using System.Collections;
using System.Collections.Generic;
using AibisDream.FixSystem;
using AibisDream;
using Yarn.Unity;

namespace AibisDream.MiniGame.Language
{
    /// <summary>
    /// 表达系统的 Yarn 命令接口（原语言系统）
    /// </summary>
    public static class LanguageYarnCommand
    {
        private static AibisDream.ExpressionManager ExpressionManager => FixSystemCenter.SystemDic.Get<AibisDream.ExpressionManager>();

        /// <summary>
        /// 启动表达粒子系统（在打开视图后调用），等待火山表达panel播完再返回。
        /// 流程：若有上一轮则先淡出字与连线 → 再淡入火山释放 log → 再启动新一轮并等表达 panel 就绪。
        /// 注意：Yarn Spinner 2.x 对同名 <see cref="YarnCommand"/> 重载支持不可靠，只保留一个注册入口，用可选参数区分 3/4 参调用。
        /// <<start_expression "哈哈|嘿嘿|呵呵" "我很害怕" "ExpressionCompleted">>
        /// <<start_expression "哈哈|嘿嘿|呵呵" "我很害怕" "ExpressionCompleted" 24>>
        /// （第四项为「非目标」候选粒子总数，候选池 = 目标句字数 + 该值；不写第四项则用 Inspector 的 Candidate Count）
        /// </summary>
        /// <param name="anxietyPhrasesStr">干扰短句（笑话等），用 | 分隔，用于非目标粒子字符池，如："哈哈|嘿嘿|呵呵"</param>
        /// <param name="targetSentence">目标句子</param>
        /// <param name="completionNode">完成时触发的对话节点（可空字符串）</param>
        /// <param name="nonTargetParticleTotal">非目标候选粒子总数；&lt;0 表示使用 Inspector 默认</param>
        [YarnCommand("start_expression")]
        public static IEnumerator StartExpression(
            string anxietyPhrasesStr,
            string targetSentence,
            string completionNode = "",
            float nonTargetParticleTotal = -1f)
        {
            return RunStartExpression(
                anxietyPhrasesStr,
                targetSentence,
                completionNode ?? "",
                UnityEngine.Mathf.RoundToInt(nonTargetParticleTotal));
        }

        private static IEnumerator RunStartExpression(string anxietyPhrasesStr, string targetSentence, string completionNode, int nonTargetParticleTotal)
        {
            if (ExpressionManager == null)
            {
                UnityEngine.Debug.LogError("ExpressionManager 未找到！请确保场景中有 ExpressionManager 组件。");
                yield break;
            }

            string[] phrases = null;
            if (!string.IsNullOrEmpty(anxietyPhrasesStr))
            {
                phrases = anxietyPhrasesStr.Split('|');
                for (int i = 0; i < phrases.Length; i++)
                {
                    phrases[i] = phrases[i].Trim();
                }
            }

            // 先淡出上一轮文字/连线等，再淡入火山释放 log，最后开新一轮粒子（避免 log 与旧字叠在一起）
            yield return ExpressionManager.FadeOutParticlesBeforeNewRound(0f);
            yield return ExpressionManager.EnsureReleaseLogFadedIn(1f);
            ExpressionManager.StartSystem(phrases, targetSentence, completionNode, nonTargetParticleTotal);
            yield return ExpressionManager.WaitUntilExpressionFlowReady();
        }

        /// <summary>
        /// 关闭表达系统
        /// <<close_expression>>
        /// </summary>
        [YarnCommand("close_expression")]
        public static void CloseExpression()
        {
            if (ExpressionManager == null)
            {
                UnityEngine.Debug.LogError("ExpressionManager 未找到！");
                return;
            }

            ExpressionManager.CloseView();
        }

        /// <summary>
        /// 重置表达系统（使用当前配置）
        /// <<reset_expression>>
        /// 或
        /// <<reset_expression false>> // 不播放入场动画
        /// </summary>
        /// <param name="playEntranceEffect">是否播放入场效果</param>
        [YarnCommand("reset_expression")]
        public static void ResetExpression(bool playEntranceEffect = true)
        {
            if (ExpressionManager == null)
            {
                UnityEngine.Debug.LogError("ExpressionManager 未找到！");
                return;
            }

            ExpressionManager.ResetSystem(playEntranceEffect);
        }

        /// <summary>
        /// 触发聚焦稳定化（从文字飘动保持态 → 概率递增 → 文字锁定 → 排列），等待全流程完成后返回
        /// <<resolve_expression_focus>>
        /// </summary>
        [YarnCommand("resolve_expression_focus")]
        public static IEnumerator ResolveExpressionFocus()
        {
            if (ExpressionManager == null)
            {
                UnityEngine.Debug.LogError("ExpressionManager 未找到！");
                yield break;
            }
            yield return ExpressionManager.StartCoroutine(ExpressionManager.ResolveFocusAndWait());
        }

        /// <summary>
        /// 淡入 ExpressionManager 的 Sprite 图片
        /// <<expression_sprite_fade_in>>
        /// <<expression_sprite_fade_in 1.5>>
        /// </summary>
        /// <param name="duration">淡入时长（秒），默认 1</param>
        [YarnCommand("expression_sprite_fade_in")]
        public static IEnumerator ExpressionSpriteFadeIn(float duration = 1f)
        {
            if (ExpressionManager == null)
            {
                UnityEngine.Debug.LogError("ExpressionManager 未找到！");
                yield break;
            }
            yield return ExpressionManager.StartCoroutine(ExpressionManager.FadeInSpriteOverlay(duration));
        }

        /// <summary>
        /// 淡出 ExpressionManager 的 Sprite 图片
        /// <<expression_sprite_fade_out>>
        /// <<expression_sprite_fade_out 1.5>>
        /// </summary>
        /// <param name="duration">淡出时长（秒），默认 1</param>
        [YarnCommand("expression_sprite_fade_out")]
        public static IEnumerator ExpressionSpriteFadeOut(float duration = 1f)
        {
            if (ExpressionManager == null)
            {
                UnityEngine.Debug.LogError("ExpressionManager 未找到！");
                yield break;
            }
            yield return ExpressionManager.StartCoroutine(ExpressionManager.FadeOutSpriteOverlay(duration));
        }

        /// <summary>
        /// Glitch 噪波过渡，等待完成后再继续下一步。
        /// <<glitch_transition 0.95 2>>       -- 从 0 到 0.95，2 秒
        /// <<glitch_transition 0.95>>         -- 立即到 0.95（duration 默认 0）
        /// <<glitch_transition 0.3 0.45 1>>   -- 从 0.3 到 0.45，1 秒
        /// </summary>
        [YarnCommand("glitch_transition")]
        public static IEnumerator GlitchTransition(float to, float duration = 0f)
        {
            if (ExpressionManager == null)
            {
                UnityEngine.Debug.LogError("ExpressionManager 未找到！");
                yield break;
            }
            yield return ExpressionManager.StartCoroutine(ExpressionManager.TransitionGlitchAndWait(to, duration));
        }

        // /// <summary>
        // /// Glitch 噪波过渡（指定起止值），等待完成后再继续下一步。
        // /// </summary>
        // [YarnCommand("glitch_transition")]
        // public static IEnumerator GlitchTransition(float from, float to, float duration)
        // {
        //     if (ExpressionManager == null)
        //     {
        //         UnityEngine.Debug.LogError("ExpressionManager 未找到！");
        //         yield break;
        //     }
        //     yield return ExpressionManager.StartCoroutine(ExpressionManager.TransitionGlitchAndWait(from, to, duration));
        // }
    }
}