using System.Collections;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;

namespace Superlazy
{
    public class SLResourceObject : MonoBehaviour
    {
        public Animator[] anims;
        public Renderer[] renderers;
        public ParticleSystem[] particles;
        public TrailRenderer[] trails;
        public SLStateController[] stateControllers;
        public SLContextController[] contextControllers;
        public float destroyDelay;

        private Dictionary<string, Transform> transforms; // 자주 안쓰일듯해 필요할때 캐싱

        public void Init()
        {
            anims = GetComponentsInChildren<Animator>();
            renderers = GetComponentsInChildren<Renderer>().Where(r => r is MeshRenderer || r is SkinnedMeshRenderer).ToArray();
            particles = GetComponentsInChildren<ParticleSystem>();
            trails = GetComponentsInChildren<TrailRenderer>();
            stateControllers = GetComponentsInChildren<SLStateController>();
            contextControllers = GetComponentsInChildren<SLContextController>();

            foreach (var a in anims)
            {
                a.keepAnimatorStateOnDisable = true;
                a.updateMode = AnimatorUpdateMode.Normal;
                a.cullingMode = AnimatorCullingMode.AlwaysAnimate;
            }

            // TODO: destroyDelay 를 컨트롤하는 별도의 상수 개념 추가
            foreach (var t in trails)
            {
                destroyDelay = Mathf.Max(destroyDelay, t.time);
            }

            foreach (var p in particles)
            {
                var main = p.main;
                if (main.loop) continue;
                var lt = main.startLifetime;
                switch (main.startLifetime.mode)
                {
                    case ParticleSystemCurveMode.Constant:
                        destroyDelay = Mathf.Max(destroyDelay, lt.constant);
                        break;

                    case ParticleSystemCurveMode.TwoConstants:
                        destroyDelay = Mathf.Max(destroyDelay, lt.constantMax, lt.constantMin);
                        break;

                    case ParticleSystemCurveMode.Curve:
                    case ParticleSystemCurveMode.TwoCurves:
                        destroyDelay = Mathf.Max(destroyDelay, lt.curveMultiplier * main.startLifetimeMultiplier);
                        break;
                }
            }

            foreach (var c in stateControllers)
            {
                c.Init();
            }

            foreach (var c in contextControllers)
            {
                c.Init();
            }
        }

        public void OnEnable()
        {
            foreach (var r in renderers)
            {
                r.enabled = true;
            }

            foreach (var p in particles)
            {
                p.Clear();
                p.Play();
            }

            foreach (var t in trails)
            {
                t.Clear();
                t.emitting = true;
            }

            foreach (var c in stateControllers)
            {
                c.Clear();
            }

            foreach (var c in contextControllers)
            {
                c.Clear();
            }
        }

        public void Destroy(bool force = false)
        {
            foreach (var r in renderers)
            {
                r.enabled = false;
            }

            foreach (var p in particles)
            {
                p.Stop();
            }

            foreach (var t in trails)
            {
                t.emitting = false;
            }

            foreach (var c in stateControllers)
            {
                c.Clear();
            }

            foreach (var c in contextControllers)
            {
                c.Clear();
            }

            if (force == false && destroyDelay > 0.0f && gameObject.activeInHierarchy)
            {
                StartCoroutine(DelayEnd());
            }
            else
            {
                SLResources.DestroyInstance(this);
            }
        }

        private IEnumerator DelayEnd()
        {
            transform.SetParent(null, true);
            yield return new WaitForSeconds(destroyDelay);
            transform.localPosition = Vector3.zero;
            transform.localRotation = Quaternion.identity;
            transform.localScale = Vector3.one;
            SLResources.DestroyInstance(this);
        }

        public void SetKeyword(string state, bool enable = true)
        {
            foreach (var c in stateControllers)
            {
                c.EnableKeyword(state, enable);
            }
        }

        public void SetContext(SLEntity context)
        {
            foreach (var c in contextControllers)
            {
                c.SetContext(context);
            }
        }

        public Transform GetTransform(string name)
        {
            if (transforms == null)
            {
                transforms = new Dictionary<string, Transform>();
                foreach (var t in GetComponentsInChildren<Transform>())
                {
                    if (transforms.ContainsKey(t.name)) continue;
                    transforms[t.name] = t;
                }
            }

            if (transforms.ContainsKey(name))
            {
                return transforms[name];
            }

            return transform; // 없다면 Root
        }
    }
}