#include "passwordreset.h"
#include "numpaddialog.h"
#include <QKeyEvent>
#include "confirmdialog.h"
#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QLineEdit>
#include <QLabel>
#include <QPushButton>
#include <QRegularExpression>
#include "global.h"

PasswordResetPage::PasswordResetPage(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("重置密码界面", 60, C::TEXT, true, col);
    title->setAlignment(Qt::AlignCenter);
    lay->addWidget(title);

    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);

    m_hint = label("请输入 4 位有效密码", 50, C::TEXT_SUB, false, col);
    m_hint->setAlignment(Qt::AlignCenter);
    lay->addWidget(m_hint);

    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, &PasswordResetPage::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, &PasswordResetPage::onBack);
    QPushButton* exit = button("退出", "", col);
    exit->setFixedSize(160, 120);
    exit->setStyleSheet(cancelButtonStyle(60));   // 选中时红底白字
    connect(exit, &QPushButton::clicked, this, &PasswordResetPage::onExit);
    btnRow->addWidget(ok);
    btnRow->addWidget(cancel);
    btnRow->addWidget(exit);
    btnRow->addStretch(1);
    lay->addLayout(btnRow);

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

bool PasswordResetPage::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 PasswordResetPage::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_hint->setText("请输入 4 位有效密码");
        m_hint->setStyleSheet(QString("color:%1;font-size:60px;").arg(C::TEXT_SUB));
    }
}

void PasswordResetPage::onConfirm()
{
    // 校验：4 位数字
    static const QRegularExpression re("^\\d{4}$");
    if (!re.match(m_value).hasMatch()) {
        m_value.clear();              // 校验失败后清空输入框
        m_input->setText(m_value);
        m_hint->setText("密码须为 4 位数字");
        m_hint->setStyleSheet(QString("color:%1;font-size:60px;font-weight:700;").arg(C::DANGER));
        return;
    }
    ctx()->setPassword(m_value);
    clearInput();
    ConfirmDialog::toast(this, "修改成功");   // 2s 后自动消失
    emit navigate(PageBoot);                  // 修改完成，返回开机密码界面
}

void PasswordResetPage::onBack()
{
    clearInput();
    emit navigate(PageMgmt);   // 取消：返回上一界面（密码管理界面）
}

void PasswordResetPage::onExit()
{
    clearInput();
    emit navigate(PageBoot);   // 退出：返回开机密码界面
}

void PasswordResetPage::clearInput()
{
    m_value.clear();
    m_input->setText(m_value);
    m_hint->setText("请输入 4 位有效密码");
    m_hint->setStyleSheet(QString("color:%1;font-size:60px;").arg(C::TEXT_SUB));
}