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/*
 * This file is part of smolbote. It's copyrighted by the contributors recorded
 * in the version control history of the file, available from its original
 * location: https://neueland.iserlohn-fortress.net/smolbote.hg
 *
 * SPDX-License-Identifier: GPL-3.0
 */

#ifndef SMOLBOTE_CONFIGURATION_H
#define SMOLBOTE_CONFIGURATION_H

#include <QAction>
#include <QString>
#include <QStringList>
#include <QVariant>
#include <boost/program_options.hpp>
#include <optional>
#include <string>
#include <vector>

class Configuration : public QObject
{
    Q_OBJECT

public:
    explicit Configuration(QObject *parent = nullptr);
    ~Configuration() = default;

    bool parse(const std::string &path);
    bool parse(int argc, char **argv);

    const std::vector<boost::shared_ptr<boost::program_options::option_description>> &options()
    {
        return configuration_desc.options();
    }

    bool exists(const char *path)
    {
        return vm.count(path) ? true : false;
    }

    template <typename T>
    std::optional<T> value(const char *path) const
    {
        // if setting doesn't exist, we crash
        // in debug builds, check if setting exists

        if(vm.count(path) == 0) {
#ifdef QT_DEBUG
            qWarning("value(%s) does not exist", path);
#endif
            return std::nullopt;
        }

        if constexpr(std::is_same_v<T, QString>) {
            return std::optional<QString>(QString::fromStdString(this->value<std::string>(path).value()));
            //return std::optional<QString>(vm[path].as<const char*>());

        } else if constexpr(std::is_same_v<T, std::string>) {

            if(vm[path].value().type() == typeid(int)) {
                return std::optional<std::string>(std::to_string(vm[path].as<int>()));
            }

            if(vm[path].value().type() == typeid(bool)) {
                return std::optional<std::string>(vm[path].as<bool>() ? "true" : "false");
            }

            std::string r = vm[path].as<std::string>();

            // check if it's a path
            if(r.front() == '~') {
                r.replace(0, 1, m_homePath);
            }

            return std::optional<std::string>(r);

        } else
            return std::optional<T>(vm[path].as<T>());
    }

    template <typename T>
    void setValue(const char *path, const T &value)
    {
        if(vm.count(path) == 0) {
            qWarning("value(%s) does not exist", path);
        }

        vm.at(path).value() = value;

        emit settingChanged(path, value);
    }

    void setShortcut(QAction *action, const char *name) const
    {
        Q_CHECK_PTR(action);

        action->setShortcut(QKeySequence::fromString(value<QString>(name).value()));
        connect(this, &Configuration::settingChanged, action, [=](const std::string &path, const QString &value) {
            if(path == name)
                action->setShortcut(QKeySequence::fromString(value));
        });
    }

    QHash<QString, QString> section(const std::string &prefix) const;
    const boost::program_options::options_description commandlineOptions() const
    {
        return commandLine_desc;
    }
    const boost::program_options::options_description configurationOptions() const
    {
        return configuration_desc;
    }

signals:
    void settingChanged(const std::string &path, const QString &value);

private:
    boost::program_options::options_description commandLine_desc;
    boost::program_options::options_description configuration_desc;
    boost::program_options::positional_options_description arguments_desc;
    boost::program_options::variables_map vm;

    std::string m_homePath;
};

#endif // SMOLBOTE_CONFIGURATION_H