using UnityEngine;

namespace MazeGen
{
    /// <summary>
    /// Types of actions a combatant can take during their turn.
    /// </summary>
    public enum ActionType
    {
        Move,       // Move towards/away from target or selected position
        Attack,     // Attack a target (if in range)
        UseItem,    // Use a consumable item (health potion, etc.)
        Defend,     // Brace for impact (future: reduce damage taken)
        Pass        // Do nothing this turn
    }

    /// <summary>
    /// Represents a single action a combatant can take during their turn in combat.
    /// This is decided by the AI (or eventually player input) and then executed by CombatResolver.
    /// </summary>
    public class CombatAction
    {
        /// <summary>ID of the combatant taking this action.</summary>
        public int ActorId { get; set; }

        /// <summary>Type of action being taken.</summary>
        public ActionType ActionType { get; set; }

        /// <summary>Target combatant (for Attack, Defend). Null for Move/UseItem/Pass.</summary>
        public Combatant TargetCombatant { get; set; }

        /// <summary>Target grid position (for Move actions). Zero for other action types.</summary>
        public Vector2Int TargetPosition { get; set; }

        /// <summary>Item to use (for UseItem actions). Null for other action types.</summary>
        public Consumable TargetItem { get; set; }

        public CombatAction()
        {
            ActorId = -1;
            ActionType = ActionType.Pass;
            TargetCombatant = null;
            TargetPosition = Vector2Int.zero;
            TargetItem = null;
        }

        public CombatAction(int actorId, ActionType actionType)
        {
            ActorId = actorId;
            ActionType = actionType;
            TargetCombatant = null;
            TargetPosition = Vector2Int.zero;
            TargetItem = null;
        }

        public CombatAction(int actorId, Combatant targetCombatant)
        {
            ActorId = actorId;
            ActionType = ActionType.Attack;
            TargetCombatant = targetCombatant;
            TargetPosition = Vector2Int.zero;
            TargetItem = null;
        }

        public CombatAction(int actorId, Vector2Int targetPosition)
        {
            ActorId = actorId;
            ActionType = ActionType.Move;
            TargetCombatant = null;
            TargetPosition = targetPosition;
            TargetItem = null;
        }

        public override string ToString()
        {
            return ActionType switch
            {
                ActionType.Move => $"Move to {TargetPosition}",
                ActionType.Attack => $"Attack {TargetCombatant?.Name ?? "null"}",
                ActionType.UseItem => $"Use {TargetItem?.ItemName ?? "null"}",
                ActionType.Defend => "Defend",
                ActionType.Pass => "Pass",
                _ => "Unknown action"
            };
        }
    }
}