//
// (C) Copyright 2003-2019 by Autodesk, Inc.
//
// Permission to use, copy, modify, and distribute this software in
// object code form for any purpose and without fee is hereby granted,
// provided that the above copyright notice appears in all copies and
// that both that copyright notice and the limited warranty and
// restricted rights notice below appear in all supporting
// documentation.
//
// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS.
// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. AUTODESK, INC.
// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
// UNINTERRUPTED OR ERROR FREE.
//
// Use, duplication, or disclosure by the U.S. Government is subject to
// restrictions set forth in FAR 52.227-19 (Commercial Computer
// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
// (Rights in Technical Data and Computer Software), as applicable.
//
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Autodesk.Revit.DB;
using Autodesk.Revit.DB.Plumbing;
using System.Xml.Linq;
using System.IO;
using System.Xml;
using System.Diagnostics;
using System.Xml.Schema;

namespace Revit.SDK.Samples.RoutingPreferenceTools.CS
{
    /// <summary>
    /// A helper class to find paths of .rfa family files in a document.
    /// </summary>
    internal class FindFolderUtility
    {
        /// <summary>
        /// Create an instance of the helper class
        /// </summary>
      public FindFolderUtility(Autodesk.Revit.ApplicationServices.Application application)
      {
         m_application = application;
         m_basePath = GetFamilyBasePath();
         List<string> extraFamilyPaths = FindFolderUtility.GetAdditionalFamilyPaths();
         m_Familyfiles = new Dictionary<string, string>();
         GetAllFiles(m_basePath, m_Familyfiles);
         //Get additional .rfa files in user-defined paths specified in familypaths.xml
         foreach (string extraPath in extraFamilyPaths)
         {
            GetAllFiles(extraPath, m_Familyfiles);
         }
      }

      /// <summary>
      /// Gets a list of paths defined in the familypaths.xml file in the RoutingPreferenceTools.dll folder.
      /// </summary>
      /// <returns>A list of paths containing .rfa files</returns>
      public static List<string> GetAdditionalFamilyPaths()
      {
         List<string> pathsList = new List<string>();	
          StreamReader reader = null;
         try
         {
            reader = new StreamReader(Directory.GetParent(System.Reflection.Assembly.GetExecutingAssembly().Location).FullName + "\\familypaths.xml");
         }
         catch (System.Exception)
         {
            return pathsList;
         }
         XDocument pathsDoc = XDocument.Load(new XmlTextReader(reader));
         IEnumerable<XElement> paths = pathsDoc.Root.Elements("FamilyPath");

         foreach (XElement xpath in paths)
            try
            {
               XAttribute xaPath = xpath.Attribute(XName.Get("pathname"));
               string familyPath = xaPath.Value;
               pathsList.Add(familyPath);
            }
            catch (Exception)
            {

            }
         reader.Close();
         return pathsList;
      }

        /// <summary>
        /// Returns the full path of an .rfa file in the "Data" directory of a Revit installation given an .rfa filename.
        /// </summary>
        /// <param name="filename">an .rfa filename without any path, e.g. "Generic elbow.rfa"</param>
        /// <returns>The full path to the .rfa file</returns>
        public string FindFileFolder(string filename)
        {
            string retval = "";
            try
            {
                retval = m_Familyfiles[filename];
            }
            catch (KeyNotFoundException)
            {
            }

            return retval;
        }

        private static void GetAllFiles(string basePath, Dictionary<string, string> allPaths)
        {
            if (!System.IO.Directory.Exists(basePath))
                return;
            string[] paths = (Directory.GetFiles(basePath, "*.rfa"));
            foreach (string path in paths)
            {
                string filename = System.IO.Path.GetFileName(path);
                allPaths[filename] = path;
            }

            string[] dirs = Directory.GetDirectories(basePath);
            foreach (string dir in dirs)
            {
                GetAllFiles(dir, allPaths);
            }


        }
        private string GetFamilyBasePath()
        {

            string basePath = "";
            try
            {
                basePath = m_application.GetLibraryPaths()["Imperial Library"];
                Debug.WriteLine(basePath);
                if (basePath.EndsWith(@"\"))
                {
                    basePath = basePath.Substring(0, basePath.Length - 1);
                }
                basePath = (System.IO.Directory.GetParent(basePath)).ToString();
                if (!(string.IsNullOrEmpty(basePath)))
                    return basePath;
            }
            catch (Exception)
            {

            }

            try
            {
                basePath = m_application.GetLibraryPaths().First().Value;
                if (basePath.EndsWith(@"\"))
                {
                    basePath = basePath.Substring(0, basePath.Length - 1);
                }
                basePath = System.IO.Directory.GetParent((System.IO.Directory.GetParent(basePath)).ToString()).ToString();
                if (!(string.IsNullOrEmpty(basePath)))
                    return basePath;
            }
            catch (Exception)
            {

            }

            try
            {
                string exe = System.Diagnostics.Process.GetCurrentProcess().MainModule.FileName;
                basePath = System.IO.Directory.GetParent(System.IO.Path.GetDirectoryName(exe)).ToString();
            }
            catch (Exception)
            {

            }

            return basePath;


        }
        private string m_basePath;
        private Dictionary<string, string> m_Familyfiles;
        private Autodesk.Revit.ApplicationServices.Application m_application;
    }


    /// <summary>
    /// A simple exception class to help identify errors related to this application.
    /// </summary>
    internal class RoutingPreferenceDataException : System.Exception
    {
        public RoutingPreferenceDataException(string message)
        {
            m_message = message;
        }
        public override string ToString()
        {
            return m_message;
        }
        private string m_message;
    }


    /// <summary>
    /// A helper class to validate RoutingPreferenceBuilder xml documents against
    /// the embedded resource "RoutingPreferenceBuilderData.xsd"
    /// </summary>
    internal class SchemaValidationHelper
    {

        /// <summary>
        /// Returns true if a document is a valid RoutingPreferenceBuilder xml document, false otherwise.
        /// </summary>
        public static bool ValidateRoutingPreferenceBuilderXml(XDocument doc, out string message)
        {
            message = "";
            XmlSchemaSet schemas = new XmlSchemaSet();
            schemas.Add("", XmlReader.Create(new StringReader(GetXmlSchema())));

            try
            {
                doc.Validate(schemas, null);
                return true;
            }
            catch (System.Xml.Schema.XmlSchemaValidationException ex)
            {
                message = ex.Message + ", " + ex.LineNumber + ", " + ex.LinePosition;
                return false;
            }
        }

        private static string GetXmlSchema()
        {
           //string[] names = System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceNames();
           Stream schemaStream = null;
           try
           {
              schemaStream = System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream("Revit.SDK.Samples.RoutingPreferenceTools.CS.RoutingPreferenceBuilder.RoutingPreferenceBuilderData.xsd");
           }
           catch (Exception)
           {
              throw new Exception("Could not find embedded xml RotingPreferenceBuilder schema resource.");
           }
           if (schemaStream == null)
           {
              throw new Exception("Could not find embedded xml RotingPreferenceBuilder schema resource.");
           }
           System.IO.StreamReader stReader = new StreamReader(schemaStream);
           return stReader.ReadToEnd();
        }
    }
}