using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using ContainerShip.MovementStrategy;
using ContainerShip.DrawningObjects;
using ContainerShip.Entities;

namespace ContainerShip.Generic
{
    internal class ShipsGenericStorage
    {
        private static readonly char _separatorForKeyValue = '|';
        private readonly char _separatorRecords = ';';
        private static readonly char _separatorForObject = ':';
        readonly Dictionary<string, ShipsGenericCollection<DrawningShip, DrawingObjectShip>> _shipStorages;
        public List<string> Keys => _shipStorages.Keys.ToList();
        private readonly int _pictureWidth;

        private readonly int _pictureHeight;
        public ShipsGenericStorage(int pictureWidth, int pictureHeight)
        {
            _shipStorages = new Dictionary<string,
            ShipsGenericCollection<DrawningShip, DrawingObjectShip>>();
            _pictureWidth = pictureWidth;
            _pictureHeight = pictureHeight;
        }
        public void AddSet(string name)
        {
            foreach (string nameStorage in Keys)
            {
                if (nameStorage == name)
                {
                    MessageBox.Show("Набор с заданным именем уже существует", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    return;
                }
            }
            _shipStorages.Add(name, new ShipsGenericCollection<DrawningShip, DrawingObjectShip>(_pictureWidth, _pictureHeight));
        }

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

        }
        public bool SaveData(string filename)
        {
            if (_shipStorages.Count == 0)
            {
                throw new InvalidOperationException("Невалидная операция, нет данных для сохранения");
            }

            if (File.Exists(filename))
            {
                File.Delete(filename);
            }

            using (StreamWriter sw = File.CreateText(filename))
            {
                sw.WriteLine($"ShipStorage");

                foreach (var record in _shipStorages)
                {
                    StringBuilder records = new();

                    if (record.Value.count <= 0)
                    {
                        throw new InvalidOperationException("Невалидная операция, нет данных для сохранения");
                    }
                    foreach (DrawningShip? elem in record.Value.GetShip)
                    {
                        records.Append($"{elem?.GetDataForSave(_separatorForObject)}{_separatorRecords}");
                    }
                    sw.WriteLine($"{record.Key}{_separatorForKeyValue}{records}");
                }
            }
            return true;
        }
        public bool LoadData(string filename)
        {
            if (!File.Exists(filename))
            {
                throw new FileNotFoundException($"Файл {filename} не найден");
            }

            using (StreamReader sr = File.OpenText(filename))
            {
                string? curLine = sr.ReadLine();
                if (curLine == null || curLine.Length == 0 || !curLine.StartsWith("ShipStorage"))
                {
                    throw new ArgumentException("Неверный формат данных");
                }
                _shipStorages.Clear();

                curLine = sr.ReadLine();
                if (curLine == null || curLine.Length == 0)
                {
                    throw new ArgumentException("Нет данных");
                }
                while (curLine != null)
                {
                    if (!curLine.Contains(_separatorRecords))
                    {
                        throw new ArgumentException("Коллекция пуста");
                    }

                    string[] record = curLine.Split(_separatorForKeyValue, StringSplitOptions.RemoveEmptyEntries);

                    ShipsGenericCollection<DrawningShip, DrawingObjectShip> collection = new(_pictureWidth, _pictureHeight);

                    string[] set = record[1].Split(_separatorRecords, StringSplitOptions.RemoveEmptyEntries);

                    foreach (string elem in set)
                    {
                        DrawningShip? ship = elem?.CreateDrawningShip(_separatorForObject, _pictureWidth, _pictureHeight);
                        if (ship != null)
                        {
                            if (collection + ship == -1)
                            {
                                throw new InvalidOperationException("Невалидная операция, ошибка добавления в коллекцию");
                            }
                        }
                    }
                    _shipStorages.Add(record[0], collection);
                    curLine = sr.ReadLine();
                }
            }
            return true;
        }
        public ShipsGenericCollection<DrawningShip, DrawingObjectShip>? this[string ind]
        {
            get
            {
                if (_shipStorages.ContainsKey(ind))
                {
                    return _shipStorages[ind];
                }
                return null;
            }
        }

    }
}