#include "localization.h"
#include "yamlparser.h"
#include <QDebug>

Localization& Localization::instance()
{
    static Localization s_instance;
    return s_instance;
}

Localization::Localization()
    : m_loaded(false)
{
}

void Localization::flattenNode(const YamlNode &node, const QString &prefix)
{
    if (!node.value.isEmpty()) {
        m_strings[prefix] = node.value;
    }
    for (auto it = node.children.begin(); it != node.children.end(); ++it) {
        QString nextPrefix = prefix.isEmpty() ? it.key() : (prefix + "." + it.key());
        flattenNode(it.value(), nextPrefix);
    }
}

bool Localization::loadFile(const QString &filePath)
{
    YamlNode root = YamlParser::parseFile(filePath);
    if (root.children.isEmpty() && root.value.isEmpty()) {
        qWarning() << "Failed to parse localization file:" << filePath;
        return false;
    }

    m_strings.clear();
    flattenNode(root, "");
    m_loaded = true;
    qDebug() << "Localization loaded" << m_strings.size() << "keys from" << filePath;
    return true;
}

QString Localization::get(const QString &key, const QString &defaultVal) const
{
    auto it = m_strings.find(key);
    if (it != m_strings.end()) {
        return it.value();
    }
    return defaultVal.isEmpty() ? key : defaultVal;
}