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

public class AbilitySystem : MonoBehaviour
{
    [Header("Assigned Abilities")]
    public List<Ability> abilities = new List<Ability>();

    private Ability activeAbility; // Tracks the currently active ability in "spawn mode"
    private bool isAbilityActive = false;

    private HashSet<Ability> abilitiesOnCooldown = new HashSet<Ability>();

    void Update()
    {
        if (isAbilityActive && Input.GetMouseButtonDown(0))
        {
            UseActiveAbility();
        }
    }

    /// <summary>
    /// Activates an ability by its keybind.
    /// </summary>
    public void ActivateAbilityByKey(string key)
    {
        foreach (var ability in abilities)
        {
            if (ability.abilityKey == key)
            {
                if (!abilitiesOnCooldown.Contains(ability))
                {
                    ToggleAbilityMode(ability);
                }
                else
                {
                    Debug.Log($"{ability.abilityName} is on cooldown.");
                }
                return;
            }
        }
        Debug.LogWarning($"No ability assigned to key {key}.");
    }

    private void ToggleAbilityMode(Ability ability)
    {
        if (isAbilityActive && activeAbility == ability)
        {
            DeactivateAbilityMode();
        }
        else
        {
            ActivateAbilityMode(ability);
        }
    }

    private void ActivateAbilityMode(Ability ability)
    {
        isAbilityActive = true;
        activeAbility = ability;
        Debug.Log($"Ability {ability.abilityName} activated! Click to use.");
    }

    private void DeactivateAbilityMode()
    {
        isAbilityActive = false;
        activeAbility = null;
        Debug.Log("Ability mode deactivated.");
    }

    private void UseActiveAbility()
    {
        if (activeAbility != null)
        {
            activeAbility.ActivateAbility(gameObject);
            StartCoroutine(StartCooldown(activeAbility));
            DeactivateAbilityMode();
        }
    }

    /// <summary>
    /// Starts the cooldown coroutine for the ability.
    /// </summary>
    private IEnumerator StartCooldown(Ability ability)
    {
        abilitiesOnCooldown.Add(ability);
        Debug.Log($"{ability.abilityName} is now on cooldown for {ability.cooldownTime} seconds.");

        yield return new WaitForSeconds(ability.cooldownTime);

        abilitiesOnCooldown.Remove(ability);
        Debug.Log($"{ability.abilityName} is off cooldown.");
    }
}