using System.Security.Claims;
using Bunit;
using Microsoft.AspNetCore.Components.Authorization;
using Microsoft.Extensions.DependencyInjection;
using NSubstitute;
using ScadaLink.CentralUI.Components.Shared;
using ScadaLink.Commons.Entities.Notifications;
using ScadaLink.Commons.Interfaces.Repositories;
using NotificationListsPage = ScadaLink.CentralUI.Components.Pages.Notifications.NotificationLists;

namespace ScadaLink.CentralUI.Tests.Pages;

/// <summary>
/// bUnit rendering tests for the standalone Notification Lists page (Task 7).
/// </summary>
public class NotificationListsPageTests : BunitContext
{
    private void WireAuthAndDialog()
    {
        Services.AddSingleton<IDialogService>(new AlwaysConfirmDialogService());

        var claims = new[]
        {
            new Claim("Username", "tester"),
            new Claim(ClaimTypes.Role, "Design"),
        };
        var user = new ClaimsPrincipal(new ClaimsIdentity(claims, "TestAuth"));
        Services.AddSingleton<AuthenticationStateProvider>(new TestAuthStateProvider(user));
        Services.AddAuthorizationCore();
    }

    [Fact]
    public void RendersNotificationListRows()
    {
        var repo = Substitute.For<INotificationRepository>();
        repo.GetAllNotificationListsAsync()
            .Returns(Task.FromResult<IReadOnlyList<NotificationList>>(
                new List<NotificationList> { new("Ops On-Call") { Id = 1 } }));
        repo.GetRecipientsByListIdAsync(1)
            .Returns(Task.FromResult<IReadOnlyList<NotificationRecipient>>(
                new List<NotificationRecipient> { new("Jane", "jane@example.com") }));
        Services.AddSingleton(repo);
        WireAuthAndDialog();

        var cut = Render<NotificationListsPage>();

        cut.WaitForAssertion(() =>
        {
            Assert.Contains("Ops On-Call", cut.Markup);
            Assert.Contains("jane@example.com", cut.Markup);
        });
    }

    [Fact]
    public void ShowsEmptyState_WhenNoLists()
    {
        var repo = Substitute.For<INotificationRepository>();
        repo.GetAllNotificationListsAsync()
            .Returns(Task.FromResult<IReadOnlyList<NotificationList>>(
                new List<NotificationList>()));
        Services.AddSingleton(repo);
        WireAuthAndDialog();

        var cut = Render<NotificationListsPage>();

        cut.WaitForAssertion(() =>
            Assert.Contains("No notification lists", cut.Markup));
    }

    [Fact]
    public void DeleteList_ConfirmsThenDeletesAndReloads()
    {
        var repo = Substitute.For<INotificationRepository>();
        repo.GetAllNotificationListsAsync()
            .Returns(Task.FromResult<IReadOnlyList<NotificationList>>(
                new List<NotificationList> { new("Ops On-Call") { Id = 1 } }));
        repo.GetRecipientsByListIdAsync(1)
            .Returns(Task.FromResult<IReadOnlyList<NotificationRecipient>>(
                new List<NotificationRecipient>()));
        Services.AddSingleton(repo);
        WireAuthAndDialog();

        var cut = Render<NotificationListsPage>();

        cut.WaitForState(() => cut.Markup.Contains("Ops On-Call"));

        var deleteButton = cut.FindAll("tbody tr button")
            .First(b => b.TextContent.Contains("Delete"));
        deleteButton.Click();

        cut.WaitForAssertion(() =>
        {
            repo.Received().DeleteNotificationListAsync(1);
            repo.Received().SaveChangesAsync();
            // Reload re-invokes the list query (once on init, once after delete).
            repo.Received(2).GetAllNotificationListsAsync();
        });
    }

    /// <summary>A dialog service that auto-confirms, so action paths run end-to-end.</summary>
    private sealed class AlwaysConfirmDialogService : IDialogService
    {
        public Task<bool> ConfirmAsync(string title, string message, bool danger = false)
            => Task.FromResult(true);

        public Task<string?> PromptAsync(
            string title, string label, string initialValue = "", string? placeholder = null)
            => Task.FromResult<string?>(null);
    }
}