/*
  Copyright 2010-2011 Grégory Soutadé

  This file is part of KissCount.

  KissCount is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  KissCount is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with KissCount.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <QMessageBox>

#include "ImportPanel.hpp"
#include "grid/ChoiceDelegate.hpp"

ImportPanel::ImportPanel(KissCount* kiss, wxUI *parent) : KissPanel(kiss, parent)
{
    QVBoxLayout *vbox = new QVBoxLayout;
    QVBoxLayout *vbox2 = new QVBoxLayout;
    QHBoxLayout *hbox = new QHBoxLayout;
    _hbox = new QHBoxLayout;
    QPushButton* buttonOpen;
    QGroupBox* staticAccount = new QGroupBox(_("Unresolved accounts"));
    QGroupBox* staticCategory = new QGroupBox(_("Unresolved categories"));

    setLayout(vbox);

    _fileTxt = new QLineEdit;
    buttonOpen = new QPushButton("...");

    connect(buttonOpen, SIGNAL(clicked()), this, SLOT(OnFile()));
    connect(_fileTxt, SIGNAL(returnPressed()), this, SLOT(OnFileEnter()));

    _buttonLoadOperations = new QPushButton(_("Load operations"));
    _buttonLoadOperations->setEnabled(false);
    connect(_buttonLoadOperations, SIGNAL(clicked()), this, SLOT(OnLoadOperations()));

    _buttonIntegrate = new QPushButton(_("Integrate operations"));
    _buttonIntegrate->setEnabled(false);
    connect(_buttonIntegrate, SIGNAL(clicked()), this, SLOT(OnIntegrate()));

    _checkSaveImportPatterns = new QCheckBox(_("Save import patterns"));

    hbox->addWidget(_fileTxt);
    hbox->addWidget(buttonOpen);
    hbox->addWidget(_buttonLoadOperations);
    hbox->addWidget(_buttonIntegrate);
    hbox->addWidget(_checkSaveImportPatterns);

    vbox->addLayout(hbox);
    
    _accountsGrid = new QTableWidget(0, 3);
    _accountsGrid->verticalHeader()->setHidden(true);
    QStringList labels;
    labels << _("File account") << _("Account name") << _("Internal account");
    _accountsGrid->setHorizontalHeaderLabels(labels);
    _accountsGrid->resizeColumnsToContents();

    _categoriesGrid = new QTableWidget(0, 3);
    _categoriesGrid->verticalHeader()->setHidden(true);
    labels.clear();
    labels << _("File category") << _("Category name") << _("Internal category");
    _categoriesGrid->setHorizontalHeaderLabels(labels);
    _categoriesGrid->resizeColumnsToContents();

    {
	QVBoxLayout *vbox = new QVBoxLayout;
	vbox->addWidget(_accountsGrid);
	staticAccount->setLayout(vbox);
    }

    vbox2->addWidget(staticAccount);

    {
	QVBoxLayout *vbox = new QVBoxLayout;
	vbox->addWidget(_categoriesGrid);
	staticCategory->setLayout(vbox);
    }

    vbox2->addWidget(staticCategory);

    _operationsGrid = new GridAccount(kiss, this, false, false, false);
    connect(_operationsGrid, SIGNAL(cellChanged(int, int)), this, SLOT(OnOperationModified(int, int)));

    _hbox->addLayout(vbox2);
    _hbox->addWidget(_operationsGrid);

    vbox->addLayout(_hbox);

    layout();
}

KissPanel* ImportPanel::CreatePanel()
{
    return new ImportPanel(_kiss, _wxUI);
}

QPushButton* ImportPanel::GetButton()
{
    if (!_KissButton)
    {
	_KissButton = new QPushButton(QIcon(IMPORT_ICON), "", this);
	_KissButton->setFixedSize(128, 128);
	_KissButton->setIconSize(QSize(128, 128));
    }

    return _KissButton;
}

QString ImportPanel::GetToolTip()
{
    return _("Import");
}

void ImportPanel::OnShow()
{
    _wxUI->setWindowTitle(_("KissCount - Import"));
}

void ImportPanel::OnFile()
{
    QString path;

    path = QFileDialog::getOpenFileName(0, _("Choose a database to open"), "", _kiss->GetImportEngineExtensions());

    if (!path.size())
	return;

    _fileTxt->setText(path);

    ProcessFile();
}

void ImportPanel::OnFileEnter()
{
    ProcessFile();
}

void ImportPanel::ProcessFile()
{
    User* user = _kiss->GetUser();
    int i;
    QString* userAccounts;
    std::map<int, int> resolvedAccounts;
    QString* userCategories;
    std::map<int, int> resolvedCategories;
    QTableWidgetItem* item;

    QString path = _fileTxt->text();

    _buttonLoadOperations->setEnabled(false);
    _buttonIntegrate->setEnabled(false);
    _accountsGrid->setRowCount(0);
    _categoriesGrid->setRowCount(0);
    _operationsGrid->setRowCount(0);

    _importEngine = _kiss->GetImportEngine(path);

    if (!_importEngine) 
    {
        QMessageBox::critical(0, _("Error"), _("Any engine can process this file !"));	
    	return ;
    }

    _importEngine->ParseFile(_unresolvedAccounts, _unresolvedCategories);

    if (_unresolvedAccounts.size())
    {
    	int nb_accounts = user->GetAccountsNumber();
    	userAccounts = new QString[nb_accounts+1];

    	userAccounts[0] = _("Create one");

    	for(i=0; i<nb_accounts; i++)
    	    userAccounts[i+1] = user->_accounts[i].name;

	ChoiceDelegate* accountEditor = new ChoiceDelegate(this, userAccounts, nb_accounts+1);
	_accountsGrid->setItemDelegateForColumn(2, accountEditor);

    	_buttonLoadOperations->setEnabled(true);

    	_accountsGrid->setRowCount(_unresolvedAccounts.size());

    	for (i=0; i<(int)_unresolvedAccounts.size(); i++)
    	{
	    item = new QTableWidgetItem(_unresolvedAccounts[i].number);
	    item->setFlags(item->flags() & ~Qt::ItemIsEditable);
	    _accountsGrid->setItem(i, 0, item);
	    _accountsGrid->setItem(i, 1, new QTableWidgetItem(_unresolvedAccounts[i].name));
	    _accountsGrid->setItem(i, 2, new QTableWidgetItem(userAccounts[0]));
    	}
	
    	_accountsGrid->resizeColumnsToContents();
    	_accountsGrid->layout();
    }

    if (_unresolvedCategories.size())
    {
    	int nb_categories = user->GetCategoriesNumber();
    	userCategories = new QString[nb_categories+1];

    	userCategories[0] = _("Create one");

    	for(i=0; i<nb_categories; i++)
    	    userCategories[i+1] = user->_categories[i].name;

	ChoiceDelegate* categoryEditor = new ChoiceDelegate(this, userCategories, nb_categories+1);
	_categoriesGrid->setItemDelegateForColumn(2, categoryEditor);

    	_buttonLoadOperations->setEnabled(true);

    	_categoriesGrid->setRowCount(_unresolvedCategories.size());

    	for (i=0; i<(int)_unresolvedCategories.size(); i++)
    	{
	    item = new QTableWidgetItem(_unresolvedCategories[i].name);
	    item->setFlags(item->flags() & ~Qt::ItemIsEditable);
	    _categoriesGrid->setItem(i, 0, item);
	    _categoriesGrid->setItem(i, 1, new QTableWidgetItem(""));
	    _categoriesGrid->setItem(i, 2, new QTableWidgetItem(userCategories[0]));
    	}
	
    	_categoriesGrid->resizeColumnsToContents();
    	_categoriesGrid->layout();
    }

    if (!_unresolvedAccounts.size() && !_unresolvedCategories.size())
    {
    	OnLoadOperations();
    }
    layout();
}

void ImportPanel::OnLoadOperations()
{
    int i, nbAccounts=0, nbCategories=0;
    User* user = _kiss->GetUser();
    Account account;
    Category category;
    std::map<int, int> accounts;
    std::map<int, int> categories;
    int oldid;

    for(i=0; i<_accountsGrid->rowCount(); i++)
    {
    	if (_accountsGrid->item(i, 2)->text() == _("Create one")) 
    	    nbAccounts++;
    	else
	{
	    oldid = _unresolvedAccounts[i].id;
    	    accounts[oldid] = user->GetAccountId(_accountsGrid->item(i, 2)->text());
	}
    }

    for(i=0; i<_categoriesGrid->rowCount(); i++)
    {
    	if (_categoriesGrid->item(i, 2)->text() == _("Create one")) 
    	    nbCategories++;
    	else
	{
	    oldid = _unresolvedCategories[i].id;
    	    categories[oldid] = user->GetCategoryId(_categoriesGrid->item(i, 2)->text());;
	}
    }

    if (nbAccounts || nbCategories)
    {
    	QString message, v;
	
    	if (nbAccounts)
    	{
    	    message += v.sprintf(_("%d accounts").toStdString().c_str(), nbAccounts);
    	    if (nbCategories) message += _(" and ");
    	}

    	if (nbCategories)
    	    message += v.sprintf(_("%d categories").toStdString().c_str(), nbCategories);

    	message += _(" will be created, is it ok ?");

	if (QMessageBox::question(0, "KissCount", message, QMessageBox::Yes|QMessageBox::No) == QMessageBox::No)
        return;

    	for(i=0; i<_accountsGrid->rowCount(); i++)
    	{
    	    if (_accountsGrid->item(i, 2)->text() == _("Create one"))
    	    {
    		account = _unresolvedAccounts[i] ;
    		if (_accountsGrid->item(i, 1)->text().length())
    		    account.name = _accountsGrid->item(i, 1)->text();
    		else
    		    account.name = _accountsGrid->item(i, 0)->text();
		if (account.name.length() == 0)
		{
		    QMessageBox::critical(0, _("Error"), _("Account ") + QString::number(i) + _(" must have a name"));	
		    return;
		}
    		account.number = _accountsGrid->item(i, 0)->text();

    		oldid = account.id;
    		accounts[oldid] = account.id = _kiss->AddAccount(account);
    	    }
    	}
	
    	_accountsGrid->setRowCount(0);

    	for(i=0; i<_categoriesGrid->rowCount(); i++)
    	{
    	    if (_categoriesGrid->item(i, 2)->text() == _("Create one"))
    	    {
    		category = _unresolvedCategories[i] ;
    		if (_categoriesGrid->item(i, 1)->text().length())
    		    category.name = _categoriesGrid->item(i, 1)->text();
    		else
    		    category.name = _categoriesGrid->item(i, 0)->text();

		if (category.name.length() == 0)
		{
		    QMessageBox::critical(0, _("Error"), _("Category ") + QString::number(i) + _(" must have a name"));	
		    return;
		}
		
    		oldid = category.id;
    		categories[oldid] = category.id = _kiss->AddCategory(category);
    	    }
    	}
	
    	_categoriesGrid->setRowCount(0);

    	_wxUI->NeedReload();
    }

    _operations = _importEngine->GetOperations(accounts, categories);

    if (_operations->size())
    {
    	_hbox->removeWidget(_operationsGrid);
    	delete _operationsGrid;
    	_operationsGrid = new GridAccount(_kiss, this, false, false, false);
    	_hbox->addWidget(_operationsGrid);

    	_operationsGrid->LoadOperations(_operations, 0, 0);
    	_buttonIntegrate->setEnabled(true);

    	_buttonLoadOperations->setEnabled(false);

    	layout();
    }
    else
    {
        QMessageBox::information(0, "KissCount", _("No operation found into this file"));
    }
}

void ImportPanel::OnIntegrate()
{
    int i;
    std::map<int, int> mapid;
    int oldid, account;
    bool update;
    std::map<AccountAmount, int, AccountAmount> accountAmounts;
    std::map<AccountAmount, int, AccountAmount>::iterator it;
    int amount;

    if (!_operations->size()) return;

    if (QMessageBox::question(0, "KissCount", _("Are you sure want to integrate these operations ?"), QMessageBox::Yes|QMessageBox::No) == QMessageBox::No)
        return;

    _buttonIntegrate->setEnabled(false);

    _kiss->setOverrideCursor(QCursor(Qt::WaitCursor));
    _wxUI->setEnabled(false);
    _wxUI->repaint();

    for(i=0; i<(int)_operations->size(); i++)
    {
    	oldid = (*_operations)[i].id;
    	_kiss->AddOperation((*_operations)[i], false);
    	mapid[oldid] = (*_operations)[i].id;
    }

    for(i=0; i<(int)_operations->size(); i++)
    {
    	update = false;

    	if ((*_operations)[i].parent)
    	{
    	    (*_operations)[i].parent = mapid[(*_operations)[i].parent];
    	    update = true;
    	}

    	if ((*_operations)[i].transfert)
    	{
    	    (*_operations)[i].transfert = mapid[(*_operations)[i].transfert];
    	    update = true;
    	}

    	if (update)
    	    _kiss->UpdateOperation((*_operations)[i], false);
    }

    accountAmounts = _importEngine->GetAccountAmounts();

    for(it=accountAmounts.begin(); it!=accountAmounts.end(); it++)
    {
    	account = it->first.account;

    	amount = _kiss->GetAccountAmount(account, it->first.month, it->first.year);
	
    	if (!amount)
    	    _kiss->SetAccountAmount(account, it->first.month, it->first.year, it->second);
    }

    if (_checkSaveImportPatterns->checkState() == Qt::Checked)
    	_kiss->UpdateImportPattern();

    _operations->clear();
    _operationsGrid->ClearGrid();

    _wxUI->setEnabled(true);
    _kiss->setOverrideCursor(QCursor(Qt::ArrowCursor));

    QMessageBox::information(0, "KissCount", _("Operations successfully imported"));

    _wxUI->NeedReload();
}

void ImportPanel::OnOperationModified(int row, int col)
{
    static bool update = false;

    if (col != GridAccount::DESCRIPTION && 
	col != GridAccount::CATEGORY && 
	col != GridAccount::ACCOUNT) 
	return ;

    if (update) return;

    update = true;

    _operationsGrid->ClearGrid();

    if (_importEngine->UpdatePattern(row-1) > 1)
    	_operationsGrid->LoadOperations(_operations, 0, 0);

    layout();

    update = false;
}