// MIT License
//
// Copyright (c) 2018-2025 Jakub Melka and Contributors
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

#include "pdfcertificatemanagerdialog.h"
#include "ui_pdfcertificatemanagerdialog.h"
#include "pdfcreatecertificatedialog.h"

#include "pdfwidgetutils.h"

#include <QAction>
#include <QPushButton>
#include <QFileSystemModel>
#include <QDesktopServices>
#include <QMessageBox>
#include <QFileDialog>
#include <QStandardPaths>

namespace pdf
{

PDFCertificateManagerDialog::PDFCertificateManagerDialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::PDFCertificateManagerDialog),
    m_newCertificateButton(nullptr),
    m_openCertificateDirectoryButton(nullptr),
    m_deleteCertificateButton(nullptr),
    m_importCertificateButton(nullptr),
    m_certificateFileModel(nullptr)
{
    ui->setupUi(this);

    QDir::root().mkpath(PDFCertificateManager::getCertificateDirectory());

    m_certificateFileModel = new QFileSystemModel(this);
    QModelIndex rootIndex = m_certificateFileModel->setRootPath(PDFCertificateManager::getCertificateDirectory());
    ui->fileView->setModel(m_certificateFileModel);
    ui->fileView->setRootIndex(rootIndex);

    m_newCertificateButton = ui->buttonBox->addButton(tr("Create"), QDialogButtonBox::ActionRole);
    m_openCertificateDirectoryButton = ui->buttonBox->addButton(tr("Open Directory"), QDialogButtonBox::ActionRole);
    m_deleteCertificateButton = ui->buttonBox->addButton(tr("Delete"), QDialogButtonBox::ActionRole);
    m_importCertificateButton = ui->buttonBox->addButton(tr("Import"), QDialogButtonBox::ActionRole);

    connect(m_newCertificateButton, &QPushButton::clicked, this, &PDFCertificateManagerDialog::onNewCertificateClicked);
    connect(m_openCertificateDirectoryButton, &QPushButton::clicked, this, &PDFCertificateManagerDialog::onOpenCertificateDirectoryClicked);
    connect(m_deleteCertificateButton, &QPushButton::clicked, this, &PDFCertificateManagerDialog::onDeleteCertificateClicked);
    connect(m_importCertificateButton, &QPushButton::clicked, this, &PDFCertificateManagerDialog::onImportCertificateClicked);

    setMinimumSize(pdf::PDFWidgetUtils::scaleDPI(this, QSize(640, 480)));
}

PDFCertificateManagerDialog::~PDFCertificateManagerDialog()
{
    delete ui;
}

void PDFCertificateManagerDialog::onNewCertificateClicked()
{
    PDFCreateCertificateDialog dialog(this);
    if (dialog.exec() == PDFCreateCertificateDialog::Accepted)
    {
        const PDFCertificateManager::NewCertificateInfo info = dialog.getNewCertificateInfo();
        m_certificateManager.createCertificate(info);
    }
}

void PDFCertificateManagerDialog::onOpenCertificateDirectoryClicked()
{
    QDesktopServices::openUrl(QString("file:///%1").arg(PDFCertificateManager::getCertificateDirectory(), QUrl::TolerantMode));
}

void PDFCertificateManagerDialog::onDeleteCertificateClicked()
{
    QFileInfo fileInfo = m_certificateFileModel->fileInfo(ui->fileView->currentIndex());
    if (fileInfo.exists())
    {
        if (QMessageBox::question(this, tr("Confirm delete"), tr("Do you want to delete certificate '%1'?").arg(fileInfo.fileName()), QMessageBox::No, QMessageBox::Yes) == QMessageBox::Yes)
        {
            QFile file(fileInfo.filePath());
            if (!file.remove())
            {
                QMessageBox::critical(this, tr("Error"), tr("Cannot delete certificate '%1'").arg(fileInfo.fileName()));
            }
        }
    }
}

void PDFCertificateManagerDialog::onImportCertificateClicked()
{
    QString selectedFile = QFileDialog::getOpenFileName(this, tr("Import Certificate"), QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation), tr("Certificate file (*.pfx);;All files (*.*)"));

    if (selectedFile.isEmpty())
    {
        return;
    }

    QFile file(selectedFile);
    if (file.exists())
    {
        QString path = PDFCertificateManager::getCertificateDirectory();
        QString targetFile = QString("%1/%2").arg(path, QFileInfo(file).fileName());
        if (QFile::exists(targetFile))
        {
            QMessageBox::critical(this, tr("Error"), tr("Target file exists. Please rename the certificate file to import."));
        }
        else
        {
            if (file.copy(targetFile))
            {
                QMessageBox::information(this, tr("Import Certificate"), tr("Certificate '%1' was successfully imported.").arg(file.fileName()));
            }
            else
            {
                QMessageBox::critical(this, tr("Import Certificate"), tr("Error occured during certificate '%1' import.").arg(file.fileName()));
            }
        }
    }
}

}   // namespace pdf