using ProjectLainer.DrawningObjects;
using ProjectLainer.MovementStrategy;
namespace ProjectLainer.Generics
{
    internal class LainersGenericStorage
    {
        
        readonly Dictionary<string, LainersGenericCollection<DrawingEntity, DrawningObjectLainer>> _lainerStorages;
        
        public List<string> Keys => _lainerStorages.Keys.ToList();
        
        private readonly int _pictureWidth;
       
        private readonly int _pictureHeight;
        public LainersGenericStorage(int pictureWidth, int pictureHeight)
        {
            _lainerStorages = new Dictionary<string, LainersGenericCollection<DrawingEntity, DrawningObjectLainer>>();
            _pictureWidth = pictureWidth;
            _pictureHeight = pictureHeight;
        }
        
        public void AddSet(string name)
        {
            _lainerStorages.Add(name, new LainersGenericCollection<DrawingEntity, DrawningObjectLainer>(_pictureWidth, _pictureHeight));
        }
        
        public void DelSet(string name)
        {
            if (!_lainerStorages.ContainsKey(name))
            {
                return;
            }

            _lainerStorages.Remove(name);
        }
        
        public LainersGenericCollection<DrawingEntity, DrawningObjectLainer>? this[string ind]
        {
            get
            {
                if (_lainerStorages.ContainsKey(ind))
                {
                    return _lainerStorages[ind];
                }
                return null;
            }
        }
        private static readonly char _separatorForKeyValue = '|';
        private readonly char _separatorRecords = ';';
        private static readonly char _separatorForObject = ':';
        public bool SaveData(string filename)
        {

            if (File.Exists(filename))
            {
                File.Delete(filename);
            }
            StringBuilder data = new();
            foreach (KeyValuePair<string, LainersGenericCollection<DrawingLainer, DrawningObjectLainer>> record in _lainerStorages)
            {
                StringBuilder records = new();
                foreach (DrawingLainer? elem in record.Value.GetLainers)
                {
                    records.Append($"{elem?.GetDataForSave(_separatorForObject)}{_separatorRecords}");
                }
                data.AppendLine($"{record.Key}{_separatorForKeyValue}{records}");
            }
            if (data.Length == 0)
            {
                return false;
            }
            using (StreamWriter sw = new(filename))
            {
                sw.WriteLine($"LainerStorage{Environment.NewLine}{data}");
            }
            return true;
        }
        public bool LoadData(string filename)
        {
            if (!File.Exists(filename))
            {
                return false;
            }
            using (StreamReader sr = new(filename))
            {
                string str = sr.ReadLine();
                var strs = str.Split(new char[] { '\n', '\r' }, StringSplitOptions.RemoveEmptyEntries);
                if (strs == null || strs.Length == 0)
                {
                    return false;
                }
                if (!strs[0].StartsWith("LainerStorage"))
                {
                    return false;
                }
                _lainerStorages.Clear();
                do
                {
                    string[] record = str.Split(_separatorForKeyValue, StringSplitOptions.RemoveEmptyEntries);
                    if (record.Length != 1)
                    {
                        str = sr.ReadLine();
                        continue;
                    }
                    LainersGenericCollection<DrawingLainer, DrawningObjectLainer> collection = new(_pictureWidth, _pictureHeight);
                    string[] set = record[1].Split(_separatorRecords, StringSplitOptions.RemoveEmptyEntries);
                    foreach (string elem in set)
                    {
                        DrawingLainer? lainer = elem?.CreateDrawningLainer(_separatorForObject, _pictureWidth, _pictureHeight);
                        if (lainer != null)
                        {
                            if (!(collection + lainer))
                            {
                                return false;
                            }
                        }
                    }
                    _lainerStorages.Add(record[0], collection);
                    str = sr.ReadLine();
                } while (str != null);
            }
            return true;
        }
    }
}