using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace mScriptableCS25;

internal class ScriptingCS : IDisposable
{
  SortedDictionary<string, string> scrInp1 = new(StringComparer.OrdinalIgnoreCase);
  SortedDictionary<string, string> scrInp2 = new(StringComparer.OrdinalIgnoreCase);    //This will have the STRIPUNPRINTABLES applied to it
  Dictionary<Guid, Dictionary<string, string>> dctCache = new();
  string scriptSource = string.Empty;
  string tempPath = Path.GetTempPath();
  Random rn = new();
  List<string> lstFilesToRemove = new();
  bool removedOldScripts = false;

  public void Dispose()
  {
    scrInp1.Clear();
    scrInp2.Clear();
    dctCache.Clear();
  }

  public bool HadErrors { get; internal set; } = false;
  public bool DebugMode { get; set; } = false;
  public bool AllowRemovalOfOldScripts { get; set; } = true;

  public string ScriptSource
  {
    get { return scriptSource; }
    set
    {
      scriptSource = CleanUserCode(value);
      dctCache.Clear();
    }
  }

  #region "Maint routines"
  string CleanUserCode(string ScriptCode)
  {
    var workCode = ScriptCode;
    Regex? re = null;
    //string inpVal_re = @"Function\s+inpVal\s*?\([^)]+\)(.*?)End\s+Function";
    //string iv_re = @"Function\s+iv\s*?\([^)]+\)(.*?)End\s+Function";
    //string return_re = @"Sub\s+return\s*?\([^)]+\)(.*?)End\s+Sub";
    string inpVal_re = @"string\s+inpVal\s*?\(\)(.*?)\{(?s:.*?)}";
    string iv_re = @"string\s+iv\s*?\(\)(.*?)\{(?s:.*?)}";
    string return_re = @"Sub\s+return\s*?\([^)]+\)(.*?)End\s+Sub";

    //remove conflicting "inpVal" functions
    re = new Regex(inpVal_re, RegexOptions.Singleline | RegexOptions.IgnoreCase);
    if (re.IsMatch(workCode))
      workCode = re.Replace(workCode, "");

    //remove conflicting "iv" functions
    re = new Regex(iv_re, RegexOptions.Singleline | RegexOptions.IgnoreCase);
    if (re.IsMatch(workCode))
      workCode = re.Replace(workCode, "");

    //remove conflicting "return" subroutine
    re = new Regex(return_re, RegexOptions.Singleline | RegexOptions.IgnoreCase);
    if (re.IsMatch(workCode))
      workCode = re.Replace(workCode, "");

    return workCode;
  }

  string StripUnprintables(string inp)
  {
    var rv = Regex.Replace(inp, "[^\x20-\x7E]", " ");
    rv = Regex.Replace(rv, "  +", " ").Trim();
    return rv;
  }

  Guid ToGuid(string strToHash)
  {
    var gx = Guid.Empty;
    using (var mD = System.Security.Cryptography.MD5.Create())
    {
      var stringBuilder = new StringBuilder();
      byte[] array = mD.ComputeHash(Encoding.UTF8.GetBytes(strToHash));
      for (int i = 0; i < array.Length; i++)
        stringBuilder.Append(array[i].ToString("X2"));

      gx = Guid.Parse(stringBuilder.ToString());
    }
    return gx;
  }

  #endregion

  #region "Models and Such"
  internal class MdlVbsSources : IDisposable
  {
    public void Dispose()
    {
      CacheDict.Clear();
    }

    public string CSScriptSource { get; set; } = string.Empty;
    public Dictionary<Guid, Dictionary<string, string>> CacheDict { get; set; } = new();
  }
  #endregion

}