#include "passwordmgmtlogin.h"
#include "numpaddialog.h"
#include <QKeyEvent>
#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QLineEdit>
#include <QLabel>
#include <QPushButton>
#include "global.h"

PasswordMgmtLoginPage::PasswordMgmtLoginPage(AppContext* ctx, QWidget* parent)
    : BasePage(ctx, parent)
{
    QVBoxLayout* root = new QVBoxLayout(this);
    root->addStretch(1);

    QWidget* col = new QWidget(this);
    col->setFixedWidth(700);
    QVBoxLayout* lay = new QVBoxLayout(col);
    lay->setSpacing(50);
    lay->setAlignment(Qt::AlignHCenter);

    QLabel* title = label("密码管理登录界面", 60, C::TEXT, true, col);
    title->setAlignment(Qt::AlignCenter);
    lay->addWidget(title);

    QLabel* sub = label("请输入管理员密码", 40, C::TEXT_SUB, false, col);
    sub->setAlignment(Qt::AlignCenter);
    lay->addWidget(sub);

    m_input = new QLineEdit(col);
    m_input->setReadOnly(true);
    m_input->setEchoMode(QLineEdit::Password);
    m_input->setAlignment(Qt::AlignCenter);
    m_input->setFixedSize(400, 90);
    m_input->setStyleSheet("font-size:60px;");
    m_input->setFocusPolicy(Qt::StrongFocus);
    m_input->installEventFilter(this);
    lay->addWidget(m_input, 0, Qt::AlignHCenter);

    // 错误提示（预留固定高度，出现/消失不影响下方按钮位置）
    m_error = new QLabel(col);
    m_error->setAlignment(Qt::AlignCenter);
    m_error->setFixedHeight(56);
    m_error->setStyleSheet("color:#E5484D;font-size:40px;font-weight:700;");
    lay->addWidget(m_error);

    QHBoxLayout* btnRow = new QHBoxLayout();
    btnRow->setSpacing(80);
    btnRow->addStretch(1);
    QPushButton* ok = button("确认", "", col);
    ok->setFixedSize(160, 120);
    ok->setStyleSheet("font-size:60px;");
    connect(ok, &QPushButton::clicked, this, &PasswordMgmtLoginPage::onConfirm);
    QPushButton* cancel = button("取消", "", col);
    cancel->setFixedSize(160, 120);
    cancel->setStyleSheet(cancelButtonStyle(60));   // 选中时红底白字
    connect(cancel, &QPushButton::clicked, this, &PasswordMgmtLoginPage::onCancel);
    btnRow->addWidget(ok);
    btnRow->addWidget(cancel);
    btnRow->addStretch(1);
    lay->addLayout(btnRow);

    root->addWidget(col, 0, Qt::AlignHCenter);
    root->addStretch(1);
}

bool PasswordMgmtLoginPage::eventFilter(QObject* obj, QEvent* ev)
{
    if (obj == m_input) {
        if (ev->type() == QEvent::MouseButtonPress) {
            onInputClicked();
            return true;
        }
        if (ev->type() == QEvent::KeyPress) {
            QKeyEvent* ke = static_cast<QKeyEvent*>(ev);
            // 空格当“点击”：Tab 聚焦后按空格弹出数字键盘
            if (Keys::space(ke->key())) {
                onInputClicked();
                return true;
            }
        }
    }
    return BasePage::eventFilter(obj, ev);
}

void PasswordMgmtLoginPage::onInputClicked()
{
    NumPadDialog dlg(this);
    dlg.setMaxLen(4);
    dlg.setValue(m_value);
    if (dlg.exec() == QDialog::Accepted) {
        m_value = dlg.value();
        m_input->setText(m_value);
        m_error->setText("");
    }
}

void PasswordMgmtLoginPage::onConfirm()
{
    if (m_value == ctx()->adminPassword()) {
        clearInput();
        emit navigate(PageMgmt);
    } else {
        m_value.clear();              // 输错后清空输入框
        m_input->setText(m_value);
        m_error->setText("管理员密码错误");
    }
}

void PasswordMgmtLoginPage::onCancel()
{
    clearInput();
    emit navigate(PageBoot);
}

void PasswordMgmtLoginPage::clearInput()
{
    m_value.clear();
    m_input->setText(m_value);
    m_error->setText("");
}