using UnityEngine;
using System.Collections;

public class DK_MapSystem : MonoBehaviour {
    public float ScrollSpeed = 20.0f;
    public float ZoomSpeed = 10.0f;
    public float RotateSpeed = 5.0f;
    public float Scroll_Width = 10.0f;

    public int CameraHeight = 60;

    private GameObject[][] ShiftMap = new GameObject[50][];

    private Vector2 TileSize;
    private Mesh SingleTile;

    private GameObject MapHolder;

    private Vector3 mousePos;
    private Vector3 mouserayPos;
    private Vector3 camangle;
    private Vector3 rayget;

    private Vector3 Tempv = new Vector3(0,0,0);
    private Vector2 scroller;

    private Ray mouseray;
    private Ray ray;
    private RaycastHit hit;

    private float hitdistance;
    private float zoomer;
    private float camX, camY;

    DK_Tiles DKTiles;
    DK_TileSystem DK_TileOption;

    // Use this for initialization
    void Start () {
        for(int ax=0; ax<50; ax++){
            ShiftMap[ax] = new GameObject[40];
        }
        DKTiles = transform.gameObject.GetComponent<DK_Tiles>();

        SingleTile = DKTiles.MapPrefabs[0].GetComponent<MeshFilter>().sharedMesh;
        TileSize = new Vector2(SingleTile.bounds.size.x, SingleTile.bounds.size.z);
        for(int ax=0; ax<50; ax++){
            for(int ay=0; ay<40; ay++){
                ShiftMap[ax][ay] = Instantiate(DKTiles.MapPrefabs[0], new Vector3(ax*TileSize.x, 0, ay*TileSize.y), Quaternion.identity) as GameObject;
                ShiftMap[ax][ay].transform.name = "Position: " + ax + " | " + ay;
                DK_TileOption = ShiftMap[ax][ay].GetComponent<DK_TileSystem>();
                DK_TileOption.Tile_Position = new Vector2(ax, ay);
                DK_TileOption.Tile_ID = 1;
            }
        }

        MapHolder = new GameObject();
        MapHolder.transform.name = "TilemapHolder";

        for(int ax=0; ax<50; ax++){
            for(int ay=0; ay<40; ay++){
                ShiftMap[ax][ay].transform.parent = MapHolder.transform;
            }
        }

        DKTiles.TheCamera.transform.position = new Vector3(0, CameraHeight, -34);
        DKTiles.TheCamera.transform.eulerAngles = new Vector3(50.000f, 0.000f, 0.000f);
        DKTiles.TheCameraParent.transform.position = new Vector3((50*TileSize.x)/2, 0, (40*TileSize.y)/2);
    }

    // Update is called once per frame
    void Update () {

        //==================================================================================================================
        // SCROLL & ZOOM
        //==================================================================================================================
        if(Input.GetAxis("Horizontal") > 0 ){scroller.x = 1;}else if(Input.GetAxis("Horizontal") < 0 ){scroller.x = -1;}
        else if(Input.mousePosition.x < Scroll_Width){scroller.x = -1;}
        else if(Input.mousePosition.x > Screen.width - Scroll_Width){scroller.x = 1;}
        else{scroller.x = 0;}

        if(Input.GetAxis("Vertical") > 0 ){scroller.y = 1;}else if(Input.GetAxis("Vertical") < 0 ){scroller.y = -1;}
        else if(Input.mousePosition.y < Scroll_Width){scroller.y = -1;}
        else if(Input.mousePosition.y > Screen.height - Scroll_Width){scroller.y = 1;}
        else{scroller.y = 0;}

        DKTiles.TheCameraParent.transform.Translate((scroller.x*ScrollSpeed*(Input.GetKey(KeyCode.LeftShift) ? 2 : 1))*Time.deltaTime, 0, (scroller.y*ScrollSpeed*(Input.GetKey(KeyCode.LeftShift) ? 2 : 1))*Time.deltaTime);
        camX = DKTiles.TheCameraParent.transform.position.x;
        camY = DKTiles.TheCameraParent.transform.position.z;
        camX = Mathf.Clamp(camX, 10, 999);
        camY = Mathf.Clamp(camY, 10, 999);
        Tempv.x = camX;
        Tempv.y = 0;
        Tempv.z = camY;
        DKTiles.TheCameraParent.transform.position = Tempv;

        if(Input.GetAxis("Mouse ScrollWheel") > 0){zoomer = -1f;} else if(Input.GetAxis("Mouse ScrollWheel") < 0){zoomer = 1f;}
        else if(Input.GetKey(KeyCode.End)){zoomer = 0.5f;}
        else if(Input.GetKey(KeyCode.Home)){zoomer = -0.5f;}
        else{zoomer = 0f;}

        if(Input.GetKey(KeyCode.Delete)){DKTiles.TheCameraParent.transform.Rotate(0,RotateSpeed*Time.deltaTime,0);}
        else if(Input.GetKey(KeyCode.PageDown)){DKTiles.TheCameraParent.transform.Rotate(0,-RotateSpeed*Time.deltaTime,0);}
        else if(Input.GetKey(KeyCode.PageUp)){camangle.x=0;camangle.y=0;camangle.z=0;DKTiles.TheCameraParent.transform.eulerAngles = camangle;}

        DKTiles.TheCamera.fieldOfView += (zoomer * ZoomSpeed)*Time.deltaTime;
        DKTiles.TheCamera.fieldOfView = Mathf.Clamp(DKTiles.TheCamera.fieldOfView, 15, 35);

        //==================================================================================================================
        // SHIFT MAPPING
        //==================================================================================================================



        //==================================================================================================================
        // CURSOR
        //==================================================================================================================
        ray = Camera.main.ScreenPointToRay(Input.mousePosition);
        if(Physics.Raycast(ray, out hit))
        {
            hitdistance = Vector3.Distance(DKTiles.TheCamera.transform.position, hit.point);

            Tempv.x = Input.mousePosition.x;
            Tempv.y = Input.mousePosition.y;
            Tempv.z = hitdistance-2;
            mouserayPos = DKTiles.TheCamera.ScreenToWorldPoint(Tempv);
            Tempv.x = mouserayPos.x;
            Tempv.y = 10;
            Tempv.z = mouserayPos.z;
            rayget.x = mouserayPos.x;
            rayget.y = 10;
            rayget.z = mouserayPos.z;
            DKTiles.CursorLamp.transform.position = rayget;
        }
    }
}