namespace ZB.MOM.WW.OtOpcUa.Driver.AbCip;

/// <summary>
///     AB CIP / EtherNet-IP driver configuration, bound from the driver's <c>DriverConfig</c>
///     JSON at <c>DriverHost.RegisterAsync</c>. One instance supports N devices (PLCs) behind
///     the same driver; per-device routing is keyed on <see cref="AbCipDeviceOptions.HostAddress"/>
///     via <c>IPerCallHostResolver</c>.
/// </summary>
/// <remarks>
///     Per v2 plan decisions #11 (libplctag), #41 (AbCip vs AbLegacy split), #143–144 (per-call
///     host resolver + resilience keys), #144 (bulkhead keyed on <c>(DriverInstanceId, HostName)</c>).
/// </remarks>
public sealed class AbCipDriverOptions
{
    /// <summary>
    ///     PLCs this driver instance talks to. Each device contributes its own <see cref="AbCipHostAddress"/>
    ///     string as the <c>hostName</c> key used by resilience pipelines and the Admin UI.
    /// </summary>
    public IReadOnlyList<AbCipDeviceOptions> Devices { get; init; } = [];

    /// <summary>Pre-declared tag map across all devices — AB discovery lands in PR 5.</summary>
    public IReadOnlyList<AbCipTagDefinition> Tags { get; init; } = [];

    /// <summary>Per-device probe settings. Falls back to defaults when omitted.</summary>
    public AbCipProbeOptions Probe { get; init; } = new();

    /// <summary>
    ///     Default libplctag call timeout applied to reads/writes/discovery when the caller does
    ///     not pass a more specific value. Matches the Modbus driver's 2-second default.
    /// </summary>
    public TimeSpan Timeout { get; init; } = TimeSpan.FromSeconds(2);
}

/// <summary>
///     One PLC endpoint. <see cref="HostAddress"/> must parse via
///     <see cref="AbCipHostAddress.TryParse"/>; misconfigured devices fail driver
///     initialization rather than silently connecting to nothing.
/// </summary>
/// <param name="HostAddress">Canonical <c>ab://gateway[:port]/cip-path</c> string.</param>
/// <param name="PlcFamily">Which per-family profile to apply. Determines ConnectionSize,
///     request-packing support, unconnected-only hint, and other quirks.</param>
/// <param name="DeviceName">Optional display label for Admin UI. Falls back to <see cref="HostAddress"/>.</param>
public sealed record AbCipDeviceOptions(
    string HostAddress,
    AbCipPlcFamily PlcFamily = AbCipPlcFamily.ControlLogix,
    string? DeviceName = null);

/// <summary>
///     One AB-backed OPC UA variable. Mirrors the <c>ModbusTagDefinition</c> shape.
/// </summary>
/// <param name="Name">Tag name; becomes the OPC UA browse name and full reference.</param>
/// <param name="DeviceHostAddress">Which device (<see cref="AbCipDeviceOptions.HostAddress"/>) this tag lives on.</param>
/// <param name="TagPath">Logix symbolic path (controller or program scope).</param>
/// <param name="DataType">Logix atomic type, or <see cref="AbCipDataType.Structure"/> for UDT-typed tags.</param>
/// <param name="Writable">When <c>true</c> and the tag's ExternalAccess permits writes, IWritable routes writes here.</param>
/// <param name="WriteIdempotent">Per plan decisions #44–#45, #143 — safe to replay on write timeout. Default <c>false</c>.</param>
/// <param name="Members">For <see cref="AbCipDataType.Structure"/>-typed tags, the declared UDT
///     member layout. When supplied, discovery fans out the UDT into a folder + one Variable per
///     member (member TagPath = <c>{tag.TagPath}.{member.Name}</c>). When <c>null</c> on a Structure
///     tag, the driver treats it as a black-box and relies on downstream configuration to address
///     members individually via dotted <see cref="AbCipTagPath"/> syntax. Ignored for atomic types.</param>
/// <param name="SafetyTag">GuardLogix safety-partition tag hint. When <c>true</c>, the driver
///     forces <c>SecurityClassification.ViewOnly</c> on discovery regardless of
///     <paramref name="Writable"/> — safety tags can only be written from the safety task of a
///     GuardLogix controller; non-safety writes violate the safety-partition isolation and are
///     rejected by the PLC anyway. Surfaces the intent explicitly instead of relying on the
///     write attempt failing at runtime.</param>
public sealed record AbCipTagDefinition(
    string Name,
    string DeviceHostAddress,
    string TagPath,
    AbCipDataType DataType,
    bool Writable = true,
    bool WriteIdempotent = false,
    IReadOnlyList<AbCipStructureMember>? Members = null,
    bool SafetyTag = false);

/// <summary>
///     One declared member of a UDT tag. Name is the member identifier on the PLC (e.g. <c>Speed</c>,
///     <c>Status</c>), DataType is the atomic Logix type, Writable/WriteIdempotent mirror
///     <see cref="AbCipTagDefinition"/>. Declaration-driven — the real CIP Template Object reader
///     (class 0x6C) that would auto-discover member layouts lands as a follow-up PR.
/// </summary>
public sealed record AbCipStructureMember(
    string Name,
    AbCipDataType DataType,
    bool Writable = true,
    bool WriteIdempotent = false);

/// <summary>Which AB PLC family the device is — selects the profile applied to connection params.</summary>
public enum AbCipPlcFamily
{
    ControlLogix,
    CompactLogix,
    Micro800,
    GuardLogix,
}

/// <summary>
///     Background connectivity-probe settings. Enabled by default; the probe reads a cheap tag
///     on the PLC at the configured interval to drive <see cref="Core.Abstractions.IHostConnectivityProbe"/>
///     state transitions + Admin UI health status.
/// </summary>
public sealed class AbCipProbeOptions
{
    public bool Enabled { get; init; } = true;
    public TimeSpan Interval { get; init; } = TimeSpan.FromSeconds(5);
    public TimeSpan Timeout { get; init; } = TimeSpan.FromSeconds(2);

    /// <summary>
    ///     Tag path used for the probe. If null, the driver attempts to read a default
    ///     system tag (PR 8 wires this up — the choice is family-dependent, e.g.
    ///     <c>@raw_cpu_type</c> on ControlLogix or a user-configured probe tag on Micro800).
    /// </summary>
    public string? ProbeTagPath { get; init; }
}