@page "/chat/{room?}"
@using Microsoft.AspNetCore.SignalR.Client;
@using LiveChat.Models;
@inject NavigationManager Navigation

<PageTitle>Chat room</PageTitle>


@if(Room is null or "")
{
    <p class="alert alert-info"><i class="bi bi-exclamation-circle-fill"></i> Fant ikke rom i URL. Lag et rom og putt det i URLen.</p>
}

<h1>Rom @Room</h1>

<p>Din tilkoblings ID: @connectionId. Brukernavn: @username</p>

@foreach (var msg in msgs)
{
    <div class="message">@msg</div>
}

<div class="messageFormContainer">
    @if (messageModel == null)
    {
        <p>laster inn meldingsboks</p>
    }
    else
    {
        <EditForm Model="@messageModel" OnValidSubmit="@HandleSubmit" class="MessageForm">
            <DataAnnotationsValidator />
            <div class="MessageFormValidation">
                <ValidationSummary />
            </div>

            <div class="MessageFormInputs">
                <input @bind-value="messageModel.Message" placeholder="Skriv inn din melding..." class="MessageFormMessage" />
                <button type="submit" class="MessageFormButton"><i class="bi bi-send-fill"></i></button>
            </div>
        </EditForm>
    }
</div>

@code {
    [Parameter]
    public string? Room { get; set; }

    private HubConnection? hubConnection;

    private List<string> msgs = new List<string>();

    private bool ErViInne = false;

    private string connectionId = "";

    private string username = "";

    private MessageModel messageModel = new MessageModel() { User = "Something", Message = "" };


    protected override async Task OnInitializedAsync()
    {
        hubConnection = new HubConnectionBuilder()
            .WithUrl(Navigation.ToAbsoluteUri("/chathub"))
            .Build();

        await hubConnection.StartAsync();

        // lag tilfeldig navn
        username = "Bruker" + new Random().Next(1, 1000);

        if (Room != null || Room != "")
        {
            // sjekk om rom finnes
            // hvis ikke, lag et rom
            using (var db = new ChattingContext())
            {
                var room = db.Rooms.FirstOrDefault(r => r.RoomJoinCode == Room);
                if (room is null)
                {
                    Console.WriteLine("Lager rom?!?");
                    room = new Room() { RoomJoinCode = Room };
                    db.Rooms.Add(room);
                    db.SaveChanges();
                }
            }
        }


        // bli med i rom
        await hubConnection.SendAsync("JoinRoom", Room, username);
        ErViInne = true;
        messageModel.User = username;

        hubConnection.On<string, string>("ReceiveMessage", (user, message) =>
        {
            var encodedMsg = $"{user}: {message}";
            msgs.Add(encodedMsg);
            InvokeAsync(StateHasChanged);
        });
    }    

    private async Task HandleSubmit()
    {
        messageModel.User = username;
        await hubConnection.SendAsync("SendMessageRoom", messageModel.User, messageModel.Message, Room);
    }

    public bool IsConnected =>
        hubConnection?.State == HubConnectionState.Connected;

    public async ValueTask DisposeAsync()
    {
        if (hubConnection is not null)
        {
            await hubConnection.DisposeAsync();
        }
    }
}