using System;
using System.Collections.Generic;

namespace NHSE.Core
{
    public class MapManager : MapTerrainStructure
    {
        public readonly FieldItemManager Items;

        public int MapLayer { get; set; } // 0 or 1

        public MapManager(MainSave sav) : base(sav)
        {
            Items = new FieldItemManager(sav);
        }

        public FieldItemLayer CurrentLayer => MapLayer == 0 ? Items.Layer1 : Items.Layer2;

        public static void ClearDesignTiles(MainSave sav)
        {
            var tiles = sav.GetMapDesignTiles();
            for (int i = 0; i < tiles.Length; i++)
                tiles[i] = MainSave.MapDesignNone;
            sav.SetMapDesignTiles(tiles);
        }

        public static byte[] ExportDesignTiles(MainSave sav)
        {
            var tiles = sav.GetMapDesignTiles();
            var result = new byte[tiles.Length * 2];
            Buffer.BlockCopy(tiles, 0, result, 0, result.Length);
            return result;
        }

        public static void ImportDesignTiles(MainSave sav, byte[] result)
        {
            var tiles = sav.GetMapDesignTiles();
            Buffer.BlockCopy(result, 0, tiles, 0, result.Length);
            sav.SetMapDesignTiles(tiles);
        }
    }

    public class MapTerrainStructure
    {
        public readonly TerrainLayer Terrain;
        public readonly IReadOnlyList<Building> Buildings;

        public uint PlazaX { get; set; }
        public uint PlazaY { get; set; }

        public MapTerrainStructure(MainSave sav)
        {
            Terrain = new TerrainLayer(sav.GetTerrainTiles(), sav.GetAcreBytes());
            Buildings = sav.Buildings;
            PlazaX = sav.EventPlazaLeftUpX;
            PlazaY = sav.EventPlazaLeftUpZ;
        }
    }
}