using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using DoubleDeckerbus.Drawing;
using DoubleDeckerbus.Move_Strategy;

namespace DoubleDeckerbus.Generic
{
    internal class BusesGenericStorage
    {
        readonly Dictionary<string, BusGenericCollection<DrawingBus, DrawingObjectBus>> _busStorages;
        public List<string> Keys => _busStorages.Keys.ToList();
        private readonly int _pictureWidth;
        private readonly int _pictureHeight;
        private static readonly char _separatorForKeyValue = '|';
        private readonly char _separatorRecords = ';';
        private static readonly char _separatorForObject = ':';

        public BusesGenericStorage(int pictureWidth, int pictureHeight)
        {
            _busStorages = new Dictionary<string, BusGenericCollection<DrawingBus, DrawingObjectBus>>();
            _pictureWidth = pictureWidth;
            _pictureHeight = pictureHeight;
        }

        public void AddSet(string name)
        {
            foreach (string nameStorage in Keys)
            {
                if (nameStorage == name)
                {
                    MessageBox.Show("Набор с заданным именем уже есть", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    return;
                }
            }
            _busStorages.Add(name, new BusGenericCollection<DrawingBus, DrawingObjectBus>(_pictureWidth, _pictureHeight));
        }

        public void DelSet(string name)
        {
            if (_busStorages.ContainsKey(name))
            {
                _busStorages.Remove(name);
            }

        }
        public BusGenericCollection<DrawingBus, DrawingObjectBus>? this[string ind]
        {
            get
            {
                if (_busStorages.ContainsKey(ind))
                {
                    return _busStorages[ind];
                }
                return null;
            }
        }

        public bool SaveData(string filename)
        {
            if (File.Exists(filename))
            {
                File.Delete(filename);
            }

            using (StreamWriter sw = File.CreateText(filename))
            {
                sw.WriteLine($"DoubleDeckerBusStorage");
                foreach (var record in _busStorages)
                {
                    StringBuilder records = new();
                    foreach (DrawingBus? elem in record.Value.GetBus)
                    {
                        records.Append($"{elem?.GetDataForSave(_separatorForObject)}{_separatorRecords}");
                    }
                    sw.WriteLine($"{record.Key}{_separatorForKeyValue}{records}");
                }
            }

            return true;
        }

        public bool LoadData(string filename)
        {
            if (!File.Exists(filename))
            {
                return false;
            }
            
            using (StreamReader sr = File.OpenText(filename))
            {
                string? curLine = sr.ReadLine();
                if (curLine == null || !curLine.Contains("AirbusStorage"))
                {
                    return false;
                }
                _busStorages.Clear();
                curLine = sr.ReadLine();
                while (curLine != null)
                {
                    string[] record = curLine.Split(_separatorForKeyValue, StringSplitOptions.RemoveEmptyEntries);
                    BusGenericCollection<DrawingBus, DrawingObjectBus> collection = new(_pictureWidth, _pictureHeight);
                    string[] set = record[1].Split(_separatorRecords, StringSplitOptions.RemoveEmptyEntries);

                    foreach (string elem in set)
                    {
                        DrawingBus? Bus = elem?.CreateDrawingBus(_separatorForObject, _pictureWidth, _pictureHeight);
                        if (Bus != null)
                        {
                            if (collection + Bus == -1)
                            {
                                return false;
                            }
                        }
                    }
                    _busStorages.Add(record[0], collection);
                    curLine = sr.ReadLine();
                }
            }
            return true;
        }
    }
}