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

/// <summary>
/// S8-NOTIFY-RECIPIENT-1：通知事件码。
///
/// <para><b>每一条都对应一个真实存在的派发点</b>（见 <c>TriggerHint</c>）。
/// 刻意不造没有业务入口的事件 —— 配了却永远不触发的通知，比没有通知更难排查。</para>
/// </summary>
public static class S8NotifyEventCode
{
    /// <summary>规则命中建单 / 人工提报建单。</summary>
    public const string ExceptionCreated = "EXCEPTION_CREATED";

    /// <summary>被认领。</summary>
    public const string ExceptionClaimed = "EXCEPTION_CLAIMED";

    /// <summary>被转派。</summary>
    public const string ExceptionTransferred = "EXCEPTION_TRANSFERRED";

    /// <summary>提交复核（等待审核）。</summary>
    public const string VerificationSubmitted = "VERIFICATION_SUBMITTED";

    /// <summary>超时自动升级。</summary>
    public const string EscalationTriggered = "ESCALATION_TRIGGERED";

    /// <summary>检测到恢复。</summary>
    public const string ExceptionRecovered = "EXCEPTION_RECOVERED";

    /// <summary>超时关闭（闭环及时性回顾）。</summary>
    public const string ExceptionOverdueClosed = "EXCEPTION_OVERDUE_CLOSED";
}

/// <summary>
/// 收件人类型。<b>第一版只有四类，全部能真实解析出 SysUserId</b>。
///
/// <para><b>Supervisor 刻意缺席</b>：系统里不存在组织主管关系
/// （<c>SysOrg.DirectorId</c> 与 <c>SysUser.ManagerUserId</c> 实测填充率均为 0）。
/// 给一个永远解析为空的选项，等于让管理员配一条永远发不出去的通知。</para>
/// </summary>
public static class S8RecipientType
{
    /// <summary>该规则的处理账号池（复用 P1-C 的 Rule Handler Pool，不复制第二份人员配置）。</summary>
    public const string HandlerPool = "HANDLER_POOL";

    /// <summary>当前处理人（<c>assignee_user_id</c>）。</summary>
    public const string Assignee = "ASSIGNEE";

    /// <summary>
    /// 当前实际审核人。
    /// <para><b>不是新建的 Reviewer Pool</b> —— 它解析的是<b>当前事实</b>：
    /// 优先取单据上的 <c>verifier_user_id</c>（提交复核时手选、真正能点通过/退回的人）；
    /// 尚未提交复核时回落到审批流节点解析出的审批人。</para>
    /// </summary>
    public const string Reviewer = "REVIEWER";

    /// <summary>指定账号（多选 SysUser）。</summary>
    public const string SpecificUser = "SPECIFIC_USER";
}

/// <summary>事件元信息。</summary>
public sealed record S8NotifyEventDefinition(string Code, string DisplayName, string TriggerHint, int OrderNo);

/// <summary>
/// 事件与收件人类型目录。后端派发、配置校验、前端 UI 三方共用同一份，
/// 避免出现「页面能配、后端根本不派发」或反之。
/// </summary>
public static class S8NotificationCatalog
{
    public static readonly IReadOnlyList<S8NotifyEventDefinition> Events = new List<S8NotifyEventDefinition>
    {
        new(S8NotifyEventCode.ExceptionCreated, "异常产生", "规则命中建单 / 人工提报", 10),
        new(S8NotifyEventCode.ExceptionClaimed, "认领成功", "POST {id}/claim", 20),
        new(S8NotifyEventCode.ExceptionTransferred, "转派", "POST {id}/transfer", 30),
        new(S8NotifyEventCode.VerificationSubmitted, "提交复核", "POST {id}/submit-verification", 40),
        new(S8NotifyEventCode.EscalationTriggered, "超时升级", "超时自动升级作业", 50),
        new(S8NotifyEventCode.ExceptionRecovered, "异常恢复", "调度器检测到恢复", 60),
        new(S8NotifyEventCode.ExceptionOverdueClosed, "超时关闭", "检验通过后闭环及时性回顾", 70),
    };

    public static readonly IReadOnlyList<string> RecipientTypes = new[]
    {
        S8RecipientType.HandlerPool,
        S8RecipientType.Assignee,
        S8RecipientType.Reviewer,
        S8RecipientType.SpecificUser,
    };

    /// <summary>
    /// 租户级默认配置的 <c>rule_code</c> 哨兵值。
    /// <para>人工提报的异常没有来源规则，它的通知只能落在租户级默认上。
    /// 用显式常量而不是 NULL：NULL 在唯一索引里的比较语义容易让人配出两条"默认"。</para>
    /// </summary>
    public const string TenantDefaultRuleCode = "*";

    private static readonly HashSet<string> EventSet =
        Events.Select(e => e.Code).ToHashSet(StringComparer.OrdinalIgnoreCase);
    private static readonly HashSet<string> TypeSet =
        RecipientTypes.ToHashSet(StringComparer.OrdinalIgnoreCase);

    public static bool IsKnownEvent(string? code) => !string.IsNullOrWhiteSpace(code) && EventSet.Contains(code!);
    public static bool IsKnownRecipientType(string? t) => !string.IsNullOrWhiteSpace(t) && TypeSet.Contains(t!);
}