using ManagerService.Controllers;
using ManagerService.Data;
using ManagerService.DTOs;
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 ConfigurationControllerTests
    {
        private static IConfiguration BuildConfig() =>
            new ConfigurationBuilder()
                .AddInMemoryCollection(new Dictionary<string, string?>
                {
                    ["ConnectionStrings:TabletDb"] = "mongodb://localhost:27017",
                    ["OpenWeatherApiKey"] = ""
                })
                .Build();

        private static ConfigurationController BuildController(MyInfoMateDbContext db) =>
            new ConfigurationController(BuildConfig(), NullLogger<ConfigurationController>.Instance, db);

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

        [Fact]
        public void Get_FiltersToInstance()
        {
            using var db = DbContextFactory.Create();
            db.Configurations.AddRange(
                new Configuration { Id = "c1", InstanceId = "inst-a", Label = "A", Title = new List<TranslationDTO>() },
                new Configuration { Id = "c2", InstanceId = "inst-b", Label = "B", Title = new List<TranslationDTO>() }
            );
            db.SaveChanges();

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

            var ok = Assert.IsType<OkObjectResult>(result);
            var list = Assert.IsAssignableFrom<System.Collections.IEnumerable>(ok.Value);
            Assert.Single(list.Cast<object>());
        }

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

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

            var result = BuildController(db).Create(new ConfigurationDTO
            {
                instanceId = "inst-a",
                label = "My Config",
                languages = new List<string> { "FR" }
            });

            Assert.IsType<OkObjectResult>(result);
            Assert.Equal(1, db.Configurations.Count());
            Assert.Equal("My Config", db.Configurations.First().Label);
        }

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

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

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

            Assert.IsType<NotFoundObjectResult>(result);
        }

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

        [Fact]
        public void Delete_ExistingConfig_Returns202()
        {
            using var db = DbContextFactory.Create();
            db.Configurations.Add(new Configuration { Id = "c1", InstanceId = "inst-a", Label = "A", Title = new List<TranslationDTO>() });
            db.SaveChanges();

            var result = BuildController(db).Delete("c1");

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

        [Fact]
        public void Delete_UnknownId_Returns404()
        {
            using var db = DbContextFactory.Create();

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

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