using UnityEngine;
using System.Linq;
using NUnit.Framework;
using System.Collections.Generic;

public class Unit
{
	public string Name = "Player";
	public int HitPoints = 2;
	public Powerup powerup = new Powerup ();


	public Hex Hex { get; protected set; }

	public delegate void UnitMovedDelegate (Hex oldHex, Hex newHex);

	public event UnitMovedDelegate OnUnitMoved;

	public void Destroy (Hex h)
	{
		h.RemoveUnit (this);
		h.HexMap.score.CurrentScore++;;
	}

	public bool SetHex (Hex newHex)
	{
		Hex oldHex = Hex;
		if (oldHex != null) {
			if (newHex.Active && Vector3.Distance (oldHex.Position (), newHex.Position ()) < 2f) {
				if (newHex.Units ().Count (x => x.Name == "Enemy") == 0) {
					if (Hex != null) {
						Hex.RemoveUnit (this);
					}

					Hex = newHex;

					Hex.AddUnit (this);



					if (OnUnitMoved != null) {
						OnUnitMoved (oldHex, newHex);
					}
				} else {
					Unit enemy = newHex.Units ().FirstOrDefault ();
					enemy.Destroy (newHex);
					GameObject.Destroy (newHex.HexMap.GetUnitGO (enemy));
					return true;
				}
				return false;
			}
			return true;
		} else {
			if (Hex != null) {
				Hex.RemoveUnit (this);
			}

			Hex = newHex;

			Hex.AddUnit (this);



			if (OnUnitMoved != null) {
				OnUnitMoved (oldHex, newHex);
			}
		}
		return false;
	}

	public void DoTurn (Hex newHex)
	{
		if (SetHex (newHex))
			return;

		if ((newHex.HexMap.Units.Count (x => x.Name == "Enemy") == 0)) {
			System.Collections.Generic.List<Hex> activeHexes = new System.Collections.Generic.List<Hex> ();
			foreach (Hex hex in newHex.HexMap.Hexes) {
				if (hex.Active) {
					activeHexes.Add (hex);
				}
			}

			System.Random rand = new System.Random ();
			Hex h;
			do {
				h = (activeHexes.ToArray ()) [rand.Next (0, activeHexes.Count)];
			} while(h.Units ().Count () != 0);
			newHex.HexMap.SpawnUnitAt (new Unit () { Name = "Enemy" }, newHex.HexMap.EnemyPrefab, h.Q, h.R);
		}


	}
}