/*
  Copyright 2010-2012 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 <iostream>
#include <QXmlInputSource>

#include "XMLImportEngine.hpp"

static XMLImportEngine xmlImportEngine;

XMLImportEngine::XMLImportEngine()
{
    KissCount::RegisterImportEngine(this);

    _shortExt = ".xml";
    _longExt = _("KissCount xml files (*.xml)");

    _sax.setContentHandler(this);
}

XMLImportEngine::~XMLImportEngine()
{
}

bool XMLImportEngine::HandleFile(const QString& path, User* user, Database* db, KissCount* kiss)
{
    bool res = false;
    QFile file(path);

    if (!ImportEngine::HandleFile(path, user, db, kiss)) return false;

    if (!file.open(QIODevice::ReadOnly))
    {
	std::cout << "Error can't open the file " << path.toStdString() << std::endl;
	return false;
    }

    try
    {
	res = _sax.parse(&file);
	LinkChilds();
    }
    catch (const char* s)
    {
	std::cout << "XMLImportEngine :: " << s << std::endl;
	res = false;
    }

    file.close();

    return res;
}

bool XMLImportEngine::startElement (const QString& namespaceURI, const QString& localName, const QString& qName, const QXmlAttributes& attrs)
{
    if (qName == "kisscount")
    {
	if (attrs.value("version") != "1")
	    throw "Unsupported version !";
    }

    else if (qName == "account")
	LoadAccount(attrs);

    else if (qName == "account_amount")
	LoadAccountAmount(attrs);

    else if (qName == "category")
	LoadCategory(attrs);

    else if (qName == "operation")
	LoadOperation(attrs);
    else
	std::cout << "Unknown element : '" << qName.toStdString() << "'" << std::endl;
    return true;
}

void XMLImportEngine::LoadAccount(const QXmlAttributes& attrs)
{
    int id;
    Account ac;
    static int unknownAccount = 0;

    ac.id = 0;

    ac.name = attrs.value("name");
    ac.id = id = attrs.value("id").toInt();
    ac.number = attrs.value("number");
    ac.blocked = (attrs.value("blocked") == "1");
    ac._virtual = (attrs.value("virtual") == "1");
    ac.hidden = (attrs.value("hidden") == "1");

    UNESCAPE_CHARS(ac.name);
    UNESCAPE_CHARS(ac.number);

    ac._default = false;
    ac.shared = false;
    ac.is_owner = true;

    if (ac.number.size())
    {
	try {
	    _accounts[ac.id] = _user->GetAccountIdFromAccountNumber(ac.number);
	    return;
	}
	catch (User::AccountNotFound)
	{
	}
    }

    if (ac.name.size())
    {
	try {
	    _accounts[ac.id] = _user->GetAccountId(ac.name);
	    return;
	}
	catch (User::AccountNotFound)
	{
	}
    }

    _accounts[id] = --unknownAccount;
    _unresolvedAccounts.push_back(ac);
}

void XMLImportEngine::LoadAccountAmount(const QXmlAttributes& attrs)
{
    AccountAmount accountAmount;
    double amount;
    
    accountAmount.account = attrs.value("account").toInt();
    accountAmount.month = attrs.value("month").toInt();
    accountAmount.year = attrs.value("year").toInt();
    amount = attrs.value("amount").toDouble();

    _accountAmounts[accountAmount] = amount;
}

void XMLImportEngine::LoadCategory(const QXmlAttributes& attrs)
{
    QString name;
    int id;
    long rgb;
    Category cat;
    static int unknownCategory = 0;

    cat.fix_cost = false;

    cat.name = name = attrs.value("name");
    cat.id = id = attrs.value("id").toInt();
    cat.parent = attrs.value("parent").toInt();
    cat.font = attrs.value("font");

    if (attrs.value("backcolor") != "")
    {
	rgb = attrs.value("backcolor").toInt(0, 16);
	cat.backcolor = QColor((rgb >> 16) & 0xFF, (rgb >> 8) & 0xFF, rgb & 0xFF);
    }
    else
	cat.backcolor = view::OWN_GREEN;

    if (attrs.value("forecolor") != "")
    {
	rgb = attrs.value("forecolor").toInt(0, 16);
	cat.forecolor = QColor((rgb >> 16) & 0xFF, (rgb >> 8) & 0xFF, rgb & 0xFF);
    }
    else
	cat.forecolor = Qt::black;

    cat.fix_cost = (attrs.value("fix_cost") == "1");

    UNESCAPE_CHARS(cat.name);

    int catId = _user->GetCategoryId(name);

    if (catId)
    {
	_categories[id] = catId;
	return;
    }

    _categories[id] = --unknownCategory;
    _unresolvedCategories.push_back(cat);
}

void XMLImportEngine::LoadOperation(const QXmlAttributes& attrs)
{
    Operation op;

    op.id = attrs.value("id").toInt();
    op.parent = attrs.value("parent").toInt();
    op.day = attrs.value("day").toInt();
    op.month = attrs.value("month").toInt();
    op.year = attrs.value("year").toInt();
    op.amount = attrs.value("amount").toDouble();
    op.description = attrs.value("description");
    op.category = attrs.value("category").toInt();
    op.category = (attrs.value("fix_cost") == "1");
    op.account = attrs.value("account").toInt();
    op.checked = (attrs.value("checked") == "1");
    op.transfert = attrs.value("transfert").toInt();
    op.formula = attrs.value("formula");
    op.meta = (attrs.value("meta") == "1");
    op._virtual = (attrs.value("virtual") == "1");

    UNESCAPE_CHARS(op.description);

    _operations.push_back(op);
    _descriptions[op.id] = op.description;

    MatchPattern(op.description, op);
}