using System.Collections.Generic;
using UnityEngine;

namespace DanroJump.Gameplay
{
    public sealed class PlatformController : MonoBehaviour, IPlatformRuntime, IPlatformLifecycle
    {
        [SerializeField] private List<PlatformSpawnPoint> collectibleSpawnPoints = new();
        [SerializeField] private List<PlatformSpawnPoint> equipmentSpawnPoints = new();
        [SerializeField] private List<PlatformSpawnPoint> enemySpawnPoints = new();

        public Transform Transform => transform;
        public IReadOnlyList<PlatformSpawnPoint> CollectibleSpawnPoints => collectibleSpawnPoints;
        public IReadOnlyList<PlatformSpawnPoint> EquipmentSpawnPoints => equipmentSpawnPoints;
        public IReadOnlyList<PlatformSpawnPoint> EnemySpawnPoints => enemySpawnPoints;
        public int SpawnIndex { get; private set; }
        public bool IsStartPlatform { get; private set; }
        public float WorldY { get; private set; }

        private void Awake()
        {
            CollectSpawnPoints();
        }

        private void OnValidate()
        {
            CollectSpawnPoints();
        }

        public void Initialize(PlatformSpawnContext context)
        {
            ApplyContext(context);
            NotifyChildrenInitialize(context);
        }

        public void Recycle(PlatformSpawnContext context)
        {
            ApplyContext(context);
            NotifyChildrenRecycle(context);
        }

        public void ResetPlatform()
        {
            NotifyChildrenReset();
        }

        private void ApplyContext(PlatformSpawnContext context)
        {
            SpawnIndex = context.SpawnIndex;
            IsStartPlatform = context.IsStartPlatform;
            WorldY = context.WorldY;
        }

        private void CollectSpawnPoints()
        {
            collectibleSpawnPoints.Clear();
            equipmentSpawnPoints.Clear();
            enemySpawnPoints.Clear();

            GetComponentsInChildren(true, collectibleBuffer);

            foreach (var spawnPoint in collectibleBuffer)
            {
                if (spawnPoint == null)
                {
                    continue;
                }

                GetSpawnPointList(spawnPoint.Kind).Add(spawnPoint);
            }

            collectibleBuffer.Clear();
        }

        private List<PlatformSpawnPoint> GetSpawnPointList(PlatformContentKind kind)
        {
            switch (kind)
            {
                case PlatformContentKind.Collectible:
                    return collectibleSpawnPoints;
                case PlatformContentKind.Equipment:
                    return equipmentSpawnPoints;
                case PlatformContentKind.Enemy:
                    return enemySpawnPoints;
                default:
                    return collectibleSpawnPoints;
            }
        }

        private void NotifyChildrenInitialize(PlatformSpawnContext context)
        {
            GetComponentsInChildren(true, lifecycleBuffer);

            foreach (var behaviour in lifecycleBuffer)
            {
                if (behaviour is IPlatformLifecycle lifecycle && !ReferenceEquals(lifecycle, this))
                {
                    lifecycle.Initialize(context);
                }
            }

            lifecycleBuffer.Clear();
        }

        private void NotifyChildrenRecycle(PlatformSpawnContext context)
        {
            GetComponentsInChildren(true, lifecycleBuffer);

            foreach (var behaviour in lifecycleBuffer)
            {
                if (behaviour is IPlatformLifecycle lifecycle && !ReferenceEquals(lifecycle, this))
                {
                    lifecycle.Recycle(context);
                }
            }

            lifecycleBuffer.Clear();
        }

        private void NotifyChildrenReset()
        {
            GetComponentsInChildren(true, lifecycleBuffer);

            foreach (var behaviour in lifecycleBuffer)
            {
                if (behaviour is IPlatformLifecycle lifecycle && !ReferenceEquals(lifecycle, this))
                {
                    lifecycle.ResetPlatform();
                }
            }

            lifecycleBuffer.Clear();
        }

        private readonly List<PlatformSpawnPoint> collectibleBuffer = new();
        private readonly List<MonoBehaviour> lifecycleBuffer = new();
    }
}