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

namespace Sailboat
{
    internal class MapsCollection
    {
        readonly Dictionary<string, MapWithSetBoatsGeneric<IDrawingObject, AbstractMap>> _mapStorages;

        public List<string> Keys => _mapStorages.Keys.ToList();

        private readonly int _pictureWidth;

        private readonly int _pictureHeight;

        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;
        }

        public void AddMap(string name, AbstractMap map)
        {
            if (Keys.Contains(name)) return;
            _mapStorages.Add(name, new MapWithSetBoatsGeneric<IDrawingObject, AbstractMap>(_pictureWidth, _pictureHeight, map));
        }

        public void DelMap(string name)
        {
            _mapStorages.Remove(name);
        }

        public MapWithSetBoatsGeneric<IDrawingObject, AbstractMap> this[string ind]
        {
            get
            {
                _mapStorages.TryGetValue(ind, out var result);
                return result;
            }
        }

        /// <summary>
        /// Сохранение информации по автомобилям в хранилище в файл
        /// </summary>
        /// <param name="filename">Путь и имя файла</param>
        /// <returns></returns>
        public void SaveData(string filename)
        {
            if (File.Exists(filename))
            {
                File.Delete(filename);
            }
            using (StreamWriter sw = new(filename))
            {
                sw.Write($"MapsCollection{Environment.NewLine}");
                foreach (var storage in _mapStorages)
                {
                    sw.Write($"{storage.Key}{separatorDict}{storage.Value.GetData(separatorDict, separatorData)}{Environment.NewLine}");
                }
            }
        }

        /// <summary>
        /// Загрузка нформации по автомобилям на парковках из файла
        /// </summary>
        /// <param name="filename"></param>
        /// <returns></returns>
        public void LoadData(string filename)
        {
            if (!File.Exists(filename))
            {
                throw new FileNotFoundException("Файл не найден");
            }
            using (StreamReader sr = new(filename))
            {
                string str = "";
                if ((str = sr.ReadLine()) == null || !str.Contains("MapsCollection"))
                {
                    throw new FileFormatException("Формат данных в файле не правильный");
                }
                _mapStorages.Clear();
                while ((str = sr.ReadLine()) != null)
                {
                    var tempElem = str.Split(separatorDict);
                    AbstractMap map = null;
                    switch (tempElem[1])
                    {
                        case "SimpleMap":
                            map = new SimpleMap();
                            break;
                        case "WaterMap":
                            map = new WaterMap();
                            break;
                    }
                    _mapStorages.Add(tempElem[0], new MapWithSetBoatsGeneric<IDrawingObject, AbstractMap>(_pictureWidth, _pictureHeight, map));
                    _mapStorages[tempElem[0]].LoadData(tempElem[2].Split(separatorData, StringSplitOptions.RemoveEmptyEntries));
                }
            }
        }
    }
}