// Copyright (c) 2011 - 2019 Ed Charbeneau
// License: MIT
// See https://github.com/EdCharbeneau

using System;

namespace Connected.Utilities
{
    public class ValueBuilder
    {
        private string stringBuffer;

        public bool HasValue => !string.IsNullOrWhiteSpace(stringBuffer);
        /// <summary>
        /// Adds a space separated conditional value to a property.
        /// </summary>
        /// <param name="value"></param>
        /// <param name="when"></param>
        /// <returns></returns>
        public ValueBuilder AddValue(string value, bool when = true) => when ? AddRaw($"{value} ") : this;
        public ValueBuilder AddValue(Func<string> value, bool when = true) => when ? AddRaw($"{value()} ") : this;

        private ValueBuilder AddRaw(string style)
        {
            stringBuffer += style;
            return this;
        }

        public override string ToString() => stringBuffer != null ? stringBuffer.Trim() : string.Empty;
    }
}