#include "PgTrigger.h"
#include "PgClassContainer.h"
#include "PgDatabaseCatalog.h"
#include "SqlFormattingUtils.h"
#include <QStringBuilder>


QString PgTrigger::dropSql(const PgDatabaseCatalog &catalog)
{
	if (m_dropSql.isEmpty()) {
		auto&& fqtablename = genFQTableName(catalog, catalog.classes()->getByKey(relid));
		m_dropSql = "DROP TRIGGER " % quoteIdent(name)
			  % " ON " % fqtablename % ";";
	}
	return m_dropSql;
}

QString PgTrigger::createSql(const PgDatabaseCatalog &catalog)
{
	if (m_createSql.isEmpty()) {
		auto&& fqtablename = genFQTableName(catalog, catalog.classes()->getByKey(relid));
//		if (GetLanguage() == wxT("edbspl"))
//			sql += wxT("CREATE OR REPLACE TRIGGER ");
//		else if (GetConnection()->BackendMinimumVersion(8, 2) && GetIsConstraint())
		if (constraint != InvalidOid)
			m_createSql += "CREATE CONSTRAINT TRIGGER ";
		else
			m_createSql += "CREATE TRIGGER ";

		m_createSql += quoteIdent(name) + "\n  "
			   + typeFireWhen()
			   + " " + event();

		m_createSql += "\n  ON " + fqtablename;
		if (deferrable) {
			m_createSql += "\n  DEFERRABLE INITIALLY ";
			if (initdeferred)
				m_createSql += "DEFERRED";
			else
				m_createSql += "IMMEDIATE";
		}
		m_createSql += "\n  FOR EACH " + forEach();

//		if (GetConnection()->BackendMinimumVersion(8, 5)
//				&& !GetWhen().IsEmpty())
//			sql += wxT("\n  WHEN (") + GetWhen() + wxT(")");

//		if (GetLanguage() == wxT("edbspl"))
//		{
//			sql += wxT("\n") + GetSource();
//			if (!sql.Trim().EndsWith(wxT(";")))
//				sql = sql.Trim() + wxT(";");
//			sql += wxT("\n");
//		}
//		else
//		{
//			sql += wxT("\n  EXECUTE PROCEDURE ") + triggerFunction->GetQuotedFullIdentifier()
//				   + wxT("(") + GetArguments() + wxT(")")
//				   + wxT(";\n");
//		}

//		if (!GetEnabled())
//		{
//			sql += wxT("ALTER TABLE ") + GetQuotedFullTable() + wxT(" ")
//				   +  wxT("DISABLE TRIGGER ") + GetQuotedIdentifier() + wxT(";\n");
//		}

//		if (!GetComment().IsEmpty())
//			sql += wxT("COMMENT ON TRIGGER ") + GetQuotedIdentifier() + wxT(" ON ") + GetQuotedFullTable()
//				   +  wxT(" IS ") + qtDbString(GetComment()) + wxT(";\n");
	}

	return m_createSql;
}


QString PgTrigger::typeFireWhen() const
{
	QString when;

	if (type & TriggerTypeBefore)
		when = "BEFORE";
	else if (type & TriggerTypeInstead)
		when = "INSTEAD OF";
	else
		when = "AFTER";
	return when;
}


QString PgTrigger::eventAbbr() const
{
	QString event;
	if (type & TriggerTypeInsert)
		event += "I";
	if (type & TriggerTypeUpdate)
		event += "U";
	if (type & TriggerTypeDelete)
		event += "D";
	if (type & TriggerTypeTruncate)
		event += "T";
	return event;
}

QString PgTrigger::event() const
{
	QString event;
	if (type & TriggerTypeInsert)
		event += "INSERT ";
	if (type & TriggerTypeUpdate)
		event += "UPDATE ";
	if (type & TriggerTypeDelete)
		event += "DELETE ";
	if (type & TriggerTypeTruncate)
		event += "TRUNCATE";
	return event.trimmed();
}

QString PgTrigger::forEach() const
{
	if (isRow())
		return "ROW";
	else
		return "STATEMENT";
}