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;
using System.Collections.Generic;
using System.Linq;
using Xunit;

namespace ManagerService.Tests.Controllers
{
    public class UserControllerTests
    {
        private UserController BuildController(MyInfoMateDbContext db, string callerRole = "Manager.superadmin", string callerInstanceId = "inst-test")
        {
            var cfg = FakeMongoConfig.Create();
            var userService = new UserDatabaseService(cfg);
            var profileLogic = new ProfileLogic(NullLogger<ProfileLogic>.Instance);

            var controller = new UserController(
                NullLogger<UserController>.Instance,
                userService,
                profileLogic,
                db);

            FakeUser.SetUser(controller, FakeUser.Create(callerRole, callerInstanceId));
            return controller;
        }

        private static UserDetailDTO MakeNewUser(string email, string instanceId = "inst-test", UserRole role = UserRole.ContentEditor) =>
            new UserDetailDTO
            {
                email = email,
                firstName = "Test",
                lastName = "User",
                instanceId = instanceId,
                password = "password123",
                role = role
            };

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

        [Fact]
        public void Get_SuperAdmin_SeesAllInstances()
        {
            using var db = DbContextFactory.Create();
            db.Users.AddRange(
                new User { Id = "u1", Email = "a@a.be", Password = "x", LastName = "A", Token = "t1", InstanceId = "inst1" },
                new User { Id = "u2", Email = "b@b.be", Password = "x", LastName = "B", Token = "t2", InstanceId = "inst2" }
            );
            db.SaveChanges();

            var result = BuildController(db, "Manager.superadmin").Get();

            var ok = Assert.IsType<OkObjectResult>(result);
            var users = Assert.IsAssignableFrom<IEnumerable<UserDetailDTO>>(ok.Value);
            Assert.Equal(2, users.Count());
        }

        [Fact]
        public void Get_InstanceAdmin_SeesOnlyOwnInstance()
        {
            using var db = DbContextFactory.Create();
            db.Users.AddRange(
                new User { Id = "u1", Email = "a@a.be", Password = "x", LastName = "A", Token = "t1", InstanceId = "inst-test" },
                new User { Id = "u2", Email = "b@b.be", Password = "x", LastName = "B", Token = "t2", InstanceId = "other-inst" }
            );
            db.SaveChanges();

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

            var ok = Assert.IsType<OkObjectResult>(result);
            var users = Assert.IsAssignableFrom<IEnumerable<UserDetailDTO>>(ok.Value);
            Assert.Equal(1, users.Count());
            Assert.All(users, u => Assert.Equal("inst-test", u.instanceId));
        }

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

        [Fact]
        public void CreateUser_DuplicateEmail_Returns409()
        {
            using var db = DbContextFactory.Create();
            db.Users.Add(new User { Id = "u1", Email = "dup@a.be", Password = "x", LastName = "A", Token = "t1", InstanceId = "inst-test" });
            db.SaveChanges();

            var result = BuildController(db).CreateUser(MakeNewUser("dup@a.be"));

            Assert.IsType<ConflictObjectResult>(result);
        }

        [Fact]
        public void CreateUser_InstanceAdminCreatingInstanceAdmin_Returns403()
        {
            // InstanceAdmin (role=1) ne peut pas créer SuperAdmin (role=0)
            using var db = DbContextFactory.Create();

            var result = BuildController(db, "Manager.instanceadmin")
                .CreateUser(MakeNewUser("new@a.be", role: UserRole.SuperAdmin));

            var statusResult = Assert.IsType<ObjectResult>(result);
            Assert.Equal(403, statusResult.StatusCode);
        }

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

            var result = BuildController(db).CreateUser(MakeNewUser("new@a.be"));

            Assert.IsType<OkObjectResult>(result);
            var user = db.Users.First();
            Assert.NotEqual("password123", user.Password); // doit être haché
        }

        [Fact]
        public void CreateUser_NullPassword_Returns400()
        {
            using var db = DbContextFactory.Create();

            var dto = new UserDetailDTO { email = "x@x.be", lastName = "X", instanceId = "inst-test", password = null };
            var result = BuildController(db).CreateUser(dto);

            Assert.IsType<BadRequestObjectResult>(result);
        }

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

        [Fact]
        public void UpdateUser_UnknownId_Returns404()
        {
            using var db = DbContextFactory.Create();

            var result = BuildController(db).UpdateUser(new UserDetailDTO { id = "unknown", firstName = "X", lastName = "Y" });

            Assert.IsType<NotFoundObjectResult>(result);
        }

        [Fact]
        public void UpdateUser_ExistingUser_UpdatesName()
        {
            using var db = DbContextFactory.Create();
            db.Users.Add(new User { Id = "u1", Email = "a@a.be", Password = "x", LastName = "Old", Token = "t1", InstanceId = "inst-test" });
            db.SaveChanges();

            var result = BuildController(db).UpdateUser(new UserDetailDTO { id = "u1", firstName = "New", lastName = "Name" });

            Assert.IsType<OkObjectResult>(result);
            var user = db.Users.First();
            Assert.Equal("New", user.FirstName);
            Assert.Equal("Name", user.LastName);
        }

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

        [Fact]
        public void DeleteUser_ExistingUser_Returns202()
        {
            using var db = DbContextFactory.Create();
            db.Users.Add(new User { Id = "u1", Email = "a@a.be", Password = "x", LastName = "A", Token = "t1", InstanceId = "inst-test" });
            db.SaveChanges();

            var result = BuildController(db).DeleteUser("u1");

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

        [Fact]
        public void DeleteUser_UnknownId_Returns404()
        {
            using var db = DbContextFactory.Create();

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

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