using Cielonos.MainGame.Characters;
using SLSUtilities.Feedback;
using UnityEngine;

namespace Cielonos.MainGame.Effects.Feedback
{
    /// <summary>
    /// IFeedbackTimeProvider 的游戏层实现，从 SelfTimeSubmodule 和 TimeManager 读取时间缩放。
    /// 每个角色的 FeedbackSubcontroller 持有一个实例，注入到 FeedbackPlayer 中。
    /// </summary>
    public class CharacterFeedbackTimeProvider : IFeedbackTimeProvider
    {
        private readonly CharacterBase _character;

        public CharacterFeedbackTimeProvider(CharacterBase character)
        {
            _character = character;
        }

        /// <summary>
        /// 全局时间缩放（TimeManager.globalTimeScale）。
        /// </summary>
        public float GlobalTimeScale => TimeManager.Instance != null ? TimeManager.Instance.globalTimeScale.Value : 1f;

        /// <summary>
        /// 分组时间缩放，根据角色 Fraction 返回对应的 TimeManager 通道值。
        /// </summary>
        public float GroupTimeScale
        {
            get
            {
                if (TimeManager.Instance == null || _character == null) return 1f;

                return _character.fraction switch
                {
                    Fraction.Player => TimeManager.Instance.playerTimeScale.Value,
                    Fraction.AlliedMinion => TimeManager.Instance.alliedMinionTimeScale.Value
                                            * TimeManager.Instance.nonPlayerTimeScale.Value,
                    Fraction.Enemy => TimeManager.Instance.enemyTimeScale.Value
                                     * TimeManager.Instance.nonPlayerTimeScale.Value,
                    Fraction.Neutral => TimeManager.Instance.nonPlayerTimeScale.Value,
                    _ => 1f
                };
            }
        }

        /// <summary>
        /// 角色本地时间缩放（SelfTimeSubmodule.localTimeScale）。
        /// </summary>
        public float LocalTimeScale => _character?.selfTimeSm?.localTimeScale?.Value ?? 1f;

        /// <summary>
        /// 根据 FeedbackTimeSettings 计算综合时间缩放系数（不含 deltaTime）。
        /// 返回 1.0 表示正常速度。
        /// </summary>
        public float GetTimeScale(FeedbackTimeSettings settings)
        {
            if (_character == null || 
                settings == null || 
                settings.timeScaleType == FeedbackTimeSettings.TimeScaleType.Unscaled) return 1f;

            float scale = 1f;

            if (settings.timeScaleType == FeedbackTimeSettings.TimeScaleType.Global) scale *= GlobalTimeScale;
            if (settings.timeScaleType == FeedbackTimeSettings.TimeScaleType.Group) scale *= GroupTimeScale;
            if (settings.timeScaleType == FeedbackTimeSettings.TimeScaleType.Local) scale *= LocalTimeScale;

            return scale;
        }

        /// <summary>
        /// 根据 FeedbackTimeSettings 组合各层级缩放计算实际 deltaTime（秒）。
        /// </summary>
        public float GetDeltaTime(FeedbackTimeSettings settings)
        {
            if (_character == null) return Time.deltaTime;
            
            return Time.deltaTime * GetTimeScale(settings);
        }
    }
}