using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;

namespace CarFire
{
    class GameLogic
    {
        Game mGame;
        public GameLogic(Game game)
        {
            mGame = game;
        }
        public void Update(TimeSpan timespan, int thisPlayer)
        {
            //Handle projectiles - update and check for wall collisions
            for (int i = 0; i < mGame.State.mProjectiles.Count; i++)
            {
                bool removed = false;
                if (!mGame.State.Map.IsCellOpen(new Point(mGame.State.mProjectiles[i].Coordinates.X, mGame.State.mProjectiles[i].Coordinates.Y)))
                {

                    mGame.State.mProjectiles.RemoveAt(i);
                    removed = true;
                    i--;
                }
                if (!removed)
                    mGame.State.mProjectiles[i].Update(timespan);

            }
            //Check for collisons
            for (int j = 0; j < mGame.State.mCharacters.Length; j++)
            {

                if (mGame.State.mCharacters[j] != null)
                    for (int i = 0; i < mGame.State.mProjectiles.Count; i++)
                    {
                        if (mGame.State.mProjectiles[i].Coordinates.X == mGame.State.mCharacters[j].Coordinates.X && mGame.State.mProjectiles[i].Coordinates.Y == mGame.State.mCharacters[j].Coordinates.Y)
                        {
                            mGame.State.mCharacters[j].causeDamageTo(mGame.State.mProjectiles[i].Damage);
                            Console.WriteLine(mGame.State.mCharacters[j].Health);
                            mGame.State.mProjectiles.RemoveAt(i);
                            i--;
                        }
                    }
            }
            //Update input for each player
            for (int i = 0; i < mGame.State.NumberOfPlayers; i++)
            {
                //If player has not selected a player yet let them select one.
                if (mGame.State.mCharacters[i] == null)
                {
                    if (mGame.State.GetKeysDown(i).Contains(Keys.Enter))
                    {
                        //mCharacters[i] = new Human(mGame, "", everything, projectile1, this, mGame.State.Map.GetStartingPositionForPlayer(i + 1));
                    }
                }
                //Regular player input updates
                else
                {

                    mGame.State.mCharacters[i].UpdateInput(timespan, mGame.State.GetKeysDown(i));

                }
            }
            if (mGame.State.mCharacters[thisPlayer] != null)
            {
                mGame.State.Map.CenterCell = mGame.State.mCharacters[thisPlayer].Position;
            }
            //Handle wall collisions of projectiles again...
            for (int i = 0; i < mGame.State.mProjectiles.Count; i++)
            {
                if (!mGame.State.Map.IsCellOpen(new Point(mGame.State.mProjectiles[i].Coordinates.X, mGame.State.mProjectiles[i].Coordinates.Y)))
                {
                    mGame.State.mProjectiles.RemoveAt(i);
                    i--;
                }

            }
        }
    }
}