@using Syncfusion.Blazor.InteractiveChat

<div style="height: 500px; width: 600px;">
    <SfChatUI ID="chatUser" User="CurrentUser" Messages="Messages"></SfChatUI>
</div>

@code {
    private UserModel CurrentUser = new UserModel 
    { 
        ID = "user1", 
        User = "Albert",
        AvatarBgColor = "#4a90e2"
    };

    private UserModel OtherUser = new UserModel 
    { 
        ID = "user2", 
        User = "Michale Suyama",
        AvatarBgColor = "#7cb342"
    };

    private List<ChatMessage> Messages = new()
    {
        new ChatMessage 
        { 
            Text = "Hi, how are you?", 
            Author = new UserModel { ID = "user1", User = "Albert" }
        },
        new ChatMessage 
        { 
            Text = "I'm doing great! How about you?", 
            Author = new UserModel { ID = "user2", User = "Michale Suyama" }
        }
    };
}

<SfChatUI ID="chat" User="CurrentUser" Messages="Messages">
</SfChatUI>

@code {
    private UserModel CurrentUser = new UserModel 
    { 
        ID = "user1", 
        User = "Albert",
        StatusIconCss = "e-icons e-user-online"
    };

    private List<ChatMessage> Messages = new();
}

<SfChatUI 
    ID="chat" 
    User="CurrentUser" 
    Messages="Messages"
    TypingUsers="TypingUsers">
</SfChatUI>

@code {
    private List<UserModel> TypingUsers = new();
    
    private void UserStartTyping(UserModel user)
    {
        TypingUsers.Add(user);
        StateHasChanged();
    }
}

<SfChatUI ID="chat" User="CurrentUser" Messages="Messages">
    <MessageTemplate>
        <div class="custom-message">
            <strong>@context.Message.Author.User</strong>
            <p>@((MarkupString)context.Message.Text)</p>
        </div>
    </MessageTemplate>
</SfChatUI>

<SfChatUI ID="chat" User="CurrentUser" Messages="Messages">
    <ChatUIAttachment 
        Enable 
        SaveUrl="@SaveUrl" 
        RemoveUrl="@RemoveUrl"
        AllowedFileTypes=".pdf,.docx,.jpg,.png">
    </ChatUIAttachment>
</SfChatUI>

@code {
    private string SaveUrl = "api/upload/save";
    private string RemoveUrl = "api/upload/remove";
}

<SfChatUI 
    @ref="chatRef"
    ID="chat" 
    User="CurrentUser" 
    Messages="Messages"
    AutoScrollToBottom="true">
</SfChatUI>

<button @onclick="ScrollToBottom">Go to Latest</button>
<button @onclick="FocusInput">Focus Input</button>

@code {
    private SfChatUI chatRef;
    
    private async Task ScrollToBottom()
    {
        await chatRef.ScrollToBottomAsync();
    }
    
    private async Task FocusInput()
    {
        await chatRef.FocusAsync();
    }
}

<SfChatUI @ref="chatRef" ID="chat" User="CurrentUser" Messages="Messages">
</SfChatUI>

@code {
    private SfChatUI chatRef;
    
    private async Task EditMessage(string messageId, string newText)
    {
        var message = Messages.FirstOrDefault(m => m.ID == messageId);
        if (message != null)
        {
            message.Text = newText;
            await chatRef.UpdateMessageAsync(message, messageId);
        }
    }
}

<SfChatUI 
    ID="chat" 
    User="CurrentUser" 
    Messages="Messages"
    MentionChar="@"
    MentionUsers="AllUsers"
    ValueSelecting="@OnMentionSelected">
</SfChatUI>

@code {
    private List<UserModel> AllUsers = new()
    {
        new UserModel { ID = "user1", User = "Albert" },
        new UserModel { ID = "user2", User = "Michale" },
        new UserModel { ID = "user3", User = "Reena" }
    };
    
    private void OnMentionSelected(MentionValueSelectingEventArgs<UserModel> args)
    {
        Console.WriteLine($"User mentioned: {args.ItemData.User}");
    }
}

<SfChatUI 
    ID="chat" 
    User="CurrentUser" 
    Messages="Messages"
    EnableCompactMode="true">
</SfChatUI>

@code {
    // In compact mode, all messages appear on left side
    // Useful for group chat or support ticket interfaces
}

@ref="chatRef"

private SfChatUI chatRef;

private async Task ShowLatestMessages()
{
    await chatRef.ScrollToBottomAsync();
}

private async Task NavigateToMessage(string targetMessageId)
{
    await chatRef.ScrollToMessageAsync(targetMessageId);
}

private async Task EditMessage(string messageId, string newText)
{
    var message = Messages.FirstOrDefault(m => m.ID == messageId);
    if (message != null)
    {
        message.Text = newText;
        await chatRef.UpdateMessageAsync(message, messageId);
    }
}

private async Task FocusChatInput()
{
    await chatRef.FocusAsync();
}