using System.Collections.Generic;
using UnityEngine;
using BaseGames.Localization;

namespace BaseGames.Dialogue
{
    /// <summary>
    /// （架构 14_NarrativeModule §3）。
    /// 将 NPC 的显示名、头像、对话气泡颜色集中在一处管理。
    /// DialogueLine.actor 引用此 SO，修改头像/名称只需改一个资产，
    /// 无需批量编辑所有对话行。
    ///
    /// 资产路径：Assets/_Game/Data/Dialogue/Actors/Actor_{actorId}.asset
    /// </summary>
    [CreateAssetMenu(menuName = "BaseGames/Dialogue/DialogueActor")]
    public class DialogueActorSO : ScriptableObject, ILocalizableAsset
    {
        [Header("标识")]
        [Tooltip("唯一 ID，如 \"NPC_Elder\"，供 DialogueLine 引用")]
        public string actorId;

        [Header("显示")]
        [Tooltip("本地化 Key，格式如 \"NPC_Elder_Name\"")]
        public string nameKey;

        [Tooltip("对话 UI 中显示的头像")]
        public Sprite portrait;

        [Tooltip("对话气泡/说话人名称的主题颜色（可选）")]
        public Color  accentColor = Color.white;

        [Tooltip("是否为玩家角色（影响对话 UI 排版方向）")]
        public bool   isPlayer;

#if UNITY_EDITOR
        // actorId → 资产路径，5 秒 TTL，跨所有 DialogueActorSO.OnValidate 共用。
        // 与 QuestSO / DialogueSequenceSO 保持一致的 O(1) 重复检测策略。
        private static System.Collections.Generic.Dictionary<string, string> s_actorIdToPath;
        private static double s_actorIdsCacheTime = -10.0;

        private static System.Collections.Generic.Dictionary<string, string> GetActorIdCache()
        {
            double now = UnityEditor.EditorApplication.timeSinceStartup;
            if (s_actorIdToPath != null && now - s_actorIdsCacheTime < 5.0)
                return s_actorIdToPath;

            s_actorIdToPath = new System.Collections.Generic.Dictionary<string, string>(System.StringComparer.Ordinal);
            string[] guids = UnityEditor.AssetDatabase.FindAssets("t:DialogueActorSO");
            foreach (var guid in guids)
            {
                var path  = UnityEditor.AssetDatabase.GUIDToAssetPath(guid);
                var actor = UnityEditor.AssetDatabase.LoadAssetAtPath<DialogueActorSO>(path);
                if (actor != null && !string.IsNullOrEmpty(actor.actorId) && !s_actorIdToPath.ContainsKey(actor.actorId))
                    s_actorIdToPath[actor.actorId] = path;
            }
            s_actorIdsCacheTime = now;
            return s_actorIdToPath;
        }

        private void OnValidate()
        {
            if (string.IsNullOrWhiteSpace(actorId))
            {
                Debug.LogWarning($"[DialogueActorSO] '{name}' 缺少 actorId，保存前请填写。", this);
                return;
            }

            // 检测重复 actorId：缓存路径 vs 自身路径比对（O(1)），5 秒内无需重扫。
            var    cache  = GetActorIdCache();
            string myPath = UnityEditor.AssetDatabase.GetAssetPath(this);
            if (!string.IsNullOrEmpty(myPath) &&
                cache.TryGetValue(actorId, out var existingPath) &&
                existingPath != myPath)
            {
                Debug.LogError(
                    $"[DialogueActorSO] actorId '{actorId}' 与 " +
                    $"'{System.IO.Path.GetFileNameWithoutExtension(existingPath)}' 重复！请修改其中一个。", this);
                s_actorIdsCacheTime = -10.0;
            }
        }
#endif

        public IEnumerable<LocalizationKeyRef> GetLocalizationKeys()
        {
            if (!string.IsNullOrEmpty(nameKey))
                yield return new LocalizationKeyRef(nameKey, "Dialogue", nameof(nameKey));
        }
    }
}