using System;
using System.Collections;
using System.Collections.Generic;
using Ichni.RhythmGame.Beatmap;
using UniRx;
using UnityEngine;

namespace Ichni.RhythmGame
{
    public partial class Trail : GameElement, IHaveTransformSubmodule, IHaveTrail
    {
        public TrailRenderer trailRenderer { get; set; }
        public Material renderMaterial;

        public float visibleTimeLength;
        public bool isAutoOrient;
        public float widthMultiplier;
        public AnimationCurve widthCurve;
        public Gradient gradient;

        public TransformSubmodule transformSubmodule { get; set; }

        public static Trail GenerateElement(string name, Guid id, List<string> tags, bool isFirstGenerated,
            GameElement parentElement, float visibleTimeLength, bool isAutoOrient, float widthMultiplier,
            AnimationCurve widthCurve, Gradient gradient, Material material = null)
        {
            Trail trail = Instantiate(GameManager.instance.basePrefabs.trail, parentElement.transform).GetComponent<Trail>();
            trail.trailRenderer = trail.GetComponent<TrailRenderer>();

            trail.Initialize(name, id, tags, isFirstGenerated, parentElement);

            trail.renderMaterial = material == null ? GameManager.instance.basePrefabs.defaultTrailMaterial : material;
            trail.visibleTimeLength = visibleTimeLength;
            trail.isAutoOrient = isAutoOrient;
            trail.widthMultiplier = widthMultiplier;
            trail.widthCurve = widthCurve;
            trail.gradient = gradient;

            trail.trailRenderer.material = trail.renderMaterial;
            trail.trailRenderer.time = visibleTimeLength;
            trail.trailRenderer.alignment = isAutoOrient ? LineAlignment.View : LineAlignment.TransformZ;
            trail.trailRenderer.widthMultiplier = widthMultiplier;
            trail.trailRenderer.widthCurve = widthCurve;
            trail.trailRenderer.colorGradient = gradient;
            trail.trailRenderer.emitting = false;
            return trail;
        }

        public override void SetDefaultSubmodules()
        {
            transformSubmodule = new TransformSubmodule(this);
        }
        
        public override void WhenStart()
        {
            base.WhenStart();
            trailRenderer.emitting = true;
            trailRenderer.Clear();
        }
    }

    public partial class Trail
    {
        public override void SaveBM()
        {
            matchedBM = new Trail_BM(elementName, elementGuid, tags, parentElement.matchedBM as GameElement_BM,
                visibleTimeLength, isAutoOrient, widthMultiplier, widthCurve, renderMaterial, gradient);
        }
    }

    public interface IHaveTrail
    {
        TrailRenderer trailRenderer { get; set; }
    }

    namespace Beatmap
    {
        public class Trail_BM : GameElement_BM
        {
            public float visibleTimeLength;
            public string renderMaterialName;
            public bool isAutoOrient;
            public float widthMultiplier;
            public AnimationCurve widthCurve;
            public Gradient gradient;

            public Trail_BM()
            {

            }

            public Trail_BM(string elementName, Guid elementGuid, List<string> tags, GameElement_BM attachedElement,
                float visibleTimeLength, bool isAutoOrient, float widthMultiplier,
                AnimationCurve widthCurve, Material renderMaterial, Gradient gradient) : base(elementName, elementGuid, tags,
                attachedElement)
            {
                this.visibleTimeLength = visibleTimeLength;
                this.renderMaterialName = renderMaterial.name;
                this.isAutoOrient = isAutoOrient;
                this.widthMultiplier = widthMultiplier;
                this.widthCurve = widthCurve;
                this.gradient = gradient;
            }

            public override void ExecuteBM()
            {
                matchedElement = Trail.GenerateElement(elementName, elementGuid, tags,
                    false, GetElement(attachedElementGuid),
                    visibleTimeLength, isAutoOrient, widthMultiplier, widthCurve, gradient);
            }
        }
    }
}