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

namespace EmuXPortal.Api
{
    public class PlatformParser
    {
        private const string EMU_IGNORE_FILE = "emu_ignore.txt"; // if this file is present, that folder is ignored
        
        public PlatformParser(string path)
        {
            List<string> romdirs = GetRomDirectories(path);
            logger.WriteLine("Found {0} EMU Folders", romdirs.Count);
            this.Platforms = GetEMUConfigFiles(romdirs);
            this.Platforms.Sort();
        }

        public List<IEmuConfig> Platforms { get; private set; }

        private List<string> GetRomDirectories(string path)
        {
            logger.WriteLine("Searching for EMU Folders in: {0}", path);
            List<string> dirs = new List<string>();
            foreach (string dir in Directory.GetDirectories(path))
            {
                bool ignore = false;
                foreach (string file in Directory.GetFiles(dir))
                {
                    FileInfo fi = new FileInfo(file);
                    if (fi.Name.ToLower() == EMU_IGNORE_FILE)
                    {
                        logger.WriteLine("\tIgnoreing EMU Folder: {0}", dir);
                        ignore = true;
                        break;
                    }
                }
                if (!ignore)
                {
                    logger.WriteLine("\tAdding EMU Folder: {0}", dir);
                    dirs.Add(dir);
                }
            }
            return dirs;
        }

        private List<IEmuConfig> GetEMUConfigFiles(List<string> romdirs)
        {
            List<IEmuConfig> emuconfigs = new List<IEmuConfig>();
            logger.WriteLine("Reading EMU Config files");
            foreach (string dir in romdirs)
            {
                IEmuConfig emuconfig = null;
                emuconfig = EmuConfigLoader.Load(dir);
                emuconfigs.Add(emuconfig);
            }
            logger.WriteLine("Finished Reading EMU Config files");
            return emuconfigs;
        }

    }
}