using CliFx;
using CliFx.Attributes;
using CliFx.Infrastructure;

namespace OpcUaCli.Commands;

[Command("connect", Description = "Test connection to an OPC UA server")]
public class ConnectCommand : ICommand
{
    /// <summary>
    /// Gets the OPC UA endpoint URL to test.
    /// </summary>
    [CommandOption("url", 'u', Description = "OPC UA server endpoint URL", IsRequired = true)]
    public string Url { get; init; } = default!;

    [CommandOption("username", 'U', Description = "Username for authentication")]
    public string? Username { get; init; }

    [CommandOption("password", 'P', Description = "Password for authentication")]
    public string? Password { get; init; }

    [CommandOption("security", 'S', Description = "Transport security: none, sign, encrypt (default: none)")]
    public string Security { get; init; } = "none";

    [CommandOption("failover-urls", 'F', Description = "Comma-separated failover endpoint URLs for redundancy")]
    public string? FailoverUrls { get; init; }

    /// <summary>
    /// Connects to the OPC UA endpoint and prints the resolved server metadata.
    /// </summary>
    /// <param name="console">The console used to report connection results.</param>
    public async ValueTask ExecuteAsync(IConsole console)
    {
        var urls = FailoverUrlParser.Parse(Url, FailoverUrls);
        using var failover = new OpcUaFailoverHelper(urls, Username, Password, Security);
        using var session = await failover.ConnectAsync();
        await console.Output.WriteLineAsync($"Connected to: {session.Endpoint.EndpointUrl}");
        await console.Output.WriteLineAsync($"Server: {session.Endpoint.Server!.ApplicationName}");
        await console.Output.WriteLineAsync($"Security Mode: {session.Endpoint.SecurityMode}");
        await console.Output.WriteLineAsync($"Security Policy: {session.Endpoint.SecurityPolicyUri}");
        await console.Output.WriteLineAsync("Connection successful.");
    }
}