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

public class RBPuppetController : MonoBehaviour
{

    [SerializeField] private float RunSpeed = 4;
    [SerializeField] private float walkSpeed = 4;
    [SerializeField] private float gravity = -12;
    [SerializeField] private float jumpHeight = 1;

    [SerializeField] private float turnSmoothTime = 0.2f;
    [SerializeField] private float turnSmoothVelocity;
    [SerializeField] private float speedSmoothTime = 0.1f;
    [SerializeField] private float speedSmoothVelocity;


    [SerializeField] private bool lockCursor;

    float velocityY;
    float currentSpeed;

    Transform cameraT;
    Animator animator;
    CharacterController controller;

    // Start is called before the first frame update
    void Start()
    {
        cameraT = Camera.main.transform;
        animator = GetComponent<Animator>();
        controller = GetComponent<CharacterController>();

        if (lockCursor)
        {
            Cursor.lockState = CursorLockMode.Locked;
            Cursor.visible = false;
         }
    }

    // Update is called once per frame
    void Update()
    {
        //inputAssignments --- Is it wiser to call buttons within Update to execute functions rather than within the functions themselves?
        Vector2 input = new Vector2(Input.GetAxisRaw("Horizontal"), Input.GetAxisRaw("Vertical"));
        Vector2 inputDir = input.normalized;
        bool running = Input.GetButton("Sprint");

        PlayerMovement(inputDir, running);

        if (Input.GetButton("Jump"))
        {

            Jump();


        }
        //Animation Control
        float animationSpeedPercent = ((running) ? currentSpeed / RunSpeed : currentSpeed / walkSpeed);
        animator.SetFloat("RunBlendSpeed", animationSpeedPercent, speedSmoothTime, Time.deltaTime);
    }

    void PlayerMovement(Vector2 inputDir, bool running)
    {

        if (inputDir != Vector2.zero)
        {
            //Calculates the character rotation using the magic, of TRIG
            float targetRotation = Mathf.Atan2(inputDir.x, inputDir.y) * Mathf.Rad2Deg + cameraT.eulerAngles.y;
            transform.eulerAngles = Vector3.up * Mathf.SmoothDampAngle(transform.eulerAngles.y, targetRotation, ref turnSmoothVelocity, turnSmoothTime);

        }


        float targetSpeed = ((running) ? walkSpeed : RunSpeed) * inputDir.magnitude;
        currentSpeed = Mathf.SmoothDamp(currentSpeed, targetSpeed, ref speedSmoothVelocity, speedSmoothTime);

        velocityY = Time.deltaTime * gravity;
        Vector3 velocity = transform.forward * currentSpeed + Vector3.up * velocityY;

        controller.Move(velocity * Time.deltaTime);
        currentSpeed = new Vector2(controller.velocity.x, controller.velocity.z).magnitude;

        if (controller.isGrounded)
        {
            velocityY = 0;
        }


    }


    void Jump()
    {

        if (controller.isGrounded)
        {
            float jumpVelocity = Mathf.Sqrt(-2 * gravity * jumpHeight);
            velocityY = jumpVelocity;

        }


    }
}