using Manager.Services;
using ManagerService.Controllers;
using ManagerService.Data;
using ManagerService.DTOs;
using ManagerService.Helpers;
using ManagerService.Tests.Infrastructure;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging.Abstractions;
using System.Collections.Generic;
using System.Linq;
using Xunit;

namespace ManagerService.Tests.Controllers
{
    public class ApplicationInstanceControllerTests
    {
        private static ApplicationInstanceController BuildController(MyInfoMateDbContext db)
        {
            var cfg = FakeMongoConfig.Create();
            var controller = new ApplicationInstanceController(
                NullLogger<ApplicationInstanceController>.Instance,
                new InstanceDatabaseService(cfg),
                new UserDatabaseService(cfg),
                new ProfileLogic(NullLogger<ProfileLogic>.Instance),
                db);
            FakeUser.SetUser(controller, FakeUser.Create("Manager.instanceadmin", "inst-test"));
            return controller;
        }

        // ── CREATE ───────────────────────────────────────────────────────────

        [Fact]
        public void Create_ValidDto_Persists()
        {
            using var db = DbContextFactory.Create();

            var result = BuildController(db).Create(new ApplicationInstanceDTO
            {
                instanceId = "inst-test",
                appType = AppType.Tablet
            });

            Assert.IsType<OkObjectResult>(result);
            Assert.Equal(1, db.ApplicationInstances.Count());
        }

        // ── UPDATE ───────────────────────────────────────────────────────────

        [Fact]
        public void Update_ExistingAppInstance_UpdatesAppType()
        {
            using var db = DbContextFactory.Create();
            db.ApplicationInstances.Add(new ApplicationInstance { Id = "ai-1", InstanceId = "inst-test", AppType = AppType.Tablet });
            db.SaveChanges();

            var result = BuildController(db).Update(new ApplicationInstanceDTO
            {
                id = "ai-1",
                instanceId = "inst-test",
                appType = AppType.Web
            });

            Assert.IsType<OkObjectResult>(result);
            Assert.Equal(AppType.Web, db.ApplicationInstances.First().AppType);
        }

        [Fact]
        public void Update_UnknownId_Returns404()
        {
            using var db = DbContextFactory.Create();

            var result = BuildController(db).Update(new ApplicationInstanceDTO { id = "unknown" });

            Assert.IsType<NotFoundObjectResult>(result);
        }

        // ── DELETE ───────────────────────────────────────────────────────────

        [Fact]
        public void Delete_ExistingAppInstance_Returns202()
        {
            using var db = DbContextFactory.Create();
            db.ApplicationInstances.Add(new ApplicationInstance { Id = "ai-1", InstanceId = "inst-test", AppType = AppType.Tablet });
            db.SaveChanges();

            var result = BuildController(db).Delete("ai-1");

            var obj = Assert.IsType<ObjectResult>(result);
            Assert.Equal(202, obj.StatusCode);
            Assert.Equal(0, db.ApplicationInstances.Count());
        }

        // ── CONFIG LINK ──────────────────────────────────────────────────────

        [Fact]
        public void AddConfigLink_DuplicatePrevented_Returns409()
        {
            using var db = DbContextFactory.Create();
            db.ApplicationInstances.Add(new ApplicationInstance { Id = "ai-1", InstanceId = "inst-test", AppType = AppType.Tablet, Configurations = new List<AppConfigurationLink>() });
            db.Configurations.Add(new Configuration { Id = "c1", InstanceId = "inst-test", Label = "C", Title = new List<TranslationDTO>() });
            db.AppConfigurationLinks.Add(new AppConfigurationLink { Id = "lnk-1", ApplicationInstanceId = "ai-1", ConfigurationId = "c1" });
            db.SaveChanges();

            var result = BuildController(db).AddConfigurationToApplicationInstance("ai-1", new AppConfigurationLinkDTO
            {
                applicationInstanceId = "ai-1",
                configurationId = "c1"
            });

            Assert.IsType<ConflictObjectResult>(result);
        }

        [Fact]
        public void UpdateApplicationLinkOrder_ReordersCorrectly()
        {
            using var db = DbContextFactory.Create();
            db.Configurations.AddRange(
                new Configuration { Id = "c1", InstanceId = "inst-test", Label = "C1", Title = new List<TranslationDTO>() },
                new Configuration { Id = "c2", InstanceId = "inst-test", Label = "C2", Title = new List<TranslationDTO>() }
            );
            db.ApplicationInstances.Add(new ApplicationInstance { Id = "ai-1", InstanceId = "inst-test", AppType = AppType.Tablet });
            db.AppConfigurationLinks.AddRange(
                new AppConfigurationLink { Id = "lnk-1", ApplicationInstanceId = "ai-1", ConfigurationId = "c1", Order = 0 },
                new AppConfigurationLink { Id = "lnk-2", ApplicationInstanceId = "ai-1", ConfigurationId = "c2", Order = 1 }
            );
            db.SaveChanges();

            var result = BuildController(db).UpdateApplicationLinkOrder(new List<AppConfigurationLinkDTO>
            {
                new AppConfigurationLinkDTO { id = "lnk-1", order = 1, configurationId = "c1" },
                new AppConfigurationLinkDTO { id = "lnk-2", order = 0, configurationId = "c2" }
            });

            Assert.IsType<OkObjectResult>(result);
            Assert.Equal(1, db.AppConfigurationLinks.First(l => l.Id == "lnk-1").Order);
            Assert.Equal(0, db.AppConfigurationLinks.First(l => l.Id == "lnk-2").Order);
        }
    }
}