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

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

	public bool checkCharacterFallEnabled = true;

	public float minTimeOnAirToActivateFreeFall = 2;

	public int regularAirID = -1;
	public int freeFallID = 3;

	public bool setNewCameraStateOnFreeFallActive;

	public string newCameraStateOnFreeFall;

	public Vector3 capsuleColliderCenter = new Vector3 (0, 1, 0);

	public bool useMinFallSpeedToActivateState;
	public float minFallSpeedToActivateState;

	public bool avoidFallDamageOnFreeFall;

	public bool avoidFallDamageOnFreeFallOnlyOnTurbo;

	[Space]
	[Header ("Turbo Settings")]
	[Space]

	public bool fallTurboEnabled = true;
	public float fallTurboMultiplier = 2;

	public bool useCameraShake;
	public string regularCameraShakeName;

	public bool useMaxFallSpeed;

	public float maxFallSpeed;

	[Space]

	public bool useEventOnLandingWithTurbo;
	public UnityEvent eventOnLandingWithTurbo;

	[Space]
	[Header ("Debug")]
	[Space]

	public bool checkingFreeFall;

	public bool freeFallActive;

	public bool freeFallPaused;

	public bool fallTurboActive;

	[Space]
	[Header ("Event Settings")]
	[Space]

	public bool useEventsOnFreeFallStateChange;
	public UnityEvent eventOnFreeFallActive;
	public UnityEvent eventOnFreeFallDeactivate;

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

	public playerCamera mainPlayerCamera;

	public playerController mainPlayerController;

	float lastTimeFalling;

	float lastTimeJump;

	string previousCameraState;

	bool resetCheckOnFreeFallActive;

	void Update ()
	{
		if (checkCharacterFallEnabled) {
			if (freeFallPaused) {
				return;
			}

			if (!checkingFreeFall) {
				if (!mainPlayerController.isPlayerOnGround () &&
				    mainPlayerController.getCurrentAirID () == regularAirID &&
				    !mainPlayerController.isExternalControlBehaviorForAirTypeActive () &&
				    !mainPlayerController.isPlayerDriving ()) {

					checkingFreeFall = true;

					lastTimeFalling = Time.time;
				}
			} else {
				if (!freeFallActive) {
					if (Time.time > minTimeOnAirToActivateFreeFall + lastTimeFalling && checkFallSpeed ()) {

						if (mainPlayerController.getCurrentAirID () == regularAirID) {
							setFreeFallState (true);
						} else {
							checkingFreeFall = false;
						}
					} else {
						if (mainPlayerController.isPlayerOnGround () ||
						    mainPlayerController.isActionActive () ||
						    mainPlayerController.isGravityPowerActive () ||
						    mainPlayerController.isPlayerOnFFOrZeroGravityModeOn () ||
						    mainPlayerController.isChoosingGravityDirection () ||
						    mainPlayerController.isGravityForcePaused () ||
						    mainPlayerController.isWallRunningActive () ||
						    mainPlayerController.isSwimModeActive () ||
						    mainPlayerController.isSphereModeActive () ||
						    mainPlayerController.isExternalControlBehaviorForAirTypeActive () ||
						    mainPlayerController.isPlayerDriving () ||
						    mainPlayerController.isSlowFallExternallyActive ()) {

							setFreeFallState (false);
						}
					}
				} else {
					if (mainPlayerController.isPlayerOnGround () ||
					    mainPlayerController.isPlayerAiming () ||
					    lastTimeJump != mainPlayerController.getLastDoubleJumpTime () ||
					    mainPlayerController.isExternalControlBehaviorForAirTypeActive () ||
					    resetCheckOnFreeFallActive) {

						resetRegularPlayerValues ();

						disableFreeFallActiveState ();
					}

					if (mainPlayerController.getCurrentAirID () != freeFallID) {
						disableFreeFallActiveState ();
					}
				}
			}
		}
	}

	public void disableFreeFallActiveState ()
	{
		resetCheckOnFreeFallActive = false;

		setFreeFallState (false);
	}

	public void setFreeFallPausedState (bool state)
	{
		if (!state) {
			if (freeFallActive) {
				resetRegularPlayerValues ();

				disableFreeFallActiveState ();
			}
		}

		freeFallPaused = state;
	}

	public bool checkFallSpeed ()
	{
		if (useMinFallSpeedToActivateState) {
			if (Mathf.Abs (mainPlayerController.getVerticalSpeed ()) > minFallSpeedToActivateState) {
				return true;
			} else {
				return false;
			}
		}

		return true;
	}

	public void setResetCheckOnFreeFallActiveState (bool state)
	{
		resetCheckOnFreeFallActive = state;
	}

	public void inputEnableOrDisableFallTurbo (bool state)
	{
		if (!fallTurboEnabled) {
			return;
		}

		if (freeFallActive) {
			setTurboState (state);
		}
	}

	void setTurboState (bool state)
	{
		if (fallTurboActive == state) {
			return;
		}

		fallTurboActive = state;

		if (fallTurboActive) {
			mainPlayerController.setGravityMultiplierValueFromExternalFunction (fallTurboMultiplier);	

			mainPlayerController.setCurrentAirSpeedValue (2);

			if (useCameraShake) {
				mainPlayerCamera.setShakeCameraState (true, regularCameraShakeName);
			}
		} else {
			mainPlayerController.setGravityMultiplierValue (true, 0);

			mainPlayerController.setCurrentAirSpeedValue (1);

			if (useCameraShake) {
				mainPlayerCamera.setShakeCameraState (false, "");
			}
		}

		if (avoidFallDamageOnFreeFall && avoidFallDamageOnFreeFallOnlyOnTurbo) {
			mainPlayerController.setFallDamageCheckOnHealthPausedState (state);
		}

		if (useMaxFallSpeed) {
			mainPlayerController.setUseMaxFallSpeedExternallyActiveState (state);

			if (state) {
				mainPlayerController.setCustomMaxFallSpeedExternally (maxFallSpeed); 
			} else {
				mainPlayerController.setCustomMaxFallSpeedExternally (0); 
			}
		}
	}

	void setFreeFallState (bool state)
	{
		if (state) {
			freeFallActive = true;

			mainPlayerController.setCurrentAirIDValue (freeFallID);

			mainPlayerController.setPlayerCapsuleColliderDirection (2);

			mainPlayerController.setPlayerColliderCapsuleCenter (capsuleColliderCenter);

			lastTimeJump = mainPlayerController.getLastDoubleJumpTime ();

			if (setNewCameraStateOnFreeFallActive) {
				previousCameraState = mainPlayerCamera.getCurrentStateName ();

				mainPlayerCamera.setCameraStateOnlyOnThirdPerson (newCameraStateOnFreeFall);
			}

			if (avoidFallDamageOnFreeFall && !avoidFallDamageOnFreeFallOnlyOnTurbo) {
				mainPlayerController.setFallDamageCheckOnHealthPausedState (true);
			}

		} else {
			if (avoidFallDamageOnFreeFall) {
				mainPlayerController.setFallDamageCheckOnHealthPausedState (false);
			}

			if (fallTurboActive) {
				if (useEventOnLandingWithTurbo) {
					if (mainPlayerController.checkIfPlayerOnGroundWithRaycast () || mainPlayerController.isPlayerOnGround ()) {
						eventOnLandingWithTurbo.Invoke ();
					}
				}

				setTurboState (false);
			}

			checkingFreeFall = false;

			freeFallActive = false;

			if (setNewCameraStateOnFreeFallActive) {
				if (previousCameraState != "") {
					mainPlayerCamera.setCameraStateOnlyOnThirdPerson (previousCameraState);

					previousCameraState = "";
				}
			}

			if (useMaxFallSpeed) {
				mainPlayerController.setUseMaxFallSpeedExternallyActiveState (false);

				mainPlayerController.setCustomMaxFallSpeedExternally (0); 
			}
		}

		checkEventsOnFreeFallStateChange (state);
	}

	public void stopFreeFallStateIfActive ()
	{
		if (freeFallActive) {
			resetRegularPlayerValues ();

			disableFreeFallActiveState ();
		}
	}

	void resetRegularPlayerValues ()
	{
		if (mainPlayerController.getCurrentAirID () == freeFallID) {
			mainPlayerController.setCurrentAirIDValue (regularAirID);

			mainPlayerController.setPlayerCapsuleColliderDirection (1);

			mainPlayerController.setOriginalPlayerColliderCapsuleScale ();
		}
	}

	void checkEventsOnFreeFallStateChange (bool state)
	{
		if (useEventsOnFreeFallStateChange) {
			if (state) {
				eventOnFreeFallActive.Invoke ();
			} else {
				eventOnFreeFallDeactivate.Invoke ();
			}
		}
	}
}