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

public class smoothFollow : MonoBehaviour {


    public Transform target;

    public float zoomDamp = 2.0f;
    public float movementDamp = 2.0f;
    public TileSystem tilesystem;
    public float distance = 20.0f;
    // Use this for initialization
    void Start () {

    }

    // Update is called once per frame
    void FixedUpdate () {
        float fWidth = tilesystem.RowCount * (tilesystem.CellSize.x + tilesystem.CellSize.y);
        float fT = fWidth / Screen.width * Screen.height;
        fT = fT / (2.0f * Mathf.Tan (0.5f * Camera.main.fieldOfView * Mathf.Deg2Rad));
        float currentZoom = transform.position.z;
        Vector3 wantedPosition = target.position;
        Vector3 currentPosition = transform.position;

        GameObject[] GameObjects = FindObjectsOfType(typeof(GameObject)) as GameObject[];
        List<GameObject> countableGameobjects = new List<GameObject>();
        foreach (GameObject thisGameObject in GameObjects)
        {
            if (Vector3.Distance(thisGameObject.transform.position, target.transform.position) <= distance)
            {
                countableGameobjects.Add(thisGameObject);
            }
            else if (Vector3.Distance(thisGameObject.transform.position, target.transform.position) >= distance)
            {
                countableGameobjects.Remove(thisGameObject);
            }

        }
        float minHeight = float.MaxValue;
        float maxHeight = float.MinValue;
        foreach(GameObject thisGameObjectLow in countableGameobjects){
            if (thisGameObjectLow.transform.position.y < minHeight)
            {
                minHeight = thisGameObjectLow.transform.position.y;
            }
            if (thisGameObjectLow.transform.position.y > maxHeight)
            {
                maxHeight = thisGameObjectLow.transform.position.y;
            }
        }
        float wantedCameraZoom = ((Mathf.Abs(maxHeight) + Mathf.Abs(minHeight)) ) * -1;

        currentZoom = Mathf.Lerp (currentZoom, wantedCameraZoom, zoomDamp);
        currentPosition.x = Mathf.Lerp (currentPosition.x, wantedPosition.x, movementDamp);
        currentPosition.y = Mathf.Lerp (currentPosition.y, wantedPosition.y, movementDamp);
        transform.position = new Vector3(currentPosition.x, currentPosition.y,currentZoom);

    }


}