/*
  Copyright (c) 2004-2016 The FlameRobin Development Team

  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.
*/

// For compilers that support precompilation, includes "wx/wx.h".
#include "wx/wxprec.h"

// for all others, include the necessary headers (this file is usually all you
// need because it includes almost all "standard" wxWindows headers
#ifndef WX_PRECOMP
    #include "wx/wx.h"
#endif

#include <wx/datetime.h>
#include <wx/filename.h>

#include <algorithm>

#include <ibpp.h>

#include "core/StringUtils.h"
#include "config/Config.h"
#include "gui/BackupFrame.h"
#include "gui/controls/DndTextControls.h"
#include "gui/controls/LogTextControl.h"
#include "gui/StyleGuide.h"
#include "gui/UsernamePasswordDialog.h"
#include "metadata/database.h"
#include "metadata/server.h"

// worker thread class to perform database backup
class BackupThread: public wxThread {
public:
    BackupThread(BackupFrame* frame, wxString server, wxString username,
        wxString password, wxString dbfilename, wxString bkfilename,
        IBPP::BRF flags);

    virtual void* Entry();
    virtual void OnExit();
private:
    BackupFrame* frameM;
    wxString serverM;
    wxString usernameM;
    wxString passwordM;
    wxString dbfileM;
    wxString bkfileM;
    IBPP::BRF brfM;
    void logError(wxString& msg);
    void logImportant(wxString& msg);
    void logProgress(wxString& msg);
};

BackupThread::BackupThread(BackupFrame* frame, wxString server,
        wxString username, wxString password, wxString dbfilename,
        wxString bkfilename, IBPP::BRF flags)
    : wxThread()
{
    frameM = frame;
    serverM = server;
    usernameM = username;
    passwordM = password;
    dbfileM = dbfilename;
    bkfileM = bkfilename;
    // always use verbose flag
    brfM = (IBPP::BRF)((int)flags | (int)IBPP::brVerbose);
}

void* BackupThread::Entry()
{
    wxDateTime now;
    wxString msg;

    try
    {
        msg.Printf(_("Connecting to server %s..."), serverM.c_str());
        logImportant(msg);
        IBPP::Service svc = IBPP::ServiceFactory(wx2std(serverM),
            wx2std(usernameM), wx2std(passwordM));
        svc->Connect();

        now = wxDateTime::Now();
        msg.Printf(_("Database backup started %s"), now.FormatTime().c_str());
        logImportant(msg);
        svc->StartBackup(wx2std(dbfileM), wx2std(bkfileM), brfM);
        while (true)
        {
            if (TestDestroy())
            {
                now = wxDateTime::Now();
                msg.Printf(_("Database backup canceled %s"),
                    now.FormatTime().c_str());
                logImportant(msg);
                break;
            }
            const char* c = svc->WaitMsg();
            if (c == 0)
            {
                now = wxDateTime::Now();
                msg.Printf(_("Database backup finished %s"),
                    now.FormatTime().c_str());
                logImportant(msg);
                break;
            }
            msg = c;
            logProgress(msg);
        }
        svc->Disconnect();
    }
    catch (IBPP::Exception& e)
    {
        now = wxDateTime::Now();
        msg.Printf(_("Database backup canceled %s due to IBPP exception:\n\n"),
            now.FormatTime().c_str());
        msg += e.what();
        logError(msg);
    }
    catch (...)
    {
        now = wxDateTime::Now();
        msg.Printf(_("Database backup canceled %s due to exception"),
            now.FormatTime().c_str());
        logError(msg);
    }
    return 0;
}

void BackupThread::OnExit()
{
    if (frameM != 0)
    {
        wxCommandEvent event(wxEVT_COMMAND_MENU_SELECTED,
            BackupRestoreBaseFrame::ID_thread_finished);
        wxPostEvent(frameM, event);
    }
}

void BackupThread::logError(wxString& msg)
{
    if (frameM != 0)
        frameM->threadOutputMsg(msg, BackupRestoreBaseFrame::error_message);
}

void BackupThread::logImportant(wxString& msg)
{
    if (frameM != 0)
        frameM->threadOutputMsg(msg, BackupRestoreBaseFrame::important_message);
}

void BackupThread::logProgress(wxString& msg)
{
    if (frameM != 0)
        frameM->threadOutputMsg(msg, BackupRestoreBaseFrame::progress_message);
}

BackupFrame::BackupFrame(wxWindow* parent, DatabasePtr db)
    : BackupRestoreBaseFrame(parent, db)
{
    setIdString(this, getFrameId(db));

    wxString databaseName(db->getName_());
    wxString serverName(db->getServer()->getName_());
    SetTitle(wxString::Format(_("Backup Database \"%s:%s\""),
        serverName.c_str(), databaseName.c_str()));

    createControls();
    layoutControls();
    updateControls();

    text_ctrl_filename->SetFocus();
}

//! implementation details
void BackupFrame::createControls()
{
    panel_controls = new wxPanel(this, wxID_ANY, wxDefaultPosition,
        wxDefaultSize, wxTAB_TRAVERSAL | wxCLIP_CHILDREN);
    label_filename = new wxStaticText(panel_controls, wxID_ANY,
        _("Backup file:"));
    text_ctrl_filename = new FileTextControl(panel_controls,
        ID_text_ctrl_filename, wxEmptyString);
    button_browse = new wxButton(panel_controls, ID_button_browse, _("..."),
        wxDefaultPosition, wxDefaultSize, wxBU_EXACTFIT);

    checkbox_checksum = new wxCheckBox(panel_controls, wxID_ANY,
        _("Ignore checksums"));
    checkbox_limbo = new wxCheckBox(panel_controls, wxID_ANY,
        _("Ignore limbo transactions"));
    checkbox_transport = new wxCheckBox(panel_controls, wxID_ANY,
        _("Use non-transportable format"));
    checkbox_metadata = new wxCheckBox(panel_controls, wxID_ANY,
        _("Only backup metadata"));
    checkbox_garbage = new wxCheckBox(panel_controls, wxID_ANY,
        _("Don't perform garbage collection"));
    checkbox_extern = new wxCheckBox(panel_controls, wxID_ANY,
        _("Convert external tables"));

    checkbox_showlog = new wxCheckBox(panel_controls, ID_checkbox_showlog,
        _("Show complete log"));
    button_start = new wxButton(panel_controls, ID_button_start,
        _("&Start Backup"));

    text_ctrl_log = new LogTextControl(this, ID_text_ctrl_log);
}

void BackupFrame::layoutControls()
{
    int wh = text_ctrl_filename->GetMinHeight();
    button_browse->SetSize(wh, wh);

    wxBoxSizer* sizerFilename = new wxBoxSizer(wxHORIZONTAL);
    sizerFilename->Add(label_filename, 0, wxALIGN_CENTER_VERTICAL);
    sizerFilename->Add(styleguide().getControlLabelMargin(), 0);
    sizerFilename->Add(text_ctrl_filename, 1, wxALIGN_CENTER_VERTICAL);
    sizerFilename->Add(styleguide().getBrowseButtonMargin(), 0);
    sizerFilename->Add(button_browse, 0, wxALIGN_CENTER_VERTICAL);

    wxGridSizer* sizerChecks = new wxGridSizer(3, 2,
        styleguide().getCheckboxSpacing(),
        styleguide().getUnrelatedControlMargin(wxHORIZONTAL));
    sizerChecks->Add(checkbox_checksum, 0, wxEXPAND);
    sizerChecks->Add(checkbox_metadata, 0, wxEXPAND);
    sizerChecks->Add(checkbox_limbo, 0, wxEXPAND);
    sizerChecks->Add(checkbox_garbage, 0, wxEXPAND);
    sizerChecks->Add(checkbox_transport, 0, wxEXPAND);
    sizerChecks->Add(checkbox_extern, 0, wxEXPAND);

    wxBoxSizer* sizerButtons = new wxBoxSizer(wxHORIZONTAL);
    sizerButtons->Add(checkbox_showlog, 0, wxALIGN_CENTER_VERTICAL);
    sizerButtons->Add(0, 0, 1, wxEXPAND);
    sizerButtons->Add(button_start);

    wxBoxSizer* sizerPanelV = new wxBoxSizer(wxVERTICAL);
    sizerPanelV->Add(0, styleguide().getFrameMargin(wxTOP));
    sizerPanelV->Add(sizerFilename, 0, wxEXPAND);
    sizerPanelV->Add(0, styleguide().getRelatedControlMargin(wxVERTICAL));
    sizerPanelV->Add(sizerChecks);
    sizerPanelV->Add(0, styleguide().getUnrelatedControlMargin(wxVERTICAL));
    sizerPanelV->Add(sizerButtons, 0, wxEXPAND);
    sizerPanelV->Add(0, styleguide().getRelatedControlMargin(wxVERTICAL));
    wxBoxSizer* sizerPanelH = new wxBoxSizer(wxHORIZONTAL);
    sizerPanelH->Add(styleguide().getFrameMargin(wxLEFT), 0);
    sizerPanelH->Add(sizerPanelV, 1, wxEXPAND);
    sizerPanelH->Add(styleguide().getFrameMargin(wxRIGHT), 0);
    panel_controls->SetSizerAndFit(sizerPanelH);

    wxBoxSizer* sizerMain = new wxBoxSizer(wxVERTICAL);
    sizerMain->Add(panel_controls, 0, wxEXPAND);
    sizerMain->Add(text_ctrl_log, 1, wxEXPAND);

    // show at least 3 lines of text since it is default size too
    sizerMain->SetItemMinSize(text_ctrl_log,
        -1, 3 * text_ctrl_filename->GetSize().GetHeight());
    SetSizerAndFit(sizerMain);
}

void BackupFrame::updateControls()
{
    bool running = getThreadRunning();
    button_browse->Enable(!running);
    text_ctrl_filename->Enable(!running);
    checkbox_checksum->Enable(!running);
    checkbox_limbo->Enable(!running);
    checkbox_metadata->Enable(!running);
    checkbox_garbage->Enable(!running);
    checkbox_transport->Enable(!running);
    checkbox_extern->Enable(!running);
    button_start->Enable(!running && !text_ctrl_filename->GetValue().empty());
}

void BackupFrame::doReadConfigSettings(const wxString& prefix)
{
    BackupRestoreBaseFrame::doReadConfigSettings(prefix);
    wxArrayString flags;
    config().getValue(prefix + Config::pathSeparator + "options", flags);
    if (!flags.empty())
    {
        checkbox_checksum->SetValue(
            flags.end() != std::find(flags.begin(), flags.end(), "ignore_checksums"));
        checkbox_limbo->SetValue(
            flags.end() != std::find(flags.begin(), flags.end(), "ignore_limbo"));
        checkbox_metadata->SetValue(
            flags.end() != std::find(flags.begin(), flags.end(), "metadata_only"));
        checkbox_garbage->SetValue(
            flags.end() != std::find(flags.begin(), flags.end(), "no_garbage_collect"));
        checkbox_transport->SetValue(
            flags.end() != std::find(flags.begin(), flags.end(), "no_transportable"));
        checkbox_extern->SetValue(
            flags.end() != std::find(flags.begin(), flags.end(), "external_tables"));
    }
    updateControls();
}

void BackupFrame::doWriteConfigSettings(const wxString& prefix) const
{
    BackupRestoreBaseFrame::doWriteConfigSettings(prefix);
    wxArrayString flags;
    if (checkbox_checksum->IsChecked())
        flags.push_back("ignore_checksums");
    if (checkbox_limbo->IsChecked())
        flags.push_back("ignore_limbo");
    if (checkbox_metadata->IsChecked())
        flags.push_back("metadata_only");
    if (checkbox_garbage->IsChecked())
        flags.push_back("no_garbage_collect");
    if (checkbox_transport->IsChecked())
        flags.push_back("no_transportable");
    if (checkbox_extern->IsChecked())
        flags.push_back("external_tables");
    config().setValue(prefix + Config::pathSeparator + "options", flags);
}

const wxString BackupFrame::getName() const
{
    return "BackupFrame";
}

/*static*/
wxString BackupFrame::getFrameId(DatabasePtr db)
{
    if (db)
        return wxString("BackupFrame/" + db->getItemPath());
    else
        return wxEmptyString;
}

BackupFrame* BackupFrame::findFrameFor(DatabasePtr db)
{
    BaseFrame* bf = frameFromIdString(getFrameId(db));
    if (!bf)
        return 0;
    return dynamic_cast<BackupFrame*>(bf);
}

//! event handlers
BEGIN_EVENT_TABLE(BackupFrame, BackupRestoreBaseFrame)
    EVT_BUTTON(BackupRestoreBaseFrame::ID_button_browse, BackupFrame::OnBrowseButtonClick)
    EVT_BUTTON(BackupRestoreBaseFrame::ID_button_start, BackupFrame::OnStartButtonClick)
END_EVENT_TABLE()

void BackupFrame::OnBrowseButtonClick(wxCommandEvent& WXUNUSED(event))
{
    wxFileName origName(text_ctrl_filename->GetValue());
    wxString filename = ::wxFileSelector(_("Select Backup File"),
        origName.GetPath(), origName.GetFullName(), "*.fbk",
        _("Backup file (*.fbk)|*.fbk|All files (*.*)|*.*"),
        wxFD_SAVE | wxFD_OVERWRITE_PROMPT, this);
    if (!filename.empty())
        text_ctrl_filename->SetValue(filename);
}

void BackupFrame::OnStartButtonClick(wxCommandEvent& WXUNUSED(event))
{
    verboseMsgsM = checkbox_showlog->IsChecked();
    clearLog();

    DatabasePtr database = getDatabase();
    wxCHECK_RET(database,
        "Cannot backup unassigned database");
    ServerPtr server = database->getServer();
    wxCHECK_RET(server,
        "Cannot backup database without assigned server");

    wxString username;
    wxString password;
    if (!getConnectionCredentials(this, database, username, password))
        return;

    int flags = (int)IBPP::brVerbose; // this will be ORed in anyway
    if (checkbox_checksum->IsChecked())
        flags |= (int)IBPP::brIgnoreChecksums;
    if (checkbox_limbo->IsChecked())
        flags |= (int)IBPP::brIgnoreLimbo;
    if (checkbox_metadata->IsChecked())
        flags |= (int)IBPP::brMetadataOnly;
    if (checkbox_garbage->IsChecked())
        flags |= (int)IBPP::brNoGarbageCollect;
    if (checkbox_transport->IsChecked())
        flags |= (int)IBPP::brNonTransportable;
    if (checkbox_extern->IsChecked())
        flags |= (int)IBPP::brConvertExtTables;

    startThread(std::make_unique<BackupThread>(this,
        server->getConnectionString(), username, password,
        database->getPath(), text_ctrl_filename->GetValue(),
        (IBPP::BRF)flags));
    updateControls();
}

