using System.Net;
using System.Net.Http.Json;
using System.Text.Json;
using Azaion.E2E.Helpers;
using FluentAssertions;
using Xunit;

namespace Azaion.E2E.Tests;

[Collection("E2E")]
public sealed class UserManagementTests
{
    private static readonly JsonSerializerOptions JsonOptions = new()
    {
        PropertyNameCaseInsensitive = true
    };

    private sealed record ErrorResponse(int ErrorCode, string Message);
    private sealed record UserDto(Guid Id, string Email, int Role, bool IsEnabled);

    private readonly TestFixture _fixture;

    public UserManagementTests(TestFixture fixture) => _fixture = fixture;

    private static string UserBasePath(string email) => $"/users/{Uri.EscapeDataString(email)}";

    [Fact]
    public async Task Registration_with_valid_data_succeeds()
    {
        var email = $"testuser-{Guid.NewGuid():N}@azaion.com";
        using var client = _fixture.CreateAuthenticatedClient(_fixture.AdminToken);
        try
        {
            // Arrange
            var body = new { email, password = "SecurePass1!", role = 10 };

            // Act
            using var response = await client.PostAsync("/users", body);

            // Assert
            response.StatusCode.Should().BeOneOf(HttpStatusCode.OK, HttpStatusCode.NoContent);
        }
        finally
        {
            using var deleteResponse = await client.DeleteAsync(UserBasePath(email));
        }
    }

    [Fact]
    public async Task List_users_returns_non_empty_array()
    {
        // Arrange
        using var client = _fixture.CreateAuthenticatedClient(_fixture.AdminToken);

        // Act
        using var response = await client.GetAsync("/users");

        // Assert
        response.StatusCode.Should().Be(HttpStatusCode.OK);
        var users = await response.Content.ReadFromJsonAsync<UserDto[]>(JsonOptions);
        users.Should().NotBeNull();
        users!.Length.Should().BeGreaterThanOrEqualTo(1);
    }

    [Fact]
    public async Task List_users_filtered_by_email_contains_only_matches()
    {
        // Arrange
        using var client = _fixture.CreateAuthenticatedClient(_fixture.AdminToken);

        // Act
        using var response = await client.GetAsync("/users?searchEmail=" + Uri.EscapeDataString("admin"));

        // Assert
        response.StatusCode.Should().Be(HttpStatusCode.OK);
        var users = await response.Content.ReadFromJsonAsync<UserDto[]>(JsonOptions);
        users.Should().NotBeNull();
        users!.Should().NotBeEmpty();
        users.Should().OnlyContain(u => u.Email.Contains("admin", StringComparison.OrdinalIgnoreCase));
    }

    [Fact]
    public async Task Set_user_role_succeeds()
    {
        var email = $"testuser-{Guid.NewGuid():N}@azaion.com";
        using var client = _fixture.CreateAuthenticatedClient(_fixture.AdminToken);
        try
        {
            // Arrange
            using (var createResp = await client.PostAsync("/users", new { email, password = "SecurePass1!", role = 10 }))
            {
                createResp.StatusCode.Should().BeOneOf(HttpStatusCode.OK, HttpStatusCode.NoContent);
            }

            // Act
            using var response = await client.PutAsync($"{UserBasePath(email)}/set-role/50");

            // Assert
            response.StatusCode.Should().BeOneOf(HttpStatusCode.OK, HttpStatusCode.NoContent);
        }
        finally
        {
            using var deleteResponse = await client.DeleteAsync(UserBasePath(email));
        }
    }

    [Fact]
    public async Task Disable_user_succeeds()
    {
        var email = $"testuser-{Guid.NewGuid():N}@azaion.com";
        using var client = _fixture.CreateAuthenticatedClient(_fixture.AdminToken);
        try
        {
            // Arrange
            using (var createResp = await client.PostAsync("/users", new { email, password = "SecurePass1!", role = 10 }))
            {
                createResp.StatusCode.Should().BeOneOf(HttpStatusCode.OK, HttpStatusCode.NoContent);
            }

            // Act
            using var response = await client.PutAsync($"{UserBasePath(email)}/disable");

            // Assert
            response.StatusCode.Should().BeOneOf(HttpStatusCode.OK, HttpStatusCode.NoContent);
        }
        finally
        {
            using var deleteResponse = await client.DeleteAsync(UserBasePath(email));
        }
    }

    [Fact]
    public async Task Delete_user_succeeds_and_user_not_in_search_results()
    {
        var email = $"testuser-{Guid.NewGuid():N}@azaion.com";
        using var client = _fixture.CreateAuthenticatedClient(_fixture.AdminToken);
        try
        {
            // Arrange
            using (var createResp = await client.PostAsync("/users", new { email, password = "SecurePass1!", role = 10 }))
            {
                createResp.StatusCode.Should().BeOneOf(HttpStatusCode.OK, HttpStatusCode.NoContent);
            }

            // Act
            using var deleteResponse = await client.DeleteAsync(UserBasePath(email));

            // Assert
            deleteResponse.StatusCode.Should().BeOneOf(HttpStatusCode.OK, HttpStatusCode.NoContent);

            using var verifyResponse = await client.GetAsync("/users?searchEmail=" + Uri.EscapeDataString(email));
            verifyResponse.StatusCode.Should().Be(HttpStatusCode.OK);
            var users = await verifyResponse.Content.ReadFromJsonAsync<UserDto[]>(JsonOptions);
            users.Should().NotBeNull();
            users!.Should().NotContain(u => u.Email.Equals(email, StringComparison.OrdinalIgnoreCase));
        }
        finally
        {
            using var deleteResponse = await client.DeleteAsync(UserBasePath(email));
        }
    }

    [Fact]
    public async Task Registration_rejects_empty_email_with_400()
    {
        // Arrange
        using var client = _fixture.CreateAuthenticatedClient(_fixture.AdminToken);

        // Act
        using var response = await client.PostAsync("/users",
            new { email = "", password = "ValidPass123", role = 10 });

        // Assert
        response.StatusCode.Should().Be(HttpStatusCode.BadRequest);
    }

    [Fact]
    public async Task Registration_rejects_invalid_email_format_with_400()
    {
        // Arrange
        using var client = _fixture.CreateAuthenticatedClient(_fixture.AdminToken);

        // Act
        using var response = await client.PostAsync("/users",
            new { email = "notavalidemail", password = "ValidPass123", role = 10 });

        // Assert
        response.StatusCode.Should().Be(HttpStatusCode.BadRequest);
    }

    [Fact]
    public async Task Registration_rejects_short_password_with_400()
    {
        // Arrange
        using var client = _fixture.CreateAuthenticatedClient(_fixture.AdminToken);

        // Act
        using var response = await client.PostAsync("/users",
            new { email = "validmail@test.com", password = "short", role = 10 });

        // Assert
        response.StatusCode.Should().Be(HttpStatusCode.BadRequest);
    }

    [Fact]
    public async Task Registration_rejects_duplicate_admin_email_with_409()
    {
        // Arrange
        using var client = _fixture.CreateAuthenticatedClient(_fixture.AdminToken);

        // Act
        using var response = await client.PostAsync("/users",
            new { email = _fixture.AdminEmail, password = "DuplicateP1!", role = 10 });

        // Assert
        response.StatusCode.Should().Be(HttpStatusCode.Conflict);
        var err = await response.Content.ReadFromJsonAsync<ErrorResponse>(JsonOptions);
        err.Should().NotBeNull();
        err!.ErrorCode.Should().Be(20);
    }
}