//
// Created by selim on 09.01.2022.
//

#include "Settings.h"
#include <nlohmann/json.hpp>

#include <cstdlib>
#include <iostream>
#include <fstream>

fs::path Settings::getDataPath() {
    auto dataDir = std::getenv("XDG_DATA_HOME");
    if(dataDir) {
        return fs::path(dataDir) / "autocat";
    }

    auto home = std::getenv("HOME");
    if(home) {
        return fs::path(home) / ".local" / "share" / "autocat";
    }

    throw std::runtime_error("Failed to find data home directory");
}

std::string readString(const fs::path& path) {
    std::ifstream stream(path);
    stream.seekg(0, std::ios::end);
    auto size = stream.tellg();
    std::string buffer(size, ' ');
    stream.seekg(0);
    stream.read(&buffer[0], size);
    return buffer;
}

void writeString(const fs::path& path, const std::string& text) {
    std::ofstream stream(path);
    stream << text;
}

Settings Settings::instance() {
    static Settings instance;
    return instance;
}

Settings::Settings() {
    _dataPath = getDataPath();
    if(!fs::exists(_dataPath)) {
        fs::create_directories(_dataPath);
    }
}

User Settings::user() const {
    auto userFile = _dataPath / "user.json";
    if(fs::exists(userFile)) {
        auto jsonText = readString(userFile);
        std::cout << "User json text: " << jsonText << std::endl;
        return nlohmann::json::parse(jsonText).get<User>();
    } else {
        return {};
    }
}

void Settings::setUser(const User &user) {
    auto userFile = _dataPath / "user.json";
    nlohmann::json json = user;
    auto userString = json.dump(4);
    writeString(userFile, userString);
}