using System.Reflection;
using Admin.NET.Plugin.AiDOP.Const.S8;
using Admin.NET.Plugin.AiDOP.Entity.S8;
using Admin.NET.Plugin.AiDOP.Infrastructure.S8;
using Admin.NET.Plugin.AiDOP.Service.S8;
using Admin.NET.Plugin.AiDOP.Service.S8.Rules;
using Xunit;

namespace Admin.NET.Plugin.AiDOP.Tests.S8;

/// <summary>
/// S8-HANDLER-POOL-1：规则处理账号池与认领资格。
///
/// <para><b>三个正交维度</b>：动作权限（角色能做什么）· 规则责任（账号负责哪条规则）·
/// 状态机（单据现在能不能做）。最终允许 = 三者交集。把它们混在一处判断是本仓踩过的坑：
/// 某一维被"顺手"放宽后，另外两维看起来仍然正常，缺陷只在特定组合下出现。</para>
/// </summary>
public class S8RuleHandlerPoolTests
{
    private const BindingFlags Instance =
        BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic;

    private static readonly string PluginRoot =
        Path.GetFullPath(Path.Combine(AppContext.BaseDirectory, "../../../../Admin.NET.Plugin.AiDOP"));

    private static string CodeOnly(string relativePath)
    {
        var full = Path.Combine(PluginRoot, relativePath.Replace('/', Path.DirectorySeparatorChar));
        Assert.True(File.Exists(full), $"源码文件不存在，路径需同步更新：{full}");
        return string.Join('\n', File.ReadAllLines(full)
            .Where(l =>
            {
                var t = l.TrimStart();
                return !t.StartsWith("///", StringComparison.Ordinal)
                       && !t.StartsWith("//", StringComparison.Ordinal);
            }));
    }

    // ══════════════════════════════════════════════════════════════════════════
    // 存储形态
    // ══════════════════════════════════════════════════════════════════════════

    /// <summary>
    /// 身份是 (租户, 规则编码, 账号)。
    ///
    /// <para><b>必须是 rule_code 而不是 rule_id</b>：provisioning 的身份口径就是
    /// (TenantId, RuleCode)，而 watch_rule 的行会被重建 —— 1.0.496 的 clean reset
    /// 之后 id 全部变化。绑 id 会让人员池在那一刻集体失联，而且不报错：
    /// 规则照常跑，只是谁都不再"负责"它。</para>
    /// </summary>
    [Fact]
    public void Storage_IdentityIsTenantRuleCodeUser()
    {
        var t = typeof(AdoS8RuleHandlerUser);
        Assert.NotNull(t.GetProperty("TenantId"));
        Assert.NotNull(t.GetProperty("RuleCode"));
        Assert.NotNull(t.GetProperty("UserId"));
        Assert.Null(t.GetProperty("RuleId"));      // 绑 id 会在规则行重建时集体失联
        Assert.Null(t.GetProperty("FactoryId"));   // 工厂不是隔离维度
        Assert.Null(t.GetProperty("EmployeeId"));  // S8 的人只有系统账号
    }

    /// <summary>人员池不得回流进 params_json —— 那个字段有被整块抹成 NULL 的事故先例。</summary>
    [Fact]
    public void HandlerPool_IsNotStoredInParamsJson()
    {
        var code = CodeOnly("Service/S8/Rules/S8RuleRuntimeParameters.cs");
        Assert.DoesNotContain("HandlerUser", code);
        Assert.DoesNotContain("handlerUserIds", code);

        // params_json 的 B 类键仍然只有那三项
        Assert.Contains("KeyGraceMinutes", code);
        Assert.Contains("KeyDefaultOccurrenceDeptId", code);
        Assert.Contains("KeyDefaultResponsibleDeptId", code);
    }

    // ══════════════════════════════════════════════════════════════════════════
    // 成员合法性
    // ══════════════════════════════════════════════════════════════════════════

    /// <summary>
    /// 成员合法性复用 <see cref="IS8UserScopeValidator"/>，不另写一套判据。
    /// 池成员与认领人必须用同一把尺子，否则会出现「配得进池、认领时又被拒」——
    /// 这种状态管理员完全无法自查。
    /// </summary>
    [Fact]
    public void Membership_ReusesUserScopeValidator()
    {
        var code = CodeOnly("Service/S8/S8RuleHandlerPoolService.cs");
        Assert.Contains("_userScope.ValidateUsersAsync", code);
        Assert.Contains("_userScope.FindActiveUserAsync", code);

        // 不得绕过 validator 自己拼 SysUser 查询
        Assert.DoesNotContain("Queryable<SysUser>", code);
        Assert.DoesNotContain("StatusEnum.Enable", code);
        // 跨租户与不存在共用同一文案，不泄漏存在性
        Assert.Contains("所选账号不存在或已停用", code);
    }

    /// <summary>
    /// 失效成员必须<b>返回并标记</b>，不能静默过滤。
    /// 账号被停用之后池子无声地少一个人，管理员既看不见也不知道要补。
    /// </summary>
    [Fact]
    public void InvalidMembers_AreSurfacedNotSilentlyDropped()
    {
        var code = CodeOnly("Service/S8/S8RuleHandlerPoolService.cs");
        Assert.Contains("Valid = false", code);
        Assert.Contains("账号已停用或不在本租户", code);
    }

    /// <summary>责任池链路上不得出现工厂或员工。</summary>
    [Theory]
    [InlineData("Service/S8/S8RuleHandlerPoolService.cs")]
    [InlineData("Infrastructure/S8/S8ClaimEligibility.cs")]
    public void HandlerPoolChain_HasNoFactoryOrEmployee(string relativePath)
    {
        var code = CodeOnly(relativePath);
        Assert.DoesNotContain("FactoryId", code);
        Assert.DoesNotContain("FactoryRefId", code);
        Assert.DoesNotContain("EmployeeMaster", code);
    }

    // ══════════════════════════════════════════════════════════════════════════
    // 认领资格：三维正交
    // ══════════════════════════════════════════════════════════════════════════

    /// <summary>
    /// 认领资格 = 动作权限 ∩ 规则责任，且两个拒绝原因<b>可分辨</b>。
    ///
    /// <para>「没权限」与「不负责这条规则」是两种完全不同的处境，给用户同一句话
    /// 会让他去找错人 —— 前者要找管理员配角色，后者要找管理员加责任池。</para>
    /// </summary>
    [Fact]
    public void ClaimEligibility_CombinesPermissionAndResponsibility()
    {
        var code = CodeOnly("Infrastructure/S8/S8ClaimEligibility.cs");

        Assert.Contains("_authorizer.AuthorizeAsync(tenantId, userId, S8ExceptionActionCode.Claim)", code);
        Assert.Contains("_handlerPool.IsMemberAsync", code);
        Assert.Contains(S8ClaimDenyReason.NoActionPermission, code);
        Assert.Contains(S8ClaimDenyReason.NotInHandlerPool, code);
        Assert.NotEqual(S8ClaimDenyReason.NoActionPermission, S8ClaimDenyReason.NotInHandlerPool);
    }

    /// <summary>
    /// 人工提报无来源规则，<b>不受责任池约束</b>。
    /// 若一刀切要求入池，人工提报的异常将永远无人可认领。
    /// </summary>
    [Fact]
    public void ManualReport_IsNotConstrainedByHandlerPool()
    {
        var code = CodeOnly("Infrastructure/S8/S8ClaimEligibility.cs");
        Assert.Contains("string.IsNullOrWhiteSpace(ruleCode)", code);
        Assert.Contains("return S8ClaimEligibilityResult.Pass();", code);
    }

    /// <summary>
    /// 状态机与并发那一维<b>不在资格判定里重复实现</b> ——
    /// 仍由 <c>S8TaskFlowService</c> 的原子 UPDATE 负责，First Claim Wins 不受本批影响。
    /// </summary>
    [Fact]
    public void ClaimEligibility_DoesNotDuplicateStateOrConcurrency()
    {
        var elig = CodeOnly("Infrastructure/S8/S8ClaimEligibility.cs");
        Assert.DoesNotContain("S8StatusRules", elig);
        Assert.DoesNotContain("AssigneeUserId", elig);

        var flow = CodeOnly("Service/S8/S8TaskFlowService.cs");
        Assert.Contains("_claimEligibility.CheckAsync(tenantId, currentUserId, e)", flow);
        // 原子谓词与竞争败者文案仍在
        Assert.Contains("x.AssigneeUserId == null", flow);
        Assert.Contains("该异常已被其他人员认领", flow);
    }

    /// <summary>
    /// 转派目标同样受责任池约束 —— 不留「转给池外账号」的后门。
    ///
    /// <para>留后门等于绕过责任池本身：池子写着 A、B 负责，实际单据却落到 C 手里，
    /// 而池配置看起来仍然正确。</para>
    /// </summary>
    [Fact]
    public void Transfer_TargetMustBeInHandlerPool()
    {
        var flow = CodeOnly("Service/S8/S8TaskFlowService.cs");
        Assert.Contains("_handlerPool.IsMemberAsync(tenantId, e.SourceRuleCode!, target.UserId)", flow);
        Assert.Contains("不是该规则的处理人员，无法转派", flow);
        // 人工提报同样豁免（与认领同口径）
        Assert.Contains("!string.IsNullOrWhiteSpace(e.SourceRuleCode)", flow);
    }

    /// <summary>认领资格必须只有一份实现。</summary>
    [Fact]
    public void ClaimEligibility_HasSingleImplementation()
    {
        var impls = typeof(IS8ClaimEligibility).Assembly.GetTypes()
            .Where(t => t is { IsAbstract: false, IsInterface: false }
                        && typeof(IS8ClaimEligibility).IsAssignableFrom(t))
            .ToList();
        Assert.Single(impls);
        Assert.Equal(typeof(S8ClaimEligibility), impls[0]);
    }

    // ══════════════════════════════════════════════════════════════════════════
    // 启用门禁
    // ══════════════════════════════════════════════════════════════════════════

    /// <summary>
    /// 启用要求至少一名<b>当前有效</b>的处理账号。
    ///
    /// <para>判据不能是"表里有没有行"：账号被停用之后那行还在，但人已经不能认领了。
    /// 只数行数会让一条实际上没人能处理的规则通过启用检查 —— 那正是本门禁存在的意义。</para>
    /// </summary>
    [Fact]
    public void Enable_RequiresAtLeastOneValidHandler()
    {
        var code = CodeOnly("Service/S8/Rules/S8RuleReadinessGate.cs");
        Assert.Contains(S8RuleReadinessReasonCode.HandlerPoolEmpty, code);

        // S8-RESPONSIBILITY-POOL-1：三类责任池走统一 reader，处理池由 responsibilityType 指定。
        Assert.Contains("_pools.GetMembersAsync(tenantId, ruleCode, responsibilityType)", code);
        Assert.Contains("S8ResponsibilityType.Handler", code);

        // 有效性判据：不是 Count > 0，而是"存在一个 Valid 的"
        Assert.Contains("members.Any(m => m.Valid)", code);
        Assert.DoesNotContain("members.Count > 0)", code);

        // 两种失败要给不同提示：没配过 vs 配过但都失效
        Assert.Contains("请先配置至少一名处理账号", code);
        Assert.Contains("均已停用或不在当前租户", code);
    }

    /// <summary>
    /// Preview 不受责任池约束（只读试算，与人员池正确性无关）。
    ///
    /// <para>预演在独立的 <c>S8WatchRulePreviewService</c> 里，它整个不碰就绪门禁 ——
    /// 管理员本来就该「先预演看命中，再配人配部门，再启用」。若预演也要求先配人，
    /// 管理员将无法在配置前判断这条规则到底有没有用。</para>
    /// </summary>
    [Fact]
    public void Preview_IsNotGatedByHandlerPool()
    {
        var preview = CodeOnly("Service/S8/S8WatchRulePreviewService.cs");
        Assert.Contains("PreviewAsync", preview);
        Assert.DoesNotContain("EnsureReadyAsync", preview);
        Assert.DoesNotContain("_handlerPool", preview);
        Assert.DoesNotContain("IS8RuleHandlerPoolReader", preview);

        // 启用路径必须仍有门禁 —— 否则这条断言会在"门禁被整个删掉"时假通过。
        var ruleSvc = CodeOnly("Service/S8/S8WatchRuleService.cs");
        Assert.Contains("EnsureReadyAsync", ruleSvc);
    }

    // ══════════════════════════════════════════════════════════════════════════
    // 可见性
    // ══════════════════════════════════════════════════════════════════════════

    /// <summary>
    /// View 与 View All 分离：没有 <c>EXCEPTION_VIEW_ALL</c> 的账号只看得到
    /// 自己负责的规则产出的异常、人工提报、以及与自己直接相关的单子。
    ///
    /// <para>最后一支是必要的：单据可能在他认领之后被移出责任池，
    /// 少了它他会看不见自己手上正在处理的单子。</para>
    /// </summary>
    [Fact]
    public void Visibility_SeparatesViewFromViewAll()
    {
        var code = CodeOnly("Service/S8/S8ExceptionService.cs");
        Assert.Contains("S8ExceptionActionCode.ViewAll", code);
        Assert.Contains("myRuleCodes.Contains(e.SourceRuleCode)", code);
        Assert.Contains("SqlFunc.IsNullOrEmpty(e.SourceRuleCode)", code);
        Assert.Contains("e.AssigneeUserId == myUserId", code);
        Assert.Contains("e.VerifierUserId == myUserId", code);
        Assert.Contains("e.ReporterUserId == myUserId", code);
    }

    /// <summary>
    /// 无登录上下文（看板聚合 / 后台作业）与超管不做可见性收敛。
    /// 给它们加限制只会让统计数字凭空少掉，而且没人会想到去查这里。
    /// </summary>
    [Fact]
    public void Visibility_SkipsSuperAdminAndBackgroundCallers()
    {
        var code = CodeOnly("Service/S8/S8ExceptionService.cs");
        Assert.Contains("if (_userManager.SuperAdmin) return null;", code);
        Assert.Contains("if (userId <= 0 || tenantId <= 0) return null;", code);
    }

    /// <summary>
    /// <c>EXCEPTION_VIEW_ALL</c> 在 P1-B 建立时没有消费方，本批必须闭环 ——
    /// 否则它就是一个配了也不起作用的开关。
    /// </summary>
    [Fact]
    public void ViewAll_HasARealConsumer()
    {
        Assert.Contains(S8ExceptionActionCatalog.All, d => d.Code == S8ExceptionActionCode.ViewAll);
        var code = CodeOnly("Service/S8/S8ExceptionService.cs");
        Assert.Contains("allowed.Contains(S8ExceptionActionCode.ViewAll)", code);
    }

    // ══════════════════════════════════════════════════════════════════════════
    // 迁移
    // ══════════════════════════════════════════════════════════════════════════

    /// <summary>迁移建唯一索引 + 反查索引，并断言不存在跨租户池成员。</summary>
    [Fact]
    public void Migration_GuardsUniquenessAndTenantBoundary()
    {
        var sql = File.ReadAllText(Path.GetFullPath(Path.Combine(
            PluginRoot, "../../Admin.NET.Web.Entry/UpdateScripts/1.0.498.sql")));

        Assert.Contains("uk_s8_rule_handler", sql);
        Assert.Contains("idx_s8_rule_handler_user", sql);
        Assert.Contains("s8_498_BLOCKED_unique_index_missing", sql);
        Assert.Contains("s8_498_BLOCKED_cross_tenant_handler", sql);
        // 不写任何成员数据：成员是 per-tenant 人工配置，写死既不适配新租户也会覆盖管理员选择
        Assert.DoesNotContain("INSERT INTO `ado_s8_rule_handler_user`", sql);
        Assert.DoesNotContain("DELIMITER", sql);
    }
}