using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using UnityEngine;
using UnityEngine.XR.ARSubsystems;

public enum PopupState
{
    None,
    ConfirmAddPoint,
    ConfirmModifyPoint,
    MoveOrDelete,
    ConfirmDelete 
}

public class ProgramPresenter
{
    private ProgramModel model;
    private IProgramView view;
    private TCPView tcpView;
    private RobotController controlledRobot;
    private string _programId;
    private bool lastKnownMotorState = false;

    private IInteractionView interactionView;
    private IPointManagerView pointManagerView;
    private IPathLineView pathLineView;
    private IPopupView popupView;

    private PopupState currentPopupState = PopupState.None;
    private RobotData pendingPointData; // 팝업창에 대한 응답을 기다리는 임시 데이터
    private int activePointIndex = -1;  // 현재 수정/삭제 중인 포인트의 인덱스

    private bool IsDragging = false;

    public ProgramPresenter(ProgramModel model, IProgramView view, TCPView tcpView,
        IInteractionView interactionView, IPointManagerView pmView, IPopupView popView, IPathLineView pathLineView)
    {
        this.model = model;
        this.view = view;
        this.tcpView = tcpView;

        this.view.OnCreateProgramClicked += async (id) => await HandleCreateProgram(id);
        this.view.OnLoadProgramListRequested += HandleLoadProgramList;
        this.view.OnProgramSelectedToLoad += HandleProgramSelected;
        this.view.OnOpenProgramClicked += async () => await HandleOpenProgram();
        this.view.OnSaveClicked += HandleSaveProgram;
        this.view.OnAddPointClicked += HandleAddPoint;
        this.tcpView.OnTCPupdateRequested += HandleTCPViewUpdate;

        //this.interactionView.OnRobotReleased += HandleRobotReleased;
        //this.interactionView.OnPointClicked += HandlePointClicked;
        //this.interactionView.OnPointDragStart += HandlePointDragStart;
        //this.interactionView.OnPointDragUpdate += HandlePointDragUpdate;
        //this.interactionView.OnPointDragEnd += HandlePointDragEnd;

        //this.popupView.OnPopupResponse += HandlePopupResponse;
    }

    public void RegisterControlledRobot(RobotController robot)
    {
        this.controlledRobot = robot;
        this.controlledRobot.OnPoseUpdateRequest += HandlePoseViewUpdate;
    }

    public async Task UpdateMotorStateAsync()
    {
        try
        {
            bool currentState = await model.GetRobotMotorStateAsync();

            if (currentState != lastKnownMotorState)
            {
                controlledRobot.SetMotorState(currentState);
                lastKnownMotorState = currentState;
            }
        }
        catch (Exception e)
        {
            Debug.LogWarning($"모터 상태 업데이트 실패: {e.Message}");
        }
    }

    public void OnApplicationStart()
    {
        if (controlledRobot != null)
        {
            Debug.Log("제어할 로봇이 등록되었습니다.");
        }
        else
        {
            Debug.LogError("제어할 로봇이 등록되지 않았습니다");
        }
    }

    private async Task HandleCreateProgram(string programId)
    {
        if (await model.CreateNewProgram(programId))
        {
            view.DisplayProgram(programId);
            view.HideProgramSelectPanel();
            OnApplicationStart();
        }
        else
        {
            view.ShowMessage($"Error: Program ID '{programId}.job' already exists or is invalid.");
        }
    }

    private void HandleLoadProgramList()
    {
        var programIds = model.GetAllProgramIds();
        view.ShowProgramList(programIds);
    }

    private void HandleProgramSelected(string programId)
    {
        _programId = programId;
    }

    private async Task HandleOpenProgram()
    {
        if(_programId != null && await model.LoadProgram(_programId))
        {
            view.DisplayProgram(_programId);
            view.HideProgramSelectPanel();
            view.HideProgramList();

            OnApplicationStart();

            _programId = null;
        }
    }

    private void HandleSaveProgram()
    {
        //model.SaveCurrentProgram();
    }

    private void HandleAddPoint()
    {
        //// 실제로는 UI상의 좌표나 로봇 엔드포인트 좌표를 받아와야 함
        //// 여기서는 예시로 랜덤 좌표를 사용
        //Vector3 newPoint = new Vector3(Random.Range(-1f, 1f), Random.Range(0f, 1f), Random.Range(-1f, 1f));

        //model.AddPointToCurrentProgram(newPoint);
        //view.DisplayProgram(model.CurrentProgram);
    }

    private void HandleTCPViewUpdate()
    {
        if (model.IsNewDataAvailable())
        {
            RobotData data = model.GetLatestRobotData();

            tcpView.SetCoordinates(data);
        }
    }

    // --- 실시간 동기화 ---
    private void HandlePoseViewUpdate()
    {
        RobotData data = model.GetLatestRobotData();
        controlledRobot.SetRobotPosition(data); // 3D 가상 로봇 모델 위치 업데이트
    }

    // --- 새 포인트 추가 ---
    private void HandleRobotReleased(RobotData pose)
    {
        pendingPointData = pose; // 1. 임시 저장
        currentPopupState = PopupState.ConfirmAddPoint; // 2. 상태 설정
        popupView.ShowConfirmPopup("위치 확정", "이 위치를 새 포인트로 저장하시겠습니까?"); // 3. 팝업 요청
    }

    // --- 포인트 클릭 ---
    private void HandlePointClicked(int index)
    {
        activePointIndex = index; // 인덱스 저장
        currentPopupState = PopupState.MoveOrDelete; // 상태 설정
        popupView.ShowOptionPopup("포인트 작업", "무엇을 하시겠습니까?", "여기로 이동", "삭제"); // 팝업 요청
    }

    // --- 포인트 드래그 ---
    private RobotData originalDragPose; // 취소 시 돌아갈 원본 위치

    private void HandlePointDragStart(int index)
    {
        IsDragging = true;
        activePointIndex = index;
        originalDragPose = model.CurrentProgram.GetStepPose(index);

        //interactionView.ShowDragArrow(GetPositionFromPose(originalDragPose));
        interactionView.ShowGhostRobot(originalDragPose);
    }

    private async void HandlePointDragUpdate(int index, Vector3 newWorldPos)
    {
        if (!IsDragging) return;
        //RobotData newPose = ConvertVectorToRobotData(newWorldPos);

        // 고스트 로봇, 포인트, 경로 실시간 이동
        //interactionView.ShowGhostRobot(newPose);
        //pointManagerView.UpdatePointPosition(index, newPose);
        //pathLineView.DrawPath(GetFullPathOfProgramWithTempChange(index, newPose)); // 임시 경로 그리기

        //await model.StreamPoseToRobotUdpAsync(newPose);
    }

    private void HandlePointDragEnd(int index)
    {
        //IsDragging = false;
        //interactionView.HideDragArrow();
        //interactionView.HideGhostRobot();

        //// (가상 로봇 위치 이동 로직 - 5단계)
        //// robotController.SetRobotPosition(newPose);

        //pendingPointData = ConvertVectorToRobotData(GetLastDragPosition()); // 임시 저장
        //currentPopupState = PopupState.ConfirmModifyPoint; // 상태 설정
        //popupView.ShowConfirmPopup("위치 수정", "이 위치로 포인트를 수정하시겠습니까?"); // 팝업 요청
    }


    // --- 팝업 응답 통합 핸들러 ---
    private async void HandlePopupResponse(PopupResponse response)
    {
        popupView.HidePopup();

        switch (currentPopupState)
        {
            case PopupState.ConfirmAddPoint:
                if (response == PopupResponse.Confirm) // 확정
                {
                    await model.SavePointToProgramAsync(pendingPointData);
                    RedrawSceneFromModel(); // 뷰 갱신
                }
                break;

            // 드래그 확정/취소
            case PopupState.ConfirmModifyPoint:
                if (response == PopupResponse.Confirm) // 확정
                {
                    // 최종 위치를 서버에 저장
                    // 드래그가 끝났으니 이 위치를 프로그램에 저장
                    await model.SavePointToProgramAsync(pendingPointData, activePointIndex);
                    RedrawSceneFromModel();
                }
                else // 취소
                {
                    pointManagerView.UpdatePointPosition(activePointIndex, originalDragPose); // 원위치
                    RedrawSceneFromModel(); // 경로 원위치
                }
                break;

            // 이동/삭제
            case PopupState.MoveOrDelete:
                if (response == PopupResponse.Option1) // 여기로 이동
                {
                    RobotData targetPose = model.CurrentProgram.GetStepPose(activePointIndex);
                    //await model.StartMovement(targetPose);
                }
                else if (response == PopupResponse.Option2) // 삭제
                {
                    currentPopupState = PopupState.ConfirmDelete;
                    popupView.ShowConfirmPopup("삭제 확인", "정말로 이 포인트를 삭제하시겠습니까?");
                }
                break;

            // 최종 삭제
            case PopupState.ConfirmDelete:
                if (response == PopupResponse.Confirm)
                {
                    await model.DeletePointFromProgramAsync(activePointIndex);
                    RedrawSceneFromModel();
                }
                break;
        }

        // 모든 작업 후 상태 초기화
        currentPopupState = PopupState.None;
        activePointIndex = -1;
    }

    // Model의 현재 상태를 읽어 모든 View(포인트, 경로)를 새로 고침
    private void RedrawSceneFromModel()
    {
        //if (model.CurrentProgram == null) return;

        //// (RobotProgram.Steps (List<RobotMoveStep>)를 List<RobotData>로 변환하는 로직)
        //List<RobotData> poses = model.CurrentProgram.GetAllStepPoses();

        //pointManagerView.RedrawPoints(poses); // 포인트 다시 그림
        //pathLineView.DrawPath(poses);     // 경로 다시 그림
    }

    private void Destroy()
    {
        this.view.OnCreateProgramClicked -= async (id) => await HandleCreateProgram(id);
        this.view.OnLoadProgramListRequested -= HandleLoadProgramList;
        this.view.OnProgramSelectedToLoad -= HandleProgramSelected;
        this.view.OnOpenProgramClicked -= async () => await HandleOpenProgram();
        this.view.OnSaveClicked -= HandleSaveProgram;
        this.view.OnAddPointClicked -= HandleAddPoint;
        this.tcpView.OnTCPupdateRequested -= HandleTCPViewUpdate;
    }
}