using System;
using System.Collections;
using System.Collections.Generic;
using Convention;
using Dreamteck.Splines;
using UnityEngine;

namespace Demo.Game
{
    public struct SplineClipDuration
    {
        public float ClipFrom;
        public float ClipTo;

        public SplineClipDuration(float clipFrom = 0, float clipTo = 1)
        {
            this.ClipFrom = clipFrom;
            this.ClipTo = clipTo;
        }
    }

    public interface IDependOnSplineCore : IScriptableObject
    {
        SplineCore MySplineCore { get; set; }
        IEnumerator LoadSpline(string path);
    }

    public static class DependOnSplineCoreUtility
    {
        public const string LoadSplineDescription = @"
<summary>
加载并绑定到新样条线
</summary>
<param name=""path"">对象相对路径，若对象不存在则作为脚本相对路径加载</param>
";

        /// <summary>
        /// 加载并绑定到新样条线
        /// </summary>
        /// <param name="path">对象相对路径，若对象不存在则作为脚本相对路径加载</param>
        public static IEnumerator LoadSplineTool(this IDependOnSplineCore self, string path)
        {
            var spline = self.SharedInterfaceScriptObject.FindWithPath(path, false);
            if (spline == null)
                yield return self.SharedInterfaceScriptObject.LoadSubScriptAsync(nameof(SplineCore), path, x => spline = x);
            if (spline is SplineCore sc)
            {
                self.MySplineCore = sc;
            }
            else
            {
                Debug.LogWarning($"{path} is not a SplineCore", self.SharedInterfaceScriptObject);
            }
        }
    }

    public class SplineCore : ScriptableObject
    {
        public static SplineCore Make()
        {
            return new GameObject("", typeof(SplineComputer)).AddComponent<SplineCore>();
        }

        [Content] public SplineComputer MySplineComputer;
        [Content] public int NodeContent = 0;
        [Content] public List<SplineNode> MySplineNodes = new();
        [Content] public SplineComputer.SampleMode MySampleMode = default;
        [Content] public Spline.Type MyType = default;

        public bool IsClose = false;

        public override IEnumerator LoadScript(string script)
        {
            MySplineComputer = GetComponent<SplineComputer>();
            yield return base.LoadScript(script);
            NodeContent = 0;
            MySplineComputer.SetPoints(new SplinePoint[MySplineNodes.Count]);
            foreach (SplineNode node in MySplineNodes)
            {
                node.AddTo(this);
                NodeContent++;
            }
            if (IsClose)
                MySplineComputer.Close();
            else
                MySplineComputer.Break();
            MySplineComputer.sampleMode = MySampleMode;
            MySplineComputer.type = MyType;
            yield return null;
            MySplineComputer.Rebuild();
        }

        protected override void UpdateTicks(float currentTime, float deltaTime, TickType tickType)
        {
            if (tickType == TickType.Start || tickType == TickType.Reset)
                MySplineComputer.Rebuild();
        }

        public override IEnumerator UnloadScript()
        {
            yield return base.UnloadScript();
            NodeContent = 0;
            MySplineNodes.Clear();
            IsClose = false;
        }

        /// <summary>
        /// 设置样条线类型
        /// </summary>
        /// <param name="mode">CatmullRom, BSpline, Bezier, Linear </param>
        [ScriptableCall(@"
<summary>
设置样条线类型
</summary>
<param name=""mode"">CatmullRom, BSpline, Bezier, Linear </param>
")]
        public void SetType(string mode)
        {
            MyType = Enum.Parse<Spline.Type>(mode);
        }

        /// <summary>
        /// 设置采样类型
        /// </summary>
        /// <param name="mode">Default, Uniform, Optimized</param>
        [ScriptableCall(@"
<summary>
设置采样类型
</summary>
<param name=""mode"">Default, Uniform, Optimized</param>
")]
        public void SetSampleMode(string mode)
        {
            MySampleMode = Enum.Parse<SplineComputer.SampleMode>(mode);
        }


        /// <summary>
        /// 闭环曲线
        /// </summary>
        [ScriptableCall(@"
<summary>
闭环曲线
</summary>
")]
        public void SetClose()
        {
            IsClose = true;
        }

        /// <summary>
        /// 加载并加入新节点
        /// </summary>
        /// <param name="path">脚本位置</param>
        [ScriptableCall(@"
<summary>
加载并加入新节点
</summary>
<param name=""path"">脚本位置</param>
")]
        public IEnumerator LoadNode(string path)
        {
            yield return LoadSubScriptAsync(nameof(SplineNode), path, node =>
            {
                if (node != null)
                {
                    MySplineNodes.Add(node as SplineNode);
                }
            });
        }

        /// <summary>
        /// 加入已加载的节点，如果目标脚本不是SplineNode，
        /// 那么为其添加SplineNode组件
        /// </summary>
        /// <param name="path">脚本位置</param>
        [ScriptableCall(@"
<summary>
加入已加载的节点，如果目标脚本不是SplineNode，
那么为其添加SplineNode组件
</summary>
<param name=""path"">脚本位置</param>
")]
        public void AddNode(string path)
        {
            var node = FindWithPath(path);
            if (node != null)
            {
                MySplineNodes.Add(node.GetOrAddComponent<SplineNode>());
            }
        }
    }
}