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

public class PlayerMovement : MonoBehaviour
{
    private CharacterController controller;
    private Vector3 playerVelocity;
    private bool IsGrounded;
    public float speed = 5f;
    public float gravity = -9.8f;
    public float jumpHeight = 3f;
    private bool lerpCrouch;
    private bool crouching;
    private bool isSprinting;

    private bool lockCursor = true;

    public float crouchTimer = 1f;

    public Camera myCam;
    public float walkFOV = 60f;
    public float runFOV = 120f;

    // Start is called before the first frame update
    void Start()
    {
        if (lockCursor)
        {
            Cursor.lockState = CursorLockMode.Locked;
            Cursor.visible = false;
        }
        controller = GetComponent<CharacterController>();

        myCam.fieldOfView = walkFOV;
    }

    // Update is called once per frame
    void Update()
    {
        IsGrounded = controller.isGrounded;


        if (lerpCrouch)
        {
            crouchTimer += Time.deltaTime;
            float p = crouchTimer / 1;
            p *= p;
            if (crouching)
                controller.height = Mathf.Lerp(controller.height, 1, p);
            else
                controller.height = Mathf.Lerp(controller.height, 2, p);

            if(p > 1)
            {
                lerpCrouch = false;
                crouchTimer = 0f;
            }

        }

    }
    // receive inputs for out inputmanager and apply them to the character controller
    public void ProcessMove(Vector2 input)
    {
        Vector3 moveDirection = Vector3.zero;
        moveDirection.x = input.x;
        moveDirection.z = input.y;
        controller.Move(transform.TransformDirection(moveDirection) * speed * Time.deltaTime);
        playerVelocity.y += gravity * Time.deltaTime;
        if (IsGrounded && playerVelocity.y < 0)
            playerVelocity.y = -2f;
        controller.Move(playerVelocity * Time.deltaTime);
        //Debug.Log(playerVelocity.y);
    }

    public void Jump()
    {
        if (IsGrounded)
        {
            playerVelocity.y = Mathf.Sqrt(jumpHeight * -3.0f * gravity);
        }
    }

    public void Crouch()
    {
        crouching = !crouching;
        crouchTimer = 0;
        lerpCrouch = true;
        if (crouching)
            speed = 3;
        else
            speed = 5;

    }

    public void ToggleSprint()
    {
        isSprinting = !isSprinting;

        myCam.fieldOfView = isSprinting ? runFOV : walkFOV;
    }

}