#include "PanelHeader.hpp"

#include "Theme.hpp"

#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 + 页签样式。页签选中态 = 强调色文字 + 2px 强调色下划线，
// 与视图/详情工具条完全一致（全 UI 切换控件统一这一套）。操作按钮(ElaIconButton)自绘 Fluent。
QString headerQss()
{
    return QStringLiteral(
               "#panelHeader { background:{{bg/panel}}; border-bottom:1px solid {{divider}}; }"
               "#panelTitle { color:{{text/primary}}; font-size:%1px; font-weight:%3; }"
               "#panelBadge { background:{{bg/hover}}; color:{{text/secondary}}; border-radius:9px;"
               "  padding:1px 7px; font-size:%2px; font-weight:%3; }"
               "#panelBadgeWarn { background:{{status/warning-bg}}; color:{{status/warning}}; border-radius:9px;"
               "  padding:1px 7px; font-size:%2px; font-weight:%3; }"
               "QToolButton#panelAction { border:none; border-radius:7px; padding:5px; }"
               "QToolButton#panelAction:hover { background:{{bg/hover}}; }"
               "QToolButton#tabBtn { border:none; border-bottom:2px solid transparent; color:{{text/secondary}};"
               "  padding:8px 6px; font-size:%4px; }"
               "QToolButton#tabBtn:hover { color:{{text/primary}}; }"
               "QToolButton#tabBtn:checked { color:{{accent/primary}}; font-weight:%3;"
               "  border-bottom:2px solid {{accent/primary}}; }")
        .arg(scaledPx(type::kTitle))    // %1 标题字号
        .arg(scaledPx(type::kCaption))  // %2 徽标字号
        .arg(type::kWeightSemibold)     // %3 字重（多处）
        .arg(scaledPx(type::kBody));    // %4 页签字号
}

// 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（QToolButton + 项目 glyph 图标，随主题着色；悬停底由 #panelAction QSS 给）。
QWidget* makeActionButton(QWidget* parent, const HeaderAction& a)
{
    auto* btn = new QToolButton(parent);
    btn->setObjectName(QStringLiteral("panelAction"));
    btn->setProperty("glyphId", static_cast<int>(a.first));  // 供调用方按图标定位并连接真实功能
    setThemedGlyph(btn, a.first, kActionIcon);
    btn->setIconSize(QSize(kActionIcon, kActionIcon));
    btn->setCursor(Qt::PointingHandCursor);
    btn->setToolTip(a.second + QStringLiteral("（占位）"));
    btn->setAutoRaise(true);
    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::applyTokenizedStyleSheet(header, headerQss());

    auto* lay = new QHBoxLayout(header);
    lay->setContentsMargins(12, 0, 8, 0);
    lay->setSpacing(geopro::app::space::kSm);

    auto* iconLbl = new QLabel(header);
    setThemedGlyph(iconLbl, icon, kTitleIcon);  // 随主题着色（暗色下也清晰）
    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::applyTokenizedStyleSheet(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;
    result.tabGroup = group;

    for (int i = 0; i < tabs.size(); ++i) {
        const PanelTab& t = tabs[i];
        auto* btn = new QToolButton(header);  // 页签与工具条统一: QToolButton + 强调色下划线 QSS
        btn->setObjectName(QStringLiteral("tabBtn"));
        btn->setText(t.title);
        setThemedGlyph(btn, t.icon, kTabIcon, kGlyphTextGapPad);  // 随主题着色 + 图标→文字6px(§6.7)
        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;
}

SegmentedHeader buildSegmentedHeader(const QVector<QString>& segments,
                                     const QVector<HeaderAction>& actions)
{
    auto* header = new QWidget();
    header->setObjectName(QStringLiteral("panelHeader"));
    header->setFixedHeight(kHeaderHeight);
    geopro::app::applyTokenizedStyleSheet(header, headerQss());

    auto* hlay = new QHBoxLayout(header);
    hlay->setContentsMargins(10, 0, 8, 0);
    hlay->setSpacing(2);

    auto* group = new QButtonGroup(header);
    group->setExclusive(true);

    SegmentedHeader result;
    result.header = header;

    for (int i = 0; i < segments.size(); ++i) {
        auto* btn = new QToolButton(header);  // 与异常/属性页签统一: tabBtn 样式 + 强调色下划线
        btn->setObjectName(QStringLiteral("tabBtn"));
        btn->setText(segments[i]);
        btn->setCheckable(true);
        btn->setCursor(Qt::PointingHandCursor);
        group->addButton(btn, i);
        hlay->addWidget(btn);
        hlay->addSpacing(10);
        result.buttons.append(btn);
    }

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

    if (!result.buttons.isEmpty()) result.buttons[0]->setChecked(true);
    return result;
}

}  // namespace geopro::app