#include "components/misc/osgpluginchecker.hpp"

#include <components/debug/debuglog.hpp>

#include <osgDB/PluginQuery>

#include <algorithm>
#include <string_view>

namespace Misc
{
    namespace
    {
        std::string_view USED_OSG_PLUGINS = "${USED_OSG_PLUGINS}";

        constexpr std::vector<std::string_view> getRequiredOSGPlugins()
        {
            std::vector<std::string_view> requiredOSGPlugins;
            auto currentStart = USED_OSG_PLUGINS.begin();
            while (currentStart != USED_OSG_PLUGINS.end())
            {
                auto currentEnd = std::find(currentStart, USED_OSG_PLUGINS.end(), ';');
                requiredOSGPlugins.emplace_back(currentStart, currentEnd);
                if (currentEnd == USED_OSG_PLUGINS.end())
                    break;
                currentStart = currentEnd + 1;
            }
            return requiredOSGPlugins;
        }
    }

    bool checkRequiredOSGPluginsArePresent()
    {
        auto availableOSGPlugins = osgDB::listAllAvailablePlugins();
        auto requiredOSGPlugins = getRequiredOSGPlugins();
        bool haveAllPlugins = true;
        for (std::string_view plugin : requiredOSGPlugins)
        {
            if (std::find(availableOSGPlugins.begin(), availableOSGPlugins.end(), plugin) == availableOSGPlugins.end())
            {
                Log(Debug::Error) << "Missing OSG plugin: " << plugin;
                haveAllPlugins = false;
            }
        }
        return haveAllPlugins;
    }
}