using System.Collections;
using UnityEngine;

public class Sword : MonoBehaviour, IWeapon
{
    [SerializeField] private GameObject slashAnimPrefab; // Prefab for the slash animation
    [SerializeField] private Transform slashAnimSpawnPoint; // Spawn point for the slash animation
    [SerializeField] private float swordAttackCD = .5f; // Cooldown time between sword attacks
    [SerializeField] private WeaponInfo weaponInfo; // Information about the weapon

    private Transform weaponCollider; // Collider for the weapon
    private Animator myAnimator; // Animator component for controlling animations

    private GameObject slashAnim; // Instance of the slash animation

    private void Awake() {
        myAnimator = GetComponent<Animator>(); // Get the Animator component attached to this GameObject
    }

    private void Start() {
        weaponCollider = PlayerController.Instance.GetWeaponCollider(); // Get the weapon collider from the PlayerController
        slashAnimSpawnPoint = GameObject.Find("SlashSpawnPoint").transform; // Find the spawn point for the slash animation
    }

    private void Update() {
        MouseFollowWithOffset(); // Update weapon rotation to follow the mouse with offset
    }

    public WeaponInfo GetWeaponInfo() {
        return weaponInfo; // Return information about the weapon
    }

    public void Attack() {
        myAnimator.SetTrigger("Attack"); // Trigger the attack animation in the Animator
        weaponCollider.gameObject.SetActive(true); // Activate the weapon collider for attacking
        slashAnim = Instantiate(slashAnimPrefab, slashAnimSpawnPoint.position, Quaternion.identity); // Instantiate the slash animation
        slashAnim.transform.parent = transform.parent; // Set the parent of the slash animation
    }

    // Animation Events //

    public void DoneAttackingAnimEvent() {
        weaponCollider.gameObject.SetActive(false); // Deactivate the weapon collider after attacking animation is done
    }

    public void SwingUpFlipAnimEvent() {
        slashAnim.gameObject.transform.rotation = Quaternion.Euler(-180, 0, 0); // Rotate the slash animation for upward swing

        if (PlayerController.Instance.FacingLeft) { // Flip the slash animation if player is facing left
            slashAnim.GetComponent<SpriteRenderer>().flipX = true;
        }
    }

    public void SwingDownFlipAnimEvent() {
        slashAnim.gameObject.transform.rotation = Quaternion.Euler(0, 0, 0); // Rotate the slash animation for downward swing

        if (PlayerController.Instance.FacingLeft) { // Flip the slash animation if player is facing left
            slashAnim.GetComponent<SpriteRenderer>().flipX = true;
        }
    }

    // Helper Methods //

    private void MouseFollowWithOffset() {
        Vector3 mousePos = Input.mousePosition; // Get the position of the mouse cursor
        Vector3 playerScreenPoint = Camera.main.WorldToScreenPoint(PlayerController.Instance.transform.position); // Get player's position on screen

        float angle = Mathf.Atan2(mousePos.y, mousePos.x) * Mathf.Rad2Deg; // Calculate the angle between player and mouse cursor

        if (mousePos.x < playerScreenPoint.x) { // Adjust weapon rotation based on mouse position relative to player
            transform.rotation = Quaternion.Euler(0, -180, angle); // Rotate weapon when facing left
            weaponCollider.transform.rotation = Quaternion.Euler(0, -180, 0); // Adjust collider rotation for left-facing attack
        } else {
            transform.rotation = Quaternion.Euler(0, 0, angle); // Rotate weapon when facing right
            weaponCollider.transform.rotation = Quaternion.Euler(0, 0, 0); // Adjust collider rotation for right-facing attack
        }
    }
}