using Edia;
using UnityEngine;
using UnityEngine.UI;
using TMPro;
using UXF;
using System.Collections.Generic;

public class TaskNavigation : XBlock {
    /*
     * Xblock order of execution:
     * 1. OnBlockStart
     * 2. OnTrialStart
     * 3. first step method
     * 4. InBetweenSteps
     * 5. next step method
     * 6. ...
     * 7. OnTrialEnd
     * 8. OnBlockEnd
     * 9. OnBlockOutro
     */

    [SerializeField] private VideoClipPicker videoPicker;
    [SerializeField] private Material skybox360Video;
    private int _currentVideoIndex;

    [SerializeField] private ScreenInVR messageCanvas;
    [SerializeField] private Button doneButton;
    [SerializeField] private TextMeshProUGUI timerText;

    [Header("Cheat Controls")]
    [SerializeField] private GameObject cheatPanel;
    [SerializeField] private List<Button> videoButtons;
    [SerializeField] private Button playResumeButton;


    private float _timer;
    private bool _isNavigating;

    private void Awake() {
        /*
            Each trial exists out of a sequence of steps.
            Each step is a standalone part of the experiment task.
            I.e. Show a message to the user, show a fixation cross, wait for user input, etc.
            In order to use the steps, they need to be defined in the trial sequence.

            A common approach within a trial is as follows:
        */

        RenderSettings.skybox = null;
        DynamicGI.UpdateEnvironment();

        AddToTrialSequence(Setup); //      #1 Set up environment / Generate Stimuli / etc
        AddToTrialSequence(ShowVideoReference);
        AddToTrialSequence(PlayVideoReference);
        AddToTrialSequence(FinishedPlayingVideo);
        AddToTrialSequence(Cleanup);
    }

    private void Update()
    {
        if (_isNavigating)
        {
            _timer += Time.deltaTime;
            timerText.text = _timer.ToString("F2");
        }

    }

#region TASK STEPS

    /*
        The framework provides a set of tools to make it easier to implement the task.
        For example:
        * XRManager.Instance.xxxxx => All things XR related
        * Experiment.instance.xxxxx => All things related to the progress of the experiment, logging data, etc

        See documentation for more details.
    */

    // -------------------------------------------------------------------------------------------
    // #1
    /// <summary>Prepare and show stimuli</summary>
    [ContextMenu("Setup")]
    void Setup() {
        /*
         * A step always ends with either a 'PROCEED' and/or 'WAITONPROCEED'
         */

        Camera.main.clearFlags = CameraClearFlags.Skybox;

        _timer = 0;
        _isNavigating = false;
        timerText.text = "0.0";
        messageCanvas.Show(true);
        
        for (int i = 0; i < videoButtons.Count; i++)
        {
            int index = i; // Capture the current value of i
            videoButtons[i].onClick.AddListener(() => ForceChangeVideoReference(index));
        }
        playResumeButton.onClick.AddListener(PauseResumeVideo);
        doneButton.onClick.AddListener(NavigationDone);

        XRManager.Instance.EnableAllInteraction(true);

        Experiment.Instance.WaitOnProceed();
    }

    private void PauseResumeVideo()
    {
        videoPicker.TogglePause();
        Experiment.Instance.StoreMarker("VideoPaused" + _timer.ToString("F2"));
    }

    private void NavigationDone()
    {
        _isNavigating = false;

        Experiment.Instance.AddToTrialResults("Index", "Video_" + _currentVideoIndex);
        Experiment.Instance.AddToTrialResults("NavigationTime", _timer.ToString("F2"));

        Experiment.Instance.WaitOnProceed();
    }

    private void ShowVideoReference() {
        var videoIndex = Session.instance.CurrentTrial.settings.GetInt("videoId");

        _currentVideoIndex = videoIndex;

        // Show 360 skybox
        RenderSettings.skybox = skybox360Video;
        DynamicGI.UpdateEnvironment();

        videoPicker.SelectClip(videoIndex);
        videoPicker.StartCountdown(); // start on the first frame; press Proceed to Play

        // Add results and relevant data to trial results
        Experiment.Instance.AddToTrialResults("Navigating Video ID", _currentVideoIndex.ToString());
        Experiment.Instance.WaitOnProceed();
    }

    void PlayVideoReference()
    {
         _isNavigating = true;

        // Resume video
        videoPicker.Resume();
        Experiment.Instance.StoreMarker("Playing video " + _currentVideoIndex);

        Experiment.Instance.WaitOnProceed();
    }

    void FinishedPlayingVideo()
    {
        _isNavigating = false;
        Experiment.Instance.StoreMarker("Finished video " + _currentVideoIndex);

        Experiment.Instance.WaitOnProceed();
    }

    private void Cleanup()
    {
        doneButton.onClick.RemoveAllListeners();
        messageCanvas.Show(false);

        Camera.main.clearFlags = CameraClearFlags.SolidColor;

        foreach (var button in videoButtons)
        {
            button.onClick.RemoveAllListeners();
        }
        
        cheatPanel.SetActive(false);

        RenderSettings.skybox = null;
        DynamicGI.UpdateEnvironment();

        Experiment.Instance.WaitOnProceed();
    }

    private void ForceChangeVideoReference(int videoIndex)
    {
        _currentVideoIndex = videoIndex;

        videoPicker.SelectClip(_currentVideoIndex);
        videoPicker.StartCountdown();
        videoPicker.Resume();
        Experiment.Instance.StoreMarker("Forced Change to Video " + _currentVideoIndex);
    }

#endregion

#region STATEMACHINE OVERRIDES

    public override void OnBlockStart() {
        /*
         * Shows message to the user if there is a value defined in the configs with the key "_intro"
         */

    }

    public override void OnStartTrial() {
    }

    public override void OnEndTrial() {
    }

    public override void OnBetweenSteps() {
    }

    public override void OnBlockEnd()
    {
        /*
         * Shows message to the user if there is a value defined in the configs with the key "_outro"
         */

    }

    public override void OnBlockOutro() {
       
    }

#endregion
}