using Cielonos.MainGame.Characters;
using UnityEngine;

namespace Cielonos.MainGame.Inventory.Collections
{
    /// <summary>
    /// 激情系统配套被动装备
    /// - 提供与激情系统等级相关的属性加成。
    /// - 加成效果根据激情等级逐级递增，最高可达 SSS 级别。
    /// 具体效果如下：
    /// - C级：+8 能量回复，+0 攻击获得能量，0% 攻击速度，0% 暴击率，0% 受到的最终伤害倍率
    /// - B级：+4 能量回复，+0 攻击获得能量，1% 攻击速度，2% 暴击率，0% 受到的最终伤害倍率
    /// - A级：+2 能量回复，+0 攻击获得能量，2% 攻击速度，4% 暴击率，0% 受到的最终伤害倍率
    /// - S级：+1 能量回复，+1 攻击获得能量，3% 攻击速度，6% 暴击率，5% 受到的最终伤害倍率
    /// - SS级：+1 能量回复，+1 攻击获得能量，4% 攻击速度，8% 暴击率，10% 受到的最终伤害倍率
    /// - SSS级：+1 能量回复，+1 攻击获得能量，5% 攻击速度，10% 暴击率，20% 受到的最终伤害倍率
    /// </summary>
    public partial class Passion : PassiveEquipmentBase
    {
        private PassionSystem _passionSystem;

        private int PassionLevel => _passionSystem.LevelIndex;

        public override void Initialize()
        {
            base.Initialize();
            _passionSystem = CombatManager.GetCombatSystem<PassionSystem>();
            passiveAttributeSm = new AttributeSubmodule(this, passiveAttributeData);
        }

        public override void OnObtained()
        {
            base.OnObtained();
            _passionSystem.OnLevelChanged += Refresh;
            UpdateAttributes();
            passiveAttributeSm.RefreshAllModifiedAttributes();
        }

        public override void OnDiscarded()
        {
            base.OnDiscarded();
            _passionSystem.OnLevelChanged -= Refresh;
        }

        private void Refresh(int oldLevel, int newLevel)
        {
            UpdateAttributes();
            passiveAttributeSm.RefreshAllModifiedAttributes();
        }

        private void UpdateAttributes()
        {
            passiveAttributeSm.charAttrNumericChange[CharacterAttribute.EnergyRegeneration] = GetEnergyRegen();
            passiveAttributeSm.chaAttrPercentageChangeOfAccumulation[CharacterAttribute.AttackSpeed] = GetAttackSpeed();
            passiveAttributeSm.charAttrNumericChange[CharacterAttribute.CriticalAttackProbability] = GetCriticalAttackProbability();
            passiveAttributeSm.chaAttrPercentageChangeOfMultiplication[CharacterAttribute.FinalDamageReceivedMultiplier] = GetFinalDamageReceivedMultiplier();
        }
    }

    public partial class Passion
    {
        private float GetEnergyRegen()
        {
            return PassionLevel switch
            {
                0 => 8.0f, // C-Rank
                1 => 4.0f, // B-Rank
                2 => 2.0f, // A-Rank
                _ => 1.0f  // S, SS, SSS (Ranks 3, 4, 5)
            };
        }
        
        private float GetEnergyGainByAttack()
        {
            if (PassionLevel < 3) return 0f; // C, B, A ranks have no extra energy gain
            return 1f; // S, SS, SSS ranks provide +1 energy gain on attack
        }

        private float GetAttackSpeed()
        {
            return PassionLevel * 0.01f;
        }
        
        private float GetCriticalAttackProbability()
        {
            return PassionLevel * 0.02f;
        }

        private float GetFinalDamageReceivedMultiplier()
        {
            return PassionLevel switch
            {
                3 => 1.05f, // S-Rank (LevelIndex 3)
                4 => 1.10f, // SS-Rank (LevelIndex 4)
                5 => 1.20f, // SSS-Rank (LevelIndex 5)
                _ => 1.00f  // C, B, A-Ranks (0, 1, 2)
            };
        }
    }
}