@inject ISessionCredentialStore CredStore
@inject IUserSessionService Session
@inject ISessionManager SessionManager
@inject NavigationManager Nav
@using SharepointToolbox.Web.Core.Models
@using SharepointToolbox.Web.Services.Session

@if (_visible)
{
    <div class="modal-overlay">
        <div class="modal-dialog">
            <div class="modal-header">
                <h3>Connect to Microsoft</h3>
                <p class="text-muted">
                    Authenticate to access <strong>@Session.CurrentProfile?.Name</strong>.
                    Your session token is stored in your browser only — never saved to disk.
                </p>
            </div>

            @if (!string.IsNullOrEmpty(_error))
            {
                <div class="alert alert-error">@_error</div>
            }

            <div class="flex-row mt-8">
                <button class="btn btn-primary" @onclick="ConnectAsync" disabled="@_connecting">
                    @(_connecting ? "Redirecting…" : "Connect via Microsoft")
                </button>
                <button class="btn btn-secondary" @onclick="Cancel" disabled="@_connecting">Cancel</button>
            </div>

            <p class="text-muted" style="font-size:11px;margin-top:8px">
                You will be redirected to Microsoft login. MFA is supported.
            </p>
        </div>
    </div>
}

@code {
    [Parameter] public EventCallback OnConnected { get; set; }

    private bool   _visible;
    private bool   _connecting;
    private string _error = string.Empty;

    public async Task ShowAsync()
    {
        _error      = string.Empty;
        _connecting = false;
        _visible    = true;
        await InvokeAsync(StateHasChanged);
    }

    private async Task ConnectAsync()
    {
        var profile = Session.CurrentProfile;
        if (profile is null) { _error = "No client profile selected."; return; }

        _connecting = true;
        _error      = string.Empty;

        // Clear any stale CSOM contexts
        await SessionManager.ClearAllAsync();

        var currentUrl = Nav.Uri;
        var connectUrl = $"/connect/initiate?profileId={Uri.EscapeDataString(profile.Id)}" +
                         $"&returnUrl={Uri.EscapeDataString(currentUrl)}";

        // Force full HTTP navigation to break out of the Blazor SignalR circuit
        Nav.NavigateTo(connectUrl, forceLoad: true);
    }

    private void Cancel()
    {
        _visible    = false;
        _connecting = false;
    }
}