PlaylistShared/PlaylistShared.Pwa/Components/Global/AudioPlayer.razor

@using Microsoft.JSInterop
@inject IAudioPlayerService AudioPlayerService
@inject IJSRuntime JS
@inject TokenStorage TokenStorage
@inject PlayerStorage PlayerStorage
@inject AuthenticationStateProvider AuthProvider
@inject ISnackbar Snackbar
@inject HttpClient Http

<MudPaper Class="pa-2" Elevation="0" Width="100%" Style="background-color: rgba(0,0,0,0.05); border-radius: 8px;">
    <MudStack Row AlignItems="AlignItems.Center" Wrap="Wrap.Wrap">
        <!-- Кнопки управления -->
        <MudItem @onmouseenter="() => { _isPlayHovered = true; }"
                 @onmouseleave="() => { _isPlayHovered = false; }"
                 style="position: relative; display: inline-block; cursor: pointer; border-radius: 4px; overflow: hidden; width: 50px; height: 50px;">
    
            @if (!string.IsNullOrEmpty(AudioPlayerService.CurrentTrackCoverUrl))
            {
                <MudImage Src="@AudioPlayerService.CurrentTrackCoverUrl.FormatCoverUrl(50, 50)" Height="50" Width="50" Class="rounded" Style="display: block;" />
            }
    
            <MudItem class="play-overlay"
                     style="position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: transparent; display: flex; align-items: center; justify-content: center; border-radius: 4px;">
                <MudToggleIconButton Toggled="@AudioPlayerService.IsPlaying"
                                     Icon="@Icons.Material.Filled.PlayArrow"
                                     Color="@Color.Primary"
                                     ToggledIcon="@Icons.Material.Filled.Pause"
                                     ToggledColor="@Color.Primary"
                                     ToggledChanged="OnPlayClick" />
            </MudItem>
        </MudItem>
                
        <!-- Название и прогресс -->
        <MudStack AlignItems="AlignItems.Stretch" Class="d-flex flex-grow-1 relative overflow-hidden align-center rounded-sm" Style="height: 50px;">
            <MudItem Class="absolute " style="top: 0; left: 0; right: 0; bottom: 0; z-index: 1;">
                <TrackProgress Value="@AudioPlayerService.CurrentProgress"
                               Min="0" Max="100"
                               Height="50"
                               BufferValue="@_bufferValue"
                               Color="Color.Primary"
                               Icon=""
                               Step="0.1"
                               Opacity="0.3"
                               Buffer
                               ValueChanged="SeekTo" />
            </MudItem>

            <MudStack Row AlignItems="AlignItems.Center" Class="px-3 relative pointer-events-none" Style="z-index: 2; width: 100%;">
                <MudText Typo="Typo.body2" Style="font-weight: 600; text-shadow: 0px 0px 4px rgba(255,255,255,0.8);">
                    @AudioPlayerService.CurrentTrackTitle
                </MudText>
                <MudSpacer />
                <MudText Typo="Typo.body2" Style="font-family: monospace; font-weight: 600;">
                    @AudioPlayerService.CurrentTimeString / @AudioPlayerService.TotalTimeString
                </MudText>
            </MudStack>
        </MudStack>
            
        <!-- Громкость -->
        <MudItem @onmouseenter="() => _volumeIsOpen = true"
                 @onmouseleave="() => _volumeIsOpen = false"
                @onwheel="OnVolumeHandleWheel"
                Style="position: relative; display: flex; align-items: center;">
                
            <MudIconButton Icon="@(AudioPlayerService.CurrentVolume == 0 ? Icons.Material.Filled.VolumeOff : Icons.Material.Filled.VolumeUp)"
                            Size="Size.Small" 
                            Color="Color.Default" 
                            OnClick="ToggleMute" />

            <MudPopover Open="@_volumeIsOpen"
                        AnchorOrigin="Origin.TopCenter" 
                        TransformOrigin="Origin.BottomCenter" 
                        Fixed
                        Class="pa-0 mt-n5"
                        Style="height:120px; width: 10px; background-color: transparent !important; overflow: visible !important;">
                <MudProgressLinear Vertical Color="Color.Primary" Size="Size.Medium" Value="@AudioPlayerService.CurrentVolume" />

            </MudPopover>
        </MudItem>
    </MudStack>
</MudPaper>

<audio id="@_audioId" style="display: none;"></audio>

@code {
    private const double _volumeDefault = 50;

    // Генерируем уникальный ID для аудиоэлемента, чтобы избежать конфликтов при множественных экземплярах
    private string _audioId = $"audio_{Guid.NewGuid():N}";
    private IJSObjectReference? _audioModule;
    private IJSObjectReference? _audioElement;

    // Громкость
    private bool _volumeIsOpen;
    private double _volumeBeforeMute;
    private double _bufferValue;

    private bool _isPlayHovered;

    protected override async Task OnInitializedAsync()
    {
        AudioPlayerService.OnLoadAndPlayRequested += OnServiceLoadAndPlay;
        AudioPlayerService.OnPlayRequested += OnServicePlay;
        AudioPlayerService.OnPauseRequested += OnServicePause;
        AudioPlayerService.OnSeekRequested += OnServiceSeek;
        AudioPlayerService.OnVolumeChangeRequested += OnServiceVolumeChange;
        AudioPlayerService.OnStateChanged += OnServiceStateChanged;
    }

    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        if (firstRender)
        {
            await EnsureAudioModuleAsync();
        }
    }

    private async Task EnsureAudioModuleAsync()
    {
        if (_audioModule == null)
            _audioModule = await JS.InvokeAsync<IJSObjectReference>("import", "/js/AudioPlayer.js");
        if (_audioElement == null)
            _audioElement = await _audioModule.InvokeAsync<IJSObjectReference>("init", _audioId, DotNetObjectReference.Create(this));
    }

    [JSInvokable]
    public async Task OnAudioEnded()
    {
        AudioPlayerService.NotifyTrackEnded();
    }

    [JSInvokable]
    public async Task OnTimeUpdate(double currentTime, double duration)
    {
        if (!double.IsNaN(duration) && !double.IsNaN(currentTime) && duration > 0)
        {
            AudioPlayerService.UpdateProgress(currentTime, duration);
        }
    }

    [JSInvokable]
    public async Task OnDownloadProgress(double second)
    {
        _bufferValue = second / AudioPlayerService.TotalTime * 100;
    }

    private async Task<bool> CheckAuthAsync()
    {
        var authState = await AuthProvider.GetAuthenticationStateAsync();
        if (!authState.User.Identity?.IsAuthenticated == true)
        {
            Snackbar.Add("Воспроизведение доступно только авторизованным пользователям", Severity.Warning);
            return false;
        }
        return true;
    }

    #region Обработка сервиса
    private async Task OnServiceLoadAndPlay(string trackId, string? accessToken, string? sharedPlaylistId)
    {
        if (string.IsNullOrWhiteSpace(accessToken))
        {
            var tokens = await TokenStorage.GetTokensAsync();
            accessToken = tokens.token;
        }

        if (string.IsNullOrWhiteSpace(accessToken) && string.IsNullOrWhiteSpace(sharedPlaylistId))
        {
            Snackbar.Add("Токен авторизации не найден. Пожалуйста, войдите заново.", Severity.Error);
            return;
        }

        var streamUrl = new Uri(Http.BaseAddress!, $"/api/audio/track/{trackId}").ToString();
        await EnsureAudioModuleAsync();
        await _audioElement!.InvokeVoidAsync("loadAndPlay", streamUrl, accessToken, sharedPlaylistId);
    }

    private async Task OnServicePlay()
    {
        if (_audioElement == null) return;
        await _audioElement.InvokeVoidAsync("play");
    }

    private async Task OnServicePause()
    {
        if (_audioElement == null) return;
        await _audioElement.InvokeVoidAsync("pause");
    }

    private async Task OnServiceSeek(double time)
    {
        if (_audioElement == null) return;
        try
        {
            await _audioElement.InvokeVoidAsync("setCurrentTime", time);
        }
        catch (Exception ex)
        {
            Console.WriteLine($"Seek error: {ex.Message}");
        }
    }

    private async Task OnServiceVolumeChange(double volume)
    {
        if (_audioElement == null) return;
        if (volume == AudioPlayerService.CurrentVolume) return;

        try
        {
            await _audioElement.InvokeVoidAsync("setVolume", volume / 100);
            StateHasChanged();
        }
        catch (Exception ex)
        {
            Console.WriteLine($"Volume change error: {ex.Message}");
        }
    }

    private void OnServiceStateChanged()
    {
        InvokeAsync(StateHasChanged);
    }
    #endregion

    private async Task OnVolumeHandleWheel(WheelEventArgs e)
    {
        // Изменяем громкость на 5 единиц за один тик колесика
        double step = 5;
        double newVolume = e.DeltaY < 0
            ? Math.Min(AudioPlayerService.CurrentVolume + step, 100)
            : Math.Max(AudioPlayerService.CurrentVolume - step, 0);

        await ChangeVolume(newVolume);
    }

    private async Task SeekTo(double value)
    {
        await AudioPlayerService.SeekToAsync(value);
    }

    private async Task ChangeVolume(double value)
    {
        await AudioPlayerService.SetVolumeAsync(value);
    }

    private async Task ToggleMute()
    {
        if (AudioPlayerService.CurrentVolume > 0)
        {
            _volumeBeforeMute = AudioPlayerService.CurrentVolume;
            await AudioPlayerService.SetVolumeAsync(0);
        }
        else
        {
            await AudioPlayerService.SetVolumeAsync(_volumeBeforeMute);
            _volumeBeforeMute = 0;
        }
    }

    private async Task OnPlayClick()
    {
        if (AudioPlayerService.IsPlaying)
            await AudioPlayerService.PauseAsync();
        else
            await AudioPlayerService.PlayAsync();
    }

    public async ValueTask DisposeAsync()
    {
        try
        {
            if (_audioElement != null)
                await _audioElement.DisposeAsync();
            if (_audioModule != null)
                await _audioModule.DisposeAsync();
        }
        catch { }
    }
}