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#pragma once
#include <algorithm>
#include <cstddef>
#include <queue>
#include <set>
#include <string>
#include <map>
#include <memory>
#include <vector>
#include <iostream>
using function = std::string;
struct group {
std::set<function> members;
};
using group_ptr = std::unique_ptr<group>;
class function_graph {
using group_id = size_t;
struct group_data {
std::set<function> functions;
std::set<group_id> adjacency_list;
size_t indegree;
};
using data_ptr = std::shared_ptr<group_data>;
using edge = std::pair<function, function>;
using group_edge = std::pair<group_id, group_id>;
std::map<function, std::set<function>> adjacency_lists;
std::set<edge> edges;
std::set<edge> compute_transitive_edges();
void create_groups(
const std::set<edge>&,
std::map<function, group_id>&,
std::map<group_id, data_ptr>&);
void create_edges(
std::map<function, group_id>&,
std::map<group_id, data_ptr>&);
std::vector<group_ptr> generate_order(
std::map<function, group_id>&,
std::map<group_id, data_ptr>&);
public:
std::set<function>& add_function(const function& f);
void add_edge(const function& from, const function& to);
std::vector<group_ptr> compute_order();
};