using System.Collections;
using UnityEngine;

public class Sword : MonoBehaviour, IWeapon
{
    [SerializeField] private GameObject slashAnimPrefab; // Slash animation prefab
    [SerializeField] private Transform slashAnimSpawnPoint; // Spawn location for the slash animation
    [SerializeField] private float swordAttackCD = .5f; // Cooldown duration between sword attacks
    [SerializeField] private WeaponInfo weaponInfo; // Details about this weapon

    private Transform weaponCollider; // Collider associated with the weapon
    private Animator myAnimator; // Animator component for handling animations

    private GameObject slashAnim; // Instance of the slash animation

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

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

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

    public WeaponInfo GetWeaponInfo() {
        return weaponInfo; // Provide the weapon's information
    }

    public void Attack() {
        myAnimator.SetTrigger("Attack"); // Trigger the sword's attack animation
        weaponCollider.gameObject.SetActive(true); // Enable the weapon collider to register hits
        slashAnim = Instantiate(slashAnimPrefab, slashAnimSpawnPoint.position, Quaternion.identity); // Spawn the slash animation
        slashAnim.transform.parent = transform.parent; // Set the slash animation's parent to maintain its position relative to the player
    }

    // Animation Events //

    public void DoneAttackingAnimEvent() {
        weaponCollider.gameObject.SetActive(false); // Disable the weapon collider after the attack animation is complete
    }

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

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

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

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

    // Helper Methods //

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

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

        if (mousePos.x < playerScreenPoint.x) { // If the mouse is to the left of the player
            transform.rotation = Quaternion.Euler(0, -180, angle); // Rotate the weapon to the left
            weaponCollider.transform.rotation = Quaternion.Euler(0, -180, 0); // Adjust the collider's rotation for a left-facing attack
        } else {
            transform.rotation = Quaternion.Euler(0, 0, angle); // Rotate the weapon to the right
            weaponCollider.transform.rotation = Quaternion.Euler(0, 0, 0); // Adjust the collider's rotation for a right-facing attack
        }
    }
}