using NAudio.Wave;
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using UnityEngine;
using UnityEngine.Networking;

public class MediaPlayer : MonoBehaviour
{
    public static MediaPlayer Instance;
    public AudioSource audio_source;

    private void Awake()
    {
        Instance = this;
    }

    // Start is called before the first frame update
    void Start()
    {
        audio_source = UIScene.Instance.audio_source;
    }

    public string media;
    private void Update()
    {
        if (play_audio_while_loaded && !audio_loading)
        {
            play_audio_while_loaded = false;
            audio_source?.Play();
        }
    }

    /// <summary>
    /// 原加载音频
    /// </summary>
    /// <param name="_file_name"></param>
    /// <param name="_callback"></param>
    public void AudioLoad(string _file_name, Action<bool, string> _callback = null)
    {
        if (string.IsNullOrEmpty(_file_name))
        {
            if (_callback != null)
            {
                _callback(false, "无此音频:" + _file_name);
            }
            return;
        }
        audio_loading = true;
        var __res = MediaViwerPanel.file_dic.Find(x => x.file_name_text.text.Equals(_file_name));
        var url = "";
        if (null != __res)
        {
            url = __res.file_path;
        }
        else
        {
            if (_callback != null)
            {
                _callback(false, "无此音频:" + _file_name);
            }
            return;
        }

        FileInfo fileInfo = new FileInfo(@url);
        var directoryUrl = Path.Combine(System.Environment.CurrentDirectory + "/Cache");
        var cacheUrl = Path.Combine(System.Environment.CurrentDirectory + "/Cache", fileInfo.Name.Replace(".mp3", ".wav"));
        if (!Directory.Exists(directoryUrl))
        {
            Directory.CreateDirectory(directoryUrl);
        }

        if (!File.Exists(@cacheUrl))
        {
            using (var audioStrem = new Mp3FileReader(@url))
            {
                WaveFileWriter.CreateWaveFile(@cacheUrl, audioStrem);
            }
        }

        StartCoroutine(LoadAudio(@cacheUrl, fileInfo.Name, _callback));
    }

    /// <summary>
    /// 新加载音频
    /// </summary>
    /// <param name="_file_name"></param>
    /// <param name="_callback"></param>
    public void NewAudioLoad(string _file_name, Action<bool, string> _callback = null)
    {
        ConsolePanel.ConsoleOutput("正在加载语音", "log");
        if (File.Exists(_file_name))
        {
            //判断格式
            string ex = Path.GetExtension(_file_name);
            if(ex==".mp3")
            {
                var directoryUrl = Path.Combine(System.Environment.CurrentDirectory + "/Cache");
                var cacheUrl = Path.Combine(System.Environment.CurrentDirectory + "/Cache", Path.GetFileNameWithoutExtension(_file_name)+ ".wav");
                if (!Directory.Exists(directoryUrl))
                {
                    Directory.CreateDirectory(directoryUrl);
                }

                if (!File.Exists(@cacheUrl))
                {
                    using (var audioStrem = new Mp3FileReader(_file_name))
                    {
                        WaveFileWriter.CreateWaveFile(@cacheUrl, audioStrem);
                    }
                }

                StartCoroutine(LoadAudio(@cacheUrl,Path.GetFileName(cacheUrl) , _callback));
            }
            else if(ex == ".wav")
            {
                StartCoroutine(LoadAudio(_file_name, Path.GetFileName(_file_name), _callback));
            }
            else
            {
                if (_callback != null)
                {
                    _callback(false, "音频格式不支持:" + ex);
                }
            }
        }
        else
        {
            if (_callback != null)
            {
                _callback(false, "无此音频:" + _file_name);
            }
        }
    }


    bool audio_loading;
    /// <summary>
    /// 加载音频
    /// </summary>
    /// <param name="_url"></param>
    /// <returns></returns>
    private IEnumerator LoadAudio(string _url, string _file_name, Action<bool, string> _callback = null)
    {
        audio_loading = true;
        using (UnityWebRequest request = UnityWebRequestMultimedia.GetAudioClip(@_url, AudioType.WAV))
        {
            yield return request.SendWebRequest();

            var audio_clip = DownloadHandlerAudioClip.GetContent(request);
            if (audio_clip != null)
                audio_source.clip = audio_clip;
            audio_loading = false;
            _callback?.Invoke(true, Path.GetFileNameWithoutExtension(_file_name));
        }
    }

    /// <summary>
    /// 加载完毕后播放
    /// </summary>
    bool play_audio_while_loaded;
    /// <summary>
    /// 播放音乐
    /// </summary>
    public void AudioPlay()
    {
        if (audio_source?.clip != null && !audio_loading)
            audio_source?.Play();
        else
            play_audio_while_loaded = true;
    }

    public void AudioPause()
    {
        audio_source?.Pause();
    }

    public void AudioStop()
    {
        audio_source?.Stop();
    }

    public void AudioSetVolume(float _volume)
    {
        if (audio_source)
            audio_source.volume = _volume;
    }
}