using UnityEngine;
using BaseGames.Player;

namespace BaseGames.Quest
{
    /// <summary>
    /// 任务目标基类（抽象，架构 22_QuestChallengeModule §3）。
    /// 所有具体目标类型均继承此类，通过多态实现零代码扩展。
    /// 每种目标在事件驱动下由 QuestManager 调用 EvaluateCompletion()。
    /// </summary>
    public abstract class QuestObjectiveSO : ScriptableObject
    {
        [Header("标识")]
        public string objectiveId;
        [TextArea(1, 4)]
        public string displayTextKey;       // 本地化 key（通过 LocalizationManager.Get(displayTextKey, "Quest") 显示）
        public bool   IsOptional;           // 可选目标（完成加奖励但不阻塞任务）

        /// <summary>根据当前进度判断目标是否完成。</summary>
        public abstract bool EvaluateCompletion(QuestObjectiveState state);
    }

    // ── 运行时目标进度状态（由 QuestManager 管理，不继承 SO）────────────────

    public class QuestObjectiveState
    {
        public bool completed     = false;
        public int  progressCount = 0;
    }

    // ── 具体目标类型 ────────────────────────────────────────────────────────

    /// <summary>与指定 NPC 对话后完成。</summary>
    [CreateAssetMenu(menuName = "Quest/Objective/TalkToNPC")]
    public class TalkToNPCObjective : QuestObjectiveSO
    {
        public string targetNpcId;

        public override bool EvaluateCompletion(QuestObjectiveState s) => s.progressCount >= 1;
    }

    /// <summary>击败指定 ID 的敌人若干次。</summary>
    [CreateAssetMenu(menuName = "Quest/Objective/Defeat")]
    public class DefeatEnemyObjective : QuestObjectiveSO
    {
        public string targetEnemyId;
        [Min(1)] public int defeatCount = 1;

        public override bool EvaluateCompletion(QuestObjectiveState s) => s.progressCount >= defeatCount;
    }

    /// <summary>收集指定 ID 的物品若干件。</summary>
    [CreateAssetMenu(menuName = "Quest/Objective/Collect")]
    public class CollectItemObjective : QuestObjectiveSO
    {
        public string itemId;
        [Min(1)] public int collectCount = 1;

        public override bool EvaluateCompletion(QuestObjectiveState s) => s.progressCount >= collectCount;
    }

    /// <summary>到达指定场景/区域标记点后完成。</summary>
    [CreateAssetMenu(menuName = "Quest/Objective/Reach")]
    public class ReachAreaObjective : QuestObjectiveSO
    {
        public string sceneName;    // 需到达的场景
        public string markerTag;    // 场景内的目标标记 Tag（预留）

        public override bool EvaluateCompletion(QuestObjectiveState s) => s.progressCount >= 1;
    }

    /// <summary>使用指定能力若干次后完成。</summary>
    [CreateAssetMenu(menuName = "Quest/Objective/UseSkill")]
    public class UseSkillObjective : QuestObjectiveSO
    {
        public AbilityType requiredAbility;
        [Min(1)] public int useCount = 1;

        public override bool EvaluateCompletion(QuestObjectiveState s) => s.progressCount >= useCount;
    }
}