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

namespace Ichni.RhythmGame
{
    public partial class GameCamera : GameElement, IHaveTransformSubmodule, IHaveTimeDurationSubmodule
    {
        public Camera camera;
        public Transform rotationPoint;
        public Transform positionPoint;
        public Transform cameraTransform;

        public CameraViewType cameraViewType;
        public float perspectiveAngle;
        public float orthographicSize;

        public TransformSubmodule transformSubmodule { get; set; }
        public TimeDurationSubmodule timeDurationSubmodule { get; set; }

        public static GameCamera GenerateElement(string elementName, Guid id,
            List<string> tags, bool isFirstGenerated, GameElement parentElement,
            CameraViewType cameraViewType, float perspectiveAngle, float orthographicSize)
        {
            GameCamera gameCamera =
                Instantiate(EditorManager.instance.basePrefabs.gameCamera).GetComponent<GameCamera>();

            gameCamera.Initialize(elementName, id, tags, isFirstGenerated, parentElement);
            gameCamera.parentElement = parentElement;
            gameCamera.cameraViewType = cameraViewType;
            gameCamera.camera.orthographic = cameraViewType == CameraViewType.Orthographic;
            gameCamera.perspectiveAngle = perspectiveAngle;
            gameCamera.orthographicSize = orthographicSize;
            gameCamera.cameraTransform = gameCamera.transform;

            return gameCamera;
        }

        protected override void SetDefaultSubmodules()
        {
            transformSubmodule = new TransformSubmodule(this);
            submoduleList.Add(transformSubmodule);
        }
    }

    public partial class GameCamera
    {
        public enum CameraViewType
        {
            None = -1,
            Perspective = 0,
            Orthographic = 1
        }
    }

    public partial class GameCamera
    {
        public void SetTransformObserver()
        {
            Observable.EveryUpdate().Subscribe(_ =>
            {
                if (transformSubmodule.eulerAnglesOffsetLock)
                {
                    rotationPoint.eulerAngles = transformSubmodule.currentEulerAngles;
                }
                else if (transformSubmodule.eulerAnglesDirtyMark)
                {
                    Vector3 offset = Vector3.zero;
                    foreach (Vector3 eulerOffset in transformSubmodule.eulerAnglesOffset)
                    {
                        offset += eulerOffset;
                    }

                    transformSubmodule.currentEulerAngles = transformSubmodule.originalEulerAngles + offset;
                    rotationPoint.eulerAngles = transformSubmodule.currentEulerAngles;
                    transformSubmodule.eulerAnglesDirtyMark = false;
                }

                if (transformSubmodule.positionDirtyMark)
                {
                    Vector3 offset = Vector3.zero;
                    foreach (Vector3 posOffset in transformSubmodule.positionOffset)
                    {
                        offset += posOffset;
                    }

                    transformSubmodule.currentPosition = transformSubmodule.originalPosition + offset;
                    positionPoint.localPosition = transformSubmodule.currentPosition;
                    transformSubmodule.positionDirtyMark = false;
                }
            }).AddTo(gameObject);
        }
    }

    public partial class GameCamera
    {
        public override void SaveBM()
        {
            matchedBM = new GameCamera_BM(elementName, elementGuid, tags,
                parentElement.matchedBM as GameElement_BM, cameraViewType, perspectiveAngle, orthographicSize);
        }
    }

    namespace Beatmap
    {
        public class GameCamera_BM : GameElement_BM
        {
            public GameCamera.CameraViewType cameraViewType;
            public float perspectiveAngle;
            public float orthographicSize;

            public GameCamera_BM()
            {

            }

            public GameCamera_BM(string elementName, Guid elementGuid, List<string> tags,
                GameElement_BM attachedElement, GameCamera.CameraViewType cameraViewType,
                float perspectiveAngle, float orthographicSize)
                : base(elementName, elementGuid, tags, attachedElement)
            {
                this.cameraViewType = cameraViewType;
                this.perspectiveAngle = perspectiveAngle;
                this.orthographicSize = orthographicSize;
            }

            public override void ExecuteBM()
            {
                GameCamera.GenerateElement(elementName, elementGuid, tags, false,
                    GetElement(attachedElementGuid), cameraViewType, perspectiveAngle, orthographicSize);
            }

            public override GameElement DuplicateBM(GameElement parent)
            {
                return GameCamera.GenerateElement(elementName, elementGuid, tags, false,
                    parent, cameraViewType, perspectiveAngle, orthographicSize);
            }
        }
    }
}