using UnityEngine;
using System.Collections;

public class securityCameraControl : MonoBehaviour
{
	[Header ("Main Settings")]
	[Space]

	public LayerMask layer;
	public float dragDistance = 1;
	public bool controlEnabled;
	public Vector2 clampTiltX;
	public Vector2 clampTiltZ;

	[Space]
	[Header ("Components")]
	[Space]

	public GameObject securityCameraGameObject;
	public GameObject joystick;
	public Transform joystickAxisX;
	public Transform joystickAxisZ;
	public GameObject zoomOutButton;
	public GameObject zoomInButton;

	public electronicDevice deviceManager;
	public securityCamera securityCameraManager;

	Touch currentTouch;
	int i;
	bool touchPlatform;
	bool touching;
	RaycastHit hit;
	Vector2 currentAxisValue;
	Vector3 beginTouchPosition;

	Vector2 lookAngle;
	bool zoomIn;
	bool zoomOut;
	Coroutine inCoroutine;
	Coroutine outCoroutine;
	Camera mainCamera;
	Vector2 currentTouchPosition;

	playerComponentsManager mainPlayerComponentsManager;
	playerInputManager playerInput;
	usingDevicesSystem mainUsingDevicesSystem;
	playerController mainPlayerController;

	GameObject currentPlayer;

	bool securityCameraManagerLocated;

	float lastTimeDeviceUsed;


	void Update ()
	{
		//if the security camera control is being used
		if (controlEnabled) {

			//check for touch input from the mouse or the finger
			int touchCount = Input.touchCount;
			if (!touchPlatform) {
				touchCount++;
			}

			for (i = 0; i < touchCount; i++) {
				if (!touchPlatform) {
					currentTouch = touchJoystick.convertMouseIntoFinger ();
				} else {
					currentTouch = Input.GetTouch (i);
				}

				currentTouchPosition = currentTouch.position;

				//in the touch begin phase
				if (currentTouch.phase == TouchPhase.Began && !touching) {
					//check with a ray
					Ray ray = mainCamera.ScreenPointToRay (currentTouchPosition);
					if (Physics.Raycast (ray, out hit, Mathf.Infinity, layer)) {
						//the pressed position is the joystick of the camera
						if (hit.collider.gameObject == joystick) {
							touching = true;
							//store the initial press position
							beginTouchPosition = new Vector3 (currentTouchPosition.x, currentTouchPosition.y, 0);
						}
						//the pressed position is the zoom in button
						if (hit.collider.gameObject == zoomInButton) {
							zoomIn = true;
							//move the button down
							checkButtonTranslation (true, zoomInButton, true);
						}
						//the pressed position is the zoom out button
						if (hit.collider.gameObject == zoomOutButton) {
							zoomOut = true;
							//move the button down
							checkButtonTranslation (false, zoomOutButton, true);
						}
					}
				}

				//the current touch press is being moved
				if ((currentTouch.phase == TouchPhase.Moved || currentTouch.phase == TouchPhase.Stationary) && touching) {
					//like in the joystick script, get the amount of movement between the inital press position and the current touch position
					Vector3 globalTouchPosition = new Vector3 (currentTouchPosition.x, currentTouchPosition.y, 0);
					Vector3 differenceVector = globalTouchPosition - beginTouchPosition;

					if (differenceVector.sqrMagnitude > dragDistance * dragDistance) {
						differenceVector.Normalize ();
					}

					//get the axis from the touch movement
					currentAxisValue = differenceVector;

					rotateCamera (currentAxisValue);
				}

				//if the touch ends, reset the rotation of the joystick, the current axis values and the zoom buttons positions
				if (currentTouch.phase == TouchPhase.Ended) {
					touching = false;
					currentAxisValue = Vector2.zero;
					lookAngle = Vector2.zero;

					StartCoroutine (resetJoystick ());

					if (zoomIn) {
						zoomIn = false;
						checkButtonTranslation (true, zoomInButton, false);
					}

					if (zoomOut) {
						zoomOut = false;
						checkButtonTranslation (false, zoomOutButton, false);
					}
				}
			}

			if (!touching && playerInput) {
				bool canUseInputResult = true;

				if (lastTimeDeviceUsed > 0) {
					if (Time.time > lastTimeDeviceUsed + 0.3f) {
						if (mainUsingDevicesSystem != null) {
							if (!mainUsingDevicesSystem.anyDeviceDetected ()) {
								canUseInputResult = false;
							}
						}

						if (mainPlayerController != null) {
							if (!mainPlayerController.isUsingDevice ()) {
								canUseInputResult = false;
							}
						}
					}
				}

				if (canUseInputResult) {
					currentAxisValue = playerInput.getPlayerMovementAxis ();

					rotateCamera (currentAxisValue);
				}
			}

			if (securityCameraManagerLocated) {
				//send the current axis value to the security camera to rotate it
				securityCameraManager.getLookValue (currentAxisValue);
			}
		}

		if (securityCameraManagerLocated) {
			//set the zoom in the camera
			if (zoomIn) {
				securityCameraManager.setZoom (-1);
			}

			if (zoomOut) {
				securityCameraManager.setZoom (1);
			}
		}
	}

	public void rotateCamera (Vector2 values)
	{
		if (securityCameraManagerLocated) {
			//rotate the camera joystick too
			lookAngle.x += values.x * securityCameraManager.sensitivity;
			lookAngle.y += values.y * securityCameraManager.sensitivity;
		}

		//clamp these values to limit the joystick rotation
		lookAngle.y = Mathf.Clamp (lookAngle.y, -clampTiltX.x, clampTiltX.y);
		lookAngle.x = Mathf.Clamp (lookAngle.x, -clampTiltZ.x, clampTiltZ.y);

		//apply the rotation to every component in the X and Z axis
		joystickAxisX.transform.localRotation = Quaternion.Euler (0, 0, -lookAngle.x);
		joystickAxisZ.transform.localRotation = Quaternion.Euler (lookAngle.y, 0, 0);
	}

	//reset the joystick rotation
	IEnumerator resetJoystick ()
	{
		for (float t = 0; t < 1;) {
			t += Time.deltaTime * 3;

			joystickAxisX.transform.localRotation = Quaternion.Slerp (joystickAxisX.transform.localRotation, Quaternion.identity, t);
			joystickAxisZ.transform.localRotation = Quaternion.Slerp (joystickAxisZ.transform.localRotation, Quaternion.identity, t);

			yield return null;
		}
	}

	public void activateSecurityControl ()
	{
		setSecurityCameraControlState (true);
	}

	public void deactivateSecurityCameraControl ()
	{
		setSecurityCameraControlState (false);
	}

	public void setSecurityCameraControlState (bool state)
	{
		getMainComponents ();

		touchPlatform = touchJoystick.checkTouchPlatform ();

		controlEnabled = state;

		if (controlEnabled) {
			currentPlayer = deviceManager.getCurrentPlayer ();

			if (currentPlayer != null) {
				mainPlayerComponentsManager = currentPlayer.GetComponent<playerComponentsManager> ();
				mainCamera = mainPlayerComponentsManager.getPlayerCamera ().getMainCamera ();
				playerInput = mainPlayerComponentsManager.getPlayerInputManager ();

				mainUsingDevicesSystem = mainPlayerComponentsManager.getUsingDevicesSystem ();

				mainPlayerController = mainPlayerComponentsManager.getPlayerController ();
			}
		} else {
			if (gameObject.activeInHierarchy) {
				StartCoroutine (resetJoystick ());
			}
		}

		lastTimeDeviceUsed = Time.time;

		securityCameraManagerLocated = securityCameraManager != null;

		if (securityCameraManagerLocated) {
			securityCameraManager.changeCameraState (controlEnabled);
		}
	}

	void getMainComponents ()
	{
		if (securityCameraManager == null && securityCameraGameObject != null) {
			//get the security camera component of the camera
			securityCamera currentSecurityCamera = securityCameraGameObject.GetComponent<securityCamera> ();

			if (currentSecurityCamera != null) {
				securityCameraManager = currentSecurityCamera;
			}
		}

		securityCameraManagerLocated = securityCameraManager != null;
	}

	//if this control is enabled, enable the camera component too
	void OnEnable ()
	{
		setSecurityCameraControlState (true);
	}

	//else, this control is disabled, so disable the camera component too
	void OnDisable ()
	{
		setSecurityCameraControlState (false);
	}

	//if a zoom button is pressed, check the coroutine, stop it and play it again
	void checkButtonTranslation (bool state, GameObject button, bool value)
	{
		if (state) {
			if (inCoroutine != null) {
				StopCoroutine (inCoroutine);
			}

			inCoroutine = StartCoroutine (pressButton (button, value));
		} else {
			if (outCoroutine != null) {
				StopCoroutine (outCoroutine);
			}

			outCoroutine = StartCoroutine (pressButton (button, value));
		}
	}

	//move the zoom buttons up and down when they are pressed, instead of using animations
	IEnumerator pressButton (GameObject button, bool value)
	{
		int mult = 1;

		if (value) {
			mult = -1;
		}

		Vector3 buttonPos = button.transform.localPosition;
		Vector3 newButtonPos = button.transform.localPosition + Vector3.up * (mult * 0.03f);

		for (float t = 0; t < 1;) {
			t += Time.deltaTime * 3;

			button.transform.localPosition = Vector3.MoveTowards (buttonPos, newButtonPos, t);

			yield return null;
		}
	}
}