using System.Collections.Generic;

namespace ZB.MOM.WW.OtOpcUa.Host.Configuration
{
    /// <summary>
    ///     Wonderware Historian SDK configuration for OPC UA historical data access.
    /// </summary>
    public class HistorianConfiguration
    {
        /// <summary>
        ///     Gets or sets a value indicating whether OPC UA historical data access is enabled.
        /// </summary>
        public bool Enabled { get; set; } = false;

        /// <summary>
        ///     Gets or sets the single Historian server hostname used when <see cref="ServerNames"/>
        ///     is empty. Preserved for backward compatibility with pre-cluster deployments.
        /// </summary>
        public string ServerName { get; set; } = "localhost";

        /// <summary>
        ///     Gets or sets the ordered list of Historian cluster nodes. When non-empty, this list
        ///     supersedes <see cref="ServerName"/>: the data source attempts each node in order on
        ///     connect, falling through to the next on failure. A failed node is placed in cooldown
        ///     for <see cref="FailureCooldownSeconds"/> before being re-eligible.
        /// </summary>
        public List<string> ServerNames { get; set; } = new();

        /// <summary>
        ///     Gets or sets the cooldown window, in seconds, that a historian node is skipped after
        ///     a connection failure. A value of zero retries the node on every request. Default 60s.
        /// </summary>
        public int FailureCooldownSeconds { get; set; } = 60;

        /// <summary>
        ///     Gets or sets a value indicating whether Windows Integrated Security is used.
        ///     When false, <see cref="UserName"/> and <see cref="Password"/> are used instead.
        /// </summary>
        public bool IntegratedSecurity { get; set; } = true;

        /// <summary>
        ///     Gets or sets the username for Historian authentication when <see cref="IntegratedSecurity"/> is false.
        /// </summary>
        public string? UserName { get; set; }

        /// <summary>
        ///     Gets or sets the password for Historian authentication when <see cref="IntegratedSecurity"/> is false.
        /// </summary>
        public string? Password { get; set; }

        /// <summary>
        ///     Gets or sets the Historian server TCP port.
        /// </summary>
        public int Port { get; set; } = 32568;

        /// <summary>
        ///     Gets or sets the packet timeout in seconds for Historian SDK operations.
        /// </summary>
        public int CommandTimeoutSeconds { get; set; } = 30;

        /// <summary>
        ///     Gets or sets the maximum number of values returned per HistoryRead request.
        /// </summary>
        public int MaxValuesPerRead { get; set; } = 10000;

        /// <summary>
        ///     Gets or sets an outer safety timeout, in seconds, applied to sync-over-async Historian
        ///     operations invoked from the OPC UA stack thread (HistoryReadRaw, HistoryReadProcessed,
        ///     HistoryReadAtTime, HistoryReadEvents). This is a backstop for the case where a
        ///     historian query hangs outside <see cref="CommandTimeoutSeconds"/> — e.g., a slow SDK
        ///     reconnect or mid-failover cluster node. Must be comfortably larger than
        ///     <see cref="CommandTimeoutSeconds"/> so normal operation is never affected. Default 60s.
        /// </summary>
        public int RequestTimeoutSeconds { get; set; } = 60;
    }
}