using System;
using System.Diagnostics;
using System.IO;
using System.Xml;
using Emergent.Gamebryo.SceneDesigner.PluginAPI;
using Emergent.Gamebryo.SceneDesigner.PluginAPI.StandardServices;

namespace Emergent.Gamebryo.SceneDesigner.StdPluginsCs.UIBinding
{
	/// <summary>
	/// Summary description for OptionsBindingsBuilder.
	/// </summary>
	internal class OptionsBindingsBuilder : AbstractBuilder
	{
        #region Private Data
        private ServiceProvider m_provider;
        private IUICommandService m_commandService;
        private IOptionsService m_optionsService;
        #endregion

        public OptionsBindingsBuilder()
		{
            m_provider = ServiceProvider.Instance;
            m_commandService = m_provider.GetService(typeof(IUICommandService))
                as IUICommandService;
            m_optionsService = m_provider.GetService(typeof(IOptionsService))
                as IOptionsService;
        }

	    public override void Build(Stream xmlStream)
	    {
            XmlDocument domObject = ReadXML(xmlStream);
	        XmlNodeList items = 
                domObject.DocumentElement.SelectNodes("Category");
            BuildFromNodeList(items, "");

	    }

	    private void BuildFromNodeList(XmlNodeList items, string rootCategory)
	    {
            foreach (XmlNode node in items)
            {
                string categoryName = rootCategory 
                    + node.SelectSingleNode("@name").Value;
                XmlNodeList optionList = node.SelectNodes("Option");
                if (optionList != null)
                {
                    foreach(XmlNode option in optionList)
                    {
                        string optionName = 
                            categoryName + "." + 
                            option.SelectSingleNode(@"@name").Value;
                        XmlNode settingNode = 
                            option.SelectSingleNode(@"SettingsObject");
                        string storeName = 
                            settingNode.SelectSingleNode(@"@store").Value;
                        string settingName =
                            settingNode.SelectSingleNode(@"@name").Value;
                        SettingsCategory settingCategory = (SettingsCategory) 
                            Enum.Parse(typeof(SettingsCategory), storeName);

                        XmlNode settingHelpNode = 
                            option.SelectSingleNode(@"HelpText");                            

                        m_optionsService.AddOption(optionName, settingCategory,
                            settingName);

                        if (settingHelpNode != null)
                        {
                            m_optionsService.SetHelpDescription(optionName,
                                settingHelpNode.InnerText);
                        }

                    }
                }
                XmlNodeList subList = node.SelectNodes("Category");
                if (subList != null)
                {
                    string subName = categoryName + ".";
                    BuildFromNodeList(subList, subName);
                }
            }
	    }
	}
}