using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Experimental.Rendering.Universal;
using UnityEngine.InputSystem;

public class PlayerController : MonoBehaviour
{
    public Light2D nuzzleFlash;
    
    private Rigidbody2D rb;
    private SpriteRenderer sr;
    private Camera main;
    
    
    //Input
    private PlayerInput input;
    private InputAction moveAction;
    private InputAction fightAction;
    
    private Vector2 moveDirection;
    private float moveSpeed = 5f;
    
    //Shooting
    public GameObject bulletPrefab;
    private bool isShooting = false;
    private float lastShot = 0f;
    private float shootSpeed = 0.25f;


    // Start is called before the first frame update
    private void Awake()
    {
        rb = this.gameObject.GetComponent<Rigidbody2D>();
        input = this.gameObject.GetComponent<PlayerInput>();
        moveAction = input.actions["Move"];
        fightAction = input.actions["Fight"];
        
        //Input events
        moveAction.performed += ctx => Move(ctx.ReadValue<Vector2>());
        moveAction.canceled += ctx => Move(Vector2.zero);
        
        fightAction.performed += ctx => Fight();
        fightAction.canceled += ctx => Fight(true);
        
        main = Camera.main;
    }

    private void FixedUpdate()
    {   
        //Update move direction
        rb.MovePosition(rb.position + moveDirection * moveSpeed * Time.fixedDeltaTime);
    }

    private void Update()
    {
        //Update the sprite direction based on mouse position
        Vector2 mousePos = main.ScreenToWorldPoint(Mouse.current.position.ReadValue());
        Vector2 direction = mousePos - (Vector2)transform.position;
        float angle = Mathf.Atan2(direction.y, direction.x) * Mathf.Rad2Deg;
        transform.rotation = Quaternion.AngleAxis(angle, Vector3.forward);
        
        //shooting
        if(isShooting && Time.time - lastShot > shootSpeed)
        {
            lastShot = Time.time;
            Instantiate(bulletPrefab, transform.position, transform.rotation);
            nuzzleFlash.intensity = 2f;
            Invoke(nameof(disableNuzzleFlash), 0.025f);
            
        }
    }

    //update the move direction
    void Move(Vector2 direction) => moveDirection = direction;
    
    //Shoot
    void Fight(bool stop = false)
    {
        isShooting = !stop;
    }
    void disableNuzzleFlash()
    {
        nuzzleFlash.intensity = 0f;
    }
}