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

public class GrowGround : MonoBehaviour
{
	Vector2 PlayerPos;
	Vector2 GroundPos;

	float Dis1, Dis2, Dis3, Dis4;
	float UpSignAlpha = 0, DownSignAlpha = 0, RightSighAlpha = 0, LeftSignAlpha = 0;

	bool isUpSpawn = false, isDownSpawn = false, isRightSpawn = false, isLeftSpawn = false;
	bool isSetUp = false, isSetDown = false, isSetRight = false, isSetLeft = false;
	bool isUpFade = false, isDownFade = false, isRightFade = false, isLeftFade = false;

	public GameObject[] SignSelect;
	public GameObject GroundClone;
	public GameObject GroundPrefabe;

	void Start ()
	{
		GroundPos = new Vector2 (this.transform.position.x, this.transform.position.y);
		for (int i = 0; i < SignSelect.Length; i++) {
			SignSelect [i].SetActive (false);
		}
	}

	void Update ()
	{
		GroundSpawn ();
		SignFade ();
	}

	void GroundSpawn ()
	{
		PlayerPos = new Vector2 (GameObject.Find ("Player").transform.position.x, GameObject.Find ("Player").transform.position.y);
		Dis1 = Vector2.Distance (new Vector2 (GroundPos.x, GroundPos.y + 1f), PlayerPos);
		Dis2 = Vector2.Distance (new Vector2 (GroundPos.x, GroundPos.y - 1f), PlayerPos);
		Dis3 = Vector2.Distance (new Vector2 (GroundPos.x + 1f, GroundPos.y), PlayerPos);
		Dis4 = Vector2.Distance (new Vector2 (GroundPos.x - 1f, GroundPos.y), PlayerPos);
		if (isUpSpawn == true) {
			RaycastHit2D hit = Physics2D.Raycast (new Vector2 (GroundPos.x, GroundPos.y + 0.55f), new Vector2 (0, 0.5f), 0.1f);
			if (Dis1 > 1f) {
				SignSelect [0].SetActive (false);
				if (hit.collider != null) {
					if (hit.collider.tag == "Ground") {
						isUpSpawn = false;
					}
				} else {
					isUpSpawn = false;
					GroundClone = Instantiate (GroundPrefabe, this.transform.position + new Vector3 (0, 1f, 0), Quaternion.identity);
				}
			}
		}
		if (isDownSpawn == true) {
			RaycastHit2D hit = Physics2D.Raycast (new Vector2 (GroundPos.x, GroundPos.y - 0.55f), new Vector2 (0, -0.5f), 0.1f);
			if (Dis2 > 1f) {
				SignSelect [1].SetActive (false);
				if (hit.collider != null) {
					if (hit.collider.tag == "Ground") {
						isDownSpawn = false;
					}
				} else {
					isDownSpawn = false;
					GroundClone = Instantiate (GroundPrefabe, this.transform.position + new Vector3 (0, -1f, 0), Quaternion.identity);
				}
			}
		}
		if (isRightSpawn == true) {
			RaycastHit2D hit = Physics2D.Raycast (new Vector2 (GroundPos.x + 0.55f, GroundPos.y), new Vector2 (0.5f, 0), 0.1f);
			if (Dis3 > 1.1f) {
				SignSelect [2].SetActive (false);
				if (hit.collider != null) {
					if (hit.collider.tag == "Ground") {
						isRightSpawn = false;
					}
				} else {
					isRightSpawn = false;
					GroundClone = Instantiate (GroundPrefabe, this.transform.position + new Vector3 (1f, 0, 0), Quaternion.identity);
				}
			}
		}
		if (isLeftSpawn == true) {
			RaycastHit2D hit = Physics2D.Raycast (new Vector2 (GroundPos.x - 0.55f, GroundPos.y), new Vector2 (-0.5f, 0), 0.1f);
			if (Dis4 > 1.1f) {
				SignSelect [3].SetActive (false);
				if (hit.collider != null) {
					if (hit.collider.tag == "Ground") {
						isLeftSpawn = false;
					}
				} else {
					isLeftSpawn = false;
					GroundClone = Instantiate (GroundPrefabe, this.transform.position + new Vector3 (-1f, 0, 0), Quaternion.identity);
				}
			}
		}
	}

	void SignFade ()
	{
		if (isUpFade == false) {
			if (UpSignAlpha < 1f) {
				UpSignAlpha += 2f * Time.deltaTime;
				SignSelect [0].GetComponent<SpriteRenderer> ().color = new Color (1, 0, 0, UpSignAlpha);
			} else {
				isUpFade = true;
			}
		} else {
			if (UpSignAlpha > 0f) {
				UpSignAlpha -= 2f * Time.deltaTime;
				SignSelect [0].GetComponent<SpriteRenderer> ().color = new Color (1, 0, 0, UpSignAlpha);
			} else {
				isUpFade = false;
			}
		}

		if (isDownFade == false) {
			if (DownSignAlpha < 1f) {
				DownSignAlpha += 2f * Time.deltaTime;
				SignSelect [1].GetComponent<SpriteRenderer> ().color = new Color (1, 0, 0, DownSignAlpha);
			} else {
				isDownFade = true;
			}
		} else {
			if (DownSignAlpha > 0f) {
				DownSignAlpha -= 2f * Time.deltaTime;
				SignSelect [1].GetComponent<SpriteRenderer> ().color = new Color (1, 0, 0, DownSignAlpha);
			} else {
				isDownFade = false;
			}
		}

		if (isRightFade == false) {
			if (RightSighAlpha < 1f) {
				RightSighAlpha += 2f * Time.deltaTime;
				SignSelect [2].GetComponent<SpriteRenderer> ().color = new Color (1, 0, 0, RightSighAlpha);
			} else {
				isRightFade = true;
			}
		} else {
			if (RightSighAlpha > 0f) {
				RightSighAlpha -= 2f * Time.deltaTime;
				SignSelect [2].GetComponent<SpriteRenderer> ().color = new Color (1, 0, 0, RightSighAlpha);
			} else {
				isRightFade = false;
			}
		}

		if (isLeftFade == false) {
			if (LeftSignAlpha < 1f) {
				LeftSignAlpha += 2f * Time.deltaTime;
				SignSelect [3].GetComponent<SpriteRenderer> ().color = new Color (1, 0, 0, LeftSignAlpha);
			} else {
				isLeftFade = true;
			}
		} else {
			if (LeftSignAlpha > 0f) {
				LeftSignAlpha -= 2f * Time.deltaTime;
				SignSelect [3].GetComponent<SpriteRenderer> ().color = new Color (1, 0, 0, LeftSignAlpha);
			} else {
				isLeftFade = false;
			}
		}
	}

	void OnCollisionStay2D (Collision2D col)
	{
		if (col.gameObject.tag == "Player") {

			if ((PlayerPos.x - GroundPos.x < 0.575f && PlayerPos.x - GroundPos.x > -0.575f) && (PlayerPos.y - GroundPos.y > 0.625f)) {
				isSetUp = true;
				SignSelect [0].SetActive (true);
			}

			if ((PlayerPos.x - GroundPos.x < 0.575f && PlayerPos.x - GroundPos.x > -0.575f) && (PlayerPos.y - GroundPos.y < -0.625f)) {
				isSetDown = true;
				SignSelect [1].SetActive (true);
			}

			if (PlayerPos.x - GroundPos.x > 0.625f && (PlayerPos.y - GroundPos.y < 0.575f && PlayerPos.y - GroundPos.y > -0.575f)) {
				isSetRight = true;
				SignSelect [2].SetActive (true);
			}
			if ((PlayerPos.x - GroundPos.x < -0.625f && (PlayerPos.y - GroundPos.y < 0.575f) && PlayerPos.y - GroundPos.y > -0.575f)) {
				isSetLeft = true;
				SignSelect [3].SetActive (true);
			}
		}
	}

	void OnCollisionExit2D (Collision2D col)
	{
		if (col.gameObject.tag == "Player") {
			if (isSetUp == true) {
				isUpSpawn = true;
				isSetUp = false;
			}
			if (isSetDown == true) {
				isDownSpawn = true;
				isSetDown = false;
			}
			if (isSetRight == true) {
				isRightSpawn = true;
				isSetRight = false;
			}
			if (isSetLeft == true) {
				isLeftSpawn = true;
				isSetLeft = false;
			}
		}
	}
}