// SPDX-FileCopyrightText: 2025 Filip Leonarski, Paul Scherrer Institute <filip.leonarski@psi.ch>
// SPDX-License-Identifier: GPL-3.0-only

#include <QCheckBox>
#include <QLabel>
#include <QVBoxLayout>
#include <QLineEdit>
#include <QPushButton>
#include <QColorDialog>
#include <QComboBox>

#include "JFJochViewerSidePanel.h"
#include "widgets/TitleLabel.h"

JFJochViewerSidePanel::JFJochViewerSidePanel(JFJochReader &in_reader, QWidget *parent)
        : reader(in_reader), QWidget(parent) {
    setFixedWidth(250);

    auto layout = new QVBoxLayout(this);

    layout->addWidget(new TitleLabel("Image statistics", this));
    image_stats = new QLabel();
    SetImageStats({});
    layout->addWidget(image_stats);

    layout->addWidget(new TitleLabel("Image features", this));

    auto spotToggleCheckBox = new QCheckBox("Show spots", this);
    spotToggleCheckBox->setCheckState(Qt::CheckState::Checked);

    layout->addWidget(spotToggleCheckBox); // Add checkbox to the grid layout

    connect(spotToggleCheckBox, &QCheckBox::toggled, this, &JFJochViewerSidePanel::spotsToggled);

    resRingsCheckBox = new QCheckBox("Show resolution rings", this);
    resRingsCheckBox->setCheckState(Qt::Checked);
    layout->addWidget(resRingsCheckBox);

    autoResRingsCheckBox = new QCheckBox("Resolution rings auto.", this);
    res_rings_edit = new QLineEdit(this);
    res_rings_edit->setPlaceholderText("Enter non-negative floats, e.g., 1.0,2.5,3.7");
    res_rings_edit->setEnabled(false); // Initially disabled as "Auto Res Rings" is checked by default

    layout->addWidget(autoResRingsCheckBox); // Add the checkbox to the grid layout
    layout->addWidget(res_rings_edit);     // Add the line edit to the grid layout

    auto highestPixelsComboBox = new QComboBox(this);
    highestPixelsComboBox->addItem("0 highest pixels", 0);
    highestPixelsComboBox->addItem("1 highest pixel", 1);
    highestPixelsComboBox->addItem("2 highest pixels", 2);
    highestPixelsComboBox->addItem("3 highest pixels", 3);
    highestPixelsComboBox->addItem("5 highest pixels", 5);
    highestPixelsComboBox->addItem("10 highest pixels", 10);
    highestPixelsComboBox->setCurrentIndex(0);
    layout->addWidget(highestPixelsComboBox);

    connect(highestPixelsComboBox, &QComboBox::currentIndexChanged, this, [this, highestPixelsComboBox](int index) {
        int value = highestPixelsComboBox->itemData(index).toInt();
        emit showHighestPixels(value);
    });

    auto saturatedPixelsCheckBox = new QCheckBox("Show saturated pixels", this);
    layout->addWidget(saturatedPixelsCheckBox);

    connect(saturatedPixelsCheckBox, &QCheckBox::toggled, this, &JFJochViewerSidePanel::saturatedPixelsToggled);

    auto colorSelectButton = new QPushButton("Select feature color", this);
    layout->addWidget(colorSelectButton);

    connect(colorSelectButton, &QPushButton::clicked, this, [this]() {
        QColor color = QColorDialog::getColor(Qt::magenta, this, "Select Feature Color");
        if (color.isValid()) {
            emit setFeatureColor(color);
        }
    });

    auto spotColorSelectButton = new QPushButton("Select spot color", this);
    layout->addWidget(spotColorSelectButton);

    connect(spotColorSelectButton, &QPushButton::clicked, this, [this]() {
        QColor color = QColorDialog::getColor(Qt::green, this, "Select Spot Color");
        if (color.isValid()) {
            emit setSpotColor(color);
        }
    });


    connect(autoResRingsCheckBox, &QCheckBox::toggled, this, &JFJochViewerSidePanel::enableAutoResRings);

    connect(res_rings_edit, &QLineEdit::editingFinished,
            this, &JFJochViewerSidePanel::editingFinished);

    connect(resRingsCheckBox, &QCheckBox::toggled,
            this, &JFJochViewerSidePanel::enableResRings);

    layout->addStretch();
    setLayout(layout); // Set the layout to the widget
}

void JFJochViewerSidePanel::enableAutoResRings(bool input) {
    res_rings_edit->setEnabled(!input); // Enable line edit only if "Auto Res Rings" is unchecked
    if (input) {
        emit autoResRings();
    } else {
        editingFinished();
    }
}

void JFJochViewerSidePanel::SetImageStats(const std::shared_ptr<JFJochReaderImage> &image) {
    QString text;
    if (image != nullptr) {
        text = "Detector: <b>%1</b><br/>"
               "Error pixels: <b>%2</b><br/>"
               "Saturated pixels: <b>%3</b><br/>"
               "Spots: <b>%4</b><br/>"
               "Valid values: <b>%5</b> - <b>%6</b>";
        text = text.arg(QString::fromStdString(image->dataset->detector_name))
                .arg(image->error_pixel.size())
                .arg(image->saturated_pixel.size())
                .arg(image->spots.size())
                .arg(image->valid_pixel.begin()->first)
                .arg(image->valid_pixel.rbegin()->first);
    } else
        text="No file loaded<br/><br/><br/><br/>";

    image_stats->setText(text);
}

void JFJochViewerSidePanel::spotsToggled(bool input) {
    emit showSpots(input);
}

void JFJochViewerSidePanel::editingFinished() {
    QString text = res_rings_edit->text();
    QStringList stringList = text.split(',', Qt::SkipEmptyParts);
    QVector<float> manualResRings;

    bool validInput = true;
    for (const QString &str: stringList) {
        bool ok;
        float value = str.toFloat(&ok);
        if (ok && value >= 0) {
            manualResRings.append(value);
        } else {
            validInput = false;
            break;
        }
    }

    if (!validInput) {
        res_rings_edit->setStyleSheet("border: 1px solid red;"); // Highlight error
    } else {
        res_rings_edit->setStyleSheet(""); // Reset to default style
        emit setResRings(manualResRings); // Update resolution ring vector
    }
}

void JFJochViewerSidePanel::loadImage() {
    auto image = reader.CopyImage();
    SetImageStats(image);
}

void JFJochViewerSidePanel::enableResRings(bool input) {
    if (!input) {
        autoResRingsCheckBox->setEnabled(false);
        res_rings_edit->setEnabled(false);
        emit setResRings({});
    } else {
        autoResRingsCheckBox->setEnabled(true);
        enableAutoResRings(autoResRingsCheckBox->isChecked());
    }
}

void JFJochViewerSidePanel::saturatedPixelsToggled(bool input) {
    emit showSaturatedPixels(input);
}