#ifndef NUMBER_PARSER_H_
#define NUMBER_PARSER_H_

#include <string>
#include <vector>
#include <set>
#include <iostream>
#include <algorithm>
#include <fstream>

#include "nlohmann/json.hpp"


namespace parser
{

class some_object
{
public:
    some_object() = default;
    some_object(std::string value) :
        value(value)
    {
    }

    ~some_object() = default;

    std::string value;
private:
};


template<typename Obj>
class number_parser
{
public:
    number_parser(const std::string &filepath) :
        filepath(filepath)
    { }

    template<typename Con = std::vector<Obj>>
    Con file_dump()
    {
        Con container;

        std::fstream file(this->filepath.c_str(), std::ios::in);

        if (!file.is_open())
        {
            std::cout << "File is not openned...\n";
            std::cout << "Openning file: " << this->filepath << "\n";
            file.open(filepath.c_str());
        }

        std::string line;
        int i = 0;

        while (std::getline(file, line))
        {
            if (line.size() > 1)
            {
                container.push_back(line);
            }
        }

        file.close();

        return container;
    }

    template<typename Con = std::vector<Obj>>
    Con update_values(const Con &values)
    {
        Con container;
        std::vector<char> remove_chars;
        remove_chars.reserve(4);
        remove_chars.push_back(')');
        remove_chars.push_back('(');
        remove_chars.push_back(32);
        remove_chars.push_back('-');

        auto prefix = "+1";
        std::string parsed;

        for (const auto &item : values)
        {
            parsed.assign(item.value);

            if (parsed.size() < 2)
            {
                std::cout << parsed << " is an invalid number. Continuing with the next number\n";
                continue;
            }

            auto pars = remove_some_data(parsed, remove_chars);
            parsed.clear();
            parsed.assign(pars);

            add_prefix(parsed);

            container.push_back(parsed);
            parsed.clear();
        }

        return container;
    }

    template<typename Con = std::vector<Obj>>
    void remove_duplicates(Con &container)
    {
        std::set<std::string> tmpContainer;

        auto act = [&](Obj& ob)
        {
            tmpContainer.emplace(ob.value);
        };

        std::for_each(container.begin(), container.end(), act);
        container.clear();

        auto actReplace = [&](std::string value)
        {
            Obj o(value);
            container.emplace_back(o);
        };
        
        std::for_each(tmpContainer.begin(), tmpContainer.end(), actReplace);
    }

    template<typename Con = std::vector<Obj>>
    void save_file(const Con container)
    {
        std::set<std::string> my_set;

        const std::string filepath("my_file.json");;

        for (const auto &s : container)
        {
            my_set.insert(s.value);
        }


        nlohmann::json j(my_set);

        std::cout << "Saving data to file: " << filepath << "\n";

        std::fstream output(filepath.c_str(), std::ios::out);
        output << j.dump(4);

        output.close();

        std::cout << "The file has been saved\n";
    }

    template<typename Con = std::vector<Obj>>
    void print_values(const Con container)
    {
        if (!(container.size() > 0))
        {
            std::cout << "Empty container\n";
            return;
        }

        std::cout << "Printing values\n";

        for (const auto &item : container)
        {
            std::cout << "Value: " << item.value << "\n";
        }
    }
private:
    std::string remove_some_data(const std::string &unparsed, const std::vector<char> &remove_chars)
    {
        std::string parsed;

        std::cout << "Unparsed: " << unparsed << "\n";

        for (auto i = 0; i < unparsed.size(); ++i)
        {
            char c = unparsed.at(i);

            if (std::isdigit(c))
            {
                parsed.append(std::to_string(c-48));
            }
        }

        std::cout << "Parsed: " << parsed << "\n";

        return parsed;
    }

    void add_prefix(std::string &parsed)
    {
        auto last_char = parsed.at(parsed.size() - 1);
        auto first_char = parsed.at(0);
        auto second_char = parsed.at(1);


        if (first_char == '1')
        {
            parsed.insert(0, "+");
        }
        else if (first_char != '+')
        {
            if (second_char != '1')
            {
                parsed.insert(0, "+1");
            }
            else
            {
                parsed.insert(0, "+1");
            }
        }
    }

    int add_prefix_if_not_found(std::string &parsed, const std::string &prefixes)
    {
        auto prefix_size = prefixes.size();
        auto parsed_beginning = parsed.substr(0, prefix_size);

        return 0;
    }


    std::string filepath;
};    

}


#endif