/**
 * @author: Tomoya
 * @created_at: 1/9
 **/

using UnityEditor;
using UnityEngine;
using System.Collections;

namespace warpPlaces{
	public class SetWarpPlaces : ScriptableWizard{
		[SerializeField] private GameObject plain;
		[SerializeField] private GameObject obj;
		[SerializeField] private string parentName = "WarpPlaces";
		[SerializeField] private string objectName = "warpPlace";
		[SerializeField] private float objectOffset = 0.0f;
		[SerializeField] private float space = 10.0f;
		[SerializeField] private float x1 = -50;
		[SerializeField] private float z1 = -50;
		[SerializeField] private float x2 = 50;
		[SerializeField] private float z2 = 50;
		[SerializeField] private float groundY = 0.0f;
		[SerializeField] private float laserHeight = 20;

		private const float EXPECTED_DOWN = 10.0f;
		private Vector3 coodinate;
		private Vector3 maxCoodinate;
		private Vector3 offsetVec;
		private Vector3 spaceX;
		private Vector3 spaceZ;
		private int incX;
		private int incZ;
		private int loopCntX;
		private int loopCntZ;
		private Quaternion rot;
		private GameObject parentObj;
		private int setCnt = 0;

		[MenuItem("WarpSetter/Launch Wizard!")]
		static void CreateWizard(){
			ScriptableWizard.DisplayWizard<SetWarpPlaces> ("WarpPlaceSetter", "close", "Set warp places!!");
		}

		void OnWizardCreate(){
			Debug.Log ("close");
		}

		void OnWizardUpdate(){
			Debug.Log ("Updated Data!");
		}

		void OnWizardOtherButton(){
			Debug.Log ("Setting objects!");
			init ();
			createParentObj ();
			explore ();
		}

		void init(){
			if (space == 0)
				space = 10;
			incX = (int)((x2 - x1) / System.Math.Abs (x2 - x1));
			incZ = (int)((z2 - z1) / System.Math.Abs (z2 - z1));
			spaceX = new Vector3 (space, 0, 0);
			spaceZ = new Vector3 (0, 0, space);
			offsetVec = new Vector3 (0, objectOffset, 0);
			maxCoodinate = new Vector3 (x2, 0, z2);
			coodinate = new Vector3 (x1, groundY, z1);
			loopCntX = calcLoopCnt (x1, x2);
			loopCntZ = calcLoopCnt (z1, z2);
			Debug.Log (x1 + " " + z1);
		}

		int calcLoopCnt(float start, float end){
			if (System.Math.Abs(start - end) == 0.0f){
				return 0;
			}
			return (int)(System.Math.Floor(System.Math.Abs(start - end))/ space)+ 1;
		}

		void setObj(Vector3 xyz){
			GameObject ins = GameObject.Instantiate (obj, xyz+offsetVec, rot) as GameObject;
			ins.name = objectName + setCnt.ToString ("D7");
			ins.transform.SetParent (parentObj.transform);
			setCnt ++;
		}

		RaycastHit shootRay(Vector3 origin){
			Vector3 direction = new Vector3 (0, -1, 0);
			origin += new Vector3 (0, laserHeight, 0);
			Ray ray = new Ray (origin, direction);
			RaycastHit hit;
			Debug.DrawRay(ray.origin, ray.direction*laserHeight, Color.green, 1);
			if (!Physics.Raycast (ray, out hit, laserHeight + EXPECTED_DOWN)) {
				return hit;
			}
			return hit;
		}

		void createParentObj(){
			parentObj = new GameObject ();
			if (parentName == ""){
				parentName = "WarpPlaces";
			}
			parentObj.name = parentName;
			Undo.RegisterCreatedObjectUndo (parentObj, "Create " + parentObj.name);
		}

		void explore(){
			Debug.Log("Explore!");
			Debug.Log ("coodinate: " + coodinate.x + " " + coodinate.z);
			Debug.Log("target: " + x2 + ", " + z2);
			Vector3 spaceAdderX = new Vector3(0,0,0);
			Vector3 spaceAdderZ = new Vector3 (0, 0, 0);

			for (int idxX=0; idxX < loopCntX; idxX ++) {
				for (int idxZ=0; idxZ < loopCntZ; idxZ ++) {
					RaycastHit hit = shootRay (coodinate + spaceAdderX + spaceAdderZ);
					//TODO: set object
					if (hit.collider.gameObject != null){
						setObj (hit.point);
					}
					//Debug.Log(hit.point.x + " : " + hit.point.z);
					spaceAdderZ += spaceZ*incZ;
				}
				spaceAdderZ *= 0;
				spaceAdderX += spaceX*incX;
			}

		}

	}
}