using UnityEngine;

using Colosseum.Combat;
using Colosseum.Player;
using Colosseum.Stats;
using Colosseum.Weapons;

namespace Colosseum.Skills.Effects
{
    /// <summary>
    /// 피격 제어 상태에 따라 추가 피해를 줄 수 있는 대미지 효과입니다.
    /// 현재는 다운 상태인 대상에게 추가 배율을 적용합니다.
    /// </summary>
    [CreateAssetMenu(fileName = "HitReactionDamageEffect", menuName = "Colosseum/Skills/Effects/HitReaction Damage")]
    public class HitReactionDamageEffect : SkillEffect
    {
        [Header("Damage Settings")]
        [Min(0f)] [SerializeField] private float baseDamage = 10f;
        [SerializeField] private DamageType damageType = DamageType.Physical;
        [Tooltip("스탯 계수 (1.0 = 100%)")]
        [Min(0f)] [SerializeField] private float statScaling = 1f;

        [Header("Hit Reaction Bonus")]
        [Tooltip("다운 상태인 대상에게 추가 배율을 적용할지 여부")]
        [SerializeField] private bool bonusAgainstDownedTarget = true;

        [Tooltip("다운 상태 대상에게 적용되는 추가 피해 배율")]
        [Min(1f)] [SerializeField] private float downedDamageMultiplier = 1.5f;

        protected override void ApplyEffect(GameObject caster, GameObject target)
        {
            if (target == null)
                return;

            IDamageable damageable = target.GetComponent<IDamageable>();
            if (damageable == null)
                return;

            float totalDamage = CalculateDamage(caster);

            HitReactionController hitReactionController = target.GetComponent<HitReactionController>();
            if (hitReactionController == null)
                hitReactionController = target.GetComponentInParent<HitReactionController>();

            if (bonusAgainstDownedTarget
                && hitReactionController != null
                && hitReactionController.IsDowned)
            {
                totalDamage *= downedDamageMultiplier;
            }

            damageable.TakeDamage(totalDamage, caster);
        }

        /// <summary>
        /// 시전자 스탯 기반 대미지 계산
        /// 공식: baseDamage + (statDamage * scaling)
        /// </summary>
        private float CalculateDamage(GameObject caster)
        {
            if (damageType == DamageType.True)
            {
                return baseDamage;
            }

            CharacterStats stats = caster != null ? caster.GetComponent<CharacterStats>() : null;
            if (stats == null)
            {
                return baseDamage;
            }

            float statDamage = damageType switch
            {
                DamageType.Physical => stats.PhysicalDamage,
                DamageType.Magical => stats.MagicDamage,
                DamageType.Ranged => stats.Dexterity.FinalValue * 2f,
                _ => 0f,
            };

            float baseTotal = baseDamage + (statDamage * statScaling);
            return baseTotal * GetDamageMultiplier(caster);
        }

        /// <summary>
        /// 시전자의 무기 데미지 배율 조회
        /// </summary>
        private float GetDamageMultiplier(GameObject caster)
        {
            WeaponEquipment weaponEquipment = caster != null ? caster.GetComponent<WeaponEquipment>() : null;
            return weaponEquipment != null ? weaponEquipment.DamageMultiplier : 1f;
        }
    }
}