/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

#include <sal/config.h>

#include <com/sun/star/lang/IllegalArgumentException.hpp>
#include <com/sun/star/security/AccessControlException.hpp>
#include <com/sun/star/system/SystemShellExecute.hpp>
#include <com/sun/star/system/SystemShellExecuteException.hpp>
#include <com/sun/star/system/SystemShellExecuteFlags.hpp>
#include <com/sun/star/uno/Reference.hxx>
#include <com/sun/star/uno/RuntimeException.hpp>
#include <comphelper/processfactory.hxx>
#include <rtl/ustring.hxx>
#include <sfx2/sfxresid.hxx>
#include <tools/urlobj.hxx>
#include <vcl/svapp.hxx>
#include <vcl/weld.hxx>
#include <openuriexternally.hxx>
#include <comphelper/lok.hxx>
#include <LibreOfficeKit/LibreOfficeKitEnums.h>

#include <sfx2/viewsh.hxx>
#include <sfx2/strings.hrc>

namespace {

class URITools
{
private:
    Timer aOpenURITimer { "sfx2::openUriExternallyTimer" };
    OUString msURI;
    weld::Widget* mpDialogParent;
    bool mbHandleSystemShellExecuteException;
    DECL_LINK(onOpenURI, Timer*, void);

public:
    URITools(weld::Widget* pDialogParent)
        : mpDialogParent(pDialogParent)
        , mbHandleSystemShellExecuteException(false)
    {
    }
    void openURI(const OUString& sURI, bool bHandleSystemShellExecuteException);
};

}

void URITools::openURI(const OUString& sURI, bool bHandleSystemShellExecuteException)
{
    if (comphelper::LibreOfficeKit::isActive())
    {
        if (SfxViewShell* pViewShell = SfxViewShell::Current())
        {
            pViewShell->libreOfficeKitViewCallback(LOK_CALLBACK_HYPERLINK_CLICKED,
                                                   sURI.toUtf8().getStr());
        }
        delete this;
        return;
    }

    mbHandleSystemShellExecuteException = bHandleSystemShellExecuteException;
    msURI = sURI;

    // tdf#116305 Workaround: Use timer to bring browsers to the front
    aOpenURITimer.SetInvokeHandler(LINK(this, URITools, onOpenURI));
#ifdef _WIN32
    // 200ms seems to be the best compromise between responsiveness and success rate
    aOpenURITimer.SetTimeout(200);
#else
    aOpenURITimer.SetTimeout(0);
#endif
    aOpenURITimer.Start();
}

IMPL_LINK_NOARG(URITools, onOpenURI, Timer*, void)
{
    std::unique_ptr<URITools> guard(this);
    css::uno::Reference< css::system::XSystemShellExecute > exec(
        css::system::SystemShellExecute::create(comphelper::getProcessComponentContext()));
    for (sal_Int32 flags = css::system::SystemShellExecuteFlags::URIS_ONLY;;) {
        try {
            exec->execute(msURI, OUString(), flags);
        } catch (css::security::AccessControlException & e) {
            if (e.LackingPermission.hasValue() || flags == 0) {
                throw css::uno::RuntimeException(
                    "unexpected AccessControlException: " + e.Message);
            }
            SolarMutexGuard g;
            std::unique_ptr<weld::MessageDialog> eb(
                Application::CreateMessageDialog(
                    mpDialogParent, VclMessageType::Warning, VclButtonsType::OkCancel,
                    SfxResId(STR_DANGEROUS_TO_OPEN)));
            eb->set_primary_text(eb->get_primary_text().replaceFirst("$(ARG1)", INetURLObject::decode(msURI, INetURLObject::DecodeMechanism::Unambiguous)));
            if (eb->run() == RET_OK) {
                flags = 0;
                continue;
            }
        } catch (css::lang::IllegalArgumentException & e) {
            if (e.ArgumentPosition != 0) {
                throw css::uno::RuntimeException(
                    "unexpected IllegalArgumentException: " + e.Message);
            }
            SolarMutexGuard g;
            std::unique_ptr<weld::MessageDialog> eb(Application::CreateMessageDialog(mpDialogParent,
                                                                     VclMessageType::Warning, VclButtonsType::Ok,
                                                                     SfxResId(STR_NO_ABS_URI_REF)));
            eb->set_primary_text(eb->get_primary_text().replaceFirst("$(ARG1)", INetURLObject::decode(msURI, INetURLObject::DecodeMechanism::Unambiguous)));
            eb->run();
        } catch (css::system::SystemShellExecuteException & e) {
            if (!mbHandleSystemShellExecuteException) {
                throw;
            }
            SolarMutexGuard g;
            std::unique_ptr<weld::MessageDialog> eb(Application::CreateMessageDialog(mpDialogParent,
                                                                     VclMessageType::Warning, VclButtonsType::Ok,
                                                                     SfxResId(STR_NO_WEBBROWSER_FOUND)));
            eb->set_primary_text(
                eb->get_primary_text().replaceFirst("$(ARG1)", msURI)
                .replaceFirst("$(ARG2)", OUString::number(e.PosixError))
                .replaceFirst("$(ARG3)", e.Message));
                //TODO: avoid subsequent replaceFirst acting on previous replacement
            eb->run();
        }
        break;
    }
}

void sfx2::openUriExternally(const OUString& sURI, bool bHandleSystemShellExecuteException, weld::Widget* pDialogParent)
{
    URITools* uriTools = new URITools(pDialogParent);
    uriTools->openURI(sURI, bHandleSystemShellExecuteException);
}

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