using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Catamaran
{
    internal class MapsCollection
    {
        /// <summary>
        /// Словарь (хранилище) с картами
        /// </summary>
        readonly Dictionary<string, MapWithSetBoatsGeneric<IDrawingObject, AbstractMap>> _mapStorages;

        /// <summary>
        /// Возвращение списка названий карт
        /// </summary>
        public List<string> Keys => _mapStorages.Keys.ToList();
        /// <summary>
        /// Ширина окна отрисовки
        /// </summary>
        private readonly int _pictureWidth;
        /// <summary>
        /// Высота окна отрисовки
        /// </summary>
        private readonly int _pictureHeight;
        /// <summary>
        /// Конструктор
        /// </summary>
        /// <param name="pictureWidth"></param>
        /// <param name="pictureHeight"></param>
        /// 
        private readonly char separatorDict = '|';

        private readonly char separatorData = ';';
        public MapsCollection(int pictureWidth, int pictureHeight)
        {
            _mapStorages = new Dictionary<string, MapWithSetBoatsGeneric<IDrawingObject, AbstractMap>>();
            _pictureWidth = pictureWidth;
            _pictureHeight = pictureHeight;
        }
        /// <summary>
        /// Добавление карты
        /// </summary>
        /// <param name="name">Название карты</param>
        /// <param name="map">Карта</param>
        public void AddMap(string name, AbstractMap map)
        {
            if (!_mapStorages.ContainsKey(name))
            {
                _mapStorages.Add(name, new MapWithSetBoatsGeneric<IDrawingObject, AbstractMap>(_pictureWidth, _pictureHeight, map));
            }
        }
        /// <summary>
        /// Удаление карты
        /// </summary>
        /// <param name="name">Название карты</param>
        public void DelMap(string name)
        {
            _mapStorages.Remove(name);
        }
        /// <summary>
        /// Доступ к парковке
        /// </summary>
        /// <param name="ind"></param>
        /// <returns></returns>
        public MapWithSetBoatsGeneric<IDrawingObject, AbstractMap> this[string ind]
        {
            get
            {
                _mapStorages.TryGetValue(ind, out var map);
                return map;
            }
        }

        /// <summary>
        /// Метод записи информации в файл
        /// </summary>
        /// <param name="text">Строка, которую следует записать</param>
        /// <param name="stream">Поток для записи</param>
       
        public void SaveData(string filename)
        {
            if (File.Exists(filename))
            {
                File.Delete(filename);
            }
            using (StreamWriter sw = new StreamWriter(filename))
            {
                sw.WriteLine("MapsCollection");
                foreach (var storage in _mapStorages)
                {

                    sw.WriteLine($"{storage.Key}{separatorDict}{storage.Value.GetData(separatorDict, separatorData)}");
                }
            }
        }

        /// <summary>
        /// Загрузка нформации про лодки в гавани из файла
        /// </summary>
        /// <param name="filename"></param>
        /// <returns></returns>

        public void LoadData(string filename)
        {
            if (!File.Exists(filename))
            {
                throw new FileNotFoundException(filename);

            }
            using (StreamReader sr = new StreamReader(filename))
            {
                string str = "";
                if ((str = sr.ReadLine()) == null || !str.Contains("MapsCollection"))
                {
                    //если нет такой записи, то это не те данные
                    throw new FormatException(str);
                }
                //очищаем записи
                _mapStorages.Clear();
                while ((str = sr.ReadLine()) != null)
                {
                    var elem = str.Split(separatorDict);
                    AbstractMap map = null;
                    switch (elem[1])
                    {
                        case "SimpleMap":
                            map = new SimpleMap();
                            break;
                        case "SecondMap":
                            map = new SecondMap();
                            break;
                    }
                    _mapStorages.Add(elem[0], new MapWithSetBoatsGeneric<IDrawingObject, AbstractMap>(_pictureWidth, _pictureHeight, map));
                    _mapStorages[elem[0]].LoadData(elem[2].Split(separatorData, (char)StringSplitOptions.RemoveEmptyEntries));
                }
            }
        }
    }
}