using FluentValidation.TestHelper;
using SIGCM2.Application.Auth;
using SIGCM2.Application.Usuarios.Create;

namespace SIGCM2.Application.Tests.Usuarios.Create;

public class CreateUsuarioCommandValidatorTests
{
    private static CreateUsuarioCommandValidator BuildValidator(AuthOptions? opts = null) =>
        new(opts ?? new AuthOptions());

    private static CreateUsuarioCommand ValidCommand() => new(
        Username: "operador1",
        Password: "Secreto123",
        Nombre: "Juan",
        Apellido: "Pérez",
        Email: null,
        Rol: "cajero");

    // ── Happy paths ──────────────────────────────────────────────────────────

    [Fact]
    public void Validate_ValidCommand_NoErrors()
    {
        var result = BuildValidator().TestValidate(ValidCommand());
        result.ShouldNotHaveAnyValidationErrors();
    }

    [Fact]
    public void Validate_NullEmail_IsValid()
    {
        var cmd = ValidCommand() with { Email = null };
        BuildValidator().TestValidate(cmd).ShouldNotHaveAnyValidationErrors();
    }

    [Fact]
    public void Validate_ValidEmailPresent_NoErrors()
    {
        var cmd = ValidCommand() with { Email = "juan@example.com" };
        BuildValidator().TestValidate(cmd).ShouldNotHaveAnyValidationErrors();
    }

    // ── Username ─────────────────────────────────────────────────────────────

    [Fact]
    public void Validate_EmptyUsername_HasError()
    {
        var cmd = ValidCommand() with { Username = "" };
        BuildValidator().TestValidate(cmd).ShouldHaveValidationErrorFor(c => c.Username);
    }

    [Fact]
    public void Validate_UsernameTooShort_HasError()
    {
        var cmd = ValidCommand() with { Username = "ab" };
        BuildValidator().TestValidate(cmd).ShouldHaveValidationErrorFor(c => c.Username);
    }

    [Fact]
    public void Validate_UsernameTooLong_HasError()
    {
        var cmd = ValidCommand() with { Username = new string('a', 51) };
        BuildValidator().TestValidate(cmd).ShouldHaveValidationErrorFor(c => c.Username);
    }

    [Theory]
    [InlineData("abc")]         // 3 chars — boundary valid
    [InlineData("user.name")]   // dot allowed
    [InlineData("user-name")]   // dash allowed
    [InlineData("user_name")]   // underscore allowed
    [InlineData("user123")]     // alphanumeric
    public void Validate_UsernameValidFormats_NoError(string username)
    {
        var cmd = ValidCommand() with { Username = username };
        BuildValidator().TestValidate(cmd).ShouldNotHaveValidationErrorFor(c => c.Username);
    }

    [Theory]
    [InlineData("user name")]   // space not allowed
    [InlineData("user@name")]   // @ not allowed
    [InlineData("user#1")]      // # not allowed
    public void Validate_UsernameInvalidChars_HasError(string username)
    {
        var cmd = ValidCommand() with { Username = username };
        BuildValidator().TestValidate(cmd).ShouldHaveValidationErrorFor(c => c.Username);
    }

    // ── Password ─────────────────────────────────────────────────────────────

    [Fact]
    public void Validate_EmptyPassword_HasError()
    {
        var cmd = ValidCommand() with { Password = "" };
        BuildValidator().TestValidate(cmd).ShouldHaveValidationErrorFor(c => c.Password);
    }

    [Fact]
    public void Validate_PasswordTooShort_HasError()
    {
        var cmd = ValidCommand() with { Password = "Ab1cd5" }; // 6 chars < 8
        BuildValidator().TestValidate(cmd).ShouldHaveValidationErrorFor(c => c.Password);
    }

    [Fact]
    public void Validate_PasswordNoLetter_HasError()
    {
        var cmd = ValidCommand() with { Password = "12345678" }; // digits only
        BuildValidator().TestValidate(cmd).ShouldHaveValidationErrorFor(c => c.Password);
    }

    [Fact]
    public void Validate_PasswordNoDigit_HasError()
    {
        var cmd = ValidCommand() with { Password = "abcdefgh" }; // letters only
        BuildValidator().TestValidate(cmd).ShouldHaveValidationErrorFor(c => c.Password);
    }

    [Fact]
    public void Validate_PasswordExactMinLength_NoError()
    {
        var cmd = ValidCommand() with { Password = "Secre123" }; // exactly 8, letter + digit
        BuildValidator().TestValidate(cmd).ShouldNotHaveValidationErrorFor(c => c.Password);
    }

    // ── Nombre / Apellido ────────────────────────────────────────────────────

    [Fact]
    public void Validate_EmptyNombre_HasError()
    {
        var cmd = ValidCommand() with { Nombre = "" };
        BuildValidator().TestValidate(cmd).ShouldHaveValidationErrorFor(c => c.Nombre);
    }

    [Fact]
    public void Validate_EmptyApellido_HasError()
    {
        var cmd = ValidCommand() with { Apellido = "" };
        BuildValidator().TestValidate(cmd).ShouldHaveValidationErrorFor(c => c.Apellido);
    }

    [Fact]
    public void Validate_NombreTooLong_HasError()
    {
        var cmd = ValidCommand() with { Nombre = new string('a', 101) };
        BuildValidator().TestValidate(cmd).ShouldHaveValidationErrorFor(c => c.Nombre);
    }

    [Fact]
    public void Validate_ApellidoTooLong_HasError()
    {
        var cmd = ValidCommand() with { Apellido = new string('a', 101) };
        BuildValidator().TestValidate(cmd).ShouldHaveValidationErrorFor(c => c.Apellido);
    }

    // ── Rol ──────────────────────────────────────────────────────────────────

    [Theory]
    [InlineData("admin")]
    [InlineData("cajero")]
    [InlineData("operador_ctacte")]
    [InlineData("picadora")]
    [InlineData("jefe_publicidad")]
    [InlineData("productor")]
    [InlineData("diagramacion")]
    [InlineData("reportes")]
    public void Validate_ValidRoles_NoError(string rol)
    {
        var cmd = ValidCommand() with { Rol = rol };
        BuildValidator().TestValidate(cmd).ShouldNotHaveValidationErrorFor(c => c.Rol);
    }

    [Theory]
    [InlineData("superuser")]
    [InlineData("ADMIN")]        // case-sensitive
    [InlineData("root")]
    [InlineData("")]
    public void Validate_InvalidRol_HasError(string rol)
    {
        var cmd = ValidCommand() with { Rol = rol };
        BuildValidator().TestValidate(cmd).ShouldHaveValidationErrorFor(c => c.Rol);
    }

    // ── Email ────────────────────────────────────────────────────────────────

    [Fact]
    public void Validate_InvalidEmail_HasError()
    {
        var cmd = ValidCommand() with { Email = "not-an-email" };
        BuildValidator().TestValidate(cmd).ShouldHaveValidationErrorFor(c => c.Email);
    }

    [Fact]
    public void Validate_EmailTooLong_HasError()
    {
        var cmd = ValidCommand() with { Email = new string('a', 145) + "@b.com" }; // >150
        BuildValidator().TestValidate(cmd).ShouldHaveValidationErrorFor(c => c.Email);
    }
}