using Hydroplane.DrawningObjects;
using Hydroplane.MovementStrategy;
using Hydroplane.Exceptions;
using System;
using System.Collections.Generic;
using System.DirectoryServices.ActiveDirectory;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Hydroplane.Generics
{
    internal class PlanesGenericStorage
    {
        readonly Dictionary<string, PlanesGenericCollection<DrawningPlane, DrawningObjectPlane>> _planeStorages;
        public List<string> Keys => _planeStorages.Keys.ToList();
        private readonly int _pictureWidth;
        private readonly int _pictureHeight;
        public PlanesGenericStorage(int pictureWidth, int pictureHeight)
        {
            _planeStorages = new Dictionary<string, PlanesGenericCollection<DrawningPlane, DrawningObjectPlane>>();
            _pictureWidth = pictureWidth;
            _pictureHeight = pictureHeight;
        }
        public void AddSet(string name)
        {
            if (_planeStorages.ContainsKey(name)) return;
            _planeStorages[name] = new PlanesGenericCollection<DrawningPlane, DrawningObjectPlane>(_pictureWidth, _pictureHeight);
        }

        public void DelSet(string name)
        {
            if (!_planeStorages.ContainsKey(name)) return;
            _planeStorages.Remove(name);
        }

        public PlanesGenericCollection<DrawningPlane, DrawningObjectPlane>?
        this[string ind]
        {
            get
            {
                if (_planeStorages.ContainsKey(ind)) return _planeStorages[ind];
                return null;
            }
        }

        private static readonly char _separatorForKeyValue = '|';
        private readonly char _separatorRecords = ';';
        private static readonly char _separatorForObject = ':';

        public void SaveData(string filename)
        {
            if (File.Exists(filename))
            {
                File.Delete(filename);
            }
            StringBuilder data = new();
            foreach (KeyValuePair<string, PlanesGenericCollection<DrawningPlane, DrawningObjectPlane>> record in _planeStorages)
            {
                StringBuilder records = new();
                foreach (DrawningPlane? elem in record.Value.GetPlanes)
                {
                    records.Append($"{elem?.GetDataForSave(_separatorForObject)}{_separatorRecords}");
                }
                data.AppendLine($"{record.Key}{_separatorForKeyValue}{records}");
            }
            if (data.Length == 0)
            {
                throw new ArgumentException("Invalid operation, there isn't any data");
            }
            using (StreamWriter writer = new StreamWriter(filename))
            {
                writer.Write($"PlaneStorage{Environment.NewLine}{data}");
            }
        }

        public void LoadData(string filename)
        {
            if (!File.Exists(filename))
            {
                throw new FileNotFoundException("File not found");
            }

            using (StreamReader fs = File.OpenText(filename))
            {
                string str = fs.ReadLine();
                if (str == null || str.Length == 0)
                {
                    throw new ArgumentException("There isn't any data for load");
                }
                if (!str.StartsWith("PlaneStorage"))
                {
                    throw new InvalidDataException("Invalid format of data");
                }

                _planeStorages.Clear();
                string strs = "";

                while ((strs = fs.ReadLine()) != null)
                {
                    if (strs == null)
                    {
                        return;
                    }

                    string[] record = strs.Split(_separatorForKeyValue, StringSplitOptions.RemoveEmptyEntries);
                    if (record.Length != 2)
                    {
                        continue;
                    }
                    PlanesGenericCollection<DrawningPlane, DrawningObjectPlane> collection = new(_pictureWidth, _pictureHeight);
                    string[] set = record[1].Split(_separatorRecords, StringSplitOptions.RemoveEmptyEntries);
                    foreach (string elem in set)
                    {
                        DrawningPlane? plane = elem?.CreateDrawningPlane(_separatorForObject, _pictureWidth, _pictureHeight);
                        if (plane != null)
                        {
                            if (!(collection + plane))
                            {
                                try
                                {
                                    _ = collection + plane;
                                }
                                catch (PlaneNotFoundException e)
                                {
                                    throw e;
                                }
                                catch (StorageOverflowException e)
                                {
                                    throw e;
                                }
                            }
                        }
                    }
                    _planeStorages.Add(record[0], collection);
                }
            }
        }        
    }
}