#include "CrossLang.hpp"
#include "TessesFramework/Serialization/BitConverter.hpp"

#if defined(_WIN32)
#include <windows.h>
#endif

namespace Tesses::CrossLang {
using namespace Tesses::Framework::Platform::Environment;
#if defined(_WIN32)
static char EnvPathSeperator = ';';
#else
static char EnvPathSeperator = ':';
#endif

Tesses::Framework::Filesystem::VFSPath CrossLangConfigPath("");

Tesses::Framework::Filesystem::VFSPath GetCrossLangConfigDir() {
    if (!CrossLangConfigPath.path.empty())
        return CrossLangConfigPath;

    return SpecialFolders::GetConfig() / "Tesses" / "CrossLang";
}

static TObject Env_getCrossLangConfig(GCList &ls, std::vector<TObject> args) {
    return GetCrossLangConfigDir();
}
static TObject Env_getPlatform(GCList &ls, std::vector<TObject> args) {
    return Tesses::Framework::Platform::Environment::GetPlatform();
}
static TObject Env_GetAt(GCList &ls, std::vector<TObject> args) {
    std::string key;
    if (GetArgument(args, 0, key)) {
        auto v = GetVariable(key);
        if (v)
            return v.value();
    }
    return nullptr;
}
static TObject Env_SetAt(GCList &ls, std::vector<TObject> args) {
    std::string key;
    std::string value;
    if (GetArgument(args, 0, key)) {
        if (GetArgument(args, 1, value)) {
            SetVariable(key, value);

            return value;
        } else {
            SetVariable(key, std::nullopt);
        }
    }
    return nullptr;
}
static TObject Env_getDownloads(GCList &ls, std::vector<TObject> args) {
    return SpecialFolders::GetDownloads();
}
static TObject Env_getMusic(GCList &ls, std::vector<TObject> args) {
    return SpecialFolders::GetMusic();
}
static TObject Env_getPictures(GCList &ls, std::vector<TObject> args) {
    return SpecialFolders::GetPictures();
}
static TObject Env_getVideos(GCList &ls, std::vector<TObject> args) {
    return SpecialFolders::GetVideos();
}
static TObject Env_getDocuments(GCList &ls, std::vector<TObject> args) {
    return SpecialFolders::GetDocuments();
}
static TObject Env_getConfig(GCList &ls, std::vector<TObject> args) {
    return SpecialFolders::GetConfig();
}

static TObject Env_getDesktop(GCList &ls, std::vector<TObject> args) {
    return SpecialFolders::GetDesktop();
}
static TObject Env_getState(GCList &ls, std::vector<TObject> args) {
    return SpecialFolders::GetState();
}
static TObject Env_getCache(GCList &ls, std::vector<TObject> args) {
    return SpecialFolders::GetCache();
}
static TObject Env_getData(GCList &ls, std::vector<TObject> args) {
    return SpecialFolders::GetData();
}
static TObject Env_getUser(GCList &ls, std::vector<TObject> args) {
    return SpecialFolders::GetHomeFolder();
}
static TObject Env_GetRealExecutablePath(GCList &ls,
                                         std::vector<TObject> args) {
    Tesses::Framework::Filesystem::VFSPath p;
    if (GetArgumentAsPath(args, 0, p)) {
        return GetRealExecutablePath(p);
    }
    return Tesses::Framework::Filesystem::VFSPath();
}
static TObject Env_GetAll(GCList &ls, std::vector<TObject> args) {
    ls.GetGC()->BarrierBegin();
    TList *list = TList::Create(ls);
    std::vector<std::pair<std::string, std::string>> env;
    Tesses::Framework::Platform::Environment::GetEnvironmentVariables(env);
    for (auto &item : env) {
        list->Add(TDictionary::Create(
            ls, {TDItem("Key", item.first), TDItem("Value", item.second)}));
    }
    ls.GetGC()->BarrierEnd();
    return list;
}
static TObject Env_getLittleEndian(GCList &ls, std::vector<TObject> args) {
    return Tesses::Framework::Serialization::BitConverter::IsLittleEndian();
}
void TStd::RegisterEnv(std::shared_ptr<GC> gc, TRootEnvironment *env) {

    env->permissions.canRegisterEnv = true;
    GCList ls(gc);
    TDictionary *dict = TDictionary::Create(ls);
    dict->DeclareFunction(gc, "GetAt", "Get environment variable", {"key"},
                          Env_GetAt);
    dict->DeclareFunction(gc, "SetAt", "Set environment variable",
                          {"key", "value"}, Env_SetAt);
    dict->DeclareFunction(gc, "GetAll", "Get all of the environment variables",
                          {}, Env_GetAll);

    dict->DeclareFunction(gc, "getDesktop", "Get desktop folder", {},
                          Env_getDesktop);
    dict->DeclareFunction(gc, "getDownloads", "Get downloads folder", {},
                          Env_getDownloads);
    dict->DeclareFunction(gc, "getDocuments", "Get documents folder", {},
                          Env_getDocuments);
    dict->DeclareFunction(gc, "getMusic", "Get music folder", {}, Env_getMusic);
    dict->DeclareFunction(gc, "getPictures", "Get pictures folder", {},
                          Env_getPictures);
    dict->DeclareFunction(gc, "getVideos", "Get videos folder", {},
                          Env_getVideos);
    dict->DeclareFunction(gc, "getState", "Get state folder", {}, Env_getState);
    dict->DeclareFunction(gc, "getCache", "Get cache folder", {}, Env_getCache);
    dict->DeclareFunction(gc, "getConfig", "Get config folder", {},
                          Env_getConfig);
    dict->DeclareFunction(gc, "getCrossLangConfig",
                          "Get crosslang configuration folder", {},
                          Env_getCrossLangConfig);
    dict->DeclareFunction(gc, "getData", "Get data folder", {}, Env_getData);
    dict->DeclareFunction(gc, "getUser", "Get user folder", {}, Env_getUser);
    dict->DeclareFunction(gc, "getPlatform", "Get platform name", {},
                          Env_getPlatform);
    dict->DeclareFunction(gc, "GetRealExecutablePath",
                          "Get the absolute path for executable", {"path"},
                          Env_GetRealExecutablePath);
    dict->DeclareFunction(gc, "getLittleEndian",
                          "Is the platform little endian", {},
                          Env_getLittleEndian);
    gc->BarrierBegin();
    dict->SetValue("EnvPathSeperator", EnvPathSeperator);
    env->SetVariable("Env", dict);
    gc->BarrierEnd();
}
} // namespace Tesses::CrossLang