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

public class PlayerController : MonoBehaviour
{
    public float groundCheckDistance = 0.1f;
    public float gravity;
    public float maxGravityVelocity= 0.01f;
    public Vector3 velocity = Vector3.zero;
    public Vector3 speed;
    public Vector3 maxVelocity;
    public float friction = 0.1f;
    void Start()
    {
        CameraFollower.Target=transform;
    }

    float input =0;
    void Update(){
        input = Input.GetAxis("Horizontal");
    }
    void FixedUpdate()
    {
        Gravity();
        HandleInput();
        transform.eulerAngles = Vector3.zero + new Vector3(0,0, (-velocity.x / maxVelocity.x) * 10);
        transform.position += velocity;
    }

    void HandleInput(){
        if(input >0){
            velocity = new Vector3(Mathf.Clamp(velocity.x + speed.x, -maxVelocity.x, maxVelocity.x), Mathf.Clamp(velocity.y + speed.y, -maxVelocity.y, maxVelocity.y));
        }else if(input < 0){
            velocity = new Vector3(Mathf.Clamp(velocity.x - speed.x, -maxVelocity.x, maxVelocity.x), Mathf.Clamp(velocity.y + speed.y, -maxVelocity.y, maxVelocity.y));
        }else{
            velocity = Vector3.Lerp(velocity, new Vector3(0, (velocity.y > 0) ? 0 : velocity.y),friction);
        }
    }


    void Gravity(){
        RaycastHit2D groundHit = Physics2D.Linecast(transform.position, transform.position - new Vector3(0,groundCheckDistance,0));
        if(groundHit.collider != null){
            Debug.DrawLine(transform.position, groundHit.point, Color.green);
            float dist = transform.position.y - groundHit.point.y;
            velocity = new Vector3(velocity.x,groundCheckDistance - dist,velocity.z);
        }else{
            velocity = new Vector3(velocity.x,Mathf.Lerp(velocity.y, -maxGravityVelocity,gravity),velocity.z);
        }
    }
}