#include "ui/connectionwizard.h"
#include <QMessageBox>
#include <QTimer>
#include <QDebug>
#include <QSslSocket>

ConnectionWizard::ConnectionWizard(QWidget *parent, AccountService *accountService)
    : QWizard(parent), m_accountService(accountService)
{
    setWindowTitle("Configurar conexión de correo");
    setWizardStyle(QWizard::ModernStyle);
    setOption(QWizard::HaveHelpButton, false);
    setOption(QWizard::HaveFinishButtonOnEarlyPages, true);

    setupPageIntro();
    setupPageIncoming();
    setupPageOutgoing();
    setupPageAuth();
    setupPageTest();

    // Set page order
    addPage(m_introPage);
    addPage(m_incomingPage);
    addPage(m_outgoingPage);
    addPage(m_authPage);
    addPage(m_testPage);

    // Start at intro
    startId();
}

void ConnectionWizard::setupPageIntro()
{
    m_introPage = new QWizardPage(this);
    m_introPage->setTitle("Configuración de conexión");
    m_introPage->setSubTitle("Introduce los datos de los servidores entrantes y salientes para configurar tu cuenta de correo.");

    QVBoxLayout *lay = new QVBoxLayout(m_introPage);
    QLabel *info = new QLabel(
        "Este asistente te guiará paso a paso para configurar los servidores IMAP/POP3 y SMTP.\\n"
        "Si no conoces los datos, consulta a tu proveedor de correo o busca en sus páginas de soporte."
    );
    info->setWordWrap(true);
    lay->addWidget(info);
    lay->addStretch();
    m_introPage->setLayout(lay);
}

void ConnectionWizard::setupPageIncoming()
{
    m_incomingPage = new QWizardPage(this);
    m_incomingPage->setTitle("Servidor entrante (IMAP/POP3)");
    m_incomingPage->setSubTitle("Configura el servidor que recibirá tus correos.");

    QFormLayout *form = new QFormLayout();
    m_incomingTypeCombo = new QComboBox();
    m_incomingTypeCombo->addItem("IMAP", QVariant::fromValue(QString("imap")));
    m_incomingTypeCombo->addItem("POP3", QVariant::fromValue(QString("pop3")));
    form->addRow("Tipo:", m_incomingTypeCombo);

    m_incomingHostEdit = new QLineEdit();
    m_incomingHostEdit->setPlaceholderText("ej. imap.ejemplo.com");
    form->addRow("Servidor:", m_incomingHostEdit);

    m_incomingPortEdit = new QLineEdit();
    m_incomingPortEdit->setPlaceholderText("993");
    m_incomingPortEdit->setValidator(new QIntValidator(1, 65535, this));
    form->addRow("Puerto:", m_incomingPortEdit);

    m_incomingSslCheck = new QCheckBox("Usar conexión segura (SSL/TLS)");
    m_incomingSslCheck->setChecked(true);
    form->addRow("", m_incomingSslCheck);

    m_incomingPage->setLayout(form);
}

void ConnectionWizard::setupPageOutgoing()
{
    m_outgoingPage = new QWizardPage(this);
    m_outgoingPage->setTitle("Servidor saliente (SMTP)");
    m_outgoingPage->setSubTitle("Configura el servidor que enviará tus correos.");

    QFormLayout *form = new QFormLayout();
    m_outgoingHostEdit = new QLineEdit();
    m_outgoingHostEdit->setPlaceholderText("ej. smtp.ejemplo.com");
    form->addRow("Servidor:", m_outgoingHostEdit);

    m_outgoingPortEdit = new QLineEdit();
    m_outgoingPortEdit->setPlaceholderText("587");
    m_outgoingPortEdit->setValidator(new QIntValidator(1, 65535, this));
    form->addRow("Puerto:", m_outgoingPortEdit);

    m_outgoingSslCheck = new QCheckBox("Usar conexión segura (STARTTLS/SSL)");
    m_outgoingSslCheck->setChecked(true);
    form->addRow("", m_outgoingSslCheck);

    m_outgoingPage->setLayout(form);
}

void ConnectionWizard::setupPageAuth()
{
    m_authPage = new QWizardPage(this);
    m_authPage->setTitle("Autenticación");
    m_authPage->setSubTitle("Introduce tu nombre de usuario y contraseña para acceder a los servidores.");

    QFormLayout *form = new QFormLayout();
    m_usernameEdit = new QLineEdit();
    m_usernameEdit->setPlaceholderText("tu-usuario@dominio.com");
    form->addRow("Usuario:", m_usernameEdit);

    m_passwordEdit = new QLineEdit();
    m_passwordEdit->setEchoMode(QLineEdit::Password);
    m_passwordEdit->setPlaceholderText("Contraseña");
    form->addRow("Contraseña:", m_passwordEdit);

    m_authMethodCombo = new QComboBox();
    m_authMethodCombo->addItem("Contraseña normal", QVariant::fromValue(QString("plain")));
    m_authMethodCombo->addItem("Autenticación OAuth2", QVariant::fromValue(QString("oauth2")));
    form->addRow("Método:", m_authMethodCombo);

    m_authPage->setLayout(form);
}

void ConnectionWizard::setupPageTest()
{
    m_testPage = new QWizardPage(this);
    m_testPage->setTitle("Probar conexión");
    m_testPage->setSubTitle("Verifica que los datos ingresados sean correctos.");

    QVBoxLayout *lay = new QVBoxLayout(m_testPage);
    m_testStatusLabel = new QLabel("Listo para probar la conexión.");
    m_testStatusLabel->setAlignment(Qt::AlignCenter);
    m_testStatusLabel->setStyleSheet("font-size: 14px; color: #555;");
    lay->addWidget(m_testStatusLabel);

    m_testDetailLabel = new QLabel("");
    m_testDetailLabel->setWordWrap(true);
    m_testDetailLabel->setAlignment(Qt::AlignCenter);
    m_testDetailLabel->setStyleSheet("font-size: 12px; color: #888;");
    lay->addWidget(m_testDetailLabel);

    lay->addStretch();

    m_testButton = new QPushButton("Probar conexión ahora");
    m_testButton->setStyleSheet(
        "QPushButton { background-color: #0071e3; color: white; border: none; padding: 8px 16px; border-radius: 4px; }"
        "QPushButton:hover { background-color: #005bb5; }"
    );
    lay->addWidget(m_testButton, 0, Qt::AlignCenter);

    connect(m_testButton, &QPushButton::clicked, this, &ConnectionWizard::onTestClicked);

    m_testPage->setLayout(lay);
}

void ConnectionWizard::onTestClicked()
{
    if (!m_accountService) {
        m_testStatusLabel->setText("⚠️ Servicio de cuenta no disponible.");
        m_testStatusLabel->setStyleSheet("color: #e60000;");
        m_testDetailLabel->setText("El servicio de cuenta no está inicializado.");
        return;
    }

    Account::ConnectionSettings settings = connectionSettings();
    // Basic validation
    if (settings.incomingHost.isEmpty() || settings.username.isEmpty() || settings.password.isEmpty()) {
        m_testStatusLabel->setText("⚠️ Faltan datos obligatorios.");
        m_testStatusLabel->setStyleSheet("color: #e60000;");
        m_testDetailLabel->setText("Por favor, completa los campos de servidor entrante, usuario y contraseña.");
        return;
    }

    m_testStatusLabel->setText("⏳ Probando conexión...");
    m_testStatusLabel->setStyleSheet("color: #0071e3;");
    m_testDetailLabel->setText("Conectando al servidor IMAP...");

    // Use a small delay to allow UI update before blocking call
    QTimer::singleShot(0, this, [this, settings]() {
        QString errorMsg;
        bool ok = m_accountService->testConnection(settings, errorMsg);
        if (ok) {
            m_testStatusLabel->setText("✅ Conexión exitosa.");
            m_testStatusLabel->setStyleSheet("color: #34c759;");
            m_testDetailLabel->setText("Los datos ingresados son correctos. Puedes finalizar la configuración.");
        } else {
            m_testStatusLabel->setText("❌ Error de conexión.");
            m_testStatusLabel->setStyleSheet("color: #ff3b30;");
            m_testDetailLabel->setText(errorMsg.isEmpty() ? "Error desconocido." : errorMsg);
        }
    });
}

Account::ConnectionSettings ConnectionWizard::connectionSettings() const
{
    Account::ConnectionSettings s;
    // Incoming
    s.type = m_incomingTypeCombo->currentData().toString(); // "imap" or "pop3"
    s.incomingHost = m_incomingHostEdit->text().trimmed();
    s.incomingPort = m_incomingPortEdit->text().toInt();
    s.incomingSsl = m_incomingSslCheck->isChecked();

    // Outgoing (SMTP)
    s.outgoingHost = m_outgoingHostEdit->text().trimmed();
    s.outgoingPort = m_outgoingPortEdit->text().toInt();
    s.outgoingSsl = m_outgoingSslCheck->isChecked();

    // Auth
    s.username = m_usernameEdit->text().trimmed();
    s.password = m_passwordEdit->text();
    s.authMethod = m_authMethodCombo->currentData().toString(); // "plain" or "oauth2"

    return s;
}

void ConnectionWizard::accept()
{
    // When Finish is pressed, emit the settings and close
    Account::ConnectionSettings settings = connectionSettings();
    emit settingsReady(settings);
    QWizard::accept();
}
ConnectionWizard::~ConnectionWizard() = default;