//
// Created by GPL on 2021/7/24.
//

#ifndef C___COMMANDLINE_H
#define C___COMMANDLINE_H
#include<iostream>
#include<string>
#include<algorithm>
#include<vector>
using namespace std;
/**
 * @brief: Commandline parsing
 *         command format `git {action} [option | args...]`
 *         commands need to be done:
 *                  cmdline, add, rm, mv, commit, diff, hash, differ
 */
class Commandline {
public:
    // argument classes
    class Option{
    public:
        // long options, short options, aliased options
        vector<string> options;
        // kind of values
        vector<string> values;
        string help;

        Option(vector<string> options, string help = ""):options(move(options)), help(help){};
        Option(string option, string value, string help = "")
        {
            this->options.emplace_back(option);
            this->values.emplace_back(value);
            this->help = help;
        }
        Option(vector<string> options,string values, string help){
            this->options = move(options); 
            this->values.emplace_back(values);
            this->help = help;
        };
    };
    class Argument{
    public:
        string action;
        string description;
        vector<Option> options;
        Argument(string action, string description=""):action(action),description(description){};
    };

    void add_action(string action){
        this->arguments.emplace_back(Argument(action));
    };
    void add_help(string action, string description) {
        bool if_find = false;
        for(vector<Argument>::iterator it = arguments.begin();it != arguments.end();it++)
        {
            if(it->action == action)
            {
                if_find = true;
                it->description = description;
                break;
            }
        }
        if(not if_find)
        {
            cout << "[" << action << "]" << "is not registered, please call add_action first" << endl;
        }
    }
    void add_option(string action, string short_opt, string long_opt, string opt_help="");
    void parse(int argc, char* argv[]) ;



    void printHelp(ostream &os = cout) const;
    string get_action(void){
        return action;
    }
    vector<string> get_option(void);
    

private:
    vector<Argument> arguments;
    string action;
    // pair of option and arguments
    vector<pair<string,string>> opt_args;
    
};


#endif //C___COMMANDLINE_H