using CliFx.Attributes;
using ZB.MOM.WW.OtOpcUa.Driver.Cli.Common;
using S7NetCpuType = global::S7.Net.CpuType;

namespace ZB.MOM.WW.OtOpcUa.Driver.S7.Cli;

/// <summary>
///     Base for every S7 CLI command. Carries the ISO-on-TCP endpoint options
///     (host / port / CPU type / rack / slot) that S7.Net needs for its handshake +
///     exposes <see cref="BuildOptions"/> so each command can synthesise an
///     <see cref="S7DriverOptions"/> on demand.
/// </summary>
public abstract class S7CommandBase : DriverCommandBase
{
    [CommandOption("host", 'h', Description = "PLC IP address or hostname.", IsRequired = true)]
    public string Host { get; init; } = default!;

    [CommandOption("port", 'p', Description = "ISO-on-TCP port (default 102).")]
    public int Port { get; init; } = 102;

    [CommandOption("cpu", 'c', Description =
        "S7 CPU family: S7200 / S7200Smart / S7300 / S7400 / S71200 / S71500 " +
        "(default S71500). Determines the ISO-TSAP slot byte.")]
    public S7NetCpuType CpuType { get; init; } = S7NetCpuType.S71500;

    [CommandOption("rack", Description = "Rack number (default 0 — single-rack).")]
    public short Rack { get; init; } = 0;

    [CommandOption("slot", Description =
        "CPU slot. S7-300 = 2, S7-400 = 2 or 3, S7-1200 / S7-1500 = 0 (default 0).")]
    public short Slot { get; init; } = 0;

    [CommandOption("timeout-ms", Description = "Per-operation timeout in ms (default 5000).")]
    public int TimeoutMs { get; init; } = 5000;

    [CommandOption("tsap-mode", Description =
        "ISO-on-TCP / S7comm connection class: Auto (default — S7netplus picks the TSAP " +
        "from --cpu), Pg, Op, S7Basic, or Other (requires --local-tsap and --remote-tsap). " +
        "Hardened S7-1500 / ET 200SP CPUs may refuse PG and require Op or S7Basic. See " +
        "docs/v2/s7.md \"TSAP / Connection Type\" for the byte table and motivation.")]
    public TsapMode TsapMode { get; init; } = TsapMode.Auto;

    [CommandOption("local-tsap", Description =
        "Optional 16-bit local TSAP override (e.g. 0x4D57). Required when --tsap-mode is Other; " +
        "wins over the class default under Pg/Op/S7Basic.")]
    public ushort? LocalTsap { get; init; }

    [CommandOption("remote-tsap", Description =
        "Optional 16-bit remote TSAP override. Required when --tsap-mode is Other; wins over " +
        "the class default under Pg/Op/S7Basic.")]
    public ushort? RemoteTsap { get; init; }

    /// <inheritdoc />
    public override TimeSpan Timeout
    {
        get => TimeSpan.FromMilliseconds(TimeoutMs);
        init { /* driven by TimeoutMs */ }
    }

    /// <summary>
    ///     Build an <see cref="S7DriverOptions"/> with the endpoint fields this base
    ///     collected + whatever <paramref name="tags"/> the subclass declares. Probe
    ///     disabled — CLI runs are one-shot.
    /// </summary>
    protected S7DriverOptions BuildOptions(IReadOnlyList<S7TagDefinition> tags) => new()
    {
        Host = Host,
        Port = Port,
        CpuType = CpuType,
        Rack = Rack,
        Slot = Slot,
        Timeout = Timeout,
        Tags = tags,
        Probe = new S7ProbeOptions { Enabled = false },
        TsapMode = TsapMode,
        LocalTsap = LocalTsap,
        RemoteTsap = RemoteTsap,
    };

    protected string DriverInstanceId => $"s7-cli-{Host}:{Port}";
}