@page "/UserCP/{CompanyID:int}"
@page "/UserCP/{CompanyID:int}/{ChatID:int?}"
@using Common.Dtos.Company
@using Common.Dtos.Conversation
@using Common.Dtos.Group
@using HushianWebApp.Service
@using HushianWebApp.Services
@using Microsoft.AspNetCore.SignalR.Client;
@using System.Threading;

@inject NavigationManager NavigationManager
@inject ChatService ChatService
@inject ILocalStorageService localStorageService;
@inject AuthService authService;
@inject BaseController baseController;
@inject CompanyService companyService
@inject UserService userService
@inject GroupService groupService
@inject ChatService chatService
@inject IJSRuntime JS
@inject ToastService toastService
@inject HttpClient _Http;
@layout UserPanelLayout
<ConfirmDialog @ref="dialog" />

<div class="container-fluid">
    <div class="row" style="height:85vh">
        @if (IsEndFirstProcess)
        {
            @if (IsLogin)
            {
                <div class="col-md-12 d-flex flex-column" id="B">
                    <div class="input-group">
                        @if (LastOpenChat != null)
                        {
                            <p type="text" class="form-control fw-bold text-primary" style="border:none;align-self: center;" aria-describedby="basic-addon1">@ExperYou</p>
                        }
                        <div class="d-flex gap-2 ms-auto">
                            @if (LastOpenChat != null)
                            {
                                @if (LastOpenChat.status == Common.Enums.ConversationStatus.InProgress)
                                {
                                    <Button Color="ButtonColor.Danger" Size=ButtonSize.ExtraSmall Outline="true" @onclick="CloseChat" Class="finish-conversation-btn">
                                        <Icon Name="IconName.Escape" Class="me-1" /> اتمام گفتگو
                                    </Button>
                                }
                                <Button Color="ButtonColor.Success" Size=ButtonSize.ExtraSmall Outline="true" @onclick="NewChat" Class="new-conversation-btn">
                                    <Icon Name="IconName.ChatDots" Class="me-1" /> گفتگو جدید
                                </Button>
                            }
                            <Button Color="ButtonColor.Secondary" Size=ButtonSize.ExtraSmall Outline="true" @onclick="Logout" Class="logout-btn">
                                <Icon Name="IconName.BoxArrowRight" Class="me-1" /> خروج
                            </Button>
                        </div>
                    </div>
                    <!-- B1: Chat area -->
                    <div class="flex-fill chat-area-container" id="B1">
                        @if (LastOpenChat != null && LastOpenChat.Responses != null)
                        {
                            <div class="chat-container p-3">
                                @{
                                    bool target = false;
                                }
                                @foreach (var msg in LastOpenChat?.Responses)
                                {
                                    @if (!target && ((!msg.IsRead && msg.Type != Common.Enums.ConversationType.UE) || LastOpenChat.Responses.Last() == msg))
                                    {
                                        target = true;
                                        <div id="target" class="chat-separator">
                                            @if (!msg.IsRead && msg.Type != Common.Enums.ConversationType.UE)
                                            {
                                                <div class="separator-line new-message">
                                                    <span class="separator-text">پیام جدید</span>
                                                </div>
                                            }
                                        </div>
                                    }

                                    <div class="d-flex mb-2 @(msg.Type!=Common.Enums.ConversationType.UE ? "justify-content-end" : "justify-content-start")">
                                        <div class="chat-bubble @(msg.Type!=Common.Enums.ConversationType.UE ? "chat-mine": "chat-other")" data-id="@msg.ID">
                                            @if (msg.FileContent != null && msg.FileContent.Length > 0 && !string.IsNullOrWhiteSpace(msg.FileType))
                                            {
                                                @if (msg.FileType.StartsWith("image/"))
                                                {
                                                    <a href="@GetImageDataUrl(msg.FileType, msg.FileContent)" download="@GetDownloadFileName(msg.FileName, msg.FileType)" title="دانلود تصویر" style="display:inline-block">
                                                        <img src="@GetImageDataUrl(msg.FileType, msg.FileContent)" alt="image" style="max-width: 220px; border-radius: 8px; display: block; cursor: pointer;" />
                                                    </a>
                                                }
                                                else if (msg.FileType.StartsWith("audio/"))
                                                {
                                                    <div class="audio-message">
                                                        <audio controls style="max-width: 250px;">
                                                            <source src="@GetAudioDataUrl(msg.FileType, msg.FileContent)" type="@msg.FileType">
                                                            مرورگر شما از پخش صدا پشتیبانی نمی‌کند.
                                                        </audio>
                                                        <div class="audio-info">
                                                            <small class="text-muted">@GetAudioDuration(msg.FileContent)</small>
                                                        </div>
                                                    </div>
                                                }
                                                @if (!string.IsNullOrWhiteSpace(msg.text))
                                                {
                                                    <div style="margin-top:6px">@msg.text</div>
                                                }
                                            }
                                            else
                                            {
                                                @msg.text
                                            }
                                        </div>
                                        @if (msg.Type == Common.Enums.ConversationType.UE)
                                        {
                                            if (msg.IsRead)
                                            {
                                                <Icon Style="align-self: self-end;" Name="IconName.CheckAll" Size="IconSize.x5" Color="IconColor.Success" />
                                            }
                                            else
                                            {
                                                <Icon Style="align-self: self-end;" Name="IconName.CheckLg" Size="IconSize.x5" />
                                            }
                                        }
                                    </div>
                                }
                                @{
                                    target = false;
                                }
                            </div>
                        }
                        else
                        {
                            <div class="d-flex justify-content-center align-items-center flex-column" style="height: 80%;">
                                <Spinner Type="SpinnerType.Dots" Color="SpinnerColor.Primary" Visible="@chatloading" />
                                <p style="margin-top: 15px; font-size: 1.5rem; color: #0d6efd; font-weight: bold; text-shadow: 1px 1px 2px rgba(0,0,0,0.2);">
                                    هوشیان
                                </p>

                                @if (CompanyGroups != null && CompanyGroups.Any())
                                {
                                    <div class="groups-container mt-4">
                                        <h6 class="text-center mb-3 text-muted">انتخاب گروه:</h6>
                                        <div class="groups-grid">
                                            @foreach (var group in CompanyGroups)
                                            {
                                                <div class="group-card @(GroupID == group.ID ? "selected" : "")"
                                                @onclick="() => SelectGroup(group.ID)">
                                                    <div class="group-card-content">
                                                        @if (group.img == null || group.img.Length == 0)
                                                        {
                                                            <Icon Name="IconName.People" Class="group-icon" />
                                                        }
                                                        else
                                                        {
                                                            <Image src="@GetImageSource(group.img)" class="rounded mx-2" height="50" width="50" alt="Uploaded Image" />

                                                        }
                                                        <span class="group-name">@group.Name</span>
                                                    </div>
                                                </div>
                                            }
                                        </div>
                                    </div>
                                }
                            </div>
                        }

                    </div>

                    @if (LastOpenChat == null || (LastOpenChat != null && LastOpenChat.status != Common.Enums.ConversationStatus.Finished && LastOpenChat.Responses != null))
                    {
                        <!-- B2: Message input -->
                        <div class="message-input-container" id="B2">
                            <div class="input-wrapper">
                                <input type="text" @bind-value="MsgInput" class="message-input" placeholder="پیام خود را بنویسید..." @onkeydown="HandleKeyDown" />
                                <InputFile id="chatImageInput" style="display:none" OnChange="OnImageSelected" accept="image/*" />
                                <Button Color="ButtonColor.Secondary" Size=ButtonSize.Small Outline="true" @onclick="OpenFileDialog" Class="attach-btn" title="افزودن تصویر">
                                    <Icon Name="IconName.Image" />
                                </Button>

                                <!-- Audio Recording Button -->
                                <Button Color="@(IsRecording ? ButtonColor.Danger : ButtonColor.Secondary)" 
                                Size=ButtonSize.Small 
                                Outline="true" 
                                @onclick="ToggleAudioRecording"
                                class=@($"audio-btn {(IsRecording ? "recording" : "")}")
                                title="@(IsRecording ? "توقف ضبط" : "ضبط صدا")"
                                >
                                    @if (IsRecording)
                                    {
                                        <Icon Name="IconName.StopCircle" Class="recording-pulse" />
                                    }
                                    else
                                    {
                                        <Icon Name="IconName.Mic" />
                                    }
                                </Button>

                                <Button Color="ButtonColor.Primary" Size=ButtonSize.Small @onclick="OnClickSendMsg" Class="send-btn" title="ارسال">
                                    <Icon Name="IconName.Send" />
                                </Button>
                            </div>

                            <!-- Image Preview -->
                            @if (SelectedImagePreview != null)
                            {
                                <div class="mt-2 d-flex align-items-center gap-2">
                                    <img src="@SelectedImagePreview" alt="preview" style="max-height:60px;border-radius:8px;border:1px solid #e9ecef;" />
                                    <Button Color="ButtonColor.Secondary" Size=ButtonSize.ExtraSmall Outline="true" @onclick="ClearSelectedImage">حذف تصویر</Button>
                                </div>
                            }

                            <!-- Audio Preview -->
                            @if (RecordedAudioBytes != null)
                            {
                                <div class="mt-2 d-flex align-items-center gap-2 audio-preview">
                                    <div class="audio-preview-controls">
                                        <audio controls style="max-width: 250px;">
                                            <source src="@RecordedAudioUrl" type="audio/wav">
                                        </audio>
                                        <div class="audio-preview-info">
                                            <small class="text-muted">@RecordedAudioDuration</small>
                                        </div>
                                    </div>
                                    <Button Color="ButtonColor.Danger" Size=ButtonSize.ExtraSmall Outline="true" @onclick="ClearRecordedAudio">حذف صدا</Button>
                                </div>
                            }

                            <!-- Recording Status -->
                            @if (IsRecording)
                            {
                                <div class="mt-2 recording-status">
                                    <div class="recording-indicator">
                                        <span class="recording-dot"></span>
                                        <span class="recording-text">در حال ضبط... @RecordingTime</span>
                                    </div>
                                </div>
                            }
                        </div>
                    }


                </div>
            }
            else
            {
                <div class="d-flex justify-content-center align-items-center" style="height: 100%;">
                    <div class="login-container p-4 bg-white rounded shadow-sm" style="max-width: 400px; width: 100%;">
                        <div class="text-center mb-4">
                            <h4 class="text-primary mb-2">ورود به سیستم</h4>
                        </div>
                        <LoginComponent OnMultipleOfThree="EventCallback.Factory.Create(this, Afterlogin)" />
                    </div>
                </div>
            }
        }
        else
        {
            <div class="d-flex justify-content-center align-items-center" style="height: 100%;">
                <div class="text-center">
                    <Spinner Type="SpinnerType.Dots" Color="SpinnerColor.Primary" />
                    <p class="mt-3 text-muted">در حال بررسی وضعیت ...</p>
                </div>
            </div>
        }
    </div>
</div>
@code {
    [Parameter] public int CompanyID { get; set; }
    [Parameter] public int? ChatID { get; set; }
    private ConfirmDialog dialog = default!;
    private HubConnection? hubConnection;
    private bool _shouldObserveVisibility = false;
    int? GroupID = null;
    ReadANDUpdate_CompanyDto? CompanyInfo = new();
    Common.Dtos.CurrentUserInfo CurrentUser = new();
    List<Read_GroupDto> CompanyGroups = new();
    ChatItemDto? LastOpenChat = new();
    string MsgInput = string.Empty;
    IBrowserFile? SelectedImageFile = null;
    byte[]? SelectedImageBytes = null;
    string? SelectedImagePreview = null;

    // Audio recording properties
    bool IsRecording = false;
    string RecordingTime = "00:00";
    byte[]? RecordedAudioBytes = null;
    string? RecordedAudioUrl = null;
    string RecordedAudioDuration = "00:00";
    private System.Threading.Timer? recordingTimer;
    private DateTime recordingStartTime;

    bool chatloading = false;
    public bool IsLogin { get; set; } = false;
    public bool IsEndFirstProcess { get; set; } = false;
    string ExperYou
    {
        get
        {
            if (CompanyInfo == null) return string.Empty;
            string value = $"{CompanyInfo.FullName}";
            if (GroupID.HasValue)
            {
                value += "/" + CompanyGroups.FirstOrDefault(f => f.ID == GroupID.GetValueOrDefault()).Name;

            }
            if (LastOpenChat != null)
            {
                var model = LastOpenChat.Responses.OrderBy(o => o.ID).LastOrDefault(l => l.Type != Common.Enums.ConversationType.UE);

                if (model!=null && model.Type==Common.Enums.ConversationType.CU && !string.IsNullOrEmpty(CompanyInfo.FullNameManager))
                {
                    value += "/" + CompanyInfo.FullNameManager;
                }
                else
                if (!string.IsNullOrEmpty(LastOpenChat.ExperFullName))
                    value += "/" + LastOpenChat.ExperFullName;
            }
            return value;
        }
    }

    // Audio recording methods
    private async Task ToggleAudioRecording()
    {
        if (IsRecording)
        {
            await StopAudioRecording();
        }
        else
        {
            await StartAudioRecording();
        }
    }

    private async Task StartAudioRecording()
    {
        try
        {
            var result = await JS.InvokeAsync<bool>("startAudioRecording");
            if (result)
            {
                IsRecording = true;
                recordingStartTime = DateTime.Now;
                recordingTimer = new System.Threading.Timer(UpdateRecordingTime, null, 0, 1000);
                StateHasChanged();
            }
            else
            {
                toastService.Notify(new ToastMessage(ToastType.Warning, "خطا در شروع ضبط صدا"));
            }
        }
        catch (Exception ex)
        {
            toastService.Notify(new ToastMessage(ToastType.Danger, $"خطا در ضبط صدا: {ex.Message}"));
        }
    }

    private async Task StopAudioRecording()
    {
        try
        {
            var audioData = await JS.InvokeAsync<string>("stopAudioRecording");
            if (!string.IsNullOrEmpty(audioData))
            {
                // Convert base64 to bytes
                var base64Data = audioData.Split(',')[1];
                RecordedAudioBytes = Convert.FromBase64String(base64Data);
                RecordedAudioUrl = audioData;
                RecordedAudioDuration = RecordingTime;

                IsRecording = false;
                recordingTimer?.Dispose();
                recordingTimer = null;
               await ClearSelectedImage();
                StateHasChanged();
            }
        }
        catch (Exception ex)
        {
            toastService.Notify(new ToastMessage(ToastType.Danger, $"خطا در توقف ضبط صدا: {ex.Message}"));
        }
        finally
        {
            IsRecording = false;
            recordingTimer?.Dispose();
            recordingTimer = null;
            StateHasChanged();
        }
    }

    private void UpdateRecordingTime(object? state)
    {
        var elapsed = DateTime.Now - recordingStartTime;
        RecordingTime = $"{elapsed.Minutes:D2}:{elapsed.Seconds:D2}";
        InvokeAsync(StateHasChanged);
    }

    private Task ClearRecordedAudio()
    {
        RecordedAudioBytes = null;
        RecordedAudioUrl = null;
        RecordedAudioDuration = "00:00";
        return Task.CompletedTask;
    }

    private string GetAudioDataUrl(string? fileType, byte[]? content)
        => (string.IsNullOrWhiteSpace(fileType) || content == null || content.Length == 0)
            ? string.Empty
            : $"data:{fileType};base64,{Convert.ToBase64String(content)}";

    private string GetAudioDuration(byte[]? content)
    {
        // Simple duration calculation based on file size (approximate)
        if (content == null || content.Length == 0) return "00:00";

        // Assuming 16-bit PCM at 44.1kHz, mono
        var bytesPerSecond = 44100 * 2; // 44.1kHz * 2 bytes per sample
        var durationSeconds = content.Length / bytesPerSecond;
        var minutes = durationSeconds / 60;
        var seconds = durationSeconds % 60;
        return $"{minutes:D2}:{seconds:D2}";
    }
}
@functions {
    async Task OnClickSendMsg()
    {
        if (!string.IsNullOrEmpty(MsgInput) || SelectedImageFile != null || RecordedAudioBytes != null)
        {
            if (LastOpenChat != null)
            {
                Common.Enums.ConversationType type = Common.Enums.ConversationType.UE;
                ChatItemResponseDto? model;

                if (SelectedImageFile != null)
                {
                    var bytes = SelectedImageBytes ?? Array.Empty<byte>();
                    model = await chatService.ADDChatResponse(
                        LastOpenChat.ID,
                        MsgInput,
                        type,
                        SelectedImageFile.Name,
                        SelectedImageFile.ContentType,
                        bytes);
                }
                else if (RecordedAudioBytes != null)
                {
                    // Send audio message
                    var fileName = $"audio_{DateTimeOffset.Now.ToUnixTimeSeconds()}.wav";
                    model = await chatService.ADDChatResponse(
                        LastOpenChat.ID,
                        MsgInput,
                        type,
                        fileName,
                        "audio/wav",
                        RecordedAudioBytes);
                }
                else
                {
                    model = await chatService.ADDChatResponse(LastOpenChat.ID, MsgInput, type);
                }

                LastOpenChat?.Responses.Add(model);
                LastOpenChat.LastText = MsgInput;

            }
            else
            {
                //TODO New Chat
                var model = await chatService.NewChatFromCurrentUser(new ADD_ConversationDto()
                    {
                        CompanyID = CompanyID,
                        GroupID = GroupID,
                        Question = MsgInput,
                        UserID = 0
                    });
                if (model != null)
                {
                    LastOpenChat = model;
                }
                else toastService.Notify(new ToastMessage(ToastType.Danger, "خطا در گفتگو جدید"));


            }
            await Task.Yield();
            // Scroll to bottom for user's own messages
            await JS.InvokeVoidAsync("scrollToBottom", "B1");
            MsgInput = string.Empty;
            SelectedImageFile = null;
            SelectedImageBytes = null;
            SelectedImagePreview = null;

            // Clear recorded audio after sending
            RecordedAudioBytes = null;
            RecordedAudioUrl = null;
            RecordedAudioDuration = "00:00";

        }
    }
    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        if (_shouldObserveVisibility)
        {
            _shouldObserveVisibility = false;
            await JS.InvokeVoidAsync("observeVisibility", DotNetObjectReference.Create(this));
        }
    }
    protected override async Task OnInitializedAsync()
    {

        await IsOnline();
        //-------------hub
        var token = await localStorageService.GetItem<string>("U/key");
        string AddressHub = _Http.BaseAddress.AbsoluteUri.Replace("api/", "");

        hubConnection = new HubConnectionBuilder()
            .WithUrl($"{AddressHub}chatNotificationHub", options =>
            {
                options.AccessTokenProvider = () => Task.FromResult(token);
            })
            .WithAutomaticReconnect()
            .Build();

        hubConnection.On<ChatItemResponseDto>("ReceiveNewChatItemFromCompany",async (chatitem) =>
        {
            if (LastOpenChat.ID == chatitem.ChatItemID)
            {
                LastOpenChat.Responses.Add(chatitem);
                StateHasChanged();
                await MarkAsRead(chatitem.ID);
                // Scroll to target if exists, otherwise scroll to bottom
                await JS.InvokeVoidAsync("scrollToTargetOrBottom");
            }
        });
        //-------------------------------------
        hubConnection.On<int>("CheckMarkAsRead", async (chatresponseid) =>
        {
            if (LastOpenChat.Responses.Any(a=>a.ID==chatresponseid && !a.IsRead && a.Type==Common.Enums.ConversationType.UE))
            {
                LastOpenChat.Responses.First(a => a.ID == chatresponseid).IsRead = true;
                StateHasChanged();
            }
        });

        await hubConnection.StartAsync();
        //---------end hub
        await base.OnInitializedAsync();
    }
    async Task IsOnline()
    {
        var token = await localStorageService.GetItem<string>("U/key");
        if (string.IsNullOrEmpty(token))
        {
            IsLogin = false;
            IsEndFirstProcess = true;
        }
        else
        {
            await baseController.RemoveToken();
            await baseController.SetToken(token);
            if (!await authService.IsOnline())
            {
                await baseController.RemoveToken();
                IsLogin = false;
                IsEndFirstProcess = true;
            }
            else
            {
                IsEndFirstProcess = true;
                await Afterlogin();
            }

        }

    }
    async Task Afterlogin()
    {
        IsLogin = true;
        CurrentUser = await userService.GetCurrentUserInfo();
        await IsCompany();
    }
    async Task IsCompany()
    {
        CompanyInfo = await companyService.GetCompany(CompanyID);
        if (CompanyInfo != null)
            CompanyGroups = await groupService.GetGroupsCompany(CompanyID);
        await IsLastChat();
    }
    async Task IsLastChat()
    {
        if (CompanyInfo != null)
        {
            if (ChatID.HasValue) LastOpenChat = await ChatService.Getchat(ChatID.GetValueOrDefault());
            else LastOpenChat = LastOpenChat = await ChatService.GetLastOpenChatInCompany(CompanyID);

            if (LastOpenChat != null)
            {
                GroupID = LastOpenChat.GroupID;
                // Always set up visibility observation for chat bubbles
                _shouldObserveVisibility = true;
                StateHasChanged();

                // Wait for render to complete
                await Task.Delay(200);

                // Scroll to target if exists, otherwise scroll to bottom
                await JS.InvokeVoidAsync("scrollToTargetOrBottom");
            }
        }
    }
    [JSInvokable]
    public async Task MarkAsRead(int id)
    {
        var msg = LastOpenChat.Responses.FirstOrDefault(m => m.ID == id);
        if (msg != null && !msg.IsRead && msg.Type != Common.Enums.ConversationType.UE)
        {
            msg.IsRead = true;
            await chatService.MarkAsReadChatItemAsync(id);
            //  StateHasChanged();
        }
        await Task.CompletedTask;
    }
    // Method to handle new messages from other users
    public async Task HandleNewMessage()
    {
        if (LastOpenChat?.Responses != null)
        {
            var hasUnreadMessages = LastOpenChat.Responses.Any(m => !m.IsRead && m.Type != Common.Enums.ConversationType.UE);
            if (hasUnreadMessages)
            {
                await JS.InvokeVoidAsync("autoScrollToNewMessage");
            }
        }
    }
    async Task NewChat()
    {
        LastOpenChat = null;
    }
    async Task CloseChat()
    {
        var options = new ConfirmDialogOptions
            {
                YesButtonText = "بله",
                YesButtonColor = ButtonColor.Success,
                NoButtonText = "انصراف",
                NoButtonColor = ButtonColor.Danger
            };

        var confirmation = await dialog.ShowAsync(
            title: "پایان دادن به گفتگو",
            message1: "اطمینان دارید ؟",
            confirmDialogOptions: options);

        if (confirmation)
        {
            if (await chatService.ChatIsFinishFromUser(LastOpenChat.ID))
            {
                LastOpenChat.status = Common.Enums.ConversationStatus.Finished;
                StateHasChanged();
            }
        }



    }
    async Task Logout()
    {
        await baseController.RemoveToken();
        await localStorageService.RemoveItem("U/key");
        IsLogin = false;
        StateHasChanged();
    }
    async Task SelectGroup(int groupId)
    {
        GroupID = groupId;
        StateHasChanged();
    }
    private string GetImageSource(byte[] bytes)
            => $"data:image/jpeg;base64,{Convert.ToBase64String(bytes)}";
    private async Task HandleKeyDown(KeyboardEventArgs e)
    {
        if (e.Key == "Enter") await OnClickSendMsg();
    }

}
@functions {
    private async Task OpenFileDialog()
    {
        await JS.InvokeVoidAsync("triggerClick", "chatImageInput");
    }
    private async Task OnImageSelected(InputFileChangeEventArgs e)
    {
        var file = e.File;
        if (file is null)
        {
            SelectedImageFile = null;
            SelectedImageBytes = null;
            SelectedImagePreview = null;
            return;
        }

        SelectedImageFile = file;
        using var memoryStream = new MemoryStream();
        await file.OpenReadStream().CopyToAsync(memoryStream);
        SelectedImageBytes = memoryStream.ToArray();
        SelectedImagePreview = $"data:{file.ContentType};base64,{Convert.ToBase64String(SelectedImageBytes)}";
       await ClearRecordedAudio();
    }

    private Task ClearSelectedImage()
    {
        SelectedImageFile = null;
        SelectedImageBytes = null;
        SelectedImagePreview = null;
        return Task.CompletedTask;
    }

    private static string GetImageDataUrl(string? fileType, byte[]? content)
        => (string.IsNullOrWhiteSpace(fileType) || content == null || content.Length == 0)
            ? string.Empty
            : $"data:{fileType};base64,{Convert.ToBase64String(content)}";

    private static string GetDownloadFileName(string? fileName, string? fileType)
    {
        if (!string.IsNullOrWhiteSpace(fileName)) return fileName;
        var ext = "";
        if (!string.IsNullOrWhiteSpace(fileType) && fileType.StartsWith("image/"))
        {
            ext = "." + fileType.Split('/').Last();
        }
        return $"image_{DateTimeOffset.Now.ToUnixTimeSeconds()}{ext}";
    }
}
<style>
    .chat-bubble {
        padding: 0.5rem 0.75rem;
        border-radius: 1rem;
        max-width: 75%;
        word-wrap: break-word;
        white-space: pre-wrap;
    }

    .chat-mine {
        background: linear-gradient(to right, #005eff, #267fff);
        color: white;
        border-top-left-radius: 0;
    }

    .chat-other {
        background-color: #f1f1f1;
        color: #333;
        border-top-right-radius: 0;
    }

    .chat-ai {
        background-color: #f1f1f1;
        color: #353;
        border-top-right-radius: 0;
    }

    .input-group-text-chat {
        display: flex;
        align-items: center;
        padding: .375rem .75rem;
        font-size: 1rem;
        font-weight: 400;
        line-height: 1.5;
        color: var(--bs-body-color);
        text-align: center;
        white-space: nowrap;
        border-radius: var(--bs-border-radius);
    }

    .login-container {
        border: 1px solid #e9ecef;
        background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    }

        .login-container h4 {
            font-weight: 600;
            color: #495057;
        }

        .login-container p {
            font-size: 0.875rem;
            line-height: 1.4;
        }

    /* Improve spacing in the main container */
    .container-fluid {
        padding: 1rem;
    }

    /* Better spacing for chat area */
    #B1 {
        margin-bottom: 1rem;
    }

    /* Improved input group styling */
    .input-group {
        margin-bottom: 1rem;
        border-radius: 0.5rem;
        overflow: hidden;
    }

    /* Better message input styling */
    #B2 {
        border-radius: 0.5rem;
        background-color: #f8f9fa;
    }

    /* Enhanced button styling */
    .finish-conversation-btn {
        border-radius: 20px;
        font-weight: 600;
        font-size: 0.875rem;
        padding: 0.375rem 0.75rem;
        transition: all 0.3s ease;
        border-width: 2px;
        box-shadow: 0 2px 4px rgba(220, 53, 69, 0.2);
    }

        .finish-conversation-btn:hover {
            transform: translateY(-1px);
            box-shadow: 0 4px 8px rgba(220, 53, 69, 0.3);
            border-color: #dc3545;
            background-color: #dc3545;
            color: white;
        }
    /* Enhanced button styling */
    .new-conversation-btn {
        border-radius: 20px;
        font-weight: 600;
        font-size: 0.875rem;
        padding: 0.375rem 0.75rem;
        transition: all 0.3s ease;
        border-width: 2px;
        box-shadow: 0 2px 4px rgba(220, 53, 69, 0.2);
    }

        .new-conversation-btn:hover {
            transform: translateY(-1px);
            box-shadow: 0 4px 8px rgba(220, 53, 69, 0.3);
            border-color: #23caba;
            background-color: #23caba;
            color: white;
        }
    .logout-btn {
        border-radius: 20px;
        font-weight: 600;
        font-size: 0.875rem;
        padding: 0.375rem 0.75rem;
        transition: all 0.3s ease;
        border-width: 2px;
        box-shadow: 0 2px 4px rgba(108, 117, 125, 0.2);
        background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    }

        .logout-btn:hover {
            transform: translateY(-1px);
            box-shadow: 0 4px 8px rgba(108, 117, 125, 0.3);
            border-color: #6c757d;
            background: linear-gradient(135deg, #6c757d 0%, #495057 100%);
            color: white;
        }

    /* Improved header layout */
    .input-group {
        background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
        border: 1px solid #e9ecef;
        border-radius: 15px;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    }

        .input-group p {
            margin: 0;
            font-size: 1.1rem;
            font-weight: 700;
            background: linear-gradient(135deg, #0d6efd 0%, #0b5ed7 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

    /* Enhanced chat area styling */
    .chat-area-container {
        height: 400px;
        overflow-y: auto;
        background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
        border: 2px solid #e9ecef;
        border-radius: 20px;
        padding: 1.5rem;
        margin: 1rem 0;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.8);
        position: relative;
        backdrop-filter: blur(10px);
    }

        .chat-area-container::-webkit-scrollbar {
            width: 8px;
        }

        .chat-area-container::-webkit-scrollbar-track {
            background: #f1f1f1;
            border-radius: 10px;
        }

        .chat-area-container::-webkit-scrollbar-thumb {
            background: linear-gradient(135deg, #0d6efd 0%, #0b5ed7 100%);
            border-radius: 10px;
            transition: all 0.3s ease;
        }

            .chat-area-container::-webkit-scrollbar-thumb:hover {
                background: linear-gradient(135deg, #0b5ed7 0%, #0a4b9e 100%);
            }

    .chat-container {
        background: transparent;
        border-radius: 15px;
        padding: 0;
    }

        .chat-container p {
            color: #6c757d;
            font-size: 0.875rem;
            margin: 0.5rem 0;
            text-align: center;
            font-weight: 500;
        }

    /* Enhanced chat bubble styling */
    .chat-bubble {
        padding: 0.75rem 1rem;
        border-radius: 18px;
        max-width: 75%;
        word-wrap: break-word;
        white-space: pre-wrap;
        font-size: 0.95rem;
        line-height: 1.4;
        position: relative;
        transition: all 0.3s ease;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    }

    .chat-mine {
        background: linear-gradient(135deg, #005eff 0%, #267fff 100%);
        color: white;
        border-top-left-radius: 4px;
        box-shadow: 0 4px 12px rgba(0, 94, 255, 0.3);
    }

        .chat-mine:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(0, 94, 255, 0.4);
        }

    .chat-other {
        background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
        color: #333;
        border-top-right-radius: 4px;
        border: 1px solid #e9ecef;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    }

        .chat-other:hover {
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
        }

    .chat-ai {
        background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
        color: #495057;
        border-top-right-radius: 4px;
        border: 1px solid #dee2e6;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    }

    /* Message status indicators */
    .chat-bubble + i {
        margin-left: 0.5rem;
        opacity: 0.7;
        transition: opacity 0.3s ease;
    }

        .chat-bubble + i:hover {
            opacity: 1;
        }

    /* Empty state styling */
    .chat-area-container .d-flex.justify-content-center {
        background: linear-gradient(135deg, rgba(13, 110, 253, 0.05) 0%, rgba(13, 110, 253, 0.02) 100%);
        border-radius: 15px;
        padding: 2rem;
        margin: 1rem;
    }

        .chat-area-container .d-flex.justify-content-center p {
            background: linear-gradient(135deg, #0d6efd 0%, #0b5ed7 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            font-size: 1.75rem;
            font-weight: 800;
            text-shadow: none;
            margin-top: 1rem;
        }

    /* Enhanced message input styling */
    .message-input-container {
        margin: 0.5rem 0;
        padding: 0.5rem;
        background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
        border: 2px solid #e9ecef;
        border-radius: 25px;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.8);
        transition: all 0.3s ease;
    }

        .message-input-container:hover {
            border-color: #0d6efd;
            box-shadow: 0 6px 12px rgba(13, 110, 253, 0.15), 0 2px 4px rgba(0, 0, 0, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.9);
        }

        .message-input-container:focus-within {
            border-color: #0d6efd;
            box-shadow: 0 8px 16px rgba(13, 110, 253, 0.2), 0 2px 4px rgba(0, 0, 0, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.9);
            transform: translateY(-1px);
        }

    .input-wrapper {
        display: flex;
        align-items: center;
        gap: 0.75rem;
    }

    .message-input {
        flex: 1;
        border: none;
        background: transparent;
        padding: 0.5rem 0.75rem;
        font-size: 0.95rem;
        color: #495057;
        outline: none;
        border-radius: 20px;
        transition: all 0.3s ease;
    }

        .message-input::placeholder {
            color: #adb5bd;
            font-weight: 400;
            transition: color 0.3s ease;
        }

        .message-input:focus::placeholder {
            color: #6c757d;
        }

        .message-input:focus {
            background: rgba(13, 110, 253, 0.05);
        }

    .send-btn {
        border-radius: 50%;
        width: 38px;
        height: 38px;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        background: linear-gradient(135deg, #0d6efd 0%, #0b5ed7 100%);
        border: none;
        box-shadow: 0 4px 12px rgba(13, 110, 253, 0.3);
        transition: all 0.3s ease;
        color: white;
    }

        .send-btn:hover {
            transform: translateY(-2px) scale(1.05);
            box-shadow: 0 6px 16px rgba(13, 110, 253, 0.4);
            background: linear-gradient(135deg, #0b5ed7 0%, #0a4b9e 100%);
        }

        .send-btn:active {
            transform: translateY(0) scale(0.95);
            box-shadow: 0 2px 8px rgba(13, 110, 253, 0.3);
        }

        .send-btn i {
            font-size: 1.1rem;
            transition: transform 0.3s ease;
        }

        .send-btn:hover i {
            transform: scale(1.1);
        }

    .attach-btn {
        border-radius: 50%;
        width: 38px;
        height: 38px;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
        border: 1px solid #e9ecef;
        box-shadow: 0 4px 12px rgba(108, 117, 125, 0.2);
        transition: all 0.3s ease;
        color: #495057;
    }

        .attach-btn:hover {
            transform: translateY(-2px) scale(1.05);
            box-shadow: 0 6px 16px rgba(108, 117, 125, 0.3);
            background: linear-gradient(135deg, #e9ecef 0%, #dee2e6 100%);
        }

        .attach-btn:active {
            transform: translateY(0) scale(0.95);
            box-shadow: 0 2px 8px rgba(108, 117, 125, 0.2);
        }

    /* Audio recording button styling */
    .audio-btn {
        border-radius: 50%;
        width: 38px;
        height: 38px;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
        border: 1px solid #e9ecef;
        box-shadow: 0 4px 12px rgba(108, 117, 125, 0.2);
        transition: all 0.3s ease;
        color: #495057;
        position: relative;
        overflow: hidden;
    }

    .audio-btn:hover {
        transform: translateY(-2px) scale(1.05);
        box-shadow: 0 6px 16px rgba(108, 117, 125, 0.3);
        background: linear-gradient(135deg, #e9ecef 0%, #dee2e6 100%);
    }

    .audio-btn:active {
        transform: translateY(0) scale(0.95);
        box-shadow: 0 2px 8px rgba(108, 117, 125, 0.2);
    }

    .audio-btn.recording {
        background: linear-gradient(135deg, #dc3545 0%, #c82333 100%);
        border-color: #dc3545;
        color: white;
        animation: recordingPulse 1.5s ease-in-out infinite;
    }

    .audio-btn.recording:hover {
        background: linear-gradient(135deg, #c82333 0%, #bd2130 100%);
        transform: translateY(-2px) scale(1.05);
        box-shadow: 0 6px 16px rgba(220, 53, 69, 0.4);
    }

    .recording-pulse {
        animation: iconPulse 1s ease-in-out infinite;
    }

    @@keyframes recordingPulse {
        0%, 100% {
            box-shadow: 0 4px 12px rgba(220, 53, 69, 0.3);
        }
        50% {
            box-shadow: 0 4px 20px rgba(220, 53, 69, 0.6), 0 0 30px rgba(220, 53, 69, 0.3);
        }
    }

    @@keyframes iconPulse {
        0%, 100% {
            transform: scale(1);
        }
        50% {
            transform: scale(1.1);
        }
    }

    /* Audio preview styling */
    .audio-preview {
        background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
        border: 1px solid #e9ecef;
        border-radius: 12px;
        padding: 0.75rem;
        margin-top: 0.5rem;
    }

    .audio-preview-controls {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
    }

    .audio-preview-controls audio {
        border-radius: 8px;
        background: #f8f9fa;
    }

    .audio-preview-info {
        text-align: center;
        color: #6c757d;
        font-size: 0.875rem;
    }

    /* Recording status styling */
    .recording-status {
        background: linear-gradient(135deg, #fff3cd 0%, #ffeaa7 100%);
        border: 1px solid #ffc107;
        border-radius: 12px;
        padding: 0.75rem;
        margin-top: 0.5rem;
        animation: recordingStatusPulse 2s ease-in-out infinite;
    }

    @@keyframes recordingStatusPulse {
        0%, 100% {
            box-shadow: 0 2px 8px rgba(255, 193, 7, 0.2);
        }
        50% {
            box-shadow: 0 4px 16px rgba(255, 193, 7, 0.4);
        }
    }

    .recording-indicator {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
    }

    .recording-dot {
        width: 12px;
        height: 12px;
        background: #dc3545;
        border-radius: 50%;
        animation: recordingDotPulse 1s ease-in-out infinite;
    }

    @@keyframes recordingDotPulse {
        0%, 100% {
            opacity: 1;
            transform: scale(1);
        }
        50% {
            opacity: 0.7;
            transform: scale(1.2);
        }
    }

    .recording-text {
        color: #856404;
        font-weight: 600;
        font-size: 0.875rem;
    }

    /* Audio message styling in chat */
    .audio-message {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
        align-items: center;
    }

    .audio-message audio {
        border-radius: 8px;
        background: #f8f9fa;
        border: 1px solid #e9ecef;
    }

    .audio-info {
        text-align: center;
        color: #6c757d;
        font-size: 0.75rem;
    }

    /* Responsive design for audio elements */
    @@media (max-width: 768px) {
        .audio-preview-controls audio {
            max-width: 200px;
        }
        
        .audio-message audio {
            max-width: 200px;
        }
    }

    @@media (max-width: 480px) {
        .audio-preview-controls audio {
            max-width: 180px;
        }
        
        .audio-message audio {
            max-width: 180px;
        }
        
        .recording-text {
            font-size: 0.8rem;
        }
    }

    /* Beautiful chat separator styling */
    .chat-separator {
        text-align: center;
        margin: 1.5rem 0;
        position: relative;
    }

    .separator-line {
        display: flex;
        align-items: center;
        justify-content: center;
        position: relative;
        margin: 0 1rem;
    }

        .separator-line::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent 0%, rgba(13, 110, 253, 0.3) 20%, rgba(13, 110, 253, 0.6) 50%, rgba(13, 110, 253, 0.3) 80%, transparent 100%);
            transform: translateY(-50%);
            z-index: 1;
        }

    .separator-text {
        background: linear-gradient(135deg, #0d6efd 0%, #0b5ed7 100%);
        color: white;
        padding: 0.25rem 1rem;
        border-radius: 20px;
        font-size: 0.75rem;
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 0.5px;
        box-shadow: 0 2px 8px rgba(13, 110, 253, 0.3);
        position: relative;
        z-index: 2;
        backdrop-filter: blur(10px);
        border: 1px solid rgba(255, 255, 255, 0.2);
        animation: separatorPulse 2s ease-in-out infinite;
    }

    @@keyframes separatorPulse {
        0%, 100% {
            transform: scale(1);
            box-shadow: 0 2px 8px rgba(13, 110, 253, 0.3);
        }

        50% {
            transform: scale(1.05);
            box-shadow: 0 4px 12px rgba(13, 110, 253, 0.4);
        }
    }

    .separator-text::before {
        content: '';
        position: absolute;
        top: -2px;
        left: -2px;
        right: -2px;
        bottom: -2px;
        background: linear-gradient(135deg, #0d6efd 0%, #0b5ed7 100%);
        border-radius: 20px;
        z-index: -1;
        opacity: 0.3;
        filter: blur(4px);
    }

    /* Hover effect for separator */
    .separator-line:hover .separator-text {
        transform: scale(1.1);
        box-shadow: 0 6px 16px rgba(13, 110, 253, 0.5);
        transition: all 0.3s ease;
    }

    /* Alternative separator style for different themes */
    .separator-line.alternative::before {
        background: linear-gradient(90deg, transparent 0%, rgba(220, 53, 69, 0.3) 20%, rgba(220, 53, 69, 0.6) 50%, rgba(220, 53, 69, 0.3) 80%, transparent 100%);
    }

    .separator-line.alternative .separator-text {
        background: linear-gradient(135deg, #dc3545 0%, #c82333 100%);
        box-shadow: 0 2px 8px rgba(220, 53, 69, 0.3);
    }

        .separator-line.alternative .separator-text::before {
            background: linear-gradient(135deg, #dc3545 0%, #c82333 100%);
        }

    /* New message separator with different color scheme */
    .separator-line.new-message::before {
        background: linear-gradient(90deg, transparent 0%, rgba(255, 193, 7, 0.3) 20%, rgba(255, 193, 7, 0.6) 50%, rgba(255, 193, 7, 0.3) 80%, transparent 100%);
    }

    .separator-line.new-message .separator-text {
        background: linear-gradient(135deg, #ffc107 0%, #e0a800 100%);
        color: #212529;
        box-shadow: 0 2px 8px rgba(255, 193, 7, 0.3);
        border: 1px solid rgba(255, 255, 255, 0.3);
    }

        .separator-line.new-message .separator-text::before {
            background: linear-gradient(135deg, #ffc107 0%, #e0a800 100%);
        }

    @@keyframes newMessagePulse {
        0%, 100% {
            transform: scale(1);
            box-shadow: 0 2px 8px rgba(255, 193, 7, 0.3);
        }

        50% {
            transform: scale(1.05);
            box-shadow: 0 4px 12px rgba(255, 193, 7, 0.4);
        }
    }

    .separator-line.new-message .separator-text {
        animation: newMessagePulse 2s ease-in-out infinite;
    }

    .separator-line.new-message:hover .separator-text {
        transform: scale(1.1);
        box-shadow: 0 6px 16px rgba(255, 193, 7, 0.5);
        background: linear-gradient(135deg, #e0a800 0%, #d39e00 100%);
    }

    /* Group selection cards styling */
    .groups-container {
        width: 100%;
        max-width: 600px;
        margin: 0 auto;
    }

    .groups-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 0.75rem;
        padding: 0.75rem;
    }

    .group-card {
        background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
        border: 2px solid #e9ecef;
        border-radius: 12px;
        padding: 1rem;
        cursor: pointer;
        transition: all 0.3s ease;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.1);
        position: relative;
        overflow: hidden;
    }

        .group-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(13, 110, 253, 0.05) 0%, rgba(13, 110, 253, 0.02) 100%);
            opacity: 0;
            transition: opacity 0.3s ease;
            border-radius: 15px;
        }

        .group-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 16px rgba(13, 110, 253, 0.15), 0 2px 4px rgba(0, 0, 0, 0.1);
            border-color: #0d6efd;
        }

            .group-card:hover::before {
                opacity: 1;
            }

        .group-card.selected {
            background: linear-gradient(135deg, #0d6efd 0%, #0b5ed7 100%);
            border-color: #0d6efd;
            color: white;
            box-shadow: 0 8px 16px rgba(13, 110, 253, 0.3), 0 2px 4px rgba(0, 0, 0, 0.1);
        }

            .group-card.selected::before {
                opacity: 0;
            }

            .group-card.selected:hover {
                background: linear-gradient(135deg, #0b5ed7 0%, #0a4b9e 100%);
                transform: translateY(-2px);
            }

    .group-card-content {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 0.5rem;
        text-align: center;
        position: relative;
        z-index: 1;
    }

    .group-icon {
        font-size: 1.5rem;
        color: #0d6efd;
        transition: all 0.3s ease;
    }

    .group-card:hover .group-icon {
        color: #0b5ed7;
        transform: scale(1.1);
    }

    .group-card.selected .group-icon {
        color: white;
    }

    .group-card.selected:hover .group-icon {
        color: rgba(255, 255, 255, 0.9);
    }

    .group-name {
        font-weight: 600;
        font-size: 0.875rem;
        color: #495057;
        transition: all 0.3s ease;
    }

    .group-card:hover .group-name {
        color: #0d6efd;
    }

    .group-card.selected .group-name {
        color: white;
    }

    .group-card.selected:hover .group-name {
        color: rgba(255, 255, 255, 0.9);
    }

    /* Responsive design for group cards */
    @@media (max-width: 768px) {
        .groups-grid {
            grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
            gap: 0.5rem;
            padding: 0.5rem;
        }

        .group-card {
            padding: 0.75rem;
        }

        .group-icon {
            font-size: 1.25rem;
        }

        .group-name {
            font-size: 0.8rem;
        }
    }

    @@media (max-width: 480px) {
        .groups-grid {
            grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
            gap: 0.5rem;
            padding: 0.5rem;
        }

        .group-card {
            padding: 0.5rem;
        }

        .group-icon {
            font-size: 1rem;
        }

        .group-name {
            font-size: 0.75rem;
        }
    }

</style>
<script>

    // Audio recording variables
    let mediaRecorder = null;
    let audioChunks = [];
    let audioStream = null;

    window.startAudioRecording = async () => {
        try {
            // Request microphone access
            audioStream = await navigator.mediaDevices.getUserMedia({ audio: true });
            
            // Create MediaRecorder
            mediaRecorder = new MediaRecorder(audioStream, {
                mimeType: 'audio/webm;codecs=opus'
            });
            
            audioChunks = [];
            
            // Collect audio data
            mediaRecorder.ondataavailable = (event) => {
                if (event.data.size > 0) {
                    audioChunks.push(event.data);
                }
            };
            
            // Start recording
            mediaRecorder.start();
            
            return true;
        } catch (error) {
            console.error('Error starting audio recording:', error);
            return false;
        }
    };

    window.stopAudioRecording = () => {
        return new Promise((resolve) => {
            if (mediaRecorder && mediaRecorder.state !== 'inactive') {
                mediaRecorder.onstop = async () => {
                    try {
                        // Create audio blob
                        const audioBlob = new Blob(audioChunks, { type: 'audio/webm' });
                        
                        // Convert to base64
                        const reader = new FileReader();
                        reader.onloadend = () => {
                            // Convert webm to wav format (simplified)
                            const base64Data = reader.result;
                            resolve(base64Data);
                        };
                        reader.readAsDataURL(audioBlob);
                        
                        // Stop all tracks
                        if (audioStream) {
                            audioStream.getTracks().forEach(track => track.stop());
                            audioStream = null;
                        }
                    } catch (error) {
                        console.error('Error processing audio:', error);
                        resolve('');
                    }
                };
                
                mediaRecorder.stop();
            } else {
                resolve('');
            }
        });
    };

    window.scrollToBottom = (elementId) => {
        const el = document.getElementById(elementId);
        if (el) {
            el.scrollTo({
                top: el.scrollHeight,
                behavior: 'smooth'
            });
        }
    };

    // Scroll to target element (new message separator)
    window.scrollToTarget = () => {
        const targetElement = document.getElementById('target');
        if (targetElement) {
            const chatContainer = document.getElementById('B1');
            if (chatContainer) {
                // Calculate the position of target element relative to chat container
                const targetRect = targetElement.getBoundingClientRect();
                const containerRect = chatContainer.getBoundingClientRect();
                const relativeTop = targetRect.top - containerRect.top;

                // Scroll to show the target element with some padding
                const scrollPosition = chatContainer.scrollTop + relativeTop - 100; // 100px padding
                chatContainer.scrollTo({
                    top: scrollPosition,
                    behavior: 'smooth'
                });
            }
        } else {
            // If no target element exists, scroll to bottom smoothly
            window.scrollToBottom('B1');
        }
    };

    // Observe visibility of chat bubbles using existing scroll-visibility.js approach
    window.observeVisibility = (dotNetHelper) => {
        const elements = document.querySelectorAll(".chat-bubble[data-id]");
        const observer = new IntersectionObserver(entries => {
            entries.forEach(entry => {
                if (entry.isIntersecting) {
                    const id = entry.target.getAttribute("data-id");
                    dotNetHelper.invokeMethodAsync("MarkAsRead", parseInt(id));
                    observer.unobserve(entry.target); // Don't observe again
                }
            });
        }, {
            threshold: 0.6 // 60% of the message must be visible
        });

        elements.forEach(el => observer.observe(el));
    };

    // Auto scroll to target when new messages arrive
    window.autoScrollToNewMessage = () => {
        setTimeout(() => {
            window.scrollToTarget();
        }, 100); // Small delay to ensure DOM is updated
    };

    // Check if target exists and scroll accordingly
    window.scrollToTargetOrBottom = () => {
        const targetElement = document.getElementById('target');
        if (targetElement && targetElement.style.display !== 'none') {
            window.scrollToTarget();
        } else {
            window.scrollToBottom('B1');
        }
    };

    // Trigger click on hidden input by id
    window.triggerClick = (elementId) => {
        const el = document.getElementById(elementId);
        if (el) {
            el.click();
        }
    };

</script>