using System.Text.RegularExpressions;

namespace KumiScript.Loader
{
    public class KSMetaParser
    {
        readonly string _path;
        readonly StreamReader _streamReader;
        readonly Dictionary<string, int> _properties;
        public KSMetaParser(string path)
        {
            _path = path;
            _streamReader = new StreamReader(File.OpenRead(path));
            _properties = new Dictionary<string, int>(8);
            ParseFile();
        }

        private void ParseFile()
        {
            while (!_streamReader.EndOfStream)
            {
                string? line = _streamReader.ReadLine();
                if (line is null)
                    continue;
                
                line = Regex.Replace(line, "\\s+", string.Empty);
                string[] kvp = line.Split(":", 2);
                int v;
                if (!int.TryParse(kvp[1], out v))
                    throw new Exception("Bad file!");
                
                _properties.Add(kvp[0], v);
            }
        }

        public int GetAttribute(string name)
        {
            int v = 0;
            _properties.TryGetValue(name, out v);
            return v;
        }
    }
}