#include "TablesTableModel.h"
#include "PgDatabaseCatalog.h"
#include "PgClass.h"
#include "PgClassContainer.h"
#include "PgNamespace.h"
#include "PgNamespaceContainer.h"
#include "Pgsql_declare.h"
#include <QBrush>

TablesTableModel::TablesTableModel(QObject *parent)
	: BaseTableModel(parent)
{

}

void TablesTableModel::setCatalog(std::shared_ptr<const PgDatabaseCatalog> cat)
{
	beginResetModel();
	m_catalog = cat;

	// Later afscheiden naar filter functie
	auto classes = cat->classes();

	// How many?
	int n = 0;
	for (const auto &e : *classes)
		if (e.kind == RelKind::Table && !e.system_namespace) ++n;

	m_tables.clear();
	m_tables.reserve(n); // reserve space
	for (const auto &e : *classes) {
		if (e.kind == RelKind::Table && !e.system_namespace) {
			m_tables.push_back(e);
		}
	}

	doSort(1);
	endResetModel();
}

void TablesTableModel::setSortOrder(int so)
{
	beginResetModel();
	doSort(so);
	endResetModel();
}

namespace {

	inline bool compareByName(PgClass l, PgClass r)
	{
		return l.name < r.name
				|| (l.name == r.name && l.relnamespace_name < r.relnamespace_name);
	}

	inline bool compareBySchema(PgClass l, PgClass r)
	{
		return l.relnamespace_name < r.relnamespace_name
							|| (l.relnamespace_name == r.relnamespace_name && l.name < r.name);
	}

}

void TablesTableModel::sort(int column, Qt::SortOrder order)
{
	if (column == NameCol) {
		if (order == Qt::AscendingOrder)
			std::sort(m_tables.begin(), m_tables.end(), compareByName);
		else
			std::sort(m_tables.begin(), m_tables.end(), [] (auto l, auto r) { return !compareByName(l, r); });
	}
	else if (column == NamespaceCol) {
		if (order == Qt::AscendingOrder)
			std::sort(m_tables.begin(), m_tables.end(), compareBySchema);
		else
			std::sort(m_tables.begin(), m_tables.end(), [] (auto l, auto r) { return !compareBySchema(l, r); });
	}

	emit layoutChanged();
}

void TablesTableModel::doSort(int )
{
//	if (so == 1)
//		std::sort(m_tables.begin(), m_tables.end(),
//				  [] (auto l, auto r) -> bool { return l.relnamespace_name < r.relnamespace_name
//						|| (l.relnamespace_name == r.relnamespace_name && l.name < r.name); });
//	else
//		std::sort(m_tables.begin(), m_tables.end(),
//				  [] (auto l, auto r) -> bool { return l.name < r.name; });
}


QVariant TablesTableModel::headerData(int section, Qt::Orientation orientation, int role) const
{
	QVariant v;
	if (orientation == Qt::Horizontal) {
		if (role == Qt::DisplayRole) {
			switch (section) {
			case NameCol:
				v = tr("Name");
				break;
			case NamespaceCol:
				v = tr("Schema");
				break;
			case OwnerCol:
				v = tr("Owner");
				break;
			case TablespaceCol:
				v = tr("Tablespace");
				break;
			case OptionsCol:
				v = tr("Options");
				break;
//			case AclCol:
//				v = tr("ACL");
//				break;
			}
		}
	}
	return v;
}

// Basic functionality:
int TablesTableModel::rowCount(const QModelIndex &) const
{
	return m_tables.size();
}

int TablesTableModel::columnCount(const QModelIndex &) const
{
	return colCount;
}

Oid TablesTableModel::getType(int column) const
{
	Oid oid;
	switch (column) {
	case TablespaceCol:
	case OwnerCol:
	case NameCol:
	case NamespaceCol:
	case OptionsCol:
//	case AclCol:
	default:
		oid = Pgsql::VARCHAROID;
	}
	return oid;
}

QVariant TablesTableModel::getData(const QModelIndex &index) const
{
	QVariant v;
	const auto &t = m_tables[index.row()];
	switch (index.column()) {
	case NameCol:
		v = t.name; //formatTableName(t);
		break;
	case NamespaceCol:
		v = getNamespaceDisplayString(*m_catalog, t.relnamespace);
		break;
	case OwnerCol:
		v = getRoleDisplayString(*m_catalog, t.owner);
		break;
	case TablespaceCol:
		v = getTablespaceDisplayString(*m_catalog, t.tablespace);
		break;
	case OptionsCol:
		v = t.options;
		break;
//	case AclCol:
//		v = t.acl;
//		break;
	}

	return v;
}

PgClass TablesTableModel::getTable(int row) const
{
	return m_tables[row];
}

Oid TablesTableModel::getTableOid(int row) const
{
	return m_tables[row].oid;
}

QString TablesTableModel::formatTableName(const PgClass &cls) const
{
	const char * format = "%2 (%1)";
	QString ns_name = getNamespaceDisplayString(*m_catalog, cls.relnamespace);
	return QString(format).arg(ns_name).arg(cls.name);
}

QVariant TablesTableModel::data(const QModelIndex &index, int role) const
{

	if (role == Qt::ForegroundRole) {

		const auto &t = m_tables[index.row()];
		auto ns = m_catalog->namespaces()->getByKey(t.relnamespace);
		if (ns.isSystemCatalog()) {
			switch (index.column()) {
			case NameCol:
			case NamespaceCol:
				return QBrush(Qt::blue);
				break;
			}
		}
	}
	return BaseTableModel::data(index, role);
}