using System;

using Unity.Behavior;
using Unity.Properties;
using UnityEngine;

using Colosseum.Enemy;

namespace Colosseum.AI.BehaviorActions.Actions
{
    /// <summary>
    /// 준비된 후보 패턴 중 하나를 가중치 기반으로 선택하고 즉시 실행합니다.
    /// </summary>
    [Serializable, GeneratePropertyBag]
    [NodeDescription(
        name: "Use Weighted Ready Pattern",
        story: "준비된 후보 패턴 중 하나를 가중치 기반으로 선택해 실행",
        category: "Action",
        id: "6d4fc6fd-0ccd-4d9a-8b86-c602062f78a7")]
    public partial class UseWeightedReadyPatternAction : BossPatternActionBase
    {
        [SerializeReference] public BlackboardVariable<BossPatternData> Pattern1;
        [SerializeReference] public BlackboardVariable<float> Weight1 = new BlackboardVariable<float>(1f);
        [SerializeReference] public BlackboardVariable<BossPatternData> Pattern2;
        [SerializeReference] public BlackboardVariable<float> Weight2 = new BlackboardVariable<float>(1f);
        [SerializeReference] public BlackboardVariable<BossPatternData> Pattern3;
        [SerializeReference] public BlackboardVariable<float> Weight3 = new BlackboardVariable<float>(1f);
        [SerializeReference] public BlackboardVariable<BossPatternData> Pattern4;
        [SerializeReference] public BlackboardVariable<float> Weight4 = new BlackboardVariable<float>(1f);
        [SerializeReference] public BlackboardVariable<BossPatternData> Pattern5;
        [SerializeReference] public BlackboardVariable<float> Weight5 = new BlackboardVariable<float>(1f);

        private BossPatternData selectedPattern;

        protected override Status OnStart()
        {
            if (!TrySelectPattern(out selectedPattern))
                return Status.Failure;

            BossBehaviorRuntimeState context = GameObject.GetComponent<BossBehaviorRuntimeState>();
            context?.LogDebug(nameof(UseWeightedReadyPatternAction), $"가중치 패턴 선택 후 실행: {selectedPattern.PatternName}");
            return base.OnStart();
        }

        protected override void OnEnd()
        {
            selectedPattern = null;
            base.OnEnd();
        }

        protected override bool TryResolvePattern(out BossPatternData pattern, out GameObject target)
        {
            target = Target != null ? Target.Value : null;
            pattern = selectedPattern;

            if (pattern == null && !TrySelectPattern(out pattern))
                return false;

            if (target == null)
                return false;

            return true;
        }

        private bool TrySelectPattern(out BossPatternData pattern)
        {
            WeightedPatternCandidate[] candidates =
            {
                new WeightedPatternCandidate(Pattern1?.Value, Weight1?.Value ?? 0f),
                new WeightedPatternCandidate(Pattern2?.Value, Weight2?.Value ?? 0f),
                new WeightedPatternCandidate(Pattern3?.Value, Weight3?.Value ?? 0f),
                new WeightedPatternCandidate(Pattern4?.Value, Weight4?.Value ?? 0f),
                new WeightedPatternCandidate(Pattern5?.Value, Weight5?.Value ?? 0f),
            };

            return WeightedPatternSelector.TrySelectReadyPattern(GameObject, candidates, out pattern);
        }
    }
}