using FluentAssertions;
using InboxIntel.Application.Abstractions;
using InboxIntel.Application.Search;
using InboxIntel.Domain.Entities;
using InboxIntel.Infrastructure.Persistence;
using InboxIntel.Infrastructure.Search;
using Microsoft.EntityFrameworkCore;
using Xunit;

namespace InboxIntel.IntegrationTests;

/// <summary>
/// Regression guard for the V-10 pagination clamp: the clamp must live at the
/// user-facing controller boundary, NOT in SearchService — otherwise internal
/// callers (CleanupService resolves targets with pageSize 10000) would be silently
/// capped, breaking bulk cleanup-by-query. This proves the service itself honours a
/// large page.
/// </summary>
public class SearchPaginationTests
{
    private sealed class FakeCurrentUser : ICurrentUser
    {
        public Guid UserId { get; set; }
        public bool IsAuthenticated => UserId != Guid.Empty;
    }

    [Fact]
    public async Task SearchService_does_not_clamp_large_internal_page()
    {
        var user = Guid.NewGuid();
        var opts = new DbContextOptionsBuilder<AppDbContext>()
            .UseInMemoryDatabase(nameof(SearchService_does_not_clamp_large_internal_page)).Options;

        using (var seed = new AppDbContext(opts, new FakeCurrentUser()))
        {
            var sender = new Sender { UserId = user, Address = "sender@example.com", DisplayName = "Sender" };
            seed.Senders.Add(sender);
            for (var i = 0; i < 250; i++)
                seed.Emails.Add(new Email { UserId = user, GmailMessageId = $"m{i}", Subject = $"s{i}", SenderId = sender.Id, Sender = sender });
            await seed.SaveChangesAsync();
        }

        using var ctx = new AppDbContext(opts, new FakeCurrentUser { UserId = user });
        // Mirrors how CleanupService resolves targets: a large page via the parser.
        var request = GmailQueryParser.Parse(null, page: 1, pageSize: 10_000);
        var result = await new SearchService(ctx).SearchAsync(user, request);

        result.Items.Should().HaveCount(250);   // not capped at 200
        result.TotalCount.Should().Be(250);
    }
}