#ifndef ORDLE_H
#define ORDLE_H

#include <iostream>
#include <vector>
#include <string>
#include <map>
#include <algorithm>
#include <sstream>
#include <tuple>

// Helper types and aliases
using size_type = std::string::size_type;
using letters_and_indices = std::map<size_type, std::string>;

// Function declarations
std::vector<std::string> read_candidates(std::istream &input);

bool contains_any_of(const std::string &s, const std::string &cs);
bool contains_at(const std::string &s, char c, size_type pos);
bool contains_but_not_at(const std::string &s, char c, size_type pos);

// Functors
struct wrong_fn {
    explicit wrong_fn(const std::string &letters);
    bool operator()(const std::string &word) const;

private:
    std::string l;
};

struct correct_fn {
    explicit correct_fn(const letters_and_indices &idxs);
    bool operator()(const std::string &word) const;

private:
    letters_and_indices m;
};

struct misplaced_fn {
    explicit misplaced_fn(const letters_and_indices &idxs);
    bool operator()(const std::string &word) const;

private:
    letters_and_indices m;
};

void do_filter(std::vector<std::string> &candidates, const std::string &wrong,
               const letters_and_indices &green, const letters_and_indices &yellow);

letters_and_indices build_list(const std::string &line);
std::tuple<std::string, letters_and_indices, letters_and_indices> prompt();

#endif // ORDLE_H