/**
 * Copyright (c) 2021-2022 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.
 */

#ifndef LIBPANDABASE_TRACE_TRACE_H
#define LIBPANDABASE_TRACE_TRACE_H

#include <cstdint>
#include <iosfwd>
#include <sstream>
#include <string>

#include "macros.h"

namespace panda::trace {

namespace internal {
extern int g_trace_marker_fd;
bool DoInit();
void DoBeginTracePoint(const char *str);
void DoEndTracePoint();
void DoIntTracePoint(const char *str, int32_t val);
void DoInt64TracePoint(const char *str, int64_t val);
}  // namespace internal

static inline bool IsEnabled()
{
    return internal::g_trace_marker_fd != -1;
}

static inline void BeginTracePoint(const char *str)
{
    if (UNLIKELY(IsEnabled())) {
        internal::DoBeginTracePoint(str);
    }
}

static inline void EndTracePoint()
{
    if (UNLIKELY(IsEnabled())) {
        internal::DoEndTracePoint();
    }
}

static inline void IntTracePoint(const char *str, int32_t val)
{
    if (UNLIKELY(IsEnabled())) {
        internal::DoIntTracePoint(str, val);
    }
}

static inline void Int64TracePoint(const char *str, int64_t val)
{
    if (UNLIKELY(IsEnabled())) {
        internal::DoInt64TracePoint(str, val);
    }
}

class ScopedTrace {
public:
    explicit ScopedTrace(const char *str)
    {
        BeginTracePoint(str);
    }
    explicit ScopedTrace(const std::string &str) : ScopedTrace(str.c_str()) {}

    ~ScopedTrace()
    {
        EndTracePoint();
    }

    NO_COPY_SEMANTIC(ScopedTrace);
    NO_MOVE_SEMANTIC(ScopedTrace);
};

namespace internal {
class ScopeTraceStremHelperBegin {
public:
    ScopeTraceStremHelperBegin() = default;
    ~ScopeTraceStremHelperBegin()
    {
        BeginTracePoint(message_buffer_.str().c_str());
    }

    std::ostream &GetStream()
    {
        return message_buffer_;
    }

    NO_COPY_SEMANTIC(ScopeTraceStremHelperBegin);
    NO_MOVE_SEMANTIC(ScopeTraceStremHelperBegin);

private:
    std::ostringstream message_buffer_;
};

class ScopeTraceStremHelperEnd {
public:
    ScopeTraceStremHelperEnd() = default;
    ~ScopeTraceStremHelperEnd()
    {
        EndTracePoint();
    }

    NO_COPY_SEMANTIC(ScopeTraceStremHelperEnd);
    NO_MOVE_SEMANTIC(ScopeTraceStremHelperEnd);
};
}  // namespace internal

// NOLINTNEXTLINE(cppcoreguidelines-macro-usage)
#define SCOPED_TRACE_STREAM                                                                    \
    ::panda::trace::internal::ScopeTraceStremHelperEnd MERGE_WORDS(end_trace_point, __LINE__); \
    UNLIKELY(::panda::trace::IsEnabled()) && ::panda::trace::internal::ScopeTraceStremHelperBegin().GetStream()

}  // namespace panda::trace

#endif  // LIBPANDABASE_TRACE_TRACE_H