/*
 * Copyright (c) 2025 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <cstring>
#include <vector>
#include <string>

#include "interop-logging.h"
#include "convertors-napi.h"

// NOLINTBEGIN(cppcoreguidelines-macro-usage)

// Adapter for NAPI_MODULE
#define NODE_API_MODULE_ADAPTER(modname, regfunc)                        \
    static napi_value __napi_##regfunc(napi_env env, napi_value exports) \
    {                                                                    \
        /* CC-OFFNXT(G.PRE.05) code generation */                        \
        return Napi::RegisterModule(env, exports, regfunc);              \
    }                                                                    \
    NAPI_MODULE(modname, __napi_##regfunc)

// NOLINTEND(cppcoreguidelines-macro-usage)

napi_valuetype GetValueTypeChecked(napi_env env, napi_value value)
{
    napi_valuetype type;
    napi_status status = napi_typeof(env, value, &type);
    TS_NAPI_THROW_IF_FAILED(env, status, napi_undefined);
    return type;
}

bool IsTypedArray(napi_env env, napi_value value)
{
    bool result = false;
    napi_status status = napi_is_typedarray(env, value, &result);
    TS_NAPI_THROW_IF_FAILED(env, status, false);
    return result;
}

KBoolean GetBoolean(napi_env env, napi_value value)
{
    if (GetValueTypeChecked(env, value) == napi_valuetype::napi_boolean) {
        bool result = false;
        napi_get_value_bool(env, value, &result);
        return static_cast<KBoolean>(result);
    }
    return static_cast<KBoolean>(GetInt32(env, value) != 0);
}

KInt GetInt32(napi_env env, napi_value value)
{
    if (GetValueTypeChecked(env, value) != napi_valuetype::napi_number) {
        napi_throw_error(env, nullptr, "Expected Number");
        return 0;
    }
    int32_t result = 0;
    napi_get_value_int32(env, value, &result);
    return static_cast<KInt>(result);
}

KUInt GetUInt32(napi_env env, napi_value value)
{
    if (GetValueTypeChecked(env, value) != napi_valuetype::napi_number) {
        napi_throw_error(env, nullptr, "Expected Number");
        return 0;
    }
    uint32_t result = 0U;
    napi_get_value_uint32(env, value, &result);
    return static_cast<KUInt>(result);
}

KFloat GetFloat32(napi_env env, napi_value value)
{
    if (GetValueTypeChecked(env, value) != napi_valuetype::napi_number) {
        napi_throw_error(env, nullptr, "Expected Number");
        return 0.0F;
    }
    double result = 0.0;
    napi_get_value_double(env, value, &result);
    return static_cast<KFloat>(static_cast<float>(result));
}

KDouble GetFloat64(napi_env env, napi_value value)
{
    if (GetValueTypeChecked(env, value) != napi_valuetype::napi_number) {
        napi_throw_error(env, nullptr, "Expected Number");
        return 0.0;
    }
    double result = 0.0;
    napi_get_value_double(env, value, &result);
    return static_cast<KDouble>(result);
}

KStringPtr GetString(napi_env env, napi_value value)
{
    KStringPtr result {};
    napi_valuetype valueType = GetValueTypeChecked(env, value);
    if (valueType == napi_valuetype::napi_null || valueType == napi_valuetype::napi_undefined) {
        return result;
    }

    if (valueType != napi_valuetype::napi_string) {
        napi_throw_error(env, nullptr, "Expected String");
        return result;
    }

    size_t length = 0;
    napi_status status = napi_get_value_string_utf8(env, value, nullptr, 0, &length);
    if (status != 0) {
        return result;
    }
    result.Resize(length);
    status = napi_get_value_string_utf8(env, value, result.Data(), length + 1, nullptr);
    TS_NAPI_THROW_IF_FAILED(env, status, KStringPtr(nullptr));

    return result;
}

KNativePointer GetPointer(napi_env env, napi_value value)
{
    napi_valuetype valueType = GetValueTypeChecked(env, value);
    if (valueType == napi_valuetype::napi_external) {
        KNativePointer result = nullptr;
        napi_status status = napi_get_value_external(env, value, &result);
        TS_NAPI_THROW_IF_FAILED(env, status, nullptr);
        return result;
    }

    if (valueType != napi_valuetype::napi_bigint) {
        napi_throw_error(env, nullptr, "cannot be coerced to pointer");
        return nullptr;
    }

    bool isWithinRange = true;
    uint64_t ptrU64 = 0;
    napi_status status = napi_get_value_bigint_uint64(env, value, &ptrU64, &isWithinRange);
    TS_NAPI_THROW_IF_FAILED(env, status, nullptr);
    if (!isWithinRange) {
        napi_throw_error(env, nullptr, "cannot be coerced to uint64, value is too large");
        return nullptr;
    }
    return reinterpret_cast<KNativePointer>(ptrU64);
}

KLong GetInt64(napi_env env, napi_value value)
{
    if (GetValueTypeChecked(env, value) != napi_valuetype::napi_bigint) {
        napi_throw_error(env, nullptr, "cannot be coerced to int64");
        return -1;
    }

    bool isWithinRange = true;
    int64_t ptr64 = 0;
    napi_get_value_bigint_int64(env, value, &ptr64, &isWithinRange);
    if (!isWithinRange) {
        napi_throw_error(env, nullptr, "cannot be coerced to int64, value is too large");
        return -1;
    }
    return static_cast<KLong>(ptr64);
}

napi_value MakeString(napi_env env, const KStringPtr &value)
{
    napi_value result;
    napi_status status = napi_create_string_utf8(env, value.IsNull() ? "" : value.Data(), value.Length(), &result);
    TS_NAPI_THROW_IF_FAILED(env, status, result);
    return result;
}

napi_value MakeString(napi_env env, const std::string &value)
{
    napi_value result;
    napi_status status = napi_create_string_utf8(env, value.c_str(), value.length(), &result);
    TS_NAPI_THROW_IF_FAILED(env, status, result);
    return result;
}

napi_value MakeBoolean(napi_env env, int8_t value)
{
    napi_value result;
    napi_status status = napi_get_boolean(env, value != 0, &result);
    TS_NAPI_THROW_IF_FAILED(env, status, result);
    return result;
}

napi_value MakeInt32(napi_env env, int32_t value)
{
    napi_value result;
    napi_status status = napi_create_int32(env, value, &result);
    TS_NAPI_THROW_IF_FAILED(env, status, result);
    return result;
}

napi_value MakeUInt32(napi_env env, uint32_t value)
{
    napi_value result;
    napi_status status = napi_create_uint32(env, value, &result);
    TS_NAPI_THROW_IF_FAILED(env, status, result);
    return result;
}

napi_value MakeFloat32(napi_env env, float value)
{
    napi_value result;
    napi_status status = napi_create_double(env, value, &result);
    TS_NAPI_THROW_IF_FAILED(env, status, result);
    return result;
}

napi_value MakePointer(napi_env env, void *value)
{
    napi_value result;
    napi_status status =
        napi_create_bigint_uint64(env, static_cast<uint64_t>(reinterpret_cast<uintptr_t>(value)), &result);
    TS_NAPI_THROW_IF_FAILED(env, status, result);
    return result;
}

napi_value MakeVoid(napi_env env)
{
    napi_value result;
    napi_status status = napi_get_undefined(env, &result);
    TS_NAPI_THROW_IF_FAILED(env, status, result);
    return result;
}

napi_value MakeObject(napi_env env, [[maybe_unused]] napi_value object)
{
    napi_value result;
    napi_status status = napi_create_object(env, &result);
    TS_NAPI_THROW_IF_FAILED(env, status, result);
    return result;
}

#if _MSC_VER >= 1932  // Visual Studio 2022 version 17.2+
#pragma comment(linker, "/alternatename:__imp___std_init_once_complete=__imp_InitOnceComplete")
#pragma comment(linker, "/alternatename:__imp___std_init_once_begin_initialize=__imp_InitOnceBeginInitialize")
#endif

Exports *Exports::GetInstance()
{
    static Exports *instance = nullptr;
    if (instance == nullptr) {
        instance = new Exports();
    }
    return instance;
}

std::vector<std::string> Exports::GetModules()
{
    std::vector<std::string> result;
    for (auto &it : implementations_) {
        result.push_back(it.first);
    }
    return result;
}

void Exports::addMethod(const char *module, const char *name, NapiTypeT impl)
{
    auto it = implementations_.find(module);
    if (it == implementations_.end()) {
        it = implementations_.insert(std::make_pair(module, std::vector<std::pair<std::string, NapiTypeT>>())).first;
    }
    it->second.emplace_back(std::make_pair(name, impl));
}

const std::vector<std::pair<std::string, NapiTypeT>> &Exports::GetMethods(const std::string &module)
{
    auto it = implementations_.find(module);
    if (it == implementations_.end()) {
        LogE("Module", module.c_str(), "is not registered");
        throw std::runtime_error("Fatal error");
    }
    return it->second;
}

//
// Callback dispatcher
//
// NOTE(khil): Should we get rid of explicit Node_* declrations and hide the naming convention behind the macro
// definitions?

static napi_ref g_koalaNapiCallbackDispatcher = nullptr;

// NOTE(khil): shall we pass name in globalThis instead of object reference?
napi_value Node_SetCallbackDispatcher(napi_env env, napi_callback_info cbinfo)
{
    CallbackInfo info(env, cbinfo);
    napi_value dispatcher = info[0];
    napi_value result = MakeVoid(env);
    napi_status status = napi_create_reference(env, dispatcher, 1, &g_koalaNapiCallbackDispatcher);
    TS_NAPI_THROW_IF_FAILED(env, status, result);

    return result;
}
MAKE_NODE_EXPORT(TS_INTEROP_MODULE, SetCallbackDispatcher)

napi_value Node_CleanCallbackDispatcher(napi_env env, [[maybe_unused]] napi_callback_info cbinfo)
{
    napi_value result = MakeVoid(env);
    if (g_koalaNapiCallbackDispatcher != nullptr) {
        napi_status status = napi_delete_reference(env, g_koalaNapiCallbackDispatcher);
        g_koalaNapiCallbackDispatcher = nullptr;
        TS_NAPI_THROW_IF_FAILED(env, status, result);
    }
    return result;
}
MAKE_NODE_EXPORT(TS_INTEROP_MODULE, CleanCallbackDispatcher)

napi_value GetKoalaNapiCallbackDispatcher(napi_env env)
{
    if (g_koalaNapiCallbackDispatcher == nullptr) {
        abort();
    }
    napi_value value;
    napi_status status = napi_get_reference_value(env, g_koalaNapiCallbackDispatcher, &value);
    TS_NAPI_THROW_IF_FAILED(env, status, MakeVoid(env));
    return value;
}

// Module initialization
using ModuleRegisterCallback = napi_value (*)(napi_env env, napi_value exports);

/**
 * Sets a new callback and returns its previous value.
 */
ModuleRegisterCallback ProvideModuleRegisterCallback(ModuleRegisterCallback value = nullptr)
{
    static const ModuleRegisterCallback DEFAULT_CB = []([[maybe_unused]] napi_env env, napi_value exports) {
        return exports;
    };
    static ModuleRegisterCallback curCallback = DEFAULT_CB;

    ModuleRegisterCallback prevCallback = curCallback;
    curCallback = value != nullptr ? value : DEFAULT_CB;
    return prevCallback;
}

static constexpr bool SPLIT_MODULES = true;

static napi_value InitModule(napi_env env, napi_value exports)
{
    Exports *inst = Exports::GetInstance();
    napi_status status;
    napi_value target = exports;
    for (const auto &module : inst->GetModules()) {
        if (SPLIT_MODULES) {
            status = napi_create_object(env, &target);
            TS_NAPI_THROW_IF_FAILED(env, status, exports);
            status = napi_set_named_property(env, exports, module.c_str(), target);
            TS_NAPI_THROW_IF_FAILED(env, status, exports);
        }

        for (const auto &impl : inst->GetMethods(module)) {
            napi_value implFunc;
            status = napi_create_function(env, impl.first.c_str(), 0, impl.second, nullptr, &implFunc);
            TS_NAPI_THROW_IF_FAILED(env, status, exports);
            status = napi_set_named_property(env, target, impl.first.c_str(), implFunc);
            TS_NAPI_THROW_IF_FAILED(env, status, exports);
        }
    }
    return ProvideModuleRegisterCallback()(env, exports);
}

NAPI_MODULE(INTEROP_LIBRARY_NAME, InitModule)