/*
 * Copyright (c) 2021 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 "debugger_service.h"

#include "protocol_handler.h"

#include "ecmascript/debugger/js_debugger_manager.h"

namespace panda::ecmascript::tooling {
void InitializeDebugger(::panda::ecmascript::EcmaVM *vm,
                        const std::function<void(const void *, const std::string &)> &onResponse)
{
    if (vm == nullptr || vm->GetJsDebuggerManager() == nullptr) {
        LOG_DEBUGGER(DEBUG) << "VM has already been destroyed";
        return;
    }
    ProtocolHandler *handler = vm->GetJsDebuggerManager()->GetDebuggerHandler();
    if (handler != nullptr) {
        LOG_DEBUGGER(ERROR) << "JS debugger was initialized";
        return;
    }
    vm->GetJsDebuggerManager()->SetDebuggerHandler(new ProtocolHandler(onResponse, vm));
}

void UninitializeDebugger(::panda::ecmascript::EcmaVM *vm)
{
    if (vm == nullptr || vm->GetJsDebuggerManager() == nullptr) {
        LOG_DEBUGGER(DEBUG) << "VM has already been destroyed";
        return;
    }
    ProtocolHandler *handler = vm->GetJsDebuggerManager()->GetDebuggerHandler();
    delete handler;
    vm->GetJsDebuggerManager()->SetDebuggerHandler(nullptr);
}

void WaitForDebugger(const ::panda::ecmascript::EcmaVM *vm)
{
    if (vm == nullptr || vm->GetJsDebuggerManager() == nullptr) {
        LOG_DEBUGGER(DEBUG) << "VM has already been destroyed";
        return;
    }
    ProtocolHandler *handler = vm->GetJsDebuggerManager()->GetDebuggerHandler();
    if (LIKELY(handler != nullptr)) {
        handler->WaitForDebugger();
    }
}

void OnMessage(const ::panda::ecmascript::EcmaVM *vm, std::string &&message)
{
    if (vm == nullptr || vm->GetJsDebuggerManager() == nullptr) {
        LOG_DEBUGGER(DEBUG) << "VM has already been destroyed";
        return;
    }
    ProtocolHandler *handler = vm->GetJsDebuggerManager()->GetDebuggerHandler();
    if (LIKELY(handler != nullptr)) {
        handler->DispatchCommand(std::move(message));
    }
}

void ProcessMessage(const ::panda::ecmascript::EcmaVM *vm)
{
    if (vm == nullptr || vm->GetJsDebuggerManager() == nullptr) {
        LOG_DEBUGGER(DEBUG) << "VM has already been destroyed";
        return;
    }
    ProtocolHandler *handler = vm->GetJsDebuggerManager()->GetDebuggerHandler();
    if (LIKELY(handler != nullptr)) {
        handler->ProcessCommand();
    }
}

int32_t GetDispatchStatus(const ::panda::ecmascript::EcmaVM *vm)
{
    if (vm == nullptr || vm->GetJsDebuggerManager() == nullptr) {
        LOG_DEBUGGER(DEBUG) << "VM has already been destroyed";
        return ProtocolHandler::DispatchStatus::UNKNOWN;
    }
    ProtocolHandler *handler = vm->GetJsDebuggerManager()->GetDebuggerHandler();
    if (LIKELY(handler != nullptr)) {
        return handler->GetDispatchStatus();
    }
    return ProtocolHandler::DispatchStatus::UNKNOWN;
}

// strdup allocates memory; caller is responsible for freeing it
// Return the dynamically allocated string (must be freed by the caller)
const char* GetCallFrames(const ::panda::ecmascript::EcmaVM *vm)
{
    if (vm == nullptr || vm->GetJsDebuggerManager() == nullptr) {
        LOG_DEBUGGER(ERROR) << "VM has already been destroyed";
        return "";
    }
    ProtocolHandler *handler = vm->GetJsDebuggerManager()->GetDebuggerHandler();
    if (LIKELY(handler != nullptr)) {
        auto dispatcher = handler->GetDispatcher();
        if (LIKELY(dispatcher != nullptr)) {
            auto mixStack = dispatcher->GetJsFrames();
            const char* buffer = strdup(mixStack.c_str());
            return buffer;
        }
        return "";
    }
    return "";
}

const char* OperateDebugMessage(const ::panda::ecmascript::EcmaVM *vm, const char* message)
{
    if (vm == nullptr || vm->GetJsDebuggerManager() == nullptr) {
        LOG_DEBUGGER(ERROR) << "VM has already been destroyed";
        return "";
    }
    ProtocolHandler *handler = vm->GetJsDebuggerManager()->GetDebuggerHandler();
    if (LIKELY(handler != nullptr)) {
        auto dispatcher = handler->GetDispatcher();
        if (LIKELY(dispatcher != nullptr)) {
            auto info = dispatcher->OperateDebugMessage(message);
            const char* buffer = strdup(info.c_str());
            return buffer;
        }
        return "";
    }
    return "";
}
}  // namespace panda::ecmascript::tooling