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

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

    public LayerMask layer;

    public bool canHeal;
    public float healRate;
    public float healtAmount;

    [Space]

    public bool canDamage;
    public float damageRate;
    public float damageAmount;

    [Space]

    public bool canRefillEnergy;
    public float energyRate;
    public float energyAmount;

    [Space]

    public bool canRefillFuel;
    public float fuelRate;
    public float fuelAmount;

    [Space]

    public bool canGatherHealth;
    public bool canGatherEnergy;
    public bool canGatherFuel;

    [Space]

    public bool useWithVehicles;
    public bool useWithCharacters;

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

    public bool ignoreShield;

    public int damageTypeID = -1;

    public bool damageCanBeBlocked = true;

    public bool canActivateReactionSystemTemporally;
    public int damageReactionID = -1;

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

    public bool showDebugPrint;

    public GameObject currentObjectToCheck;
    public GameObject currentHealthElement;
    public bool targetFound;

    public bool searchingTargets;

    public bool healModeActive;

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

    public Transform mainCameraTransform;
    public playerWeaponSystem weaponManager;


    float lastTime;
    RaycastHit hit;

    Coroutine updateCoroutine;


    public void stopUpdateCoroutine ()
    {
        if (updateCoroutine != null) {
            StopCoroutine (updateCoroutine);
        }
    }

    IEnumerator updateSystemCoroutine ()
    {
        var waitTime = new WaitForFixedUpdate ();

        while (true) {
            updateSystem ();

            yield return waitTime;
        }
    }


    void updateSystem ()
    {
        if (searchingTargets) {
            if (Physics.Raycast (mainCameraTransform.position, mainCameraTransform.TransformDirection (Vector3.forward), out hit, Mathf.Infinity, layer)) {
                currentObjectToCheck = hit.collider.gameObject;

                if (!targetFound) {
                    checkTarget (currentObjectToCheck);
                    print (currentObjectToCheck.name);

                } else {
                    if (currentHealthElement != currentObjectToCheck) {
                        changeTriggerState (false, null, 0);

                        print ("removed");
                    }
                }
            } else {
                targetFound = false;
            }
        }

        if (targetFound && currentHealthElement != null) {
            if (healModeActive) {
                if (canHeal) {
                    if (Time.time > lastTime + healRate) {
                        //while the object is not fully healed, then 
                        if (!applyDamage.checkIfMaxHealth (currentHealthElement) && weaponManager.remainAmmoInClip ()) {
                            //heal it
                            applyDamage.setHeal (healtAmount, currentHealthElement);

                            lastTime = Time.time;

                            if (canGatherHealth) {
                                int amountOfAmmo = (int)Mathf.Round (healtAmount);

                                weaponManager.useAmmo (amountOfAmmo);

                                weaponManager.checkToUpdateInventoryWeaponAmmoTextFromWeaponSystem ();
                            }
                        } else {
                            //else, stop healing it
                            changeTriggerState (false, null, 0);

                            return;
                        }
                    }
                }

                if (canRefillFuel) {
                    if (Time.time > lastTime + fuelRate) {
                        //while the vehicle has not the max fuel amount, then
                        if (!applyDamage.checkIfMaxFuel (currentHealthElement) && weaponManager.remainAmmoInClip ()) {
                            //fill it
                            applyDamage.setFuel (fuelAmount, currentHealthElement);

                            lastTime = Time.time;

                            if (canGatherFuel) {
                                int amountOfAmmo = (int)Mathf.Round (fuelAmount);

                                weaponManager.useAmmo (amountOfAmmo);

                                weaponManager.checkToUpdateInventoryWeaponAmmoTextFromWeaponSystem ();
                            }
                        } else {
                            //else, stop refill it
                            changeTriggerState (false, null, 0);

                            return;
                        }
                    }
                }

                if (canRefillEnergy) {
                    if (Time.time > lastTime + energyRate) {
                        //while the vehicle has not the max fuel amount, then
                        if (!applyDamage.checkIfMaxEnergy (currentHealthElement) && weaponManager.remainAmmoInClip ()) {
                            //fill it
                            applyDamage.setEnergy (energyAmount, currentHealthElement);

                            lastTime = Time.time;

                            if (canGatherEnergy) {
                                int amountOfAmmo = (int)Mathf.Round (energyAmount);

                                weaponManager.useAmmo (amountOfAmmo);

                                weaponManager.checkToUpdateInventoryWeaponAmmoTextFromWeaponSystem ();
                            }
                        } else {
                            //else, stop refill it
                            changeTriggerState (false, null, 0);

                            return;
                        }
                    }
                }
            } else {
                //apply damage or heal it accordint to the time rate
                if (Time.time > lastTime + damageRate) {
                    if (canDamage) {
                        //if the object inside the trigger is dead, stop applying damage
                        if (applyDamage.checkIfDead (currentHealthElement)) {
                            changeTriggerState (false, null, 0);

                            return;
                        }

                        if (!canGatherHealth) {
                            if (!weaponManager.remainAmmoInClip ()) {
                                changeTriggerState (false, null, 0);

                                return;
                            }
                        }

                        //if the trigger damages
                        //apply damage
                        applyDamage.checkHealth (gameObject, currentHealthElement, damageAmount, Vector3.zero,
                            currentHealthElement.transform.position + currentHealthElement.transform.up, gameObject,
                            true, true, ignoreShield, false, damageCanBeBlocked, canActivateReactionSystemTemporally, damageReactionID, damageTypeID);

                        lastTime = Time.time;

                        if (canGatherHealth) {
                            weaponManager.getAndUpdateAmmo ((int)Mathf.Round (damageAmount));
                        } else {
                            int amountOfAmmo = (int)Mathf.Round (damageAmount);

                            weaponManager.useAmmo (amountOfAmmo);

                            weaponManager.checkToUpdateInventoryWeaponAmmoTextFromWeaponSystem ();
                        }
                    }
                }

                if (canRefillFuel) {
                    if (Time.time > lastTime + fuelRate) {
                        //while the vehicle has not the max fuel amount, then
                        if (applyDamage.getCurrentFuelAmount (currentHealthElement) > 0) {
                            //fill it
                            applyDamage.removeFuel (fuelAmount, currentHealthElement);

                            lastTime = Time.time;

                            if (canGatherFuel) {
                                weaponManager.getAndUpdateAmmo ((int)Mathf.Round (fuelAmount));
                            }
                        } else {
                            //else, stop refill it
                            changeTriggerState (false, null, 0);

                            return;
                        }
                    }
                }

                if (canRefillEnergy) {
                    if (Time.time > lastTime + energyRate) {
                        //while the vehicle has not the max fuel amount, then
                        if (applyDamage.getCurrentEnergyAmount (currentHealthElement) > 0) {
                            //fill it
                            applyDamage.removeEnergy (energyAmount, currentHealthElement);

                            lastTime = Time.time;

                            if (canGatherEnergy) {
                                weaponManager.getAndUpdateAmmo ((int)Mathf.Round (energyAmount));
                            }
                        } else {
                            //else, stop refill it
                            changeTriggerState (false, null, 0);

                            return;
                        }
                    }
                }
            }
        }
    }

    public void changeMode ()
    {
        initializeComponents ();

        healModeActive = !healModeActive;
    }

    public void checkTarget (GameObject target)
    {
        //else, if a vehicle is inside the trigger and it can be used with vehicles, them
        if (applyDamage.isVehicle (target) && useWithVehicles) {
            changeTriggerState (true, target, Time.time);

            return;
        }

        if (applyDamage.isCharacter (target) && useWithCharacters) {
            changeTriggerState (true, target, Time.time);

            return;
        }
    }

    //stop or start the heal or damage action
    void changeTriggerState (bool inside, GameObject obj, float time)
    {
        targetFound = inside;

        currentHealthElement = obj;

        lastTime = time;

        if (showDebugPrint) {
            print ("target found result " + targetFound);
        }
    }

    public void downButtonAction ()
    {
        initializeComponents ();

        searchingTargets = true;

        stopUpdateCoroutine ();

        updateCoroutine = StartCoroutine (updateSystemCoroutine ());
    }

    public void upButtonAction ()
    {
        initializeComponents ();

        searchingTargets = false;

        changeTriggerState (false, null, 0);

        stopUpdateCoroutine ();
    }

    bool componentsInitialized;

    void initializeComponents ()
    {
        if (componentsInitialized) {
            return;
        }

        if (weaponManager != null) {
            mainCameraTransform = weaponManager.getMainCameraTransform ();
        }

        componentsInitialized = true;
    }

    public void setCanHealState (bool state)
    {
        canHeal = state;

        if (state) {

            canDamage = false;

            canRefillEnergy = false;

            canRefillFuel = false;
        }
    }

    public void setCanDamageState (bool state)
    {
        canDamage = state;

        if (state) {
            canHeal = false;

            canRefillEnergy = false;

            canRefillFuel = false;
        }
    }

    public void setCanRefillEnergyState (bool state)
    {
        canRefillEnergy = state;

        if (state) {

            canHeal = false;

            canDamage = false;

            canRefillFuel = false;
        }
    }

    public void setCanRefillFuelState (bool state)
    {
        canRefillFuel = state;

        if (state) {
            canHeal = false;

            canDamage = false;

            canRefillEnergy = false;

        }
    }

    public void setCanGatherHealthState (bool state)
    {
        canGatherHealth = state;
    }

    public void setCanGatherEnergyState (bool state)
    {
        canGatherEnergy = state;
    }

    public void setCanGatherFuelState (bool state)
    {
        canGatherFuel = state;
    }

    public void setHealModeActiveState (bool state)
    {
        healModeActive = state;
    }
}