using Data.SeaHavenIndustries;
using FluentAssertions;
using Microsoft.AspNetCore.Identity;
using Microsoft.Extensions.Options;
using Moq;
using SeaHaven.DataServices.Interfaces;
using SeaHaven.Services.Configuration;
using SeaHaven.Services.DTOs;
using SeaHaven.Services.Implementation;
using SeaHaven.Services.Interfaces;
using System.Security.Claims;
using Xunit;

namespace Api.SeaHavenIndustries.Tests;

public class AuthenticationServiceTests
{
    private static AuthenticationService NewService(
        Mock<IUserDataService> userData,
        Mock<IForgetPasswordDataService> forget,
        Mock<IEmailSender> email,
        out Mock<IUserRoleStore<ApplicationUser>> store,
        out Mock<IPasswordHasher<ApplicationUser>> hasher)
    {
        var (manager, s, h) = IdentityTestHelpers.CreateUserManager();
        store = s;
        hasher = h;
        var jwtOptions = Microsoft.Extensions.Options.Options.Create(JwtOptions);
        var sessionStamps = new SessionStampService(userData.Object, new InMemorySessionStampCache(TimeProvider.System), jwtOptions);
        return new AuthenticationService(manager, jwtOptions, userData.Object, forget.Object, email.Object, sessionStamps);
    }

    private static JwtOptions JwtOptions => new()
    {
        Secret = new string('x', 64),
        ValidIssuer = "issuer",
        ValidAudience = "audience"
    };

    [Fact]
    public async Task Login_UnknownUser_ReturnsNull()
    {
        var service = NewService(new Mock<IUserDataService>(), new Mock<IForgetPasswordDataService>(), new Mock<IEmailSender>(), out var store, out _);
        store.Setup(s => s.FindByNameAsync(It.IsAny<string>(), It.IsAny<CancellationToken>())).ReturnsAsync((ApplicationUser?)null);

        var result = await service.LoginAsync("nobody", "pw", CancellationToken.None);

        result.Should().BeNull();
    }

    [Fact]
    public async Task Login_DeletedUser_RejectedBeforePasswordCheck()
    {
        var deletedUser = IdentityTestHelpers.User(isDeleted: true);
        var service = NewService(new Mock<IUserDataService>(), new Mock<IForgetPasswordDataService>(), new Mock<IEmailSender>(), out var store, out var hasher);
        store.Setup(s => s.FindByNameAsync(It.IsAny<string>(), It.IsAny<CancellationToken>())).ReturnsAsync(deletedUser);
        store.Setup(s => s.GetRolesAsync(deletedUser, It.IsAny<CancellationToken>())).ReturnsAsync(new List<string>());

        var result = await service.LoginAsync("alice", "pw", CancellationToken.None);

        result.Should().BeNull();
        hasher.Verify(h => h.VerifyHashedPassword(It.IsAny<ApplicationUser>(), It.IsAny<string>(), It.IsAny<string>()), Times.Never);
    }

    [Fact]
    public async Task Login_ValidUser_ReturnsTokenFirstRoleAndIdentity()
    {
        var user = IdentityTestHelpers.User();
        var service = NewService(new Mock<IUserDataService>(), new Mock<IForgetPasswordDataService>(), new Mock<IEmailSender>(), out var store, out var hasher);
        store.Setup(s => s.FindByNameAsync(It.IsAny<string>(), It.IsAny<CancellationToken>())).ReturnsAsync(user);
        store.Setup(s => s.GetRolesAsync(user, It.IsAny<CancellationToken>())).ReturnsAsync(new List<string> { "Admin", "Manager" });
        store.As<Microsoft.AspNetCore.Identity.IUserPasswordStore<ApplicationUser>>()
            .Setup(s => s.GetPasswordHashAsync(user, It.IsAny<CancellationToken>())).ReturnsAsync("hash");
        hasher.Setup(h => h.VerifyHashedPassword(user, "hash", "pw")).Returns(Microsoft.AspNetCore.Identity.PasswordVerificationResult.Success);

        var result = await service.LoginAsync("alice", "pw", CancellationToken.None);

        result.Should().NotBeNull();
        result!.Id.Should().Be(user.Id);
        result.Email.Should().Be(user.Email);
        result.PhoneNumber.Should().Be(user.PhoneNumber);
        result.Fullname.Should().Be("Alice Q");
        result.UserRole.Should().Be("Admin");
        result.Token.Should().NotBeNullOrEmpty();
        result.Expiration.Should().BeAfter(DateTime.Now.AddDays(9));
    }

    [Fact]
    public async Task Login_BadPassword_ReturnsNull()
    {
        var user = IdentityTestHelpers.User();
        var service = NewService(new Mock<IUserDataService>(), new Mock<IForgetPasswordDataService>(), new Mock<IEmailSender>(), out var store, out var hasher);
        store.Setup(s => s.FindByNameAsync(It.IsAny<string>(), It.IsAny<CancellationToken>())).ReturnsAsync(user);
        store.As<Microsoft.AspNetCore.Identity.IUserPasswordStore<ApplicationUser>>()
            .Setup(s => s.GetPasswordHashAsync(user, It.IsAny<CancellationToken>())).ReturnsAsync("hash");
        hasher.Setup(h => h.VerifyHashedPassword(user, "hash", "wrong")).Returns(Microsoft.AspNetCore.Identity.PasswordVerificationResult.Failed);

        var result = await service.LoginAsync("alice", "wrong", CancellationToken.None);

        result.Should().BeNull();
    }

    [Fact]
    public async Task ForgetPassword_RegisteredEmail_ReplacesCodeAndSendsEmail()
    {
        var user = IdentityTestHelpers.User();
        var userData = new Mock<IUserDataService>();
        userData.Setup(u => u.GetByEmailNormalizedAsync("alice@example.com", It.IsAny<CancellationToken>())).ReturnsAsync(user);
        var forget = new Mock<IForgetPasswordDataService>();
        var email = new Mock<IEmailSender>();

        var service = NewService(userData, forget, email, out _, out _);

        var found = await service.ForgetPasswordAsync("alice@example.com", CancellationToken.None);

        found.Should().BeTrue();
        forget.Verify(
            f => f.ReplaceCodeAsync(
                user.Email!,
                user.Id,
                It.Is<string>(code => code.Length == 6 && code.All(char.IsDigit)),
                It.IsAny<CancellationToken>()),
            Times.Once);
        email.Verify(e => e.SendEmailAsync(user.Email!, "Forget Password Request.", It.Is<string>(b => b.Contains("Your Password Reset Code is:"))), Times.Once);
    }

    [Fact]
    public async Task ForgetPassword_UnknownEmail_DoesNotEmailOrStoreCode()
    {
        var userData = new Mock<IUserDataService>();
        userData.Setup(u => u.GetByEmailNormalizedAsync(It.IsAny<string>(), It.IsAny<CancellationToken>())).ReturnsAsync((ApplicationUser?)null);
        var forget = new Mock<IForgetPasswordDataService>();
        var email = new Mock<IEmailSender>();

        var service = NewService(userData, forget, email, out _, out _);

        var found = await service.ForgetPasswordAsync("nope@example.com", CancellationToken.None);

        found.Should().BeFalse();
        forget.Verify(f => f.ReplaceCodeAsync(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<CancellationToken>()), Times.Never);
        email.Verify(e => e.SendEmailAsync(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Never);
    }

    [Theory]
    [InlineData(true)]
    [InlineData(false)]
    public async Task VerifyCode_ForwardsDataServiceResult(bool exists)
    {
        var forget = new Mock<IForgetPasswordDataService>();
        forget.Setup(f => f.CodeExistsAsync("abc", It.IsAny<CancellationToken>())).ReturnsAsync(exists);

        var service = NewService(new Mock<IUserDataService>(), forget, new Mock<IEmailSender>(), out _, out _);

        var result = await service.VerifyCodeAsync("abc", CancellationToken.None);

        result.Should().Be(exists);
    }

    [Fact]
    public async Task ResetPassword_NoMatchingCode_ReturnsFalseWithoutReset()
    {
        var forget = new Mock<IForgetPasswordDataService>();
        forget.Setup(f => f.ExistsByEmailAndCodeAsync(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<CancellationToken>())).ReturnsAsync(false);

        var service = NewService(new Mock<IUserDataService>(), forget, new Mock<IEmailSender>(), out var store, out _);

        var result = await service.ResetPasswordAsync("a@b.com", "999", "new", CancellationToken.None);

        result.Should().BeFalse();
        store.Verify(s => s.FindByIdAsync(It.IsAny<string>(), It.IsAny<CancellationToken>()), Times.Never);
        forget.Verify(f => f.RemoveByEmailAsync(It.IsAny<string>(), It.IsAny<CancellationToken>()), Times.Never);
    }
}