using System;
using Colosseum.AI;
using Colosseum.Skills;
using Unity.Behavior;
using Unity.Properties;
using UnityEngine;
using Action = Unity.Behavior.Action;

/// <summary>
/// 보스 패턴을 실행하는 Behavior Tree Action.
/// 패턴 내 스텝(스킬 또는 대기)을 순서대로 실행하며, 패턴 쿨타임을 관리합니다.
/// </summary>
[Serializable, GeneratePropertyBag]
[NodeDescription(name: "Use Pattern", story: "[Pattern] 실행", category: "Action", id: "a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6")]
public partial class UsePatternAction : Action
{
    [SerializeReference] public BlackboardVariable<BossPatternData> Pattern;

    private SkillController skillController;
    private int currentStepIndex;
    private float waitEndTime;
    private bool isWaiting;
    private float lastUsedTime = float.MinValue;

    protected override Status OnStart()
    {
        if (Pattern?.Value == null)
        {
            Debug.LogWarning("[UsePatternAction] 패턴이 null입니다.");
            return Status.Failure;
        }

        if (Time.time - lastUsedTime < Pattern.Value.Cooldown)
        {
            return Status.Failure;
        }

        if (Pattern.Value.Steps.Count == 0)
        {
            return Status.Failure;
        }

        skillController = GameObject.GetComponent<SkillController>();
        if (skillController == null)
        {
            Debug.LogWarning($"[UsePatternAction] SkillController를 찾을 수 없습니다: {GameObject.name}");
            return Status.Failure;
        }

        currentStepIndex = 0;
        isWaiting = false;
        return ExecuteCurrentStep();
    }

    protected override Status OnUpdate()
    {
        if (skillController == null)
            return Status.Failure;

        if (isWaiting)
        {
            if (Time.time < waitEndTime)
                return Status.Running;

            isWaiting = false;
        }
        else
        {
            if (skillController.IsPlayingAnimation)
                return Status.Running;

        }

        currentStepIndex++;

        if (currentStepIndex >= Pattern.Value.Steps.Count)
        {
            lastUsedTime = Time.time;
            return Status.Success;
        }

        return ExecuteCurrentStep();
    }

    protected override void OnEnd()
    {
        skillController = null;
    }

    private Status ExecuteCurrentStep()
    {
        PatternStep step = Pattern.Value.Steps[currentStepIndex];

        if (step.Type == PatternStepType.Wait)
        {
            isWaiting = true;
            waitEndTime = Time.time + step.Duration;
            return Status.Running;
        }

        // PatternStepType.Skill
        if (step.Skill == null)
        {
            Debug.LogWarning($"[UsePatternAction] 스킬이 null입니다. (index {currentStepIndex})");
            return Status.Failure;
        }

        bool success = skillController.ExecuteSkill(step.Skill);
        if (!success)
        {
            Debug.LogWarning($"[UsePatternAction] 스킬 실행 실패: {step.Skill.SkillName} (index {currentStepIndex})");
            return Status.Failure;
        }

        return Status.Running;
    }
}