using System.Security.Claims;
using ZB.MOM.WW.ScadaBridge.Security;
using Bunit;
using Microsoft.AspNetCore.Components.Authorization;
using Microsoft.Extensions.DependencyInjection;
using NSubstitute;
using ZB.MOM.WW.ScadaBridge.CentralUI.Components.Shared;
using ZB.MOM.WW.ScadaBridge.Commons.Entities.Notifications;
using ZB.MOM.WW.ScadaBridge.Commons.Interfaces.Repositories;
using ZB.MOM.WW.ScadaBridge.Commons.Types.Enums;
using NotificationListsPage = ZB.MOM.WW.ScadaBridge.CentralUI.Components.Pages.Notifications.NotificationLists;

namespace ZB.MOM.WW.ScadaBridge.CentralUI.Tests.Pages;

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

        var claims = new[]
        {
            new Claim(JwtTokenService.UsernameClaimType, "tester"),
            new Claim(JwtTokenService.RoleClaimType, "Designer"),
        };
        var user = new ClaimsPrincipal(new ClaimsIdentity(claims, "TestAuth"));
        Services.AddSingleton<AuthenticationStateProvider>(new TestAuthStateProvider(user));
        Services.AddAuthorizationCore();
        Services.AddTestConfigurationMutations();
    }

    /// <summary>Verifies that the page renders a row for each notification list.</summary>
    [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);
        });
    }

    /// <summary>Verifies that the page shows an empty state when there are no lists.</summary>
    [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));
    }

    /// <summary>Verifies that deleting a list confirms, deletes it and reloads the list.</summary>
    [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>Verifies that the type column renders SMS for an SMS list.</summary>
    [Fact]
    public void RendersTypeColumn_Sms()
    {
        var repo = Substitute.For<INotificationRepository>();
        repo.GetAllNotificationListsAsync()
            .Returns(Task.FromResult<IReadOnlyList<NotificationList>>(
                new List<NotificationList>
                {
                    new("SMS Alerts") { Id = 2, Type = NotificationType.Sms }
                }));
        repo.GetRecipientsByListIdAsync(2)
            .Returns(Task.FromResult<IReadOnlyList<NotificationRecipient>>(
                new List<NotificationRecipient>()));
        Services.AddSingleton(repo);
        WireAuthAndDialog();

        var cut = Render<NotificationListsPage>();

        cut.WaitForAssertion(() =>
        {
            Assert.Contains("SMS Alerts", cut.Markup);
            Assert.Contains("Sms", cut.Markup);
        });
    }

    /// <summary>Verifies that an SMS list recipient badge shows the phone number instead of empty angle brackets.</summary>
    [Fact]
    public void SmsListRecipientBadge_ShowsPhoneNumber_NotEmptyAngleBrackets()
    {
        // CentralUI-NNN regression: an SMS recipient carries a PhoneNumber and a null
        // EmailAddress. The badge must render the phone, not the email-shaped "Name <>".
        var repo = Substitute.For<INotificationRepository>();
        repo.GetAllNotificationListsAsync()
            .Returns(Task.FromResult<IReadOnlyList<NotificationList>>(
                new List<NotificationList>
                {
                    new("SMS Alerts") { Id = 7, Type = NotificationType.Sms }
                }));
        repo.GetRecipientsByListIdAsync(7)
            .Returns(Task.FromResult<IReadOnlyList<NotificationRecipient>>(
                new List<NotificationRecipient> { NotificationRecipient.ForSms("Jane", "+15551234567") }));
        Services.AddSingleton(repo);
        WireAuthAndDialog();

        var cut = Render<NotificationListsPage>();

        cut.WaitForAssertion(() =>
        {
            Assert.Contains("+15551234567", cut.Markup);
            // The bug rendered an empty contact field ("Jane <>") for SMS recipients.
            Assert.DoesNotContain("Jane &lt;&gt;", cut.Markup);
            Assert.DoesNotContain("Jane <>", cut.Markup);
        });
    }

    /// <summary>Verifies that the type column renders Email for an email list.</summary>
    [Fact]
    public void RendersTypeColumn_Email()
    {
        // The list name deliberately contains no channel word so that the only "Email"
        // in the rendered markup originates from the Type column cell, not the name cell.
        // This guards against false-passes where the name itself satisfies the assertion.
        var repo = Substitute.For<INotificationRepository>();
        repo.GetAllNotificationListsAsync()
            .Returns(Task.FromResult<IReadOnlyList<NotificationList>>(
                new List<NotificationList>
                {
                    new("Ops Alerts") { Id = 3, Type = NotificationType.Email }
                }));
        repo.GetRecipientsByListIdAsync(3)
            .Returns(Task.FromResult<IReadOnlyList<NotificationRecipient>>(
                new List<NotificationRecipient>()));
        Services.AddSingleton(repo);
        WireAuthAndDialog();

        var cut = Render<NotificationListsPage>();

        cut.WaitForAssertion(() =>
        {
            // Verify the row name rendered.
            Assert.Contains("Ops Alerts", cut.Markup);

            // Locate the Type <td> in the rendered table row and assert its text content
            // is exactly "Email".  If the Type column were removed the <td> would not
            // exist and the assertion would throw, catching the regression.
            var typeCell = cut.FindAll("tbody tr td")
                .FirstOrDefault(td => td.TextContent.Trim() == "Email");
            Assert.NotNull(typeCell);
        });
    }

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

        // Register row 75 added a DialogSeverity overload. This stub auto-confirms
        // regardless of severity — it exists to let action paths run end to end, not to
        // assert anything about styling.
        /// <inheritdoc />
        public Task<bool> ConfirmAsync(string title, string message, DialogSeverity severity, string? confirmLabel = null)
            => Task.FromResult(true);

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

        /// <summary>Returns a completed task with the default result without showing a dialog.</summary>
        /// <typeparam name="TResult">The dialog result type.</typeparam>
        /// <param name="title">The dialog title.</param>
        /// <param name="body">The dialog body fragment.</param>
        /// <param name="size">The optional dialog size.</param>
        /// <returns>A task that resolves to the default result.</returns>
        public Task<TResult?> ShowAsync<TResult>(
            string title,
            Microsoft.AspNetCore.Components.RenderFragment<DialogContext<TResult>> body,
            string? size = null)
            => Task.FromResult<TResult?>(default);
    }
}