Rimor_GrapplingHook

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

public class GrapplingHook : MonoBehaviour
{
    [Header("References")]
    public LayerMask whatIsGrappleAble;
    public MovementController playerMovementController;
    public Rigidbody2D playerBody;
    public DistanceJoint2D joint;
    public LineRenderer aimLine;
    public LineRenderer ropeLine;
    public Grapple grapple;

    [Header("Parameters")]
    public float maxRange = 25f;

    [Header("Charges")]
    public int maxCharges;
    int currentCharges;
    public float chargeTime;
    float chargeTick;
    public ManaOrb manaOrb;

    [Header("Info")]
    public bool isGrappled = false;
    public bool isFired = false;

    Vector2 aimDirection;

    [Header("SFX")]
    public AudioClip fireSound;
    public AudioClip attachSound;
    public AudioClip retractSound;
    public AudioClip rechargeSound;
    public AudioClip falseFireSound;

    // Start is called before the first frame update
    void Start()
    {
        grapple.transform.SetParent(null);
        aimLine.positionCount = 2;
        ropeLine.positionCount = 2;
        joint.enabled = false;

        currentCharges = maxCharges;
    }

    // Update is called once per frame
    void Update()
    {
        aimDirection = ((Vector2)(Camera.main.ScreenToWorldPoint(Input.mousePosition) - transform.position)).normalized;

        AimLineUpdate();
        RopeLineUpdate();

        if(Input.GetButtonDown("Fire1"))
        {
            if (currentCharges > 0) FireGrapple();
            else ExtensionMethods.PlayAudio(falseFireSound, 1.0f, Random.Range(0.8f, 1.2f));
        }
        if(Input.GetButtonUp("Fire1"))
        {
            UnGrapple();
        }

        // Check if grapple out of range
        if(!isGrappled && grapple.gameObject.activeSelf)
        {
            float distance = Vector2.Distance(transform.position, grapple.transform.position);
            if(distance >= maxRange)
            {
                UnGrapple();
            }
        }

        if (!isGrappled && !grapple.gameObject.activeSelf)
        {
            Charge();
        }

        if (currentCharges == 0) manaOrb.Deactivate();
        else manaOrb.Activate();
    }

    void Charge()
    {
        if(currentCharges < maxCharges)
        {
            chargeTick += Time.deltaTime;
            if (playerMovementController.isGrounded) chargeTick += Time.deltaTime * 3.0f;
            if(chargeTick >= chargeTime)
            {
                chargeTick -= chargeTime;
                currentCharges++;
                ExtensionMethods.PlayAudio(rechargeSound, 1.5f, Random.Range(0.8f, 1.2f));
            }
        }
    }

    void FireGrapple()
    {
        // Deplete a Grapple Charge
        currentCharges--; // Deplete graple charge

        isFired = true;
        ExtensionMethods.PlayAudio(fireSound, 1.0f, Random.Range(0.8f, 1.2f));
        grapple.transform.SetParent(null);
        grapple.gameObject.SetActive(true);
        grapple.rb.isKinematic = false;
        grapple.collider.isTrigger = false;
        grapple.transform.position = transform.position;
        grapple.rb.position = transform.position;
        grapple.rb.velocity = aimDirection * 100f;
    }

    public void UnGrapple()
    {
        if (!isGrappled && !isFired) return;

        grapple.attachedTo = null;

        // If the grapple whiffed.
        if(isFired && !isGrappled)
        {
            // Forgive the player with some grapple recharge
            chargeTick += chargeTime * 0.75f;
            if (chargeTick > chargeTime) chargeTick = chargeTime;
        }

        ExtensionMethods.PlayAudio(retractSound, 1.0f, Random.Range(0.8f, 1.2f));
        isGrappled = false;
        isFired = false;
        joint.enabled = false;
        grapple.gameObject.SetActive(false);
    }

    public void Grappled()
    {
        AudioSource audioSource = ExtensionMethods.PlayAudio(attachSound, 1.0f, Random.Range(0.8f, 1.2f), grapple.transform.position, ExtensionMethods.DEFAULT_AUDIO_RANGE);
        audioSource.spatialBlend = 0.95f;
        Debug.Log("Grappled");
        isGrappled = true;
        joint.enabled = true;
        joint.distance = ((Vector2)(grapple.transform.position - transform.position)).magnitude;
        if (joint.distance < 0.5f) joint.distance = 0.5f;

        // Adjust player velocity so they are not suddenly stopped on a grapple
        // Did we grapple to a static object?
        if (joint.connectedBody == grapple.rb)
        {
            Vector2 grappleDirection = grapple.transform.position - transform.position;
            Vector2 velTowardsGrapple = Vector3.Project(playerBody.velocity, grappleDirection);
            Debug.Log(grappleDirection);
            Debug.Log(velTowardsGrapple);
            playerBody.velocity -= velTowardsGrapple * 0.5f;
            playerBody.velocity += playerBody.velocity.normalized * velTowardsGrapple.magnitude * 0.25f; // Re-add removed velocity in appropriate direction
        }
    }

    void AimLineUpdate()
    {
        aimLine.SetPosition(0, transform.position);
        Vector3 position2 = 3f * aimDirection;
        position2.z = transform.position.z;
        aimLine.SetPosition(1, transform.position + position2);
    }

    void RopeLineUpdate()
    {
        if (grapple.gameObject.activeSelf)
        {
            ropeLine.enabled = true;
            ropeLine.SetPosition(0, transform.position);
            ropeLine.SetPosition(1, grapple.transform.position);
        }
        else
        {
            ropeLine.enabled = false;
        }
    }
}