/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   BitcoinExchange.cpp                                :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: bchanot <bchanot@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2026/01/16 19:29:59 by bchanot           #+#    #+#             */
/*   Updated: 2026/01/16 19:35:25 by bchanot          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "BitcoinExchange.hpp"
#include <fstream>
#include <climits>

void    ft_getcsv(std::map<Date, float> &Data)
{
    std::string     line;
    std::ifstream   ifs;
    std::string     token;
    float           price;
    Date            tmp;

    ifs.open("data.csv");
    if (!ifs) {
        std::cout << "Error: could not open data.csv file." << std::endl;
        throw std::exception();
    }
    std::getline(ifs, line);
    while (std::getline(ifs, line)) {

        token = line.substr(0, line.find(','));
        tmp.year = atoi(token.substr(0, 4).c_str());
        tmp.month = atoi(token.substr(5, 2).c_str());
        tmp.day = atoi(token.substr(8, 2).c_str());

        price = atof(line.substr(line.find(',') + 1, line.find('\n')).c_str());

        if (tmp.year < 0 || tmp.month < 0 || tmp.month > 12 || tmp.day < 0 || tmp.day > 31) {
            std::cout << "Error : Error in csv dates." << std::endl;
            throw std::exception();
        }
        if (price < 0 || price > INT_MAX) {
            std::cout << "Error : Error in csv price." << std::endl;
            throw std::exception();
        }
        Data[tmp] = price;
    }
}

void    ft_process(char **av, std::map<Date, float> &Data) {
    std::ifstream                   ifs;
    std::string                     line;
    std::string                     token;
    std::map<Date, float>::iterator it;
    float                           amount;
    Date                            tmp;

    ifs.open(av[1]);
    if (!ifs) {
        std::cout << "Error: could not open " << av[1] << "." << std::endl;
        throw std::exception();
    }

    std::getline(ifs, line);
    while (std::getline(ifs, line)) { 
        token = line.substr(0, line.find('|'));
        tmp.year = atoi(token.substr(0, 4).c_str());
        tmp.month = atoi(token.substr(5, 2).c_str());
        tmp.day = atoi(token.substr(8, 2).c_str());

        amount = atof(line.substr(line.find('|') + 1, line.find('\n')).c_str());
        if (tmp.year < 0 || tmp.month < 0 || tmp.month > 12 || tmp.day < 0 || tmp.day > 31) {
            std::cout << "Error : Bad date." << std::endl;
            continue ;
        }
        if (amount < 0 || amount > INT_MAX) {
            std::cout << "Error : Bad price." << std::endl;
            continue ;
        }

        it = Data.lower_bound(tmp);
        if (it->first != tmp) {
            if (it == Data.begin())
                std::cout << "Cannot find a price at the value " << tmp << "." << std::endl;
            else
                std::cout << tmp << " => " << amount << " = " << (--it)->second * amount << std::endl;
        } else
            std::cout << it->first << " => " << amount << " = " << it->second * amount << std::endl;
    }
}