using System.Linq;

namespace MazeGen
{
    /// <summary>
    /// Decides to use a health potion if the agent's health is low.
    /// Only executes when outside of combat and health is below 50%.
    /// </summary>
    public class UseHealthPotionDecision : AgentDecision
    {
        private const float LowHealthThreshold = 0.5f;

        public override string DecisionName => "Use Health Potion";

        public override bool CanExecute(MazeAgent agent)
        {
            if (agent == null || agent.IsEngaged) return false; // Can't use potions while fighting

            CharacterSheet sheet = agent.CharacterSheet;
            float healthPercent = sheet.Stats.MaxHealth > 0 ? sheet.Stats.CurrentHealth / sheet.Stats.MaxHealth : 1f;

            if (healthPercent >= LowHealthThreshold) return false; // Health is fine

            // Check if we have a potion available (peek without consuming)
            return sheet.Inventory.Any(i => i is Consumable c && c.HealthBonus > 0);
        }

        public override bool Execute(MazeAgent agent)
        {
            CharacterSheet sheet = agent.CharacterSheet;
            Consumable potion = sheet.GetHealthPotionFromInventory();
            if (potion != null && potion.HealthBonus > 0)
            {
                sheet.Stats.Heal(potion.HealthBonus);
                return true;
            }
            return false;
        }

        public override void Think(MazeAgent agent)
        {
            CharacterSheet sheet = agent.CharacterSheet;
            // The potion was consumed in Execute, so we narrate the result
            agent.Thoughts.Add(ThoughtKind.Peek,
                $"Used health potion, recovered HP (now {sheet.Stats.CurrentHealth:0.#}/{sheet.Stats.MaxHealth:0.#})");
        }
    }
}