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

public class Character : MonoBehaviour
{
    [Header("Movement")]
    public float moveSpeed = 2f;
    public float groundDrag = 1f;

    private float horizontalInput, verticalInput;
    private Vector3 moveDirection;
    private Rigidbody rb;

    public float speed = 2f;

    [Header("Turning")]
    public float turningRate = 30f;
    public Quaternion _targetRotation = Quaternion.identity;

    [Header("Keybindings")]
    public KeyCode jumpKey = KeyCode.Space;

    public float jumpForce;
    public float jumpCooldown;
    bool readyToJump = true;

    [Header("Groud Check")]
    public float playerHeight;
    public LayerMask whatIsGround;
    public bool grounded;

    // Start is called before the first frame update
    void Start()
    {
        rb = gameObject.GetComponent<Rigidbody>();
    }

    // Update is called once per frame
    void Update()
    {
        grounded = Physics.Raycast(transform.position, Vector3.down, playerHeight * 0.5f + 0.2f, whatIsGround);

        MyInput();
        SpeedControl();

        transform.rotation = Quaternion.RotateTowards(transform.rotation, _targetRotation, turningRate * Time.deltaTime);

        if (grounded)
        {
            rb.drag = groundDrag;
        }
        else
        {
            rb.drag = 0.3f;
        }

    }

    private void FixedUpdate()
    {
        MovePlayer();
    }

    private void MyInput()
    {
        horizontalInput = Input.GetAxisRaw("Horizontal");
        verticalInput = Input.GetAxisRaw("Vertical");

        if(horizontalInput != 0f || verticalInput != 0f)
        {
            _targetRotation = Quaternion.Euler(new Vector3(0f, Mathf.Atan2(horizontalInput, verticalInput) * Mathf.Rad2Deg, 0f));
        }
        
        if (Input.GetKey(jumpKey) && readyToJump && grounded)
        {
            readyToJump = false;

            Jump();

            Invoke(nameof(ResetJump), jumpCooldown);
        }

    }

    private void MovePlayer()
    {
        moveDirection = new Vector3(0, 0, verticalInput) + new Vector3(horizontalInput, 0, 0);

        rb.AddForce(moveDirection.normalized * moveSpeed * 10f, ForceMode.Force);
    }

    private void SpeedControl()
    {
        Vector3 flatVel = new Vector3(rb.velocity.x, 0f, rb.velocity.z);

        if (flatVel.magnitude > moveSpeed)
        {
            Vector3 limitedVel = flatVel.normalized * moveSpeed;
            rb.velocity = new Vector3(limitedVel.x, rb.velocity.y, limitedVel.z);
        }
    }

    private void Jump()
    {
        rb.velocity = new Vector3(rb.velocity.x, 0f, rb.velocity.z);

        rb.AddForce(transform.up * jumpForce, ForceMode.Impulse);
    }

    private void ResetJump()
    {
        readyToJump = true;
    }
}