using System.Collections;
using UnityEngine;

/// <summary>
/// 人类士兵技能：蓄力重斩体系（1/3/6/10 级完整阶梯）
/// 1级【蓄力重斩】：双手持短剑横向重斩，造成 150% 物理伤害（播放 SwordSlashThickWhite 锋利白剑气）
/// 3级【破阵蓄力】：重斩基础伤害提升至 190%，暴击率 +20%
/// 6级【断岳重击】：重斩附带强力震慑，命中直接使目标【眩晕 1.2 秒】（挂 StunStars 眩晕星星，强力打断蓄力）
/// 10级【不屈战魂】：生命值首次跌破 35% 时进入无畏状态（脚底光环 AuraSoftBlue），攻速 +60% 且普攻附带 30% 吸血，持续 6 秒绝地翻盘！
/// </summary>
public class HumanSoldierSkill : UnitSkill
{
    [Header("重斩配置")]
    [Tooltip("重斩攻击范围倍率")]
    public float slashDistanceBuffer = 0.5f;

    [Header("10级不屈战魂配置")]
    [Tooltip("战魂触发血量阈值")]
    public float undyingHealthThreshold = 0.35f;

    [Tooltip("战魂持续时间(秒)")]
    public float undyingDuration = 6.0f;

    [Tooltip("战魂攻速提升倍率")]
    public float undyingAttackSpeedMultiplier = 1.6f;

    [Tooltip("战魂额外吸血比例")]
    public float undyingLifestealRatio = 0.30f;

    [Header("特效资源")]
    public GameObject slashVfxPrefab;       // 横向白剑气 (SwordSlashThickWhite)
    public GameObject undyingAuraPrefab;     // 不屈战魂光环 (AuraSoftBlue)

    private bool isSkillPending = false;
    private bool undyingTriggered = false;
    private GameObject activeUndyingAuraInstance;
    private Coroutine activeUndyingCoroutine;

    private void EnsureUnit()
    {
        if (unit == null)
        {
            unit = GetComponent<UnitBase>();
        }
    }

    private void Start()
    {
        EnsureUnit();
        if (unit != null)
        {
            WorldHealthBar healthBar = unit.GetComponent<WorldHealthBar>();
            if (healthBar != null)
            {
                healthBar.OnHealthChanged += CheckUndyingTrigger;
            }
        }
    }

    /// <summary>
    /// 当能量蓄满时触发：播放人类士兵技能动画（双手横向重斩蓄力）
    /// </summary>
    public override void ReleaseSkill()
    {
        EnsureUnit();
        if (unit == null) return;

        WorldHealthBar healthBar = unit.GetComponent<WorldHealthBar>();
        if (healthBar == null || healthBar.IsDead) return;

        unit.FaceCurrentTarget(0f);
        isSkillPending = true;

        // 播放人类士兵技能动画，由 OnSkillHit1 帧触发斩击命中
        unit.PlaySkillAnimation(OnSkillAnimationFinished, 1.5f);
        Debug.Log($"<color=cyan>人类士兵释放技能【蓄力重斩】</color>，等待 OnSkillHit1 命中帧！");
    }

    /// <summary>
    /// 动画命中帧方法：在横向重斩刀刃挥出的瞬间触发 (OnSkillHit1)
    /// </summary>
    public void OnSkillHit1()
    {
        if (!isSkillPending) return;
        isSkillPending = false;

        EnsureUnit();
        if (unit == null || unit.Target == null) return;

        GameObject opponent = unit.Target;
        int level = unit.level;

        // 1. 播放横向锐利白剑气特效
        PlaySlashVfx(opponent);

        // 2. 计算技能伤害 (1级 150%, 3级+ 190%)
        float baseMultiplier = level >= 3 ? 1.90f : 1.50f;
        float finalMultiplier = baseMultiplier;

        // 3级解锁：暴击率额外 +20%
        float originalCritRate = unit.critRate;
        if (level >= 3)
        {
            unit.critRate += 0.20f;
        }

        // 3. 施加技能伤害
        unit.ApplySkillHit(finalMultiplier, true);

        // 恢复原有暴击率
        if (level >= 3)
        {
            unit.critRate = originalCritRate;
        }

        // 4. 6级解锁【断岳重击】：重斩附带 1.2 秒硬性眩晕打断
        if (level >= 6)
        {
            UnitBase targetUnit = opponent.GetComponentInParent<UnitBase>();
            if (targetUnit != null && targetUnit.IsAlive)
            {
                targetUnit.ApplyStun(1.2f);
                Debug.Log($"<color=yellow>【断岳重击】命中！</color> 目标 {targetUnit.gameObject.name} 眩晕 1.2 秒！");
            }
        }

        Debug.Log($"<color=cyan>【蓄力重斩】命中结算！</color> 伤害倍率: {finalMultiplier * 100:F0}% (等级: {level})");
    }

    /// <summary>
    /// 监测 10 级大招【不屈战魂】：血量首次跌破 35% 时进入无畏战神状态
    /// </summary>
    private void CheckUndyingTrigger(float currentHealth, float maxHealth)
    {
        if (undyingTriggered || unit == null || maxHealth <= 0f) return;

        int level = unit.level;
        if (level < 10) return;

        float ratio = currentHealth / maxHealth;
        if (ratio <= undyingHealthThreshold && currentHealth > 0f)
        {
            undyingTriggered = true;
            if (activeUndyingCoroutine != null) StopCoroutine(activeUndyingCoroutine);
            activeUndyingCoroutine = StartCoroutine(UndyingSoulRoutine());
        }
    }

    private IEnumerator UndyingSoulRoutine()
    {
        Debug.Log($"<color=red>【不屈战魂】爆发！</color> 人类士兵生命告急，开启狂暴反击（攻速+60%，吸血+30%）！");

        // 1. 播放脚底战神光环特效 (AuraSoftBlue)
        PlayUndyingAuraVfx();

        // 2. 施加攻速与吸血增益
        float prevLifesteal = unit.lifestealRate;
        unit.lifestealRate += undyingLifestealRatio;
        unit.MultiplyAttackSpeed(undyingAttackSpeedMultiplier, 3.5f);

        yield return new WaitForSeconds(undyingDuration);

        // 3. 恢复属性
        if (unit != null)
        {
            unit.lifestealRate = prevLifesteal;
            unit.MultiplyAttackSpeed(1f / undyingAttackSpeedMultiplier, 3.5f);
        }

        if (activeUndyingAuraInstance != null)
        {
            Destroy(activeUndyingAuraInstance);
            activeUndyingAuraInstance = null;
        }

        Debug.Log($"<color=gray>【不屈战魂】持续时间结束。</color>");
    }

    private void PlaySlashVfx(GameObject opponent)
    {
        GameObject prefab = slashVfxPrefab;
#if UNITY_EDITOR
        if (prefab == null)
        {
            prefab = UnityEditor.AssetDatabase.LoadAssetAtPath<GameObject>("Assets/TJGeneratorLibEffects/Prefabs/Combat/Sword/Slash/SwordSlashThick/SwordSlashThickWhite.prefab");
        }
#endif
        if (prefab != null && unit != null)
        {
            Vector3 spawnPos = unit.transform.position + Vector3.up * 0.9f + unit.transform.forward * 0.8f;
            // X轴固定-90度平铺，Y轴为0，将人类士兵的Y轴朝向取反赋值给Z轴旋转
            Quaternion rot = Quaternion.Euler(-90f, 0f, -unit.transform.eulerAngles.y);
            var vfx = Instantiate(prefab, spawnPos, rot);
            vfx.transform.rotation = rot;
            vfx.transform.localScale = Vector3.one * 1.3f;
            Destroy(vfx, 1.5f);
        }
    }

    private void PlayUndyingAuraVfx()
    {
        GameObject prefab = undyingAuraPrefab;
#if UNITY_EDITOR
        if (prefab == null)
        {
            prefab = UnityEditor.AssetDatabase.LoadAssetAtPath<GameObject>("Assets/TJGeneratorLibEffects/Prefabs/Combat/Magic/Aura Soft/AuraSoftBlue.prefab");
        }
#endif
        if (prefab != null && unit != null)
        {
            // AuraSoftBlue 采用 Mesh(Quad) 水平平铺地面，需继承其自身的 -90° (270°) X 轴旋转
            Quaternion rot = prefab.transform.rotation;
            activeUndyingAuraInstance = Instantiate(prefab, unit.transform.position + Vector3.up * 0.05f, rot);
            activeUndyingAuraInstance.transform.rotation = rot;
            activeUndyingAuraInstance.transform.SetParent(unit.transform, true);
        }
    }

    private void OnSkillAnimationFinished()
    {
        isSkillPending = false;
    }

    private void OnDestroy()
    {
        if (activeUndyingAuraInstance != null) Destroy(activeUndyingAuraInstance);
        if (unit != null)
        {
            WorldHealthBar healthBar = unit.GetComponent<WorldHealthBar>();
            if (healthBar != null) healthBar.OnHealthChanged -= CheckUndyingTrigger;
        }
    }
}