#include "Glyphs.hpp"

#include <QAbstractButton>
#include <QByteArray>
#include <QDir>
#include <QImage>
#include <QLabel>
#include <QObject>
#include <QPainter>
#include <QPen>
#include <QPixmap>
#include <QPointF>
#include <QRectF>
#include <QSize>
#include <QString>
#include <QSvgRenderer>

#include "Theme.hpp"

namespace geopro::app {

namespace {

// 每个图标的 SVG 内容（线性风格，24x24 视窗，描边由外层注入颜色）。
// 路径取自 Lucide 图标集（MIT 许可，业界通用），保证专业、清晰、语义正确。
QString svgPathFor(Glyph t)
{
    switch (t) {
        case Glyph::Tree:
            return QStringLiteral(
                "<path d='M21 12h-8'/><path d='M21 6H8'/><path d='M21 18h-8'/>"
                "<path d='M3 6v4c0 1.1.9 2 2 2h3'/><path d='M3 10v6c0 1.1.9 2 2 2h3'/>");
        case Glyph::Dataset:
            return QStringLiteral(
                "<ellipse cx='12' cy='5' rx='9' ry='3'/>"
                "<path d='M3 5v14a9 3 0 0 0 18 0V5'/><path d='M3 12a9 3 0 0 0 18 0'/>");
        case Glyph::Map:
            return QStringLiteral(
                "<path d='m12.83 2.18a2 2 0 0 0-1.66 0L2.6 6.08a1 1 0 0 0 0 1.83l8.58 3.91a2 2 0 0 "
                "0 1.66 0l8.58-3.9a1 1 0 0 0 0-1.83Z'/>"
                "<path d='m22 17.65-9.17 4.16a2 2 0 0 1-1.66 0L2 17.65'/>"
                "<path d='m22 12.65-9.17 4.16a2 2 0 0 1-1.66 0L2 12.65'/>");
        case Glyph::Detail:
            return QStringLiteral(
                "<path d='M3 3v18h18'/><path d='M18 17V9'/><path d='M13 17V5'/><path d='M8 17v-3'/>");
        case Glyph::Anomaly:
            return QStringLiteral(
                "<path d='m21.73 18-8-14a2 2 0 0 0-3.48 0l-8 14A2 2 0 0 0 4 21h16a2 2 0 0 0 "
                "1.73-3Z'/><path d='M12 9v4'/><path d='M12 17h.01'/>");
        case Glyph::Property:
            return QStringLiteral(
                "<circle cx='12' cy='12' r='10'/><path d='M12 16v-4'/><path d='M12 8h.01'/>");
        case Glyph::Plus:
            return QStringLiteral("<path d='M5 12h14'/><path d='M12 5v14'/>");
        case Glyph::Filter:
            return QStringLiteral(
                "<polygon points='22 3 2 3 10 12.46 10 19 14 21 14 12.46 22 3'/>");
        case Glyph::Upload:
            return QStringLiteral(
                "<path d='M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4'/>"
                "<path d='M17 8l-5-5-5 5'/><path d='M12 3v12'/>");
        case Glyph::Download:
            return QStringLiteral(
                "<path d='M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4'/>"
                "<path d='M7 10l5 5 5-5'/><path d='M12 15V3'/>");
        case Glyph::Collapse:
            return QStringLiteral("<path d='m17 11-5-5-5 5'/><path d='m17 18-5-5-5 5'/>");
        case Glyph::Workspace:
            return QStringLiteral(
                "<rect width='7' height='7' x='3' y='3' rx='1'/>"
                "<rect width='7' height='7' x='14' y='3' rx='1'/>"
                "<rect width='7' height='7' x='14' y='14' rx='1'/>"
                "<rect width='7' height='7' x='3' y='14' rx='1'/>");
        case Glyph::Folder:
            return QStringLiteral(
                "<path d='M20 20a2 2 0 0 0 2-2V8a2 2 0 0 0-2-2h-7.9a2 2 0 0 1-1.69-.9L9.6 3.9A2 2 0 "
                "0 0 7.93 3H4a2 2 0 0 0-2 2v13a2 2 0 0 0 2 2Z'/>");
        case Glyph::Help:
            return QStringLiteral(
                "<circle cx='12' cy='12' r='10'/>"
                "<path d='M9.09 9a3 3 0 0 1 5.83 1c0 2-3 3-3 3'/><path d='M12 17h.01'/>");
        case Glyph::Bell:
            return QStringLiteral(
                "<path d='M6 8a6 6 0 0 1 12 0c0 7 3 9 3 9H3s3-2 3-9'/>"
                "<path d='M10.3 21a1.94 1.94 0 0 0 3.4 0'/>");
        case Glyph::Gear:
            return QStringLiteral(
                "<path d='M12.22 2h-.44a2 2 0 0 0-2 2v.18a2 2 0 0 1-1 1.73l-.43.25a2 2 0 0 1-2 "
                "0l-.15-.08a2 2 0 0 0-2.73.73l-.22.38a2 2 0 0 0 .73 2.73l.15.1a2 2 0 0 1 1 "
                "1.72v.51a2 2 0 0 1-1 1.74l-.15.09a2 2 0 0 0-.73 2.73l.22.38a2 2 0 0 0 2.73 "
                ".73l.15-.08a2 2 0 0 1 2 0l.43.25a2 2 0 0 1 1 1.73V20a2 2 0 0 0 2 2h.44a2 2 0 0 0 "
                "2-2v-.18a2 2 0 0 1 1-1.73l.43-.25a2 2 0 0 1 2 0l.15.08a2 2 0 0 0 2.73-.73l.22-.39a2 "
                "2 0 0 0-.73-2.73l-.15-.08a2 2 0 0 1-1-1.74v-.5a2 2 0 0 1 1-1.74l.15-.09a2 2 0 0 0 "
                ".73-2.73l-.22-.38a2 2 0 0 0-2.73-.73l-.15.08a2 2 0 0 1-2 0l-.43-.25a2 2 0 0 "
                "1-1-1.73V4a2 2 0 0 0-2-2z'/><circle cx='12' cy='12' r='3'/>");
    }
    return QString();
}

}  // namespace

QIcon makeGlyph(Glyph type, const QColor& color, int px, int padRight)
{
    const QString svg =
        QStringLiteral("<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' "
                       "stroke='%1' stroke-width='2' stroke-linecap='round' "
                       "stroke-linejoin='round'>%2</svg>")
            .arg(color.name(), svgPathFor(type));

    QSvgRenderer renderer(svg.toUtf8());

    // 以 3x 超采样渲染再设 devicePixelRatio，保证在任意缩放/DPI 下都清晰。
    constexpr qreal kSuper = 3.0;
    const int dim = qRound(px * kSuper);                 // 图标本体边长(方形)
    const int dimW = qRound((px + padRight) * kSuper);   // 含右透明内边距的画布宽
    QImage img(dimW, dim, QImage::Format_ARGB32_Premultiplied);
    img.fill(Qt::transparent);
    QPainter p(&img);
    p.setRenderHint(QPainter::Antialiasing, true);
    renderer.render(&p, QRectF(0, 0, dim, dim));  // 图标居左方形渲染，右侧 padRight 留透明
    p.end();

    QPixmap pm = QPixmap::fromImage(img);
    pm.setDevicePixelRatio(kSuper);
    return QIcon(pm);
}

QString writeChevronIcon(bool open, const QColor& color)
{
    constexpr int px = 16;
    constexpr int kScale = 3;
    QPixmap pm(px * kScale, px * kScale);
    pm.fill(Qt::transparent);

    QPainter p(&pm);
    p.setRenderHint(QPainter::Antialiasing, true);
    QPen pen(color, px * kScale * 0.1);
    pen.setCapStyle(Qt::RoundCap);
    pen.setJoinStyle(Qt::RoundJoin);
    p.setPen(pen);

    const double w = px * kScale;
    const double h = px * kScale;
    if (open) {  // ▼ 向下
        p.drawLine(QPointF(w * 0.32, h * 0.42), QPointF(w * 0.5, h * 0.60));
        p.drawLine(QPointF(w * 0.5, h * 0.60), QPointF(w * 0.68, h * 0.42));
    } else {  // ▶ 向右
        p.drawLine(QPointF(w * 0.42, h * 0.32), QPointF(w * 0.60, h * 0.5));
        p.drawLine(QPointF(w * 0.60, h * 0.5), QPointF(w * 0.42, h * 0.68));
    }
    p.end();

    const QString path =
        QDir(QDir::tempPath()).filePath(open ? QStringLiteral("geopro_tree_open.png")
                                             : QStringLiteral("geopro_tree_closed.png"));
    pm.save(path, "PNG");
    return path;
}

QString writeCheckboxIcon(bool checked, const QColor& border, const QColor& fill, const QColor& check,
                          const QString& tag)
{
    constexpr int px = 16;
    constexpr int kScale = 3;
    QPixmap pm(px * kScale, px * kScale);
    pm.fill(Qt::transparent);

    QPainter p(&pm);
    p.setRenderHint(QPainter::Antialiasing, true);
    const double s = px * kScale;
    const double inset = s * 0.14;
    const QRectF box(inset, inset, s - 2 * inset, s - 2 * inset);
    const double r = s * 0.14;

    if (checked) {
        p.setPen(Qt::NoPen);
        p.setBrush(fill);
        p.drawRoundedRect(box, r, r);
        QPen cpen(check, s * 0.12);
        cpen.setCapStyle(Qt::RoundCap);
        cpen.setJoinStyle(Qt::RoundJoin);
        p.setPen(cpen);
        p.drawLine(QPointF(s * 0.30, s * 0.52), QPointF(s * 0.44, s * 0.66));
        p.drawLine(QPointF(s * 0.44, s * 0.66), QPointF(s * 0.70, s * 0.34));
    } else {
        QPen bpen(border, s * 0.085);
        p.setPen(bpen);
        p.setBrush(fill);
        p.drawRoundedRect(box, r, r);
    }
    p.end();

    const QString path = QDir(QDir::tempPath())
                             .filePath(QStringLiteral("geopro_chk_%1_%2.png")
                                           .arg(tag, checked ? QStringLiteral("on")
                                                             : QStringLiteral("off")));
    pm.save(path, "PNG");
    return path;
}

namespace {
// 当前主题下的 chrome 图标色：取主题主文本色（暗=浅、亮=深），保证两种模式都清晰。
QColor themedIconColor()
{
    return isDarkTheme() ? QColor(0xE6, 0xE8, 0xEB) : QColor(0x1F, 0x2A, 0x3D);  // 主文字明/暗
}
}  // namespace

void setThemedGlyph(QLabel* label, Glyph type, int px)
{
    if (!label) return;
    auto apply = [label, type, px]() {
        label->setPixmap(makeGlyph(type, themedIconColor(), px).pixmap(px, px));
    };
    apply();
    QObject::connect(&ThemeManager::instance(), &ThemeManager::changed, label, [apply]() { apply(); });
}

void setThemedGlyph(QAbstractButton* button, Glyph type, int px, int padRight)
{
    if (!button) return;
    auto apply = [button, type, px, padRight]() {
        button->setIcon(makeGlyph(type, themedIconColor(), px, padRight));
        if (padRight > 0) button->setIconSize(QSize(px + padRight, px));  // 含右内边距，文字被右推
    };
    apply();
    QObject::connect(&ThemeManager::instance(), &ThemeManager::changed, button, [apply]() { apply(); });
}

}  // namespace geopro::app