using UnityEngine;
using Ashwild.Inventory;

namespace Ashwild.Player
{
    /// <summary>
    /// Held-item logic for the build hammer, placed on its hand prefab. While equipped it
    /// listens to the secondary-use input (right-click) and asks the construction UI to
    /// open/close through the bus — it never reaches for the menu itself, so the hammer
    /// stays a pure input source and the UI owns its own state. Left-click placement will
    /// be added on top of this once the build menu exists.
    /// </summary>
    [DisallowMultipleComponent]
    public class BuildHammerBehaviour : MonoBehaviour, IHeldItemBehaviour
    {
        #region Serialized Fields

        [Header("Cooldown")]
        /// <summary>
        /// Minimum time, in seconds, between two menu toggles so a held right-click
        /// does not flicker the menu open and shut.
        /// </summary>
        [SerializeField] private float toggleCooldown = 0.25f;

        #endregion

        #region State

        /// <summary>
        /// Earliest time, in seconds, the next menu toggle is allowed.
        /// </summary>
        private float nextToggleTime;

        #endregion

        #region Unity Lifecycle

        /// <summary>
        /// Subscribes to the secondary-use input for as long as the hammer is held.
        /// </summary>
        private void OnEnable()
        {
            PlayerEvents.SecondaryUsePressed += HandleSecondaryUse;
        }

        /// <summary>
        /// Unsubscribes when the hammer is put away (the prefab is destroyed).
        /// </summary>
        private void OnDisable()
        {
            PlayerEvents.SecondaryUsePressed -= HandleSecondaryUse;
        }

        #endregion

        #region IHeldItemBehaviour

        /// <summary>
        /// Nothing to link yet: toggling the menu needs no player refs. Present to satisfy
        /// the held-item contract; placement logic added later will use the context.
        /// </summary>
        public void Setup(HeldItemContext context, ItemData item)
        {
        }

        #endregion

        #region Event Handlers

        /// <summary>
        /// Requests the construction menu to open/close on right-click, gated by lock and
        /// cooldown. The UI decides whether that opens or closes it.
        /// </summary>
        private void HandleSecondaryUse()
        {
            if (PlayerEvents.InputLocked) return;
            if (Time.time < nextToggleTime) return;

            nextToggleTime = Time.time + toggleCooldown;
            PlayerEvents.RaiseBuildMenuToggleRequested();
        }

        #endregion
    }
}