﻿using System.Collections.Generic;
using System.IO;

namespace FSO.Files
{
    public class IniFile : Dictionary<string, IniSection>
    {
        public static IniFile Read(string path){
            using (var stream = new FileStream(path, FileMode.Open, FileAccess.Read)){
                var result = new IniFile();
                result.Decode(stream);
                return result;
            }
        }


        public void Decode(Stream stream)
        {
            IniSection currentSection = null;

            using (var reader = new StreamReader(stream)){
                string line = null;

                while((line = reader.ReadLine()) != null){
                    line = line.TrimStart();

                    if (line.StartsWith(";")){
                        //Comment
                    }else if (line.StartsWith("[")){
                        //Section
                        currentSection = new IniSection();
                        currentSection.Name = line.Substring(1);
                        currentSection.Name = currentSection.Name.Substring(0, currentSection.Name.LastIndexOf("]"));
                        this.Add(currentSection.Name, currentSection);
                    }
                    else
                    {
                        //Could be a key / value
                        var split = line.IndexOf("=");
                        if(split != -1 && currentSection != null && split+1 < line.Length){
                            var key = line.Substring(0, split).Trim();
                            var value = line.Substring(split + 1).TrimStart();

                            if(key.Length > 0)
                            {
                                currentSection[key] = value;
                            }
                        }
                    }
                }
            }
        }
    }

    public class IniSection : Dictionary<string, string>
    {
        public string Name { get; set; }
    }
}
