#include "PanelHeader.hpp"

#include "Theme.hpp"

#include <ElaIconButton.h>
#include <ElaToolButton.h>

#include <QButtonGroup>
#include <QColor>
#include <QHBoxLayout>
#include <QLabel>
#include <QSize>
#include <QStackedWidget>
#include <QToolButton>
#include <QVBoxLayout>
#include <QWidget>

namespace geopro::app {

namespace {

// ── 专业图标/字号尺寸（统一放大）──
constexpr int kHeaderHeight = 42;
constexpr int kTitleIcon = 20;   // 表头标题图标
constexpr int kActionIcon = 19;  // 表头操作按钮图标
constexpr int kTabIcon = 19;     // Tab 图标

// 表头统一样式（标准表头 + Tab 表头共用）。字号/字重引用 Theme 排版令牌：
// 面板标题=title(15)、徽标=caption(12)、Tab 文本=body(13)，加粗统一 semibold。
// #panelBadge 为中性计数徽标；#panelBadgeWarn 为“需注意”变体（语义 warning 色），
// 供异常计数等承载“待复查”含义的徽标使用（调用方改 objectName 即切换）。
// 表头底/标题/徽标样式。Tab(ElaToolButton)与操作按钮(ElaIconButton)自绘 Fluent，
// 不再写它们的 QSS（选中态由 Ela 的 checked 高亮表达，而非自定义下划线）。
QString headerQss()
{
    return QStringLiteral(
               "#panelHeader { background:#FFFFFF; border-bottom:1px solid #E6EAF1; }"
               "#panelTitle { color:#1F2A3D; font-size:%1px; font-weight:%3; }"
               "#panelBadge { background:#EAEEF5; color:#5A6B85; border-radius:9px;"
               "  padding:1px 7px; font-size:%2px; font-weight:%3; }"
               "#panelBadgeWarn { background:%4; color:%5; border-radius:9px;"
               "  padding:1px 7px; font-size:%2px; font-weight:%3; }")
        .arg(type::kTitle)
        .arg(type::kCaption)
        .arg(type::kWeightSemibold)
        .arg(QString::fromUtf8(semantic::kWarningFill))
        .arg(QString::fromUtf8(semantic::kWarning));
}

// 数量徽标（默认隐藏，调用方 setText+setVisible 显示）。
QLabel* makeBadge(QWidget* parent)
{
    auto* badge = new QLabel(parent);
    badge->setObjectName(QStringLiteral("panelBadge"));
    badge->setAlignment(Qt::AlignCenter);
    badge->setMinimumWidth(16);
    badge->setVisible(false);
    return badge;
}

// 表头操作按钮（Fluent ElaIconButton；图标沿用项目 glyph 像素图）。
QWidget* makeActionButton(QWidget* parent, const HeaderAction& a)
{
    auto* btn = new ElaIconButton(
        makeGlyph(a.first, QColor("#5A6B85"), kActionIcon).pixmap(kActionIcon, kActionIcon), parent);
    btn->setFixedSize(30, 30);  // QPixmap 构造不设尺寸，显式固定防变形
    btn->setCursor(Qt::PointingHandCursor);
    btn->setToolTip(a.second + QStringLiteral("（占位）"));
    return btn;
}

}  // namespace

QWidget* buildPanelHeader(Glyph icon, const QString& title, const QVector<HeaderAction>& actions)
{
    auto* header = new QWidget();
    header->setObjectName(QStringLiteral("panelHeader"));
    header->setFixedHeight(kHeaderHeight);
    geopro::app::applyThemedStyleSheet(header, headerQss());

    auto* lay = new QHBoxLayout(header);
    lay->setContentsMargins(12, 0, 8, 0);
    lay->setSpacing(8);

    auto* iconLbl = new QLabel(header);
    iconLbl->setPixmap(makeGlyph(icon, QColor("#44546B"), kTitleIcon).pixmap(kTitleIcon, kTitleIcon));
    lay->addWidget(iconLbl);

    auto* titleLbl = new QLabel(title, header);
    titleLbl->setObjectName(QStringLiteral("panelTitle"));
    lay->addWidget(titleLbl);

    lay->addWidget(makeBadge(header));  // 默认隐藏，调用方可经 findChild 更新

    lay->addStretch();

    for (const auto& a : actions) lay->addWidget(makeActionButton(header, a));

    return header;
}

TabbedPanel buildTabbedPanel(const QVector<PanelTab>& tabs, const QVector<HeaderAction>& actions)
{
    auto* box = new QWidget();
    auto* v = new QVBoxLayout(box);
    v->setContentsMargins(0, 0, 0, 0);
    v->setSpacing(0);

    auto* header = new QWidget(box);
    header->setObjectName(QStringLiteral("panelHeader"));
    header->setFixedHeight(kHeaderHeight);
    geopro::app::applyThemedStyleSheet(header, headerQss());
    auto* hlay = new QHBoxLayout(header);
    hlay->setContentsMargins(10, 0, 8, 0);
    hlay->setSpacing(2);

    auto* stack = new QStackedWidget(box);
    auto* group = new QButtonGroup(box);
    group->setExclusive(true);

    TabbedPanel result;
    result.container = box;

    for (int i = 0; i < tabs.size(); ++i) {
        const PanelTab& t = tabs[i];
        auto* btn = new ElaToolButton(header);  // Fluent tab(选中态由 Ela checked 高亮)
        btn->setObjectName(QStringLiteral("tabBtn"));
        btn->setText(t.title);
        btn->setIcon(makeGlyph(t.icon, QColor("#5A6B85"), kTabIcon));
        btn->setIconSize(QSize(kTabIcon, kTabIcon));
        btn->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
        btn->setCheckable(true);
        btn->setCursor(Qt::PointingHandCursor);
        group->addButton(btn, i);
        hlay->addWidget(btn);

        QLabel* badge = nullptr;
        if (t.hasBadge) {
            badge = makeBadge(header);
            hlay->addWidget(badge);
        }
        result.badges.append(badge);

        stack->addWidget(t.content);
        hlay->addSpacing(10);
    }

    hlay->addStretch();
    for (const auto& a : actions) hlay->addWidget(makeActionButton(header, a));

    QObject::connect(group, &QButtonGroup::idClicked, stack, &QStackedWidget::setCurrentIndex);
    if (auto* first = group->button(0)) first->setChecked(true);
    stack->setCurrentIndex(0);

    v->addWidget(header);
    v->addWidget(stack, 1);

    return result;
}

}  // namespace geopro::app