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@page "/InvalidSession"
@using LibMatrix

<PageTitle>Invalid session</PageTitle>

<h3>Rory&::MatrixUtils - Invalid session encountered</h3>
<p>A session was encountered that is no longer valid. This can happen if you have logged out of the account on another device, or if the access token has expired.</p>

@if (_login is not null) {
    <p>It appears that the affected user is @_login.UserId (@_login.DeviceId) on @_login.Homeserver!</p>
    <LinkButton OnClick="@(OpenRefreshDialog)">Refresh token</LinkButton>
    <LinkButton OnClick="@(RemoveUser)">Remove</LinkButton>

    @if (_showRefreshDialog) {
        <ModalWindow MinWidth="300" X="275" Y="300" Title="@($"Password for {_login.UserId}")">
            <FancyTextBox IsPassword="true" @bind-Value="@_password"></FancyTextBox><br/>
            <LinkButton OnClick="TryLogin">Log in</LinkButton>
            @if (_loginException is not null) {
                <pre style="color: red;">@_loginException.RawContent</pre>
            }
        </ModalWindow>
    }
}
else {
    <b>Something has gone wrong and the login was not passed along!</b>
}

@code
{
    [Parameter]
    [SupplyParameterFromQuery(Name = "ctx")]
    public string Context { get; set; }

    private UserAuth? _login { get; set; }

    private bool _showRefreshDialog { get; set; }

    private string _password { get; set; } = "";

    private MatrixException? _loginException { get; set; }

    protected override async Task OnInitializedAsync() {
        var tokens = await MRUStorage.GetAllTokens();
        if (tokens is null || tokens.Count == 0) {
            NavigationManager.NavigateTo("/Login");
            return;
        }

        _login = tokens.FirstOrDefault(x => x.AccessToken == Context);

        if (_login is null) {
            Console.WriteLine($"Could not find {_login} in stored tokens!");
        }

        await base.OnInitializedAsync();
    }

    private async Task RemoveUser() {
        await MRUStorage.RemoveToken(_login!);
        if ((await MRUStorage.GetCurrentToken())!.AccessToken == _login!.AccessToken)
            await MRUStorage.SetCurrentToken((await MRUStorage.GetAllTokens())?.FirstOrDefault());
        await OnInitializedAsync();
    }

    private async Task OpenRefreshDialog() {
        _showRefreshDialog = true;
        StateHasChanged();
        await Task.CompletedTask;
    }

    private async Task SwitchSession(UserAuth auth) {
        Console.WriteLine($"Switching to {auth.Homeserver} {auth.AccessToken} {auth.UserId}");
        await MRUStorage.SetCurrentToken(auth);
        await OnInitializedAsync();
    }

    private async Task TryLogin() {
        if(_login is null) throw new NullReferenceException("Login is null!");
        try {
            var result = new UserAuth(await hsProvider.Login(_login.Homeserver, _login.UserId, _password));
            if (result is null) {
                Console.WriteLine($"Failed to login to {_login.Homeserver} as {_login.UserId}!");
                return;
            }
            Console.WriteLine($"Obtained access token for {result.UserId}!");

            await RemoveUser();
            await MRUStorage.AddToken(result);
            if (result.UserId == (await MRUStorage.GetCurrentToken())?.UserId)
                await MRUStorage.SetCurrentToken(result);
            NavigationManager.NavigateTo("/");
        }
        catch (MatrixException e) {
            Console.WriteLine($"Failed to login to {_login.Homeserver} as {_login.UserId}!");
            Console.WriteLine(e);
            _loginException = e;
            StateHasChanged();
        }
    }
}