using Manager.Services;
using ManagerService.Controllers;
using ManagerService.Data;
using ManagerService.DTOs;
using ManagerService.Services;
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 ResourceControllerTests
    {
        private static ResourceController BuildController(MyInfoMateDbContext db)
        {
            var cfg = FakeMongoConfig.Create();
            var controller = new ResourceController(
                NullLogger<ResourceController>.Instance,
                new ResourceDatabaseService(cfg),
                new SectionDatabaseService(cfg),
                new ConfigurationDatabaseService(cfg),
                db);
            FakeUser.SetUser(controller, FakeUser.Create("Manager.contenteditor", "inst-test"));
            return controller;
        }

        // ── GET ──────────────────────────────────────────────────────────────

        [Fact]
        public void Get_FiltersToInstance()
        {
            using var db = DbContextFactory.Create();
            db.Resources.AddRange(
                new Resource { Id = "r1", InstanceId = "inst-test", Label = "A", Type = ResourceType.Image },
                new Resource { Id = "r2", InstanceId = "other-inst", Label = "B", Type = ResourceType.Image }
            );
            db.SaveChanges();

            var result = BuildController(db).Get("inst-test", new List<ResourceType>());

            var ok = Assert.IsType<OkObjectResult>(result);
            var resources = (ok.Value as System.Collections.IEnumerable)!.Cast<object>().ToList();
            Assert.Single(resources);
        }

        [Fact]
        public void Get_WithTypeFilter_FiltersType()
        {
            using var db = DbContextFactory.Create();
            db.Resources.AddRange(
                new Resource { Id = "r1", InstanceId = "inst-test", Label = "A", Type = ResourceType.Image },
                new Resource { Id = "r2", InstanceId = "inst-test", Label = "B", Type = ResourceType.Video }
            );
            db.SaveChanges();

            var result = BuildController(db).Get("inst-test", new List<ResourceType> { ResourceType.Image });

            var ok = Assert.IsType<OkObjectResult>(result);
            var resources = (ok.Value as System.Collections.IEnumerable)!.Cast<object>().ToList();
            Assert.Single(resources);
        }

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

        [Fact]
        public void Update_ExistingResource_UpdatesLabel()
        {
            using var db = DbContextFactory.Create();
            db.Resources.Add(new Resource { Id = "r1", InstanceId = "inst-test", Label = "Old", Type = ResourceType.Image });
            db.SaveChanges();

            var result = BuildController(db).Update(new ResourceDTO { id = "r1", label = "New Label" });

            Assert.IsType<OkObjectResult>(result);
            Assert.Equal("New Label", db.Resources.First().Label);
        }

        [Fact]
        public void Update_UnknownResource_Returns404()
        {
            using var db = DbContextFactory.Create();

            var result = BuildController(db).Update(new ResourceDTO { id = "unknown", label = "X" });

            Assert.IsType<NotFoundObjectResult>(result);
        }

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

        [Fact]
        public void Delete_NullifiesConfigurationImageId()
        {
            using var db = DbContextFactory.Create();
            db.Resources.Add(new Resource { Id = "r1", InstanceId = "inst-test", Label = "Img", Type = ResourceType.Image });
            db.Configurations.Add(new Configuration { Id = "c1", InstanceId = "inst-test", Label = "C", ImageId = "r1", Title = new List<TranslationDTO>() });
            db.SaveChanges();

            BuildController(db).Delete("r1");

            Assert.Null(db.Configurations.First().ImageId);
        }

        [Fact]
        public void Delete_NullifiesSectionImageId()
        {
            using var db = DbContextFactory.Create();
            db.Resources.Add(new Resource { Id = "r1", InstanceId = "inst-test", Label = "Img", Type = ResourceType.Image });
            db.Configurations.Add(new Configuration { Id = "c1", InstanceId = "inst-test", Label = "C", Title = new List<TranslationDTO>() });
            db.Sections.Add(new Section { Id = "s1", InstanceId = "inst-test", Label = "S", ImageId = "r1", Type = SectionType.Article, ConfigurationId = "c1", Title = new List<TranslationDTO>(), Description = new List<TranslationDTO>() });
            db.SaveChanges();

            BuildController(db).Delete("r1");

            Assert.Null(db.Sections.First().ImageId);
        }

        [Fact]
        public void Delete_UnknownResource_Returns404()
        {
            using var db = DbContextFactory.Create();

            var result = BuildController(db).Delete("unknown");

            Assert.IsType<NotFoundObjectResult>(result);
        }

        [Fact]
        public void Delete_ExistingResource_Returns202()
        {
            using var db = DbContextFactory.Create();
            db.Resources.Add(new Resource { Id = "r1", InstanceId = "inst-test", Label = "A", Type = ResourceType.Image });
            db.SaveChanges();

            var result = BuildController(db).Delete("r1");

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