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

public class Ball : MonoBehaviour
{
    private float speed = 15;
    public string winner = "";
    protected int playerOneScore, playerTwoScore = 0;

    /// <summary>
    /// responsible for calc 
    /// the ball hit dir
    /// </summary>
    /// <returns>the ball position</returns>
    protected float hitFactor(Vector2 ballPos, Vector2 racketPos, float racketHeight)
    {
        return (ballPos.y - racketPos.y) / racketHeight;
    }

    /// <summary>
    /// responsible for ball reaction
    /// depending on the gameobj hit
    /// </summary>
    protected void BallReaction(Collision2D col, int x)
    {
        float y = hitFactor(transform.position,
                                col.transform.position,
                                col.collider.bounds.size.y);
        Vector2 dir = new Vector2(x, y).normalized;
        GetComponent<Rigidbody2D>().velocity = dir * speed;
    }

    /// <summary>
    /// 
    /// </summary>
    /// <param name="col"></param>
    /// <param name="winner"></param>
    /// <param name="side"></param>
    protected void WinAction(Collision2D col, string winner, Vector2 side)
    {
        Debug.Log("The goal is scored by " + winner);
        Debug.Log(playerOneScore + ":" + playerTwoScore);
        GetComponent<Rigidbody2D>().velocity = side * speed;
    }

    // Start is called before the first frame update
    void Start()
    {
        GetComponent<Rigidbody2D>().velocity = Vector2.right * speed;
    }

    private void Update()
    {
    }

    /// <summary>
    /// Changes the pos of the ball 
    /// when hit the racket
    /// </summary>
    void OnCollisionEnter2D(Collision2D col)
    {
        string objName = col.gameObject.name;

        switch (objName)
        {
            case "Racket_Left":
                BallReaction(col, 1);
                break;
            case "Racket_Right":
                BallReaction(col, -1);
                break;
            case "Wall_Left":
                winner = "Player 2";
                playerTwoScore++;
                Vector2 right = Vector2.right;
                WinAction(col, winner, right);
                break;
            case "Wall_Right":
                winner = "Player 1";
                playerOneScore++;
                Vector2 left = Vector2.left;
                WinAction(col, winner, left);
                break;

            default: break;

        }
    }
}