using BaseGames.AI;

namespace BaseGames.Enemies
{
    /// <summary>
    /// E001（草蛭）AI —— 纯决策层，复用 PerceptionStateMachine 的"待机/警觉/追击/巡逻"统一规则。
    /// 只声明差异：待机=伪装静止、警觉=张口(e001_alert)、追击=委托 e001_chase 能力、R=巡逻。
    /// 追击移动/接触伤害由能力实现；退出追击由 AI 中断能力。依据 Docs/Game/Design/小怪设计-程序开发文档-01.md。
    /// </summary>
    [AiDefinition("E001")]
    public sealed class E001CaoZhiAi : AiScript
    {
        static IEnemyActor Actor(IAiContext c) => (IEnemyActor)c;

        protected override void Build(BrainBuilder b)
        {
            PerceptionStateMachine.Add(b, new PerceptionStateMachine.Config
            {
                Idle   = "Idle_Disguise",
                Patrol = "Move_Patrol",
                Alert  = "Alert",
                Chase  = "Chase",
                Death  = "Death",
                Entry  = "Idle_Disguise",
                Rest   = "Move_Patrol",
                ChaseAbilityId = "e001_chase",

                OnIdleEnter   = c => { c.Mover.Stop(); Actor(c).SetPhase(AiPhase.Idle); },
                OnPatrolEnter = c => { c.Mover.UsePatrolSpeed(); Actor(c).SetPhase(AiPhase.Patrol); },
                OnPatrolTick  = c => c.Mover.WalkRandom(),
                // 警觉：停下、朝向玩家、切 Alert 阶段(播警觉动画+feedback)、张口占位
                OnAlertEnter  = c => { c.Mover.Stop(); c.Mover.FacePlayer(); Actor(c).SetPhase(AiPhase.Alert); c.Combat.UseAbility("e001_alert"); },
                // 追击进入：切追击速度、朝向、Chase 阶段（追击能力由 PerceptionStateMachine 触发）
                OnChaseEnter  = c => { c.Mover.UseChaseSpeed(); c.Mover.FacePlayer(); Actor(c).SetPhase(AiPhase.Chase); },
                // 追击退出：中断追击能力（停移动、关接触伤害）
                OnChaseExit   = c => c.Combat.InterruptAbilities(),
                OnDeathEnter  = c => c.Mover.Stop(),
            });
        }
    }
}