#include "LocalizationFile.hpp"
#include <fstream>
#include <iostream>
#include <regex>

const std::regex keyChecker = std::regex("[^a-z0-9_]+");

static bool IsKeyValid(const std::string_view & key){
    if (std::regex_search(key.begin(), key.end(), keyChecker)){
        return false;
    }
    return true;
}

const char PossibleSeparators[] = {
    ',', ';', '|', '\t', ':'
};

void LocalizationFile::LoadFile(const std::filesystem::path& path) {
    if (!std::filesystem::exists(path)) {
        std::stringstream ss;
        ss << "File at path " << path << " does not exist.";
        throw std::logic_error(ss.str());
    }
    std::ifstream file;
    file.open(path, std::ios::in);
    if (!file.is_open()) {
        std::stringstream ss;
        ss << "Something went wrong opening file at path " << path;
        throw std::logic_error(ss.str());
    }
    std::string line;
    char sep = ',';
    bool firstLine = true;
    while (std::getline(file, line)) {
        if (firstLine) {
            firstLine = false;
            for (auto& s :PossibleSeparators) {
                if (line.find(s) != std::string::npos){
                    sep = s;
                    break;
                }
            }
        }
        std::string key;
        std::string value;
        std::stringstream linestream(line);
        std::getline(linestream, key, sep);
        std::getline(linestream, value, sep);
        if (key.empty())
            continue;
        if (key == "key" && value == "value")
            continue;
        if (!IsKeyValid(key)){
            std::cout << "Key not valid: '" << key << "'. Skipping key." << std::endl;
        }
        _map[key] = value;
    }
    file.close();
}