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.Configuration;
using Microsoft.Extensions.Logging.Abstractions;
using System.Collections.Generic;
using System.Linq;
using Xunit;

namespace ManagerService.Tests.Controllers
{
    public class SectionControllerTests
    {
        private static IConfiguration BuildConfig() =>
            new ConfigurationBuilder()
                .AddInMemoryCollection(new Dictionary<string, string?>
                {
                    ["ConnectionStrings:TabletDb"] = "mongodb://localhost:27017",
                    ["SupportedLanguages:0"] = "FR",
                    ["SupportedLanguages:1"] = "EN"
                })
                .Build();

        private static SectionController BuildController(MyInfoMateDbContext db)
        {
            var cfg = FakeMongoConfig.Create();
            var controller = new SectionController(
                BuildConfig(),
                NullLogger<SectionController>.Instance,
                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.Sections.AddRange(
                new Section { Id = "s1", InstanceId = "inst-test", Label = "A", Type = SectionType.Article, ConfigurationId = "c1", Title = new List<TranslationDTO>(), Description = new List<TranslationDTO>() },
                new Section { Id = "s2", InstanceId = "other-inst", Label = "B", Type = SectionType.Article, ConfigurationId = "c2", Title = new List<TranslationDTO>(), Description = new List<TranslationDTO>() }
            );
            db.SaveChanges();

            var result = BuildController(db).Get("inst-test");

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

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

        [Fact]
        public void Create_ValidDto_Persists()
        {
            using var db = DbContextFactory.Create();
            db.Configurations.Add(new Configuration { Id = "c1", InstanceId = "inst-test", Label = "Conf", Title = new List<TranslationDTO>() });
            db.SaveChanges();

            var result = BuildController(db).Create(new SectionDTO
            {
                instanceId = "inst-test",
                configurationId = "c1",
                label = "Section 1",
                type = SectionType.Video
            });

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

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

            // KeyNotFoundException → caught by catch(Exception) → 500
            var result = BuildController(db).Create(new SectionDTO
            {
                instanceId = "inst-test",
                configurationId = "nonexistent",
                label = "Section 1",
                type = SectionType.Video
            });

            var obj = Assert.IsType<ObjectResult>(result);
            Assert.Equal(500, obj.StatusCode);
        }

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

        [Fact]
        public void Delete_ExistingSection_Returns202()
        {
            using var db = DbContextFactory.Create();
            db.Sections.Add(new Section { Id = "s1", InstanceId = "inst-test", Label = "A", Type = SectionType.Article, ConfigurationId = "c1", Title = new List<TranslationDTO>(), Description = new List<TranslationDTO>() });
            db.SaveChanges();

            var result = BuildController(db).Delete("s1");

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

        [Fact]
        public void Delete_UnknownSection_Returns404()
        {
            using var db = DbContextFactory.Create();

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

            Assert.IsType<NotFoundObjectResult>(result);
        }
    }
}