using System;
using System.Collections;
using System.Collections.Generic;
using Dreamteck.Splines;
using Ichni.RhythmGame.Beatmap;
using UnityEngine;
using UnityEngine.Serialization;

namespace Ichni.RhythmGame
{
    public partial class ParticleTracker : GameElement, IHaveParticles, IHaveColorSubmodule
    {
        #region [暴露属性字段] Essential Configs
        public Track track;
        public string themeBundleName;
        public string materialName;
        
        public bool prewarm;
        public float playTime;
        public float stopTime;

        public bool is3D;
        public float width;
        public Vector3 extendDirection;
        public float density;
        public float lifeTime;
        public bool isAutoOrient;
        public Vector3 particleRotation;
        #endregion

        #region [计算与状态缓存] Calculated & Cached States
        public ParticleController particleController;
        public bool haveBaseColor => true;
        public bool haveEmissionColor => true;
        #endregion

        #region [子模块接口] Submodules
        public ParticleSystem particle { get; set; }
        public ColorSubmodule colorSubmodule { get; set; }
        #endregion
        
        #region [生命周期] Lifecycle & Factory
        public static ParticleTracker GenerateElement(string elementName, Guid id, List<string> tags,
            bool isFirstGenerated, Track track, string themeBundleName, string materialName,
            bool prewarm, float playTime, float stopTime,
            bool is3D, float width, Vector3 extendDirection,
            float density, float lifeTime,
            bool isAutoOrient, Vector3 particleRotation)
        {
            ParticleTracker particleTracker = Instantiate(GameManager.Instance.basePrefabs.particleTracker, track.transform)
                .GetComponent<ParticleTracker>();
            particleTracker.particle = particleTracker.GetComponent<ParticleSystem>();
            particleTracker.Initialize(elementName, id, tags, isFirstGenerated, track);
            particleTracker.track = track;
            particleTracker.particleController.spline = track.trackPathSubmodule.path;
            particleTracker.playTime = playTime;
            particleTracker.stopTime = stopTime;
            particleTracker.themeBundleName = themeBundleName;
            particleTracker.materialName = materialName;
            (particleTracker as IHaveParticles).SetParticleMaterial(themeBundleName, materialName);
            particleTracker.SetParticleSettings(prewarm, is3D, width, extendDirection, density, lifeTime, isAutoOrient, particleRotation);
            return particleTracker;
        }

        public override void SetDefaultSubmodules()
        {
            colorSubmodule = new ColorSubmodule(this, Color.white, true, Color.white, 0);
        }
        #endregion

        #region [运行时设置] Runtime Settings
        public void SetParticleSettings(bool prewarm, bool is3D, float width, Vector3 extendDirection,
            float density, float lifeTime, bool isAutoOrient, Vector3 particleRotation)
        {
            this.prewarm = prewarm;
            this.is3D = is3D;
            this.width = width;
            this.extendDirection = extendDirection;
            this.density = density;
            this.lifeTime = lifeTime;
            this.prewarm = prewarm;
            this.isAutoOrient = isAutoOrient;
            this.particleRotation = particleRotation;
            (this as IHaveParticles).SetParticleSettings(prewarm, ParticleSystemSimulationSpace.Local, density, 
                lifeTime, 0, 1, isAutoOrient, particleRotation);
            SetShape();
        }
        #endregion
    }

    #region [轮询更新] Main Update
    public partial class ParticleTracker
    {
        private void Update()
        {
            float songTime = CoreServices.TimeProvider.SongTime;
            if (playTime > songTime || stopTime < songTime)
            {
                particle.Stop();
            }
            else
            {
                if (!particle.isPlaying)
                {
                    particle.Play();
                }
            }
        }
    }
    #endregion

    #region [行为重写] Behavior Overrides
    public partial class ParticleTracker
    {
        private void SetShape()
        {
            particleController.is3D = is3D;
            particleController.width = width;
            particleController.extendDirection = extendDirection;
            particleController.Rebuild();
        }
        
        public override void Refresh()
        {
            base.Refresh();
            ParticleSystemRenderer particleSystemRenderer = particle.GetComponent<ParticleSystemRenderer>();
            particleSystemRenderer.material.SetColor("_BaseColor", colorSubmodule.currentBaseColor);
            if (colorSubmodule.emissionEnabled)
            {
                particleSystemRenderer.material.SetFloat("_EnableEmission", 1);
                particleSystemRenderer.material.SetColor("_EmissionColor", colorSubmodule.GetCurrentEmissionColor());
            }
            else
            {
                particleSystemRenderer.material.SetFloat("_EnableEmission", 0);
            }
        }
    }
    #endregion

}