using Admin.NET.Plugin.AiDOP.Entity.S8;
using Admin.NET.Plugin.AiDOP.Service.S8;
using Admin.NET.Plugin.AiDOP.Service.S8.Rules;
using Admin.NET.Plugin.AiDOP.Service.S8.Rules.DataAccess;
using Xunit;

namespace Admin.NET.Test.S8;

/// <summary>
/// 规则取数配置校验。
///
/// S8-DATASET-FOUNDATION-HARDENING-2 起分两级：
///   · ValidateForSave   —— 结构 + 目录归属，不要求 Provider 已上线（允许存草稿）；
///   · ValidateForEnable —— 完整运行条件（委托 Enable Gate）。
/// </summary>
public class S8WatchRuleDataAccessValidatorTests
{
    private const string ReadyDataset = "FAKE_VALIDATOR_DATASET";
    private const string DefinedNoProvider = "FAKE_VALIDATOR_DATASET_NO_PROVIDER";

    private static S8DatasetCapabilities TimeoutCapable() => new()
    {
        SupportsTimeout = true,
        HasSourceObjectId = true,
        HasRelatedObjectCode = true,
        HasDueAt = true,
        HasStatus = true
    };

    private sealed class FakeSource : IS8DatasetDefinitionSource
    {
        public IEnumerable<S8DatasetDefinition> GetDefinitions() => new[]
        {
            new S8DatasetDefinition
            {
                DatasetCode = ReadyDataset,
                DisplayName = "校验测试数据集",
                Kind = S8DatasetKind.Object,
                Capabilities = TimeoutCapable()
            },
            new S8DatasetDefinition
            {
                DatasetCode = DefinedNoProvider,
                DisplayName = "已定义未实现数据集",
                Kind = S8DatasetKind.Object,
                Capabilities = TimeoutCapable()
            }
        };
    }

    private sealed class TimeoutOnlyProvider : IS8MonitoringDataProvider
    {
        public string DatasetCode => ReadyDataset;
        public S8DatasetCapabilities Capabilities => TimeoutCapable();
        public Task<S8MonitoringRowSet> LoadAsync(S8MonitoringDataRequest request, CancellationToken cancellationToken = default)
            => Task.FromResult(S8MonitoringRowSet.Empty);
    }

    private static S8DatasetCatalog Catalog() => new(new[] { new FakeSource() });
    private static S8DatasetEnableGate Gate() =>
        new(Catalog(), new S8MonitoringDataProviderRegistry(new[] { new TimeoutOnlyProvider() }));

    private static AdoS8WatchRule Rule(string ruleType, string mode = null, string datasetCode = null, string expression = null) => new()
    {
        RuleCode = "UT_RULE",
        RuleType = ruleType,
        DataAccessMode = mode,
        DatasetCode = datasetCode,
        Expression = expression
    };

    // ---------- Legacy ----------

    [Fact]
    public void LegacyRule_WithNullMode_AndExpression_IsAccepted()
    {
        // 132 条历史规则的形态：mode=NULL、dataset_code=NULL、expression 有值。
        S8WatchRuleDataAccessValidator.ValidateForSave(
            Rule("TIMEOUT", mode: null, datasetCode: null, expression: "SELECT 1"), Catalog());
    }

    [Fact]
    public void LegacyRule_WithoutExpression_IsRejected()
    {
        var ex = Assert.Throws<S8BizException>(() =>
            S8WatchRuleDataAccessValidator.ValidateForSave(Rule("TIMEOUT", expression: null), Catalog()));
        Assert.Contains("expression", ex.Message);
    }

    [Fact]
    public void LegacyRule_MustNotCarryDatasetCode()
    {
        // 两种模式的字段混填会让实际生效路径不可预测，必须显式拒绝。
        var rule = Rule("TIMEOUT", mode: S8DataAccessMode.LegacySql, datasetCode: ReadyDataset, expression: "SELECT 1");
        Assert.Throws<S8BizException>(() => S8WatchRuleDataAccessValidator.ValidateForSave(rule, Catalog()));
    }

    [Fact]
    public void LegacyRule_PassesEnableGate_WithoutDatasetChecks()
    {
        var rule = Rule("TIMEOUT", mode: null, expression: "SELECT 1");
        S8WatchRuleDataAccessValidator.ValidateForEnable(rule, Gate(), 1, 1);
    }

    // ---------- Standard dataset · Save ----------

    [Fact]
    public void StandardDatasetRule_WithoutDatasetCode_IsRejectedOnSave()
    {
        var ex = Assert.Throws<S8BizException>(() =>
            S8WatchRuleDataAccessValidator.ValidateForSave(
                Rule("TIMEOUT", mode: S8DataAccessMode.StandardDataset), Catalog()));
        Assert.Contains(S8DatasetReasonCode.CodeMissing, ex.Message);
    }

    [Fact]
    public void StandardDatasetRule_WithUndefinedDataset_IsRejectedOnSave()
    {
        var ex = Assert.Throws<S8BizException>(() =>
            S8WatchRuleDataAccessValidator.ValidateForSave(
                Rule("TIMEOUT", mode: S8DataAccessMode.StandardDataset, datasetCode: "NO_SUCH_DATASET"), Catalog()));
        Assert.Contains(S8DatasetReasonCode.NotDefined, ex.Message);
    }

    [Fact]
    public void StandardDatasetRule_DefinedButProviderMissing_CanBeSavedAsDraft()
    {
        // 关键行为：Provider 未上线时仍可保存配置。
        S8WatchRuleDataAccessValidator.ValidateForSave(
            Rule("TIMEOUT", mode: S8DataAccessMode.StandardDataset, datasetCode: DefinedNoProvider), Catalog());
    }

    // ---------- Standard dataset · Enable ----------

    [Fact]
    public void StandardDatasetRule_DefinedButProviderMissing_CannotBeEnabled()
    {
        var ex = Assert.Throws<S8BizException>(() =>
            S8WatchRuleDataAccessValidator.ValidateForEnable(
                Rule("TIMEOUT", mode: S8DataAccessMode.StandardDataset, datasetCode: DefinedNoProvider),
                Gate(), 1, 1));
        Assert.Contains(S8DatasetReasonCode.ProviderNotRegistered, ex.Message);
    }

    [Fact]
    public void StandardDatasetRule_WithCapabilityMismatch_CannotBeEnabled()
    {
        // TIMEOUT-only 数据集挂 OUT_OF_RANGE 规则。
        var ex = Assert.Throws<S8BizException>(() =>
            S8WatchRuleDataAccessValidator.ValidateForEnable(
                Rule("OUT_OF_RANGE", mode: S8DataAccessMode.StandardDataset, datasetCode: ReadyDataset),
                Gate(), 1, 1));
        Assert.Contains(S8DatasetReasonCode.CapabilityMismatch, ex.Message);
    }

    [Fact]
    public void StandardDatasetRule_Matching_IsEnabled_WithoutAnySql()
    {
        // 标准数据集规则不需要用户填写任何 SQL。
        var rule = Rule("TIMEOUT", mode: S8DataAccessMode.StandardDataset, datasetCode: ReadyDataset, expression: null);
        S8WatchRuleDataAccessValidator.ValidateForSave(rule, Catalog());
        S8WatchRuleDataAccessValidator.ValidateForEnable(rule, Gate(), 1, 1);
    }

    // ---------- 其他 ----------

    [Fact]
    public void UnknownDataAccessMode_IsRejected()
    {
        Assert.Throws<S8BizException>(() =>
            S8WatchRuleDataAccessValidator.ValidateForSave(
                Rule("TIMEOUT", mode: "SOMETHING_ELSE", expression: "SELECT 1"), Catalog()));
    }

    [Fact]
    public void RequiresDataSource_TrueForLegacy_FalseForStandardDataset()
    {
        // LEGACY_SQL 仍必须绑定可信作用域内的数据源；STANDARD_DATASET 无物理数据源概念。
        Assert.True(S8WatchRuleDataAccessValidator.RequiresDataSource(Rule("TIMEOUT", mode: null)));
        Assert.True(S8WatchRuleDataAccessValidator.RequiresDataSource(Rule("TIMEOUT", mode: S8DataAccessMode.LegacySql)));
        Assert.False(S8WatchRuleDataAccessValidator.RequiresDataSource(
            Rule("TIMEOUT", mode: S8DataAccessMode.StandardDataset, datasetCode: ReadyDataset)));
    }
}