using System;
using System.Collections.Generic;
using System.Text;

namespace FrostFS.SDK.ModelsV2;

public class ClientSettings
{
    protected static readonly string errorTemplate = "{0} is required parameter";

    public string Host { get; set; } = string.Empty;

    public virtual void Validate()
    {
        var errors = CheckFields();
        if (errors != null) 
            ThrowException(errors);
    }

    protected List<string>? CheckFields()
    {
        List<string>? errors = null;

        if (string.IsNullOrWhiteSpace(Host))
            (errors ??= []).Add(string.Format(errorTemplate, nameof(Host)));

        return errors;
    }

    protected static void ThrowException(List<string> errors)
    {  
        StringBuilder messages = new();

        foreach (var error in errors)
        {
            messages.AppendLine(error);
        }

        throw new ArgumentException(messages.ToString());
    }
}

public class SingleOwnerClientSettings : ClientSettings
{
    public string Key { get; set; } = string.Empty;

    public override void Validate()
    {
        var errors = CheckFields();
        if (errors != null)
            ThrowException(errors);       
    }

    protected List<string>? CheckFields()
    {
        List<string>? errors = base.CheckFields();

        if (string.IsNullOrWhiteSpace(Key))
            (errors ??= []).Add(string.Format(errorTemplate, nameof(Key)));

        return errors;
    }  
}