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

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

/// <summary>
/// S8-CFG-NOTIFY-NONDEFAULT-ROLE-OPTIONS-FIX-1 的回归锁。
///
/// <para>缺陷本体：<c>GetRoleOptionsAsync</c> 曾按**默认租户的物理 SysRole.Id** 段筛选，
/// 于是任何非默认租户的角色候选恒为空。修复后必须按 **canonical Role Code** 在可信租户
/// 作用域内筛选。本文件把「Code 是逻辑身份、Id 是租户本地物理身份」这条契约钉死。</para>
/// </summary>
public class S8CanonicalRoleOptionsTests
{
    // 真实数据形态：同一 Code 在每个租户各有一行，Id 互不相同。
    private const long DefaultTenantOrderPlannerId = 1329908000101L; // 默认租户
    private const long UatTenantOrderPlannerId = 838257188253765L;   // UAT 租户
    private const long ThirdTenantOrderPlannerId = 797403760988229L; // 第三租户

    // ── canonical 定义本身 ────────────────────────────────────────────────

    /// <summary>canonical 集合必须正好是这 7 个业务角色码，顺序即产品展示序。</summary>
    [Fact]
    public void Canonical_IsExactlyTheSevenBusinessRoles()
    {
        Assert.Equal(
            new[]
            {
                "ROLE_ORDER_PLANNER", "ROLE_PRODUCTION_PLANNER", "ROLE_PURCHASER",
                "ROLE_WH_INBOUND", "ROLE_WH_OUTBOUND", "ROLE_QC", "ROLE_EQUIP_MAINT",
            },
            S8CanonicalRole.BusinessRoleCodes);
    }

    /// <summary>
    /// <c>sys_admin</c> 是平台系统角色，不在 S8 业务角色集内——
    /// 它不被任何一条生效通知层引用，不得混进租户的角色候选。
    /// </summary>
    [Fact]
    public void Canonical_DoesNotContainPlatformSysAdmin()
    {
        Assert.DoesNotContain("sys_admin", S8CanonicalRole.BusinessRoleCodes);
    }

    /// <summary>canonical 集合只能承载**逻辑身份**：任何 Code 都不得长得像物理 Id。</summary>
    [Fact]
    public void Canonical_CarriesNoTenantSpecificIdentity()
    {
        foreach (var code in S8CanonicalRole.BusinessRoleCodes)
            Assert.False(long.TryParse(code, out _), $"canonical code '{code}' 不得是数字物理 Id");
    }

    /// <summary>两个既有定义必须与 canonical 同源，否则又会人工分叉。</summary>
    [Fact]
    public void Canonical_IsTheSingleSourceForTenantProvisioning()
    {
        var field = typeof(Admin.NET.Plugin.AiDOP.Infrastructure.AidopTenantInitService)
            .GetProperty("S8BusinessRoles", BindingFlags.NonPublic | BindingFlags.Static)!;
        var roles = ((string Code, string Name, int OrderNo)[])field.GetValue(null)!;

        Assert.Same(S8CanonicalRole.BusinessRoles, roles);
    }

    // ── 核心回归：非默认租户 ──────────────────────────────────────────────

    /// <summary>
    /// **本缺陷的核心回归锁**：同一个 Code 在默认租户是 Id=A、在非默认租户是 Id=B。
    /// 可信作用域过滤后只剩 B，整形必须原样保留 B——绝不能出现 A。
    /// </summary>
    [Fact]
    public void NonDefaultTenant_YieldsTenantLocalRow_NotDefaultTenantRow()
    {
        // 可信租户过滤后，仓储只会返回本租户那一行。
        var scoped = new[] { (UatTenantOrderPlannerId, "ROLE_ORDER_PLANNER", "订单计划员") };

        var result = S8NotificationLayerService.ShapeRoleOptions(scoped);

        var only = Assert.Single(result);
        Assert.Equal(UatTenantOrderPlannerId, only.Id);
        Assert.NotEqual(DefaultTenantOrderPlannerId, only.Id);
        Assert.Equal("ROLE_ORDER_PLANNER", only.Code);
    }

    /// <summary>
    /// 跨租户负测：即便三个租户各有同 Code 的行，可信作用域只会交出当前租户那一行；
    /// 整形不得把其它租户的 Id 混进来。
    /// </summary>
    [Fact]
    public void CrossTenant_NoLeakage_OnlyCurrentTenantRowSurvives()
    {
        var scoped = new[] { (UatTenantOrderPlannerId, "ROLE_ORDER_PLANNER", "订单计划员") };

        var ids = S8NotificationLayerService.ShapeRoleOptions(scoped).Select(x => x.Id).ToList();

        Assert.DoesNotContain(DefaultTenantOrderPlannerId, ids);
        Assert.DoesNotContain(ThirdTenantOrderPlannerId, ids);
        Assert.Equal(new[] { UatTenantOrderPlannerId }, ids);
    }

    /// <summary>
    /// 筛选依据必须是 Code，不是物理 Id：候选行的 Id 与默认租户 Id 段毫无关系时，
    /// 依然必须被完整选出（旧实现在这里会返回空）。
    /// </summary>
    [Fact]
    public void Selection_IsByCode_NotByPhysicalIdRange()
    {
        var scoped = S8CanonicalRole.BusinessRoles
            .Select((r, i) => (Id: 900_000_000_000L + i, r.Code, r.Name))
            .ToArray();

        var result = S8NotificationLayerService.ShapeRoleOptions(scoped);

        Assert.Equal(7, result.Count);
        Assert.All(result, r => Assert.True(r.Id >= 900_000_000_000L));
        Assert.All(result, r => Assert.False(
            r.Id >= 1329908000101L && r.Id <= 1329908000107L, "不得出现默认租户物理 Id"));
    }

    // ── 排序 / 缺失 / 重复 ────────────────────────────────────────────────

    /// <summary>排序由 canonical OrderNo 决定，不由物理 Id 决定——即便 Id 顺序完全颠倒。</summary>
    [Fact]
    public void Ordering_FollowsCanonicalOrder_NotPhysicalId()
    {
        var reversed = S8CanonicalRole.BusinessRoles
            .Select((r, i) => (Id: 999L - i, r.Code, r.Name))   // Id 与 canonical 序相反
            .ToArray();

        var codes = S8NotificationLayerService.ShapeRoleOptions(reversed).Select(x => x.Code);

        Assert.Equal(S8CanonicalRole.BusinessRoleCodes, codes);
    }

    /// <summary>
    /// 缺失行为：canonical 白名单里某个 Code 在当前租户不存在时，
    /// 只是**不出现这一项**——不回落默认租户、不自动建角色、不抛异常。
    /// </summary>
    [Fact]
    public void MissingCanonicalRole_IsSimplyOmitted_NoFallbackNoThrow()
    {
        var partial = new[]
        {
            (10L, "ROLE_QC", "质检员"),
            (11L, "ROLE_PURCHASER", "采购员"),
        };

        var result = S8NotificationLayerService.ShapeRoleOptions(partial);

        Assert.Equal(new[] { "ROLE_PURCHASER", "ROLE_QC" }, result.Select(x => x.Code)); // 802 < 805
        Assert.DoesNotContain(result, x => x.Code == "ROLE_ORDER_PLANNER");
    }

    /// <summary>空作用域（该租户一个 canonical 角色都没有）返回空列表，而不是异常。</summary>
    [Fact]
    public void EmptyScope_ReturnsEmpty_NotThrow()
    {
        Assert.Empty(S8NotificationLayerService.ShapeRoleOptions(
            Array.Empty<(long, string, string)>()));
    }

    /// <summary>
    /// 重复 Code（DB 无唯一索引，属已登记技术债）必须**确定性**收敛为一项，
    /// 且取 Id 最小者——保证同一份数据每次给出同一个候选。
    /// </summary>
    [Fact]
    public void DuplicateCode_CollapsesDeterministically_ToLowestId()
    {
        var dup = new[]
        {
            (77L, "ROLE_QC", "质检员-B"),
            (55L, "ROLE_QC", "质检员-A"),
        };

        var only = Assert.Single(S8NotificationLayerService.ShapeRoleOptions(dup));
        Assert.Equal(55L, only.Id);
        Assert.Equal("质检员-A", only.Name);
    }

    /// <summary>整形对同一输入必须幂等且顺序稳定（跑两次结果逐项相同）。</summary>
    [Fact]
    public void Shaping_IsStableAcrossInvocations()
    {
        var rows = S8CanonicalRole.BusinessRoles
            .Select((r, i) => (Id: 500L + i, r.Code, r.Name)).ToArray();

        Assert.Equal(
            S8NotificationLayerService.ShapeRoleOptions(rows),
            S8NotificationLayerService.ShapeRoleOptions(rows));
    }
}