using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.EventSystems;
using UnityEngine.UI;

public class RecordVoiceUI : MonoBehaviour
{
    [SerializeField] GameObject effects;
    /// <summary>
    /// 语音输入的按钮
    /// </summary>
    [SerializeField] private Button m_VoiceInputBotton;
    /// <summary>
    /// 录音按钮的文本
    /// </summary>
    [SerializeField] private Text m_VoiceBottonText;
    /// <summary>
    /// 录音的提示信息
    /// </summary>
    [SerializeField] private Text m_RecordTips;

    public Button stopBtn;

    public AudioRecorder voiceInputs;

    public CarAssistant carAssistant;

    public event UnityAction onStartListen;
    public event UnityAction onStopListen;

    private void Awake()
    {
    }

    // Start is called before the first frame update
    void Start()
    {
        effects.gameObject.SetActive(false);
        RegistButtonEvent();
        carAssistant.onReceiveText += SetRecordTips;

        stopBtn.onClick.AddListener(StopPlay);
        stopBtn.gameObject.SetActive(false);
        carAssistant.statusManager.onCurrentStatusChanged += (s) =>
        {
            if (s == carAssistant.statusManager.talking)
            {
                stopBtn.gameObject.SetActive(true);
            }
            else
            {
                stopBtn.gameObject.SetActive(false);
            }
        };
    }

    // Update is called once per frame
    void Update()
    {
        if(carAssistant.statusManager.currentState == carAssistant.statusManager.listening)
        {
            if (!effects.active)
            {
                effects.SetActive(true);
            }
        }
        else
        {
            if (effects.active)
            {
                effects.SetActive(false);
            }
        }
    }

    public void SetRecordTips(string _msg)
    {
        m_RecordTips.text = _msg;
        StartCoroutine(SetTextVisible(m_RecordTips));
    }
    private IEnumerator SetTextVisible(Text _textbox)
    {
        yield return new WaitForSeconds(3f);
        _textbox.text = "";
    }

    public void StopPlay()
    {
        if(carAssistant.statusManager.currentState == carAssistant.statusManager.talking)
            carAssistant.statusManager.MakeTransition(carAssistant.statusManager.idle);
    }

    /// <summary>
    /// 注册按钮事件
    /// </summary>
    private void RegistButtonEvent()
    {
        if (m_VoiceInputBotton == null || m_VoiceInputBotton.GetComponent<EventTrigger>())
            return;

        EventTrigger _trigger = m_VoiceInputBotton.gameObject.AddComponent<EventTrigger>();

        //添加按钮按下的事件
        EventTrigger.Entry _pointDown_entry = new EventTrigger.Entry();
        _pointDown_entry.eventID = EventTriggerType.PointerDown;
        _pointDown_entry.callback = new EventTrigger.TriggerEvent();

        //添加按钮松开事件
        EventTrigger.Entry _pointUp_entry = new EventTrigger.Entry();
        _pointUp_entry.eventID = EventTriggerType.PointerUp;
        _pointUp_entry.callback = new EventTrigger.TriggerEvent();

        //添加委托事件
        _pointDown_entry.callback.AddListener(delegate { StartRecord(); });
        _pointUp_entry.callback.AddListener(delegate { StopRecord(); });

        _trigger.triggers.Add(_pointDown_entry);
        _trigger.triggers.Add(_pointUp_entry);
    }

    void StartRecord()
    {
        m_VoiceBottonText.text = "listening...";
        effects.gameObject.SetActive(true);
        if (onStartListen != null) onStartListen();
    }

    void StopRecord()
    {
        m_VoiceBottonText.text = "hold to talk";
        m_RecordTips.text = "identifying...";
        effects.gameObject.SetActive(false);
        if (onStopListen != null) onStopListen();
    }
}