// SPDX-FileCopyrightText: 2026 Filip Leonarski, Paul Scherrer Institute <filip.leonarski@psi.ch>
// SPDX-License-Identifier: GPL-3.0-only

#include "JFJochViewerMagnifier.h"

#include <QButtonGroup>
#include <QHBoxLayout>
#include <QToolButton>
#include <QVBoxLayout>

JFJochViewerMagnifier::JFJochViewerMagnifier(QWidget *parent) : QWidget(parent) {
    auto layout = new QVBoxLayout(this);
    layout->setContentsMargins(0, 0, 0, 0);

    // Screen pixels per detector pixel and label font size; the labels are sized to fit a
    // six-digit count inside its pixel.
    struct Level { const char *name; const char *tooltip; double zoom; int font_px; };
    const Level levels[] = {
        {"\u00d764", "Pixel values in large text", 64.0, 15},
        {"\u00d732", "Pixel values in small text", 32.0, 9},
        {"\u00d710", "Wider field, no pixel values", 10.0, 0},
    };

    auto buttons = new QHBoxLayout();
    auto group = new QButtonGroup(this);
    for (const auto &l : levels) {
        auto b = new QToolButton(this);
        b->setText(QString::fromUtf8(l.name));
        b->setToolTip(l.tooltip);
        b->setCheckable(true);
        group->addButton(b);
        buttons->addWidget(b);
        connect(b, &QToolButton::toggled, this, [this, l](bool on) {
            if (on)
                image_->SetZoom(l.zoom, l.font_px);
        });
    }
    buttons->addStretch();
    pop_out_ = new QToolButton(this);
    connect(pop_out_, &QToolButton::clicked, this, &JFJochViewerMagnifier::popOutClicked);
    setPoppedOut(false);
    buttons->addWidget(pop_out_);
    layout->addLayout(buttons);

    image_ = new JFJochFollowerImage(this);
    image_->setMinimumHeight(200);
    image_->setToolTip("Move the cursor over the diffraction image with Shift held to move the magnifier");
    image_->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    layout->addWidget(image_, 1);
    connect(image_, &JFJochFollowerImage::fieldChanged, this, &JFJochViewerMagnifier::fieldChanged);

    group->buttons().first()->setChecked(true);
}

void JFJochViewerMagnifier::setPoppedOut(bool on) {
    pop_out_->setText(on ? "Dock" : "Pop out");
    pop_out_->setToolTip(on ? "Put the magnifier back into its panel" : "Show the magnifier in a window of its own");
}

void JFJochViewerMagnifier::setFrame(std::shared_ptr<const QImage> frame) {
    image_->SetFrame(std::move(frame));
}

void JFJochViewerMagnifier::setPixelValues(std::shared_ptr<const JFJochReaderImage> image) {
    image_->SetPixelValues(std::move(image));
}

void JFJochViewerMagnifier::centerAt(QPointF scenePos) {
    image_->CenterAt(scenePos);
}