using UnityEngine;
using BaseGames.World;

namespace BaseGames.Dialogue
{
    /// <summary>
    /// 可交互 NPC 基类（架构 14_NarrativeModule §5）。
    /// 实现 IInteractable，触发对话序列；子类（如 QuestGiver）可覆盖对话选择逻辑。
    /// 程序集: BaseGames.Dialogue
    /// </summary>
    public class InteractableNPC : MonoBehaviour, IInteractable
    {
        [SerializeField] protected string              _npcId;
        [SerializeField] protected DialogueSequenceSO  _defaultDialogue;
        [SerializeField] protected float               _interactRadius = 1.5f;

        // ── IInteractable ──────────────────────────────────────────────────
        public virtual bool   CanInteract    => true;
        public virtual string InteractPrompt => "对话";

        public void Interact(Transform player)
        {
            if (!CanInteract) return;
            Interact_Internal(player);
            var dialogue = GetCurrentDialogue();
            if (dialogue != null)
                PlayDialogue(dialogue, player);
        }

        public virtual void OnPlayerEnterRange(Transform player) { }
        public virtual void OnPlayerExitRange() { }

        // ── 子类覆盖点 ──────────────────────────────────────────────────────

        /// <summary>交互前置逻辑（如任务接收/完成判断）。子类覆盖此方法。</summary>
        protected virtual void Interact_Internal(Transform player) { }

        /// <summary>返回当前应播放的对话序列。子类根据任务状态返回不同版本。</summary>
        protected virtual DialogueSequenceSO GetCurrentDialogue() => _defaultDialogue;

        // ── 对话播放 ───────────────────────────────────────────────────────

        protected virtual void PlayDialogue(DialogueSequenceSO sequence, Transform player)
        {
            if (sequence == null) return;
            var manager = BaseGames.Core.ServiceLocator.GetOrDefault<IDialogueService>();
            if (manager == null)
            {
                Debug.LogWarning($"[InteractableNPC:{_npcId}] DialogueManager 未注册到 ServiceLocator，无法播放对话。");
                return;
            }
            manager.StartDialogue(sequence, _npcId);
        }
    }
}