#include "ConnectionIO.hpp"
#include "common/QvHelpers.hpp"

namespace Qv2ray::core::connection
{
    namespace ConnectionIO
    {
        CONFIGROOT _ReadConnection(const QString &connection)
        {
            QString jsonString = StringFromFile(connection);
            auto conf = CONFIGROOT(JsonFromString(jsonString));

            if (conf.count() == 0) {
                LOG(SETTINGS, "WARN: Possible file corruption, failed to load file: " + connection + " --> File might be empty.")
            }

            return conf;
        }

        QMap<QString, CONFIGROOT> GetRegularConnections(QStringList connectionNames)
        {
            QMap<QString, CONFIGROOT> list;

            for (auto conn : connectionNames) {
                list.insert(conn, _ReadConnection(QV2RAY_CONFIG_DIR + conn + QV2RAY_CONFIG_FILE_EXTENSION));
            }

            return list;
        }

        QMap<QString, CONFIGROOT> GetSubscriptionConnection(QString subscription)
        {
            auto _files = GetFileList(QV2RAY_SUBSCRIPTION_DIR + subscription);
            QMap<QString, CONFIGROOT> _config;

            for (auto _file : _files) {
                // check if is proper connection file.
                if (_file.endsWith(QV2RAY_CONFIG_FILE_EXTENSION)) {
                    auto confName = _file;
                    // Remove the extension
                    confName.chop(sizeof(QV2RAY_CONFIG_FILE_EXTENSION) - 1);
                    _config[confName] = _ReadConnection(QV2RAY_SUBSCRIPTION_DIR + subscription + "/" + _file);
                } else {
                    LOG(SUBSCRIPTION, "Found a file in subscription folder but without proper suffix: " + _file)
                }
            }

            if (_config.isEmpty()) {
                LOG(SUBSCRIPTION, "WARN: Maybe loading an empty subscrption: " + subscription)
            }

            return _config;
        }

        QMap<QString, QMap<QString, CONFIGROOT>> GetSubscriptionConnections(QStringList subscriptions)
        {
            //   SUB-NAME    CONN-NAME  CONN-ROOT
            QMap<QString, QMap<QString, CONFIGROOT>> list;

            for (auto singleSub : subscriptions) {
                LOG(SUBSCRIPTION, "Processing subscription: " + singleSub)
                list[singleSub] = GetSubscriptionConnection(singleSub);
            }

            return list;
        }

        //
        // Save Connection to a place, with checking if there's existing file.
        // If so, append "_N" to the name.
        bool SaveConnectionConfig(CONFIGROOT obj, QString *alias, bool canOverrideExisting)
        {
            auto str = JsonToString(obj);
            auto fullPath = QV2RAY_CONFIG_DIR + *alias + QV2RAY_CONFIG_FILE_EXTENSION;

            // If there's already a file AND we CANNOT override existing file.
            if (QFile::exists(fullPath) && !canOverrideExisting) {
                // Alias is a pointer to a QString.
                DeducePossibleFileName(QV2RAY_CONFIG_DIR, alias, QV2RAY_CONFIG_FILE_EXTENSION);
                fullPath = QV2RAY_CONFIG_DIR + *alias + QV2RAY_CONFIG_FILE_EXTENSION;
            }

            LOG(SETTINGS, "Saving a config named: " + *alias)
            QFile config(fullPath);
            return StringToFile(&str, &config);
        }

        bool SaveSubscriptionConfig(CONFIGROOT obj, const QString &subscription, QString *name)
        {
            auto str = JsonToString(obj);
            auto fName = *name;

            if (!IsValidFileName(fName)) {
                fName = RemoveInvalidFileName(fName);
            }

            QFile config(QV2RAY_SUBSCRIPTION_DIR + subscription + "/" + fName + QV2RAY_CONFIG_FILE_EXTENSION);

            // If there's already a file. THIS IS EXTREMELY RARE
            if (config.exists()) {
                LOG(FILEIO, "Trying to overrwrite an existing subscription config file. THIS IS RARE")
            }

            LOG(SETTINGS, "Saving a subscription named: " + fName)
            bool result = StringToFile(&str, &config);

            if (!result) {
                LOG(FILEIO, "Failed to save a connection config from subscription: " + subscription + ", name: " + fName)
            }

            *name = fName;
            return result;
        }

        bool RemoveConnection(const QString &alias)
        {
            QFile config(QV2RAY_CONFIG_DIR + alias + QV2RAY_CONFIG_FILE_EXTENSION);

            if (!config.exists()) {
                LOG(FILEIO, "Trying to remove a non-existing file?")
                return false;
            } else {
                return config.remove();
            }
        }

        bool RemoveSubscriptionConnection(const QString &subsName, const QString &name)
        {
            QFile config(QV2RAY_SUBSCRIPTION_DIR + subsName + "/" + name + QV2RAY_CONFIG_FILE_EXTENSION);

            if (!config.exists()) {
                LOG(FILEIO, "Trying to remove a non-existing file?")
                return false;
            } else {
                return config.remove();
            }
        }

        bool RenameConnection(const QString &originalName, const QString &newName)
        {
            LOG(CONNECTION, "[RENAME] --> ORIGINAL: " + originalName + ", NEW: " + newName)
            return QFile::rename(QV2RAY_CONFIG_DIR + originalName + QV2RAY_CONFIG_FILE_EXTENSION, QV2RAY_CONFIG_DIR + newName + QV2RAY_CONFIG_FILE_EXTENSION);
        }

        bool RenameSubscription(const QString &originalName, const QString &newName)
        {
            LOG(SUBSCRIPTION, "[RENAME] --> ORIGINAL: " + originalName + ", NEW: " + newName)
            return QDir().rename(QV2RAY_SUBSCRIPTION_DIR + originalName, QV2RAY_SUBSCRIPTION_DIR + newName);
        }

        CONFIGROOT ConvertConfigFromFile(QString sourceFilePath, bool keepInbounds)
        {
            QFile source(sourceFilePath);

            if (!source.exists()) {
                LOG(FILEIO, "Trying to import from an non-existing file.")
                return CONFIGROOT();
            }

            auto root = CONFIGROOT(JsonFromString(StringFromFile(&source)));

            if (!keepInbounds) {
                JSON_ROOT_TRY_REMOVE("inbounds")
            }

            JSON_ROOT_TRY_REMOVE("log")
            JSON_ROOT_TRY_REMOVE("api")
            JSON_ROOT_TRY_REMOVE("stats")
            JSON_ROOT_TRY_REMOVE("dns")
            return root;
        }
    }
}