using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;
using System.IO;

namespace n5coredll
{
    class N5PropertyOper : System.Collections.Hashtable {
        private string fileName = "";
        private ArrayList list = new ArrayList();
        public ArrayList List {
            get { return list; }
            set { list = value; }
        }
        public N5PropertyOper(string fileName) {
            this.fileName = fileName;
            this.Load(fileName);
        }

        public override void Add(object key, object value) {
            base.Add(key, value);
            list.Add(key);

        }

        public override ICollection Keys {
            get {
                return list;
            }
        }

        private void Load(string filePath) {
            char[] convertBuf = new char[1024];
            int limit;
            int keyLen;
            int valueStart;
            char c;
            string bufLine = string.Empty;
            bool hasSep;
            bool precedingBackslash;
            using (StreamReader sr = new StreamReader(filePath)) {
                while (sr.Peek() >= 0) {
                    bufLine = sr.ReadLine();
                    limit = bufLine.Length;
                    keyLen = 0;
                    valueStart = limit;
                    hasSep = false;
                    precedingBackslash = false;
                    if (bufLine.StartsWith("#"))
                        keyLen = bufLine.Length;
                    while (keyLen < limit) {
                        c = bufLine[keyLen];
                        if ((c == '=' || c == ':') & !precedingBackslash) {
                            valueStart = keyLen + 1;
                            hasSep = true;
                            break;
                        }
                        else if ((c == ' ' || c == '\t' || c == '\f') & !precedingBackslash) {
                            valueStart = keyLen + 1;
                            break;
                        }
                        if (c == '\\') {
                            precedingBackslash = !precedingBackslash;
                        }
                        else {
                            precedingBackslash = false;
                        }
                        keyLen++;
                    }
                    while (valueStart < limit) {
                        c = bufLine[valueStart];
                        if (c != ' ' && c != '\t' && c != '\f') {
                            if (!hasSep && (c == '=' || c == ':')) {
                                hasSep = true;
                            }
                            else {
                                break;
                            }
                        }
                        valueStart++;
                    }
                    string key = bufLine.Substring(0, keyLen);
                    string values = bufLine.Substring(valueStart, limit - valueStart);
                    if (key == "")
                        key += "#";
                    while (key.StartsWith("#") & this.Contains(key)) {
                        key += "#";
                    }
                    this.Add(key, values);
                }
            }
        }
    }
}