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

public class jetpackSystem : externalControllerBehavior
{
    [Header ("Main Setting")]
    [Space]

    public bool jetpackEnabled;

    public float jetpackForce;
    public float jetpackAirSpeed;
    public float jetpackAirControl;

    public bool turboEnabled = true;
    public float jetpackTurboHorizontalSpeed = 5;
    public float jetpackTurboVerticalSpeed = 5;

    public bool useForceMode;

    public ForceMode forceMode;

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

    public bool disableJetpackMeshWhenNotEquipped = true;

    public float jetpackHorizontalSpeedOnAimMultiplier = 0.5f;
    public float jetpackVerticalSpeedOnAimMultiplier = 0.5f;

    public string shakeCameraStateName = "Use Jetpack Turbo";

    [Space]

    public bool useCustomJetpackUpDirection;
    public Transform customJetpackUpDirection;

    public bool usedByAI;

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

    public float jetpackFuelAmount;
    public float jetpackFuelRate;
    public float regenerativeSpeed;
    public float timeToRegenerate;

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

    public bool useJetpackAnimation = true;

    public string jetpackModeName = "Jetpack Mode";

    public int regularAirID = -1;
    public int jetpackID = 2;

    public bool useIKJetpack;

    public string animationName;

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

    public List<ParticleSystem> thrustsParticles = new List<ParticleSystem> ();

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

    public bool jetPackEquiped;
    public bool usingJetpack;
    public bool turboActive;

    public bool jetpackModePaused;

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

    public UnityEvent eventOnStartUsingJetpack;
    public UnityEvent eventOnStopUsingJetpack;

    public UnityEvent eventOnStateEnabled;
    public UnityEvent eventOnStateDisabled;

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

    public GameObject jetpack;
    public GameObject jetpackHUDInfo;
    public Slider jetpackSlider;
    public Text fuelAmountText;

    public playerController mainPlayerController;
    public playerCamera mainPlayerCamera;
    public Animation jetPackAnimation;
    public IKSystem IKManager;
    public Transform playerTransform;

    public Rigidbody mainRigidbody;


    bool hudEnabled;
    float lastTimeUsed;

    Vector3 airMove;

    float currentHorizontalAimSpeedMultipler;
    float currentVerticalAimSpeedMultipler;

    Vector3 totalForce;

    bool playerIsAiming;

    bool turboActivePreviously;

    bool originalJetpackEnabled;

    externalControllerBehavior previousExternalControllerBehavior;


    void Start ()
    {
        if (usedByAI) {
            return;
        }

        if (jetpack == null) {
            jetpackEnabled = false;

            return;
        }

        changeThrustsParticlesState (false);

        if (jetpackFuelAmount > 0) {
            jetpackSlider.maxValue = jetpackFuelAmount;
            jetpackSlider.value = jetpackFuelAmount;

            hudEnabled = true;

            updateJetpackUIInfo ();
        }

        if (!jetpackEnabled || disableJetpackMeshWhenNotEquipped) {
            if (jetpack.activeSelf) {
                jetpack.SetActive (false);
            }
        }

        originalJetpackEnabled = jetpackEnabled;
    }

    public override void updateControllerBehavior ()
    {
        if (usedByAI) {
            return;
        }

        if (jetPackEquiped) {
            //if the player is using the jetpack
            if (usingJetpack) {

                currentHorizontalAimSpeedMultipler = 1;
                currentVerticalAimSpeedMultipler = 1;

                playerIsAiming = mainPlayerController.isPlayerAiming ();

                if (!mainPlayerController.isPlayerOnFirstPerson () && playerIsAiming) {
                    currentHorizontalAimSpeedMultipler = jetpackHorizontalSpeedOnAimMultiplier;
                    currentVerticalAimSpeedMultipler = jetpackVerticalSpeedOnAimMultiplier;
                }

                airMove = mainPlayerController.getMoveInputDirection () * (jetpackAirSpeed * currentHorizontalAimSpeedMultipler);

                if (turboActive) {
                    airMove *= jetpackTurboHorizontalSpeed;
                }

                Vector3 currentUpDirection = playerTransform.up;

                if (useCustomJetpackUpDirection) {
                    currentUpDirection = customJetpackUpDirection.up;
                }

                airMove += playerTransform.InverseTransformDirection (mainPlayerController.currentVelocity).y * currentUpDirection;

                mainPlayerController.currentVelocity = Vector3.Lerp (mainPlayerController.currentVelocity, airMove, Time.fixedDeltaTime * jetpackAirControl);

                totalForce = currentUpDirection * (-mainPlayerController.getGravityForce () * mainRigidbody.mass * jetpackForce * currentVerticalAimSpeedMultipler);

                if (turboActive) {
                    totalForce *= jetpackTurboVerticalSpeed;
                }

                if (useForceMode) {
                    mainRigidbody.AddForce (totalForce, forceMode);
                } else {
                    mainRigidbody.AddForce (totalForce);
                }

                if (playerIsAiming) {
                    if (turboActive) {
                        if (!turboActivePreviously) {
                            turboActivePreviously = true;

                            enableOrDisableTurbo (false);
                        }
                    }
                } else {
                    if (turboActivePreviously) {
                        enableOrDisableTurbo (true);

                        turboActivePreviously = false;
                    }
                }
            }

            if (mainPlayerController.isPlayerOnFFOrZeroGravityModeOn ()) {
                enableOrDisableJetpack (false);
            }

            if (usingJetpack) {
                mainPlayerController.setPlayerOnGroundState (false);

                if (hudEnabled) {
                    jetpackFuelAmount -= Time.deltaTime * jetpackFuelRate;

                    updateJetpackUIInfo ();

                    jetpackSlider.value = jetpackFuelAmount;
                }

                if (jetpackFuelAmount <= 0) {
                    startOrStopJetpack (false);
                }

            } else {
                if (regenerativeSpeed > 0 && lastTimeUsed != 0) {

                    if (Time.time > lastTimeUsed + timeToRegenerate) {

                        jetpackFuelAmount += regenerativeSpeed * Time.deltaTime;

                        if (jetpackFuelAmount >= jetpackSlider.maxValue) {
                            jetpackFuelAmount = jetpackSlider.maxValue;
                            lastTimeUsed = 0;
                        }

                        updateJetpackUIInfo ();

                        jetpackSlider.value = jetpackFuelAmount;
                    }
                }
            }
        }
    }

    void updateJetpackUIInfo ()
    {
        //jetpackSlider.maxValue.ToString ("0") + " / " + 
        fuelAmountText.text = jetpackFuelAmount.ToString ("0");
    }

    public bool canUseJetpack ()
    {
        bool value = false;

        if (jetpackFuelAmount > 0) {
            value = true;
        }

        if (jetpackModePaused) {
            value = false;
        }

        return value;
    }

    public void startOrStopJetpack (bool state)
    {
        if (usingJetpack != state) {
            usingJetpack = state;

            if (useJetpackAnimation) {
                if (usingJetpack) {
                    jetPackAnimation [animationName].speed = 1;
                    jetPackAnimation.Play (animationName);
                } else {
                    jetPackAnimation [animationName].speed = -1;
                    jetPackAnimation [animationName].time = jetPackAnimation [animationName].length;
                    jetPackAnimation.Play (animationName);
                }
            }

            if (usingJetpack) {
                externalControllerBehavior currentExternalControllerBehavior = mainPlayerController.getCurrentExternalControllerBehavior ();

                if (currentExternalControllerBehavior != this) {
                    if (previousExternalControllerBehavior == null && currentExternalControllerBehavior != null) {
                        previousExternalControllerBehavior = currentExternalControllerBehavior;
                    }

                    mainPlayerController.setExternalControllerBehavior (this);
                }
            }

            mainPlayerController.setUsingJetpackState (usingJetpack);

            if (!usingJetpack) {
                mainPlayerController.setLastTimeFalling ();

                lastTimeUsed = Time.time;
            }

            changeThrustsParticlesState (usingJetpack);

            if (useIKJetpack) {
                IKManager.setIKBodyState (usingJetpack, jetpackModeName);
            }

            if (usingJetpack) {
                mainPlayerController.setCurrentAirIDValue (jetpackID);
            } else {
                mainPlayerController.setCurrentAirIDValue (regularAirID);
            }

            if (usingJetpack) {
                eventOnStartUsingJetpack.Invoke ();
            } else {
                eventOnStopUsingJetpack.Invoke ();
            }

            if (!usingJetpack) {
                if (turboActive) {
                    enableOrDisableTurbo (false);
                }
            }

            turboActivePreviously = false;
        }
    }

    public void changeThrustsParticlesState (bool state)
    {
        for (int i = 0; i < thrustsParticles.Count; i++) {
            if (state) {
                if (!thrustsParticles [i].isPlaying) {
                    thrustsParticles [i].gameObject.SetActive (true);
                    thrustsParticles [i].Play ();

                    var boostingParticlesMain = thrustsParticles [i].main;
                    boostingParticlesMain.loop = true;
                }
            } else {
                if (thrustsParticles [i].isPlaying) {
                    var boostingParticlesMain = thrustsParticles [i].main;
                    boostingParticlesMain.loop = false;
                }
            }
        }
    }

    public void enableOrDisableJetpack (bool state)
    {
        if (!jetpackEnabled && state) {
            return;
        }

        if (jetPackEquiped == state) {
            return;
        }

        if (mainPlayerController.isUseExternalControllerBehaviorPaused ()) {
            return;
        }

        if (jetpackModePaused && state) {
            return;
        }

        if (state) {
            externalControllerBehavior currentExternalControllerBehavior = mainPlayerController.getCurrentExternalControllerBehavior ();

            if (currentExternalControllerBehavior != null && currentExternalControllerBehavior != this) {
                if (canBeActivatedIfOthersBehaviorsActive && checkIfCanEnableBehavior (currentExternalControllerBehavior.behaviorName)) {
                    currentExternalControllerBehavior.disableExternalControllerState ();
                } else {
                    return;
                }
            }
        }

        bool jetpackEquipedPreviously = jetPackEquiped;

        jetPackEquiped = state;

        mainPlayerController.equipJetpack (state);

        setBehaviorCurrentlyActiveState (state);

        setCurrentPlayerActionSystemCustomActionCategoryID ();

        if (jetPackEquiped) {
            if (previousExternalControllerBehavior == null) {
                previousExternalControllerBehavior = mainPlayerController.getCurrentExternalControllerBehavior ();

                if (previousExternalControllerBehavior == this) {
                    previousExternalControllerBehavior = null;
                }
            }

            mainPlayerController.setExternalControllerBehavior (this);
        } else {
            if (jetpackEquipedPreviously) {
                externalControllerBehavior currentExternalControllerBehavior = mainPlayerController.getCurrentExternalControllerBehavior ();

                if (currentExternalControllerBehavior == null || currentExternalControllerBehavior == this) {
                    mainPlayerController.setExternalControllerBehavior (null);
                }
            }
        }

        if (jetPackEquiped) {
            if (hudEnabled) {
                if (jetpackHUDInfo.activeSelf != jetPackEquiped) {
                    jetpackHUDInfo.SetActive (jetPackEquiped);
                }
            }

            eventOnStateEnabled.Invoke ();
        } else {
            if (jetpackHUDInfo.activeSelf != jetPackEquiped) {
                jetpackHUDInfo.SetActive (jetPackEquiped);
            }

            eventOnStateDisabled.Invoke ();

            if (usingJetpack) {
                if (useJetpackAnimation) {
                    jetPackAnimation [animationName].speed = -1;
                    jetPackAnimation [animationName].time = 0;

                    jetPackAnimation.Rewind ();
                }

                startOrStopJetpack (false);
            }
        }

        if (disableJetpackMeshWhenNotEquipped) {
            if (jetpack != null) {
                if (jetpack.activeSelf != jetPackEquiped) {
                    jetpack.SetActive (jetPackEquiped);
                }
            }
        }

        if (!state) {
            if (previousExternalControllerBehavior != null) {

                if (previousExternalControllerBehavior != this) {
                    previousExternalControllerBehavior.checkIfResumeExternalControllerState ();
                }
            }
        }
    }

    public void getJetpackFuel (float amount)
    {
        jetpackFuelAmount += amount;

        if (jetpackFuelAmount > jetpackSlider.maxValue) {
            jetpackFuelAmount = jetpackSlider.maxValue;
        }

        updateJetpackUIInfo ();

        jetpackSlider.value = jetpackFuelAmount;
    }

    public float getJetpackFuelAmountToPick ()
    {
        return jetpackSlider.maxValue - jetpackFuelAmount;
    }

    public void enableOrDisableJetPackMesh (bool state)
    {
        if (!jetpackEnabled && state) {
            return;
        }

        bool jetpackMeshState = state;

        if (disableJetpackMeshWhenNotEquipped && !jetPackEquiped) {
            jetpackMeshState = false;
        }

        if (jetpack != null) {
            if (jetpack.activeSelf != jetpackMeshState) {
                jetpack.SetActive (jetpackMeshState);
            }
        }
    }

    public void removeJetpackMesh ()
    {
        if (jetpack != null) {
            DestroyImmediate (jetpack);
        }
    }

    public void setUsedByAIState (bool state)
    {
        usedByAI = state;
    }

    public void enableOrDisableTurbo (bool state)
    {
        turboActive = state;

        mainPlayerCamera.changeCameraFov (turboActive);

        //when the player accelerates his movement in the air, the camera shakes
        if (turboActive) {
            mainPlayerCamera.setShakeCameraState (true, shakeCameraStateName);
        } else {
            mainPlayerCamera.setShakeCameraState (false, "");

            mainPlayerCamera.stopShakeCamera ();
        }

        if (turboActive) {
            mainPlayerController.setCurrentAirSpeedValue (2);
        } else {
            mainPlayerController.setCurrentAirSpeedValue (1);
        }
    }

    public void setJetpackEnabledState (bool state)
    {
        if (jetPackEquiped) {
            enableOrDisableJetpack (false);
        }

        jetpackEnabled = state;
    }

    public void setOriginalJetpackEnabledState ()
    {
        setJetpackEnabledState (originalJetpackEnabled);
    }

    public void setJetpackModePausedState (bool state)
    {
        if (state) {
            if (usingJetpack) {
                startOrStopJetpack (false);
            }
        }

        jetpackModePaused = state;
    }

    //Input Elements
    public void inputStartOrStopJetpack (bool state)
    {
        if (jetPackEquiped && !mainPlayerController.driving && canUseJetpack ()) {
            startOrStopJetpack (state);
        }
    }

    public void inputChangeTurboState (bool state)
    {
        if (jetPackEquiped && usingJetpack && turboEnabled) {
            if (state) {
                if (playerIsAiming) {
                    turboActivePreviously = true;

                    return;
                }
            } else {
                turboActivePreviously = false;
            }

            enableOrDisableTurbo (state);
        }
    }

    public override void disableExternalControllerState ()
    {
        enableOrDisableJetpack (false);
    }

    public override void setCurrentPlayerActionSystemCustomActionCategoryID ()
    {
        if (behaviorCurrentlyActive) {
            if (customActionCategoryID > -1) {
                mainPlayerController.setCurrentCustomActionCategoryID (customActionCategoryID);
            }
        } else {
            if (regularActionCategoryID > -1) {
                mainPlayerController.setCurrentCustomActionCategoryID (regularActionCategoryID);
            }
        }
    }

    public void setJetpackEnabledStateFromEditor (bool state)
    {
        setJetpackEnabledState (state);

        updateComponent ();
    }

    void updateComponent ()
    {
        GKC_Utils.updateComponent (this);

        GKC_Utils.updateDirtyScene ("Update Jetpack System", gameObject);
    }
}