            return !t.StartsWith("//", StringComparison.Ordinal) && !t.StartsWith("* ", StringComparison.Ordinal) && t != "*";
        });
        return string.Join("\n", kept);
    }
}

/// <summary>
/// S6-IPQC-EDIT-1 源码契约测试：IPQC 检查单详情页「编辑权限」归后端 Authority。
///
/// 缺口：`ReturnToPrev` 后实例仍是 Running（只回退 CurrentNodeId），而详情页把编辑权限写成
/// 本地表达式 `flowStatus !== 'NotStarted' → 只读`，于是主管退回回到 N1 后录入区仍锁死 ——
/// 后端已允许重新提交（canSubmitReview=true），前端却不允许改数据，形成"能提交但改不动"。
///
/// 修法：后端 `S6ReviewStateOutput.CanEdit`（复用与 canSubmitReview 同一份 N1 待办归属判定，
/// 但不叠加 completed），前端纯消费、状态缺失时 fail-closed。
///
/// 关键不变量：
///   1. canEdit ≠ canSubmitReview（后者多一个 completed 条件）——不得互相顶替；
///   2. 授权不能只看节点，必须节点 + Pending + AssigneeId==当前用户；
///   3. 首次录入（NotStarted）不得被本次修复关掉；
///   4. 前端不得保留任何本地流程推断。
///
/// 沿用本仓既有做法——源码契约断言而非行为级集成测试（service 依赖 ISqlSugarClient /
/// FlowEngineService，裸 xUnit 进程无法实例化）。真实状态矩阵由本批 Runtime R1–R12 覆盖。
/// </summary>
public class S6ProcessInspectionEditAuthorityContractTests
{
    private static string Svc() => File.ReadAllText(FindFile(
        "server", "Plugins", "Admin.NET.Plugin.AiDOP", "Manufacturing", "S6ProcessInspectionReviewService.cs"));

    private static string Dto() => File.ReadAllText(FindFile(
        "server", "Plugins", "Admin.NET.Plugin.AiDOP", "Manufacturing", "Dto", "S6ProcessInspectionReviewDto.cs"));

    private static string DetailPage() => File.ReadAllText(FindFile(
        "Web", "src", "views", "aidop", "s6", "process-quality", "ipqcBillDetail.vue"));

    private static string ItemPanel() => File.ReadAllText(FindFile(
        "Web", "src", "views", "aidop", "s6", "process-quality", "components", "IpqcBillItemPanel.vue"));

    private static string ApiTypes() => File.ReadAllText(FindFile(
        "Web", "src", "views", "aidop", "s6", "api", "productionInstruction.ts"));

    // ── 后端必须成为唯一 authority ──

    /// <summary>capability 必须落在只读状态 DTO 上（与其余 4 个按钮门控同一处）。</summary>
    [Fact]
    public void Dto_ExposesCanEditCapability()
    {
        Assert.Contains("public bool CanEdit { get; set; }", Dto());
    }

    /// <summary>编辑权限必须在 BuildStateAsync 里算，不得散落到 Controller / 前端。</summary>
    [Fact]
    public void State_ComputesCanEditInBuildState()
    {
        var body = BuildStateBody();
        Assert.Contains("output.CanEdit", body);
    }

    // ── §30 状态矩阵 ──

    /// <summary>NotStarted：首次录入必须可编辑，且**不受 completed 约束**（否则录完即锁死）。</summary>
    [Fact]
    public void Matrix_NotStarted_IsEditable()
    {
        var branch = Slice(BuildStateBody(), "output.FlowStatus = \"NotStarted\";", "return output;");
        Assert.Contains("output.CanEdit = true;", branch);
        Assert.DoesNotContain("output.CanEdit = completed", branch);
    }

    /// <summary>退回到 N1 且本人持有该待办：可编辑，且同样不叠加 completed。</summary>
    [Fact]
    public void Matrix_ReturnedToN1_IsEditable()
    {
        var branch = ReturnedBranch();
        Assert.Contains("output.CanEdit = true;", branch);
        Assert.DoesNotContain("output.CanEdit = completed", branch);
    }

    /// <summary>终态（Approved / Rejected / Cancelled / Terminated）：显式不可编辑。</summary>
    [Fact]
    public void Matrix_Terminal_IsReadOnly()
    {
        var branch = Slice(BuildStateBody(),
            "if (inst.Status != FlowInstanceStatusEnum.Running)", "output.CurrentNodeCode = inst.CurrentNodeId;");
        Assert.Contains("output.CanEdit = false;", branch);
    }

    /// <summary>
    /// N2 主管审核 / N3 质量处置 / 本人无待办三条路径必须靠 bool 默认 false 兜底 ——
    /// 即这些分支里不得出现任何把 CanEdit 打开的赋值。
    /// </summary>
    [Theory]
    [InlineData("if (myTask.NodeId == S6ProcessInspectionFlowConst.NodeSupervisor)", "else if (myTask.NodeId == S6ProcessInspectionFlowConst.NodeDisposition)")]
    [InlineData("else if (myTask.NodeId == S6ProcessInspectionFlowConst.NodeDisposition)", "else if (myTask.NodeId == S6ProcessInspectionFlowConst.NodeSubmit)")]
    [InlineData("output.Message = \"流程进行中（当前用户无待办）\";", "return output;")]
    public void Matrix_NonEditableBranches_NeverOpenCanEdit(string from, string to)
    {
        var branch = Slice(BuildStateBody(), from, to);
        Assert.DoesNotContain("output.CanEdit = true", branch);
    }

    /// <summary>CanEdit 在整个 service 里只有三处赋值（NotStarted / 终态 / 退回 N1），防止后续被到处打开。</summary>
    [Fact]
    public void CanEdit_HasExactlyThreeAssignments()
    {
        Assert.Equal(3, CountOf(Svc(), "output.CanEdit"));
    }

    // ── §8 授权不能只看节点 ──

    /// <summary>退回态的可编辑判定必须建立在「本人持有的 Pending 待办」之上，不是只看 CurrentNodeId。</summary>
    [Fact]
    public void EditAuthority_RequiresOwnedPendingTaskNotJustNode()
    {
        var body = BuildStateBody();
        // 分支入口本身就由 myTask 决定
        Assert.Contains("var myTask = await GetMyPendingTaskAsync(inst.Id);", body);
        Assert.Contains("if (myTask != null)", body);
        Assert.Contains("else if (myTask.NodeId == S6ProcessInspectionFlowConst.NodeSubmit)", body);
        // 不得出现「只按实例当前节点」开放编辑的写法
        Assert.DoesNotContain("inst.CurrentNodeId == S6ProcessInspectionFlowConst.NodeSubmit)\n            output.CanEdit", body);
    }

    /// <summary>待办归属必须按当前用户 + Pending 过滤（与重提复用同一 helper）。</summary>
    [Fact]
    public void PendingTaskHelper_ScopedToCurrentUserAndPending()
    {
        var helper = Slice(Svc(), "private async Task<ApprovalFlowTask?> GetMyPendingTaskAsync", "private async Task<(ApprovalFlowInstance");
        Assert.Contains("_userManager.UserId", helper);
        Assert.Contains("x.AssigneeId == userId", helper);
        Assert.Contains("FlowTaskStatusEnum.Pending", helper);
    }

    /// <summary>租户收口：state 入口先走 LoadBillAsync，且 BuildStateAsync 的单据查询带 tenant_id。</summary>
    [Fact]
    public void State_IsTenantScoped()
    {
        var s = Svc();
        Assert.Contains("await LoadBillAsync(billId);", s);
        Assert.Contains("var tid = ResolveTenantOrThrow();", BuildStateBody());
        Assert.Contains("WHERE b.id=@id AND b.tenant_id=@tid", BuildStateBody());
    }

    // ── §10 两个 capability 语义不等价 ──

    /// <summary>
    /// canEdit 与 canSubmitReview 不得等价：退回分支里 canSubmitReview 仍带 completed 门槛，
    /// canEdit 不带 —— 这正是"退回后开始改结果（ResultStatus 回到 IN_PROGRESS）仍要能改"的依据。
    /// </summary>
    [Fact]
    public void CanEdit_IsNotAliasOfCanSubmitReview()
    {
        var branch = ReturnedBranch();
        Assert.Contains("output.CanEdit = true;", branch);
        Assert.Contains("output.CanSubmitReview = completed;", branch);
    }

    /// <summary>后端不得把 canEdit 直接写成 canSubmitReview 的别名。</summary>
    [Theory]
    [InlineData("output.CanEdit = output.CanSubmitReview")]
    [InlineData("output.CanEdit = completed")]
    public void CanEdit_NotDerivedFromSubmitCapability(string forbidden)
    {
        Assert.DoesNotContain(forbidden, Svc());
    }

    // ── §31 Reject→N1 契约冻结（上游语义不得被改坏）──

    /// <summary>退回必须保持实例 Running + 回到 N1，否则 canEdit 的退回分支永远进不到。</summary>
    [Fact]
    public void SupervisorReturn_KeepsInstanceRunningAtN1()
    {
        var engine = File.ReadAllText(FindFile(
            "server", "Plugins", "Admin.NET.Plugin.ApprovalFlow", "Service", "FlowEngine", "FlowEngineService.cs"));
        var body = Slice(engine, "public async Task ReturnToPrev(long taskId, string? comment)", "/// <summary>\n    /// 加签");
        Assert.Contains("instance.CurrentNodeId = prevNodeId;", body);
        Assert.Contains("CreateTasksForNode(instance, flowData, prevNodeId)", body);
        Assert.DoesNotContain("instance.Status = FlowInstanceStatusEnum.Rejected", body);
    }

    /// <summary>退回后展示状态仍须是业务中文（后端拥有语义，前端不拼）。</summary>
    [Fact]
    public void ReturnedBranch_KeepsBackendOwnedDisplayStatus()
    {
        Assert.Contains("output.DisplayStatus = \"已退回待重新提交\";", ReturnedBranch());
    }

    // ── 前端：纯消费 + fail-closed ──

    /// <summary>详情页必须直接消费后端字段。</summary>
    [Fact]
    public void Frontend_ConsumesBackendCanEdit()
    {
        Assert.Contains("review.value?.canEdit === true", DetailPage());
    }

    /// <summary>状态缺失（加载中 / 接口失败）时必须 fail-closed —— 旧实现在 review 为空时是放开的。</summary>
    [Fact]
    public void Frontend_FailsClosedWhenStateMissing()
    {
        var s = DetailPage();
        Assert.DoesNotContain("!(fs && fs !== 'NotStarted')", s);
        Assert.DoesNotContain("review.value?.canEdit !== false", s);
    }

    /// <summary>
    /// 前端不得保留任何本地流程推断作为编辑权限来源。
    /// 断言只作用于 canEdit 那一行本身 —— 页面别处按 capability 显示按钮（hasAnyAction 聚合
    /// canSubmitReview 等）是正当用法，不能一并禁掉。
    /// </summary>
    [Theory]
    [InlineData("flowStatus")]
    [InlineData("currentNodeCode")]
    [InlineData("canSubmitReview")]
    [InlineData("N1_SUBMIT")]
    public void Frontend_CanEditExpressionHasNoLocalFlowInference(string forbidden)
    {
        var line = VueSource.CodeOnly(DetailPage())
            .Split('\n').Single(l => l.Contains("const canEdit", StringComparison.Ordinal));
        Assert.DoesNotContain(forbidden, line);
    }

    /// <summary>整页不得残留旧的本地推断表达式。</summary>
    [Fact]
    public void Frontend_OldLocalExpressionIsGone()
    {
        Assert.DoesNotContain("!(fs && fs !== 'NotStarted')", VueSource.CodeOnly(DetailPage()));
    }

    /// <summary>TS 类型须同步补齐，否则 vue-tsc 下 canEdit 会是隐式 any/报错。</summary>
    [Fact]
    public void FrontendTypes_DeclareCanEdit()
    {
        Assert.Contains("canEdit?: boolean;", ApiTypes());
    }

    /// <summary>
    /// §12：录入区的输入框与保存/完成页脚必须由**同一个** canEdit 控制 ——
    /// 不允许出现"按钮 disabled 但 input 还能改"。
    /// </summary>
    [Fact]
    public void ItemPanel_SingleEditSwitchGovernsInputsAndFooter()
    {
        var s = VueSource.CodeOnly(ItemPanel());
        Assert.Contains(":disabled=\"!canEdit\"", s);
        Assert.Contains("v-if=\"canEdit\" class=\"panel-foot\"", s);
        // 组件内不得自己看流程（去注释后断言：注释里成段解释"不按 flowStatus 推断"，不算实现）
        Assert.DoesNotContain("flowStatus", s);
        Assert.DoesNotContain("currentNodeCode", s);
    }

    /// <summary>子组件 canEdit 默认必须是 false（fail-closed）。</summary>
    [Fact]
    public void ItemPanel_DefaultsToReadOnly()
    {
        Assert.Contains("canEdit: false", ItemPanel());
    }

    // ── 范围守卫：本轮不得动审批流框架 ──

    /// <summary>编辑权限不得改成前端可传入 —— state 是只读输出，不接受回传判定。</summary>
    [Theory]
    [InlineData("CanEdit { get; set; }", "S6ReviewStateOutput")]
    public void CanEdit_LivesOnlyOnReadOnlyStateOutput(string decl, string owner)
    {
        var dto = Dto();
        var cls = Slice(dto, $"public class {owner}", "public class S6DispositionView");
        Assert.Contains(decl, cls);
        // 入参 DTO 一律不得带 CanEdit
        foreach (var input in new[] { "S6SubmitReviewInput", "S6ReviewApproveInput", "S6ReviewReturnInput", "S6QeDispositionInput" })
        {
            var start = dto.IndexOf($"public class {input}", StringComparison.Ordinal);
            Assert.True(start >= 0, $"未找到入参类 {input}");
            var end = dto.IndexOf("public class ", start + input.Length + 14, StringComparison.Ordinal);
            var slice = end > start ? dto[start..end] : dto[start..];
            Assert.DoesNotContain("CanEdit", slice);
        }
    }

    private static string BuildStateBody() => Slice(Svc(),
        "private async Task<S6ReviewStateOutput> BuildStateAsync(long billId)",
        "// ── Phase 1E 展示辅助");

    private static string ReturnedBranch() => Slice(BuildStateBody(),
        "else if (myTask.NodeId == S6ProcessInspectionFlowConst.NodeSubmit)",
        "            else\n            {");

    private static int CountOf(string src, string needle)
    {
        int n = 0, i = 0;
        while ((i = src.IndexOf(needle, i, StringComparison.Ordinal)) >= 0) { n++; i += needle.Length; }
        return n;
    }

    private static string Slice(string src, string from, string to)
    {
        var a = src.IndexOf(from, StringComparison.Ordinal);
        Assert.True(a >= 0, $"未找到起点：{from}");
        var b = src.IndexOf(to, a + from.Length, StringComparison.Ordinal);
        return b > a ? src[a..b] : src[a..];
    }

    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));
    }
}