#include "PgClass.h"
#include "PgAttributeContainer.h"
#include "PgClassContainer.h"
#include "PgDatabaseCatalog.h"
#include "PgConstraintContainer.h"
#include "PgInheritsContainer.h"
#include <QStringBuilder>
#include "SqlFormattingUtils.h"



void operator<<(RelPersistence &s, const Pgsql::Value &v)
{
	//s = static_cast<T>(v);
	const char *c = v.c_str();
	switch (*c) {
	case 'p':
		s = RelPersistence::Permanent;
		break;
	case 'u':
		s = RelPersistence::Unlogged;
		break;
	case 't':
		s = RelPersistence::Temporary;
		break;
	}
}

void operator<<(RelKind &s, const Pgsql::Value &v)
{
	//s = static_cast<T>(v);
	const char *c = v.c_str();
	switch (*c) {
	case 'r':
		s = RelKind::Table;
		break;
	case 'i':
		s = RelKind::Index;
		break;
	case 'S':
		s = RelKind::Sequence;
		break;
	case 'v':
		s = RelKind::View;
		break;
	case 'm':
		s = RelKind::MaterializedView;
		break;
	case 'c':
		s = RelKind::Composite;
		break;
	case 't':
		s = RelKind::Toast;
		break;
	case 'f':
		s = RelKind::ForeignTable;
		break;
	}
}

//QString	PgClass::objectName() const
//{
//	return name;
//}

QString PgClass::createSql() const
{
	if (createSqlCache.isEmpty()) {
		if (kind == RelKind::Table)
			createSqlCache = createTableSql();
		else if (kind == RelKind::View)
			createSqlCache = createViewSql();

	}
	return createSqlCache;
}

QString PgClass::typeName() const
{
	switch (kind) {
	case RelKind::Table: return "TABLE";
	case RelKind::Index: return "INDEX";
	case RelKind::Sequence: return "SEQUENCE";
	case RelKind::View: return "VIEW";
	case RelKind::MaterializedView: return "MATERIALIZED VIEW";
	case RelKind::Composite: return "COMPOSITE";
	case RelKind::Toast: return "TOAST";
	case RelKind::ForeignTable: return "FOREIGN TABLE";
	}
	throw std::runtime_error("Unexpected value in PgClass::typeName()");
}

QString PgClass::aclAllPattern() const
{
	switch (kind) {
	case RelKind::Table: return "arwdDxt";
	default:
		break;
	}
	return {};
}

QString PgClass::createTableSql() const
{
	QString sql;
	//			CREATE [ TEMP | UNLOGGED ] TABLE [ IF NOT EXISTS ] table_name ( [
	sql += "CREATE ";
	if (persistence == RelPersistence::Unlogged)
		sql += "UNLOGGED ";
	else if (persistence == RelPersistence::Temporary)
		sql += "TEMP ";
	sql += "TABLE ";
	sql += fullyQualifiedQuotedObjectName();
	sql += " (\n    ";

	auto && cols = catalog().attributes()->getColumnsForRelation(oid());
	bool first = true;
	for (auto && col : cols) {
		if (col.num > 0 && !col.isdropped) {
			if (first) {
				sql += "\n    ";
				first = false;
			}
			else sql += ",\n    ";
			if (!col.islocal) sql += "-- ";
			sql += col.columnDefinition(catalog());
		}
//			  { column_name data_type [ COLLATE collation ] [ column_constraint [ ... ] ]
//				| table_constraint
//			] )
	}
	auto && constraints = catalog().constraints()->getConstraintsForRelation(oid());
	for (auto && constraint: constraints) {
		if (first) {
			sql += "\n    ";
			first = false;
		}
		else sql += ",\n    ";
		sql += getConstraintDefinition(catalog(), constraint);
	}

	sql += ")";
	{
		//			[ INHERITS ( parent_table [, ... ] ) ]
		auto parents = catalog().inherits()->getParentsOf(oid());
		if (!parents.empty()) {
			sql += "\nINHERITS (";
			bool first = true;
			for (auto parent_oid : parents) {
				if (first) first = false;
				else sql += ", ";
				sql += catalog().classes()->getByKey(parent_oid)->fullyQualifiedQuotedObjectName();
			}
			sql += ")";
		}
	}
//			[ PARTITION BY { RANGE | LIST } ( { column_name | ( expression ) } [ COLLATE collation ] [ opclass ] [, ... ] ) ]
//			[ WITH ( storage_parameter [= value] [, ... ] ) | WITH OIDS | WITHOUT OIDS ]
//			[ ON COMMIT { PRESERVE ROWS | DELETE ROWS | DROP } ]
//			[ TABLESPACE tablespace_name ]
	sql += ";\n";
	return sql;
}

QString PgClass::createViewSql() const
{
	QString sql;
	sql += "CREATE OR REPLACE VIEW " + fullyQualifiedQuotedObjectName();

	// todo security_barrier
	// todo check_option

	sql += " AS \n";
	sql += viewdef;

	// todo owner

	return sql;
}