using System.Security.Claims;
using Data.SeaHavenIndustries;
using Data.SeaHavenIndustries.Enums;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
using Microsoft.Data.Sqlite;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Metadata;
using Microsoft.Extensions.Logging.Abstractions;
using SeaHaven.DataServices.Dto;
using SeaHaven.DataServices.Implementation;
using SeaHaven.DataServices.Interfaces;
using SeaHaven.Services.DTOs;
using SeaHaven.Services.Implementation;

namespace SeaHavenIndustries.Tests;

public sealed class TeamMemberCreateTransactionTests
{
    [Fact]
    public async Task Create_MidSequencePersistenceFailure_RollsBackAllMemberRows()
    {
        await using var connection = new SqliteConnection("Data Source=:memory:;Foreign Keys=True");
        await connection.OpenAsync();

        var options = new DbContextOptionsBuilder<ApplicationDbContext>()
            .UseSqlite(connection)
            .Options;

        await using (var setup = new SqliteTeamMemberTestDbContext(options))
            await setup.Database.EnsureCreatedAsync();

        await using (var createScope = new SqliteTeamMemberTestDbContext(options))
        {
            var permissionData = new ThrowingAfterPersistPermissionDataService(
                new TeamPermissionOverrideDataService(createScope));
            var service = new TeamMemberService(
                CreateUserManager(createScope),
                CreateRoleManager(createScope),
                new UserServiceAreaDataService(createScope),
                permissionData,
                new UserDataService(createScope),
                permissionService: null!);

            var failure = await Record.ExceptionAsync(() => service.CreateAsync(
                ValidRequest(),
                Admin(),
                CancellationToken.None));

            Assert.IsType<InvalidOperationException>(failure);
            Assert.Equal("injected mid-sequence failure", failure!.Message);
        }

        await using var verify = new SqliteTeamMemberTestDbContext(options);
        Assert.Empty(await verify.Users.AsNoTracking().ToListAsync());
        Assert.Empty(await verify.Roles.AsNoTracking().ToListAsync());
        Assert.Empty(await verify.UserRoles.AsNoTracking().ToListAsync());
        Assert.Empty(await verify.UserServiceAreas.AsNoTracking().ToListAsync());
        Assert.Empty(await verify.UserPermissionOverrides.AsNoTracking().ToListAsync());
    }

    private static UserManager<ApplicationUser> CreateUserManager(ApplicationDbContext context) =>
        new(
            new UserStore<ApplicationUser>(context),
            Microsoft.Extensions.Options.Options.Create(new IdentityOptions()),
            new PasswordHasher<ApplicationUser>(),
            Array.Empty<IUserValidator<ApplicationUser>>(),
            Array.Empty<IPasswordValidator<ApplicationUser>>(),
            new UpperInvariantLookupNormalizer(),
            new IdentityErrorDescriber(),
            new EmptyServiceProvider(),
            NullLogger<UserManager<ApplicationUser>>.Instance);

    private static RoleManager<IdentityRole> CreateRoleManager(ApplicationDbContext context) =>
        new(
            new RoleStore<IdentityRole>(context),
            Array.Empty<IRoleValidator<IdentityRole>>(),
            new UpperInvariantLookupNormalizer(),
            new IdentityErrorDescriber(),
            NullLogger<RoleManager<IdentityRole>>.Instance);

    private static CreateTeamMemberRequestDTO ValidRequest() => new()
    {
        Name = "Taylor Dispatcher",
        Role = "dispatcher",
        Color = "#F59E0B",
        Email = "taylor@example.com",
        Phone = "555-0100",
        ServiceAreas = new[] { "east", "West" },
        PermissionOverrides = new Dictionary<string, UserPermissionState>
        {
            ["deleteSites"] = UserPermissionState.Allow
        }
    };

    private static ClaimsPrincipal Admin() =>
        new(new ClaimsIdentity(new[] { new Claim(ClaimTypes.Role, "Admin") }, "test"));

    private sealed class SqliteTeamMemberTestDbContext : ApplicationDbContext
    {
        public SqliteTeamMemberTestDbContext(DbContextOptions<ApplicationDbContext> options)
            : base(options)
        {
        }

        protected override void OnModelCreating(ModelBuilder builder)
        {
            base.OnModelCreating(builder);

            foreach (var index in builder.Model.GetEntityTypes().SelectMany(entity => entity.GetIndexes()))
            {
                if (index.GetFilter() is not null)
                    index.SetFilter(null);
            }

            foreach (var property in builder.Model.GetEntityTypes()
                         .SelectMany(entity => entity.GetProperties())
                         .Where(property => property.Name == "RowVersion" && property.ClrType == typeof(byte[])))
            {
                property.ValueGenerated = ValueGenerated.Never;
                property.IsConcurrencyToken = false;
            }
        }
    }

    private sealed class ThrowingAfterPersistPermissionDataService : ITeamPermissionOverrideDataService
    {
        private readonly ITeamPermissionOverrideDataService _inner;

        public ThrowingAfterPersistPermissionDataService(ITeamPermissionOverrideDataService inner)
        {
            _inner = inner;
        }

        public Task<TeamPermissionUserData?> GetUserAsync(string userId, CancellationToken cancellationToken) =>
            _inner.GetUserAsync(userId, cancellationToken);

        public Task SetOverrideAsync(
            string userId,
            string permissionKey,
            UserPermissionState state,
            CancellationToken cancellationToken) =>
            _inner.SetOverrideAsync(userId, permissionKey, state, cancellationToken);

        public async Task SetOverridesAsync(
            string userId,
            IReadOnlyDictionary<string, UserPermissionState> overrides,
            CancellationToken cancellationToken)
        {
            await _inner.SetOverridesAsync(userId, overrides, cancellationToken);
            throw new InvalidOperationException("injected mid-sequence failure");
        }

        public Task ClearOverridesAsync(string userId, CancellationToken cancellationToken) =>
            _inner.ClearOverridesAsync(userId, cancellationToken);
    }

    private sealed class EmptyServiceProvider : IServiceProvider
    {
        public object? GetService(Type serviceType) => null;
    }
}