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

public class CannonScript : MonoBehaviour
{
    [SerializeField] private GameObject cannon;
    [SerializeField] private GameObject projectile;
    [SerializeField] private float lookDepth;
    [SerializeField] private float cannonForce;
    private Vector3 lookDir;
    // Start is called before the first frame update
    void Start()
    {
        lookDir = Vector3.zero;
    }

    // Update is called once per frame
    void Update()
    {
        
    }

    private Vector3 GetMouseWorldPosition(){
        Vector3 screenPos = Mouse.current.position.ReadValue();
        screenPos.z = lookDepth;
        Vector3 worldPoint = Camera.main.ScreenToWorldPoint(screenPos);

        return worldPoint;
    }

    public void OnLook(InputAction.CallbackContext ctx){
        Vector3 bodyLookPos= GetMouseWorldPosition(), cannonLookPos = GetMouseWorldPosition();
        bodyLookPos.y = 0;
        gameObject.transform.LookAt(bodyLookPos);
        cannon.transform.LookAt(cannonLookPos);
        lookDir = (cannonLookPos - transform.position).normalized;
    }

    public void OnFire(InputAction.CallbackContext ctx){
        if(ctx.performed){
            GameObject proj = Instantiate(projectile, transform.position, cannon.transform.rotation);
            proj.GetComponent<Rigidbody>().AddForce(cannonForce * lookDir, ForceMode.Impulse);
        }
        
    }
}