using ManagerService.Data;
using ManagerService.Services;
using ManagerService.Tests.Infrastructure;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging.Abstractions;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Xunit;

namespace ManagerService.Tests.Services
{
    /// <summary>
    /// La purge s'appuie sur <c>ExecuteDeleteAsync</c>, que le provider InMemory ne sait pas
    /// traduire — un test là-bas ne dirait rien de ce qui se passe en production. Ceux-ci
    /// s'exécutent contre un vrai PostgreSQL, et se sautent proprement sans démon Docker.
    /// </summary>
    [Collection(PostgresCollection.Name)]
    public class AuditLogPurgePostgresTests
    {
        private readonly PostgresFixture _postgres;

        public AuditLogPurgePostgresTests(PostgresFixture postgres)
        {
            _postgres = postgres;
        }

        private static AuditLogPurgeService BuildService(MyInfoMateDbContext db, int retentionDays)
        {
            var configuration = new ConfigurationBuilder()
                .AddInMemoryCollection(new Dictionary<string, string>
                {
                    ["Audit:RetentionDays"] = retentionDays.ToString()
                })
                .Build();

            return new AuditLogPurgeService(db, configuration,
                NullLogger<AuditLogPurgeService>.Instance);
        }

        private static AuditLog Entry(string id, DateTime timestamp) => new AuditLog
        {
            Id = id,
            EntityType = "User",
            EntityId = "u1",
            Action = "Update",
            UserId = "u1",
            Timestamp = timestamp
        };

        [SkippableFact]
        public async Task PurgeAsync_DeletesOnlyBeyondTheWindow()
        {
            Skip.IfNot(_postgres.Available, _postgres.SkipReason);

            using var db = _postgres.CreateMigratedContext("audit_purge");
            db.AuditLogs.AddRange(
                Entry("vieux", DateTime.UtcNow.AddDays(-400)),
                Entry("recent", DateTime.UtcNow.AddDays(-30)));
            db.SaveChanges();

            await BuildService(db, AuditLogPurgeService.DefaultRetentionDays).PurgeAsync();

            Assert.Equal("recent", Assert.Single(db.AuditLogs).Id);
        }
    }
}