using System.Reflection;
using System.Text.RegularExpressions;
using System.Runtime.CompilerServices;
using Microsoft.AspNetCore.Mvc;
using Admin.NET.Plugin.AiDOP.Controllers.S8;
using Admin.NET.Plugin.AiDOP.Entity.S8;
using Admin.NET.Plugin.AiDOP.Infrastructure;
using Admin.NET.Plugin.AiDOP.Service.S8;
using Admin.NET.Plugin.AiDOP.Service.S8.Rules.DataAccess;
using Xunit;

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

/// <summary>
/// S8-RULE-GOVERNANCE-BATCH3：<b>业务侧根本不能创建 / 删除监控规则</b>。
///
/// <para>本文件取代了原 <c>S8DatasetOnlyRuleCreationTests</c>。那个名字守护的是
/// 「创建规则时只能选治理数据集」—— 一条已经过时的口径：现在不存在"创建规则"这件事，
/// 继续用那个名字会让读者以为 Rule Builder 还在，只是被限制了选项。</para>
///
/// <para>最终模型：</para>
/// <code>
///   业务需求 → 研发实现 S8RuleDefinition → S8RuleCatalog → Release
///            → S8RuleProvisioningService → 每租户一条 Runtime Policy（默认停用）
/// </code>
/// <para>用户能做的只有：调整已发布规则的运行参数、启停、预演、立即执行、暂停恢复。</para>
///
/// <para>原文件中仍然有效的断言（Legacy 类型不存在 / 数据集端点只读 / Rule 01 形态可表达）
/// 已逐条迁入本文件，未丢失覆盖。</para>
///
/// <para>不接 DB、不接 DI：退役守卫在**任何 DB 访问之前**抛出，因此用
/// <see cref="RuntimeHelpers.GetUninitializedObject"/> 绕开构造函数即可驱动。
/// 若将来有人把守卫挪到 DB 访问之后，本测试会因 NullReferenceException 失败 ——
/// 这正是我们要的信号：<b>守卫必须前置</b>。</para>
/// </summary>
public class S8RuleCreationRetiredTests
{
    private static readonly Assembly PluginAssembly = typeof(AdoS8WatchRule).Assembly;

    private static S8WatchRuleService Svc() =>
        (S8WatchRuleService)RuntimeHelpers.GetUninitializedObject(typeof(S8WatchRuleService));

    private static readonly S8TrustedScope Scope = new(838257186181189L);

    private static AdoS8WatchRule Body() => new()
    {
        RuleCode = "RULE_A_USER_INVENTED",
        SceneCode = "S1",
        RuleType = "TIMEOUT",
        DatasetCode = "PURCHASE_DELIVERY",
        WatchObjectType = "ORDER",
        PollIntervalSeconds = 300
    };

    // ───────────────────────── T1：创建能力 ─────────────────────────

    [Fact]
    public void T1_CreateAsync_IsRetired_WithGuidanceMessage()
    {
        var ex = Assert.Throws<S8WriteRetiredException>(() => { _ = Svc().CreateAsync(Body(), Scope); });

        Assert.Equal(S8WriteRetiredException.WatchRuleCreateMessage, ex.Message);

        // 文案必须说清"新规则从哪来"，否则用户只会以为接口坏了。
        Assert.Contains("系统版本定义", ex.Message);
        Assert.DoesNotContain("unsupported", ex.Message, StringComparison.OrdinalIgnoreCase);
        Assert.DoesNotContain("unknown", ex.Message, StringComparison.OrdinalIgnoreCase);

        // 与"整实体更新退役"是不同的事，文案不得混用。
        Assert.NotEqual(S8WriteRetiredException.WatchRuleUpdateMessage, ex.Message);
    }

    /// <summary>入参是否"合法"与能力是否存在无关：任何 body 都必须 410，且零 DB 访问。</summary>
    [Fact]
    public void T1_CreateAsync_IsRetired_RegardlessOfPayload()
    {
        Assert.Throws<S8WriteRetiredException>(() => { _ = Svc().CreateAsync(new AdoS8WatchRule(), Scope); });

        var wellFormed = Body();
        wellFormed.RuleCode = "RULE_S4_PURCHASE_DELIVERY_DATE_DELAY";   // 连"合法"的编码也不行
        Assert.Throws<S8WriteRetiredException>(() => { _ = Svc().CreateAsync(wellFormed, Scope); });
    }

    [Fact]
    public void T1_CreateEndpoint_Returns410_AndTouchesNoScope()
    {
        var action = Assert.Single(Actions(typeof(AdoS8ConfigWatchRulesController), "CreateAsync"));

        // 墓碑而非删 route：直接删会让遗留调用方拿到 405（该路径上还有 GET），
        // 而 405 说的是"方法不对"，会让人以为换个动词就能建。
        Assert.Single(action.GetCustomAttributes<HttpPostAttribute>());
        Assert.NotEmpty(action.GetCustomAttributes<ObsoleteAttribute>());

        // 同步返回：能力已退役，不该为构造一个用不到的 scope 去 await 组织库查询。
        Assert.Equal(typeof(IActionResult), action.ReturnType);
    }

    // ───────────────────────── T2：删除能力 ─────────────────────────

    [Fact]
    public void T2_DeleteAsync_IsRetired_AndPointsToDisable()
    {
        var ex = Assert.Throws<S8WriteRetiredException>(() => { _ = Svc().DeleteAsync(1329909460023L, Scope); });

        Assert.Equal(S8WriteRetiredException.WatchRuleDeleteMessage, ex.Message);
        Assert.Contains("停用", ex.Message);   // 必须给出正确的替代动作
    }

    [Theory]
    [InlineData(0L)]
    [InlineData(-1L)]
    [InlineData(long.MaxValue)]
    public void T2_DeleteAsync_IsRetired_RegardlessOfId(long id)
    {
        // 任意 id（含越权 id）一律 410 而非 404：
        // 「这个能力没了」优先于「这条记录不属于你」，避免越权探测反推他租户数据是否存在。
        Assert.Throws<S8WriteRetiredException>(() => { _ = Svc().DeleteAsync(id, Scope); });
    }

    [Fact]
    public void T2_DeleteEndpoint_Returns410()
    {
        var action = Assert.Single(Actions(typeof(AdoS8ConfigWatchRulesController), "DeleteAsync"));
        Assert.Single(action.GetCustomAttributes<HttpDeleteAttribute>());
        Assert.NotEmpty(action.GetCustomAttributes<ObsoleteAttribute>());
        Assert.Equal(typeof(IActionResult), action.ReturnType);
    }

    // ───────────────────────── T3 / T4 / T14 / T15：Wizard 全链消失 ─────────────────────────

    /// <summary>
    /// 向导后端整体退役。它的唯一出口是"生成规则"，而创建规则已经不存在，
    /// 草稿也就失去了全部意义 —— 不为"以后可能用"保留死代码。
    /// </summary>
    [Theory]
    [InlineData("Admin.NET.Plugin.AiDOP.Controllers.S8.AdoS8ConfigDraftsController")]
    [InlineData("Admin.NET.Plugin.AiDOP.Service.S8.S8ConfigDraftService")]
    [InlineData("Admin.NET.Plugin.AiDOP.Dto.S8.AdoS8ConfigDraftCreateDto")]
    [InlineData("Admin.NET.Plugin.AiDOP.Dto.S8.AdoS8ConfigDraftUpdateDto")]
    [InlineData("Admin.NET.Plugin.AiDOP.Dto.S8.AdoS8ConfigDraftGenerateRuleDto")]
    [InlineData("Admin.NET.Plugin.AiDOP.Dto.S8.AdoS8ConfigDraftDetailDto")]
    public void T3_T4_WizardBackendType_NoLongerExists(string fullName)
    {
        Assert.Null(PluginAssembly.GetType(fullName, throwOnError: false));
    }

    /// <summary>T14：整个程序集里不得再有任何 wizard-drafts 路由。</summary>
    [Fact]
    public void T14_NoWizardDraftRouteRemains()
    {
        var offenders = PluginAssembly.GetTypes()
            .Where(t => typeof(ControllerBase).IsAssignableFrom(t))
            .SelectMany(t => t.GetCustomAttributes<RouteAttribute>().Select(r => r.Template ?? string.Empty))
            .Where(t => t.Contains("wizard", StringComparison.OrdinalIgnoreCase)
                        || t.Contains("draft", StringComparison.OrdinalIgnoreCase))
            .ToArray();

        Assert.Empty(offenders);
    }

    /// <summary>
    /// T15：实体与表按既有口径 KEEP_TEMPORARILY（先退役 API、后物理清理）。
    ///
    /// <para><b>Batch 4 修正</b>：本用例原先断言「除实体自身外无任何类型消费它」，
    /// 那是基于 Batch 3 的一个错误结论 —— 当时审计认为草稿表只服务规则向导。
    /// 实际上主动提报页把 <c>mechanism = MANUAL_REPORT</c> 的行当作提报模板在用，
    /// Batch 3 把整个 Controller 删掉后该功能静默失效。</para>
    ///
    /// <para>现在的口径是：<b>只允许只读的模板服务消费它，且该服务不得有任何写能力</b>。
    /// 这比"零消费方"更准确，也仍然挡住"借草稿表复活建规则"。</para>
    /// </summary>
    [Fact]
    public void T15_ConfigDraftEntity_IsConsumedOnlyByReadOnlyTemplateService()
    {
        var entity = PluginAssembly.GetType("Admin.NET.Plugin.AiDOP.Entity.S8.AdoS8ConfigDraft", throwOnError: false);
        Assert.NotNull(entity);   // 表还在，等后续 schema cleanup

        var consumers = PluginAssembly.GetTypes()
            .Where(t => t != entity && !t.Name.Contains("Startup", StringComparison.Ordinal))
            // 排除编译器生成的 async 状态机：它们把外层 this 与局部变量提升成字段，
            // 因此会连带"持有"仓储类型，但那不是一个独立的消费方。
            .Where(t => !t.IsDefined(typeof(CompilerGeneratedAttribute), inherit: false))
            .Where(t => t.GetFields(BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public)
                .Any(f => f.FieldType.IsGenericType
                          && f.FieldType.GetGenericArguments().Contains(entity)))
            .Select(t => t.Name)
            .ToArray();

        Assert.Equal(new[] { "S8ReportTemplateService" }, consumers);
    }

    /// <summary>模板服务必须是纯读：出现任何写动词都意味着建规则那条路可能被绕回来。</summary>
    [Fact]
    public void T15_ReportTemplateService_IsReadOnly()
    {
        var t = PluginAssembly.GetType("Admin.NET.Plugin.AiDOP.Service.S8.S8ReportTemplateService", throwOnError: true)!;

        var publicMethods = t.GetMethods(BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly)
            .Select(m => m.Name).OrderBy(n => n, StringComparer.Ordinal).ToArray();

        Assert.Equal(new[] { "GetAsync", "ListAsync" }, publicMethods);

        foreach (var verb in new[] { "Create", "Update", "Delete", "Save", "Insert", "Generate", "Publish" })
            Assert.DoesNotContain(publicMethods, n => n.StartsWith(verb, StringComparison.Ordinal));
    }

    /// <summary>模板端点只有 GET，且用只读权限码而非规则配置权限码。</summary>
    [Fact]
    public void T15_ReportTemplateEndpoints_AreGetOnly()
    {
        var controller = PluginAssembly.GetType(
            "Admin.NET.Plugin.AiDOP.Controllers.S8.AdoS8ConfigReportTemplatesController", throwOnError: true)!;

        var actions = controller.GetMethods(BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly).ToArray();
        Assert.NotEmpty(actions);

        foreach (var m in actions)
        {
            Assert.NotEmpty(m.GetCustomAttributes<HttpGetAttribute>());
            Assert.Empty(m.GetCustomAttributes<HttpPostAttribute>());
            Assert.Empty(m.GetCustomAttributes<HttpPutAttribute>());
            Assert.Empty(m.GetCustomAttributes<HttpDeleteAttribute>());
            Assert.Empty(m.GetCustomAttributes<HttpPatchAttribute>());
        }

        var route = Assert.Single(controller.GetCustomAttributes<RouteAttribute>()).Template ?? string.Empty;
        Assert.DoesNotContain("draft", route, StringComparison.OrdinalIgnoreCase);
        Assert.DoesNotContain("wizard", route, StringComparison.OrdinalIgnoreCase);
    }

    // ───────────────────────── T5 / T13：其余入口 ─────────────────────────

    /// <summary>T5：CreateAsync 不再是业务生产写路径 —— 名字还在，但恒抛退役异常。</summary>
    [Fact]
    public void T5_CreateAsync_IsNotAProductionWritePath()
    {
        var m = typeof(S8WatchRuleService).GetMethod("CreateAsync",
            new[] { typeof(AdoS8WatchRule), typeof(S8TrustedScope) });
        Assert.NotNull(m);

        // 保留方法名而非删掉：断言"恒抛退役异常"比断言"名字不存在"更能防住有人换个名字复活它。
        Assert.Throws<S8WriteRetiredException>(() => { _ = Svc().CreateAsync(Body(), Scope); });

        // 无作用域重载不得存在。
        Assert.Null(typeof(S8WatchRuleService).GetMethod("CreateAsync", new[] { typeof(AdoS8WatchRule) }));
    }

    /// <summary>T13：TestAsync 已物理移除（能力被 GET /{id}/preview 完全覆盖）。</summary>
    [Fact]
    public void T13_TestEndpointAndServiceMethod_AreGone()
    {
        Assert.Null(typeof(S8WatchRuleService).GetMethods().FirstOrDefault(m => m.Name == "TestAsync"));
        Assert.Empty(Actions(typeof(AdoS8ConfigWatchRulesController), "TestAsync"));
    }

    // ───────────────────────── T6：唯一合法运行时创建源 ─────────────────────────

    /// <summary>
    /// T6：<b>Provisioning 是唯一合法的 runtime create source</b>。
    ///
    /// <para>注意这条守卫要表达的不是"任何 Insert 都非法" —— 那会误伤系统供给路径。
    /// 要表达的是：<c>用户/API 创建 = 禁止</c>，<c>代码供给 = 允许</c>。
    /// 因此用源码扫描找出所有对 <c>AdoS8WatchRule</c> 的 Insert 语句，
    /// 断言它们只出现在 <c>S8RuleProvisioningService</c> 里。</para>
    /// </summary>
    [Fact]
    public void T6_OnlyProvisioningInsertsWatchRules()
    {
        var root = PluginSourceRoot();
        var offenders = new List<string>();

        // 只认「声明为 SqlSugarRepository<AdoS8WatchRule> 的那个字段上的插入」。
        // 粗放地扫 AsInsertable 会误伤同一文件里对别的实体的写入 ——
        // S8WatchSchedulerService 就同时持有 watch rule 仓储（只读）与 detection state 仓储（要写）。
        var fieldDecl = new Regex(
            @"SqlSugarRepository<AdoS8WatchRule>\s+(_[A-Za-z0-9_]+)", RegexOptions.Compiled);

        foreach (var file in Directory.EnumerateFiles(root, "*.cs", SearchOption.AllDirectories))
        {
            var name = Path.GetFileName(file);
            if (name == "S8RuleProvisioningService.cs") continue;      // 唯一合法系统写路径

            var code = ExecutableLines(File.ReadAllText(file));
            var fields = fieldDecl.Matches(code).Select(m => m.Groups[1].Value).Distinct().ToArray();

            foreach (var line in code.Split('\n'))
            {
                var trimmed = line.Trim();

                // 形式一：显式泛型 Insertable<AdoS8WatchRule>
                if (trimmed.Contains("Insertable<AdoS8WatchRule>", StringComparison.Ordinal))
                    offenders.Add($"{name}: {trimmed}");

                // 形式二：在 watch rule 仓储字段上调用 AsInsertable / InsertAsync
                foreach (var f in fields)
                {
                    if (trimmed.Contains($"{f}.AsInsertable", StringComparison.Ordinal)
                        || trimmed.Contains($"{f}.InsertAsync", StringComparison.Ordinal))
                        offenders.Add($"{name}: {trimmed}");
                }
            }
        }

        Assert.True(offenders.Count == 0,
            "只有 S8RuleProvisioningService 允许创建监控规则运行策略行，以下位置出现了额外的写入：\n  "
            + string.Join("\n  ", offenders));
    }

    /// <summary>反向对照：守卫不是"恒为空"——供给服务里确实存在那唯一一处合法插入。</summary>
    [Fact]
    public void T6_ProvisioningItselfDoesInsert()
    {
        var code = File.ReadAllText(Path.Combine(PluginSourceRoot(), "Service", "S8", "S8RuleProvisioningService.cs"));
        Assert.Contains("_rep.AsInsertable(row)", code);
    }

    // ───────────────────────── 迁自原文件：仍然有效的断言 ─────────────────────────

    /// <summary>Legacy 取数 / 数据源相关类型全部不存在（与 S8LegacySymbolsRemovedTests 互补）。</summary>
    [Theory]
    [InlineData("Admin.NET.Plugin.AiDOP.Entity.S8.AdoS8DataSource")]
    [InlineData("Admin.NET.Plugin.AiDOP.Service.S8.S8DataSourceService")]
    [InlineData("Admin.NET.Plugin.AiDOP.Controllers.S8.AdoS8ConfigDataSourcesController")]
    [InlineData("Admin.NET.Plugin.AiDOP.Service.S8.Rules.S8DataSourceRowLoader")]
    [InlineData("Admin.NET.Plugin.AiDOP.Service.S8.Rules.S8SqlSugarScopeFactory")]
    [InlineData("Admin.NET.Plugin.AiDOP.Service.S8.Rules.DataAccess.S8LegacySqlDataProvider")]
    [InlineData("Admin.NET.Plugin.AiDOP.Service.S8.Rules.DataAccess.IS8LegacySqlDataProvider")]
    [InlineData("Admin.NET.Plugin.AiDOP.Service.S8.Rules.DataAccess.S8DataAccessMode")]
    [InlineData("Admin.NET.Plugin.AiDOP.Service.S8.Rules.DataAccess.S8RuleCreationPolicy")]
    [InlineData("Admin.NET.Plugin.AiDOP.Service.S8.Rules.DataAccess.S8RuleCreationOrigin")]
    // S8-RULE-GOVERNANCE-BATCH1：判定语义迁入代码定义后，三个 params 解析类一并删除。
    [InlineData("Admin.NET.Plugin.AiDOP.Service.S8.Rules.S8TimeoutParams")]
    [InlineData("Admin.NET.Plugin.AiDOP.Service.S8.Rules.S8ShortageParams")]
    [InlineData("Admin.NET.Plugin.AiDOP.Service.S8.Rules.S8OutOfRangeParams")]
    public void LegacyDataAccessType_NoLongerExists(string fullName)
    {
        Assert.Null(PluginAssembly.GetType(fullName, throwOnError: false));
    }

    /// <summary>
    /// 取代数据源端点的是一个**只读**目录。二者性质不同，不是改名：
    /// 旧的是租户可写的物理连接配置，新的是平台级只读目录。
    /// </summary>
    [Fact]
    public void DatasetsController_IsReadOnly()
    {
        var actions = typeof(AdoS8ConfigDatasetsController)
            .GetMethods(BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly)
            .ToArray();

        Assert.NotEmpty(actions);
        foreach (var m in actions)
        {
            Assert.Empty(m.GetCustomAttributes<HttpPostAttribute>());
            Assert.Empty(m.GetCustomAttributes<HttpPutAttribute>());
            Assert.Empty(m.GetCustomAttributes<HttpDeleteAttribute>());
            Assert.Empty(m.GetCustomAttributes<HttpPatchAttribute>());
        }
    }

    /// <summary>Rule 01 的数据集仍在目录内（供给出来的行必须能通过 Enable Gate 的目录检查）。</summary>
    [Fact]
    public void Rule01Dataset_RemainsDefinedInCatalog()
    {
        var catalog = new S8DatasetCatalog(new IS8DatasetDefinitionSource[]
        {
            new Admin.NET.Plugin.AiDOP.Service.S8.Rules.DataAccess.Providers.S8BusinessDatasetDefinitions()
        });

        Assert.True(catalog.IsDefined("PURCHASE_DELIVERY"));
    }

    // ───────────────────────── 保留能力不得回归 ─────────────────────────

    /// <summary>
    /// T9–T11：退役不得误伤仍然合法的能力。
    /// 少一个都意味着用户连"调整已发布规则的运行策略"都做不到了。
    /// </summary>
    [Theory]
    [InlineData("UpdateParametersAsync")]
    [InlineData("EnableAsync")]
    [InlineData("DisableAsync")]
    [InlineData("UpdateScheduleAsync")]
    [InlineData("RunNowAsync")]
    [InlineData("PauseAsync")]
    [InlineData("ResumeAsync")]
    [InlineData("ListAsync")]
    public void SurvivingCapabilities_AreIntact(string method)
    {
        Assert.NotEmpty(typeof(S8WatchRuleService).GetMethods().Where(m => m.Name == method));
    }

    [Theory]
    [InlineData("PreviewAsync", "GET")]
    [InlineData("ProvisionAsync", "POST")]
    [InlineData("EnableAsync", "POST")]
    [InlineData("DisableAsync", "POST")]
    [InlineData("UpdateParamsAsync", "PUT")]
    public void SurvivingEndpoints_AreIntact(string action, string verb)
    {
        var m = Assert.Single(Actions(typeof(AdoS8ConfigWatchRulesController), action));
        var has = verb switch
        {
            "GET" => m.GetCustomAttributes<HttpGetAttribute>().Any(),
            "POST" => m.GetCustomAttributes<HttpPostAttribute>().Any(),
            "PUT" => m.GetCustomAttributes<HttpPutAttribute>().Any(),
            _ => false
        };
        Assert.True(has, $"{action} 必须仍是 {verb}");
    }

    private static IEnumerable<MethodInfo> Actions(Type controller, string name) =>
        controller.GetMethods(BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly)
            .Where(m => m.Name == name);

    private static string PluginSourceRoot()
    {
        var dir = new DirectoryInfo(AppContext.BaseDirectory);
        while (dir != null && !Directory.Exists(Path.Combine(dir.FullName, "Admin.NET.Plugin.AiDOP")))
            dir = dir.Parent;
        Assert.NotNull(dir);
        return Path.Combine(dir!.FullName, "Admin.NET.Plugin.AiDOP");
    }

    /// <summary>只取可执行代码行：注释里为留档会复述旧写法，不应算违规。</summary>
    private static string ExecutableLines(string code) =>
        string.Join('\n', code.Split('\n')
            .Where(l =>
            {
                var t = l.TrimStart();
                return !t.StartsWith("///", StringComparison.Ordinal)
                       && !t.StartsWith("//", StringComparison.Ordinal)
                       && !t.StartsWith("*", StringComparison.Ordinal);
            }));
}