#include "pq-prepared.h"
#include "command.h"
#include "pq-command.h"
#include "pq-connection.h"
#include <iosfwd>
#include <libpq-fe.h>
#include <map>
#include <type_traits>
#include <utility>
#include <vector>

PQ::PreparedStatement::PreparedStatement(Connection * c, const std::string & sql, const DB::CommandOptionsCPtr & opts) :
	DB::Command(sql), Command(c, sql, opts), pstmt(nullptr)
{
}

const char *
PQ::PreparedStatement::prepare() const
{
	if (pstmt) {
		return pstmt;
	}
	auto i = c->preparedStatements.find(hash);
	if (i != c->preparedStatements.end()) {
		return (pstmt = i->second.c_str());
	}
	std::stringstream psql;
	prepareSql(psql, sql);
	c->checkResultFree(PQprepare(c->conn, stmntName.c_str(), std::move(psql).str().c_str(),
							   static_cast<int>(values.size()), nullptr),
			PGRES_COMMAND_OK);
	return (pstmt = c->preparedStatements.insert({hash, stmntName}).first->second.c_str());
}