using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace mmoRL
{
    public class Map
    {
        public static int MAP_WIDTH = 70;
        public static int MAP_HEIGHT = 15;

        public string id = "unknown";
        public Tile[,] tiles = new Tile[70, 15];
        public Object[,] objects = new Object[70, 15];
        public List<Item> items = new List<Item>();
        public List<Monster> monsters = new List<Monster>();
        public bool turnBased = false;
        public bool canDestroy = true;
        public bool canBuild = true;
        public string instanceOwner = "";

        public Map(byte[] serialized)
        {
            System.IO.BinaryReader br = new System.IO.BinaryReader(new System.IO.MemoryStream(serialized));

            //Version check
            byte b1 = br.ReadByte();
            byte b2 = br.ReadByte();
            byte b3 = 0x00; //Will be used later
            if (b1 != 0x00 || b2 != 0x09) throw new Exception("Map version mismatch!");

            //Map ID
            b1 = br.ReadByte();
            byte[] mapID = br.ReadBytes(b1);
            id = Encoding.ASCII.GetString(mapID);

            //Turnbased map
            if (br.ReadByte() == 0x01) { turnBased = true; } else { turnBased = false; }
            //Can destroy stuff on map
            if (br.ReadByte() == 0x01) { canDestroy = true; } else { canDestroy = false; }
            //Can build stuff on map
            if (br.ReadByte() == 0x01) { canBuild = true; } else { canBuild = false; }

            //Get instance owner
            int instanceOwnerLength = br.ReadByte();
            instanceOwner = Encoding.ASCII.GetString(br.ReadBytes(instanceOwnerLength));

            //Then fetch every tile in the map
            for (int iy = 0; iy < 15; iy++)
            {
                for (int ix = 0; ix < 70; ix++)
                {
                    b1 = br.ReadByte();
                    if (b1 != 0xFF)
                    {
                        tiles[ix, iy] = new Tile(b1);
                    }
                    else //Custom tile
                    {
                        b1 = br.ReadByte(); //Fetch length
                        tiles[ix, iy] = new Tile(br.ReadBytes(b1));
                    }
                }
            }

            //Then fetch every object in the map
            for (int iy = 0; iy < 15; iy++)
            {
                for (int ix = 0; ix < 70; ix++)
                {
                    b1 = br.ReadByte();
                    if (b1 != 0xFF)
                    {
                        objects[ix, iy] = new Object(b1);
                    }
                    else //Custom object
                    {
                        b1 = br.ReadByte(); //Fetch length
                        objects[ix, iy] = new Object(br.ReadBytes(b1));
                    }
                }
            }

            //Get number of items
            b1 = br.ReadByte();
            b2 = br.ReadByte();
            int numItems = b1 * 256 + b2;

            for (int i = 0; i < numItems; i++)
            {
                int x = br.ReadByte();
                int y = br.ReadByte();
                b1 = br.ReadByte();
                if (b1 != 0xFF)
                {
                    b2 = br.ReadByte();
                    b3 = br.ReadByte();
                    int itemID = b2 * 256 + b3;
                    Item toAdd = new Item(itemID, x, y);
                    items.Add(toAdd);
                    toAdd.amount = b1;
                }
                else
                {
                    b1 = br.ReadByte(); //Fetch length
                    Item item = new Item(br.ReadBytes(b1));
                    item.x = x;
                    item.y = y;
                    items.Add(item);

                }
            }

            //Get number of monsters
            int numMonsters = br.ReadByte();

            for (int i = 0; i < numMonsters; i++)
            {
                int x = br.ReadByte();
                int y = br.ReadByte();
                int monsterType = br.ReadByte();
                monsters.Add(new Monster(monsterType, x, y));
            }

            //Final confirmation, closing check
            b1 = br.ReadByte();
            if (b1 != 0xFF) throw new Exception("Invalid endpoint for map data.");

            br.Close();
        }

        public void RemoveItem(int x, int y, int itemID)
        {
            Item toRemove = null;

            for (int i = 0; i < MainClass.map.items.Count; i++)
            {
                if (MainClass.map.items[i].id == itemID)
                {
                    if (MainClass.map.items[i].x == x && MainClass.map.items[i].y == y)
                    {
                        toRemove = MainClass.map.items[i];
                    }
                }
            }

            if (toRemove != null) MainClass.map.items.Remove(toRemove);
        }

        public void KillMonster(Monster monster)
        {
            monsters.Remove(monster);

            if (monsters.Count == 0) this.turnBased = false;
        }
    }
}