// MIT License
//
// Copyright (c) 2023 Advanced Micro Devices, Inc. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//
// undefine NDEBUG so asserts are implemented
#ifdef NDEBUG
#    undef NDEBUG
#endif

/**
 * @file samples/advanced_thread_trace/client.cpp
 *
 * @brief Example rocprofiler client (tool)
 */

#include <rocprofiler-sdk/amd_detail/thread_trace.h>
#include <rocprofiler-sdk/buffer.h>
#include <rocprofiler-sdk/callback_tracing.h>
#include <rocprofiler-sdk/fwd.h>
#include <rocprofiler-sdk/registration.h>
#include <rocprofiler-sdk/rocprofiler.h>
#include <rocprofiler-sdk/amd_detail/rocprofiler-sdk-codeobj/code_printing.hpp>
#include <shared_mutex>

#include "common/defines.hpp"
#include "common/filesystem.hpp"

#include <cxxabi.h>
#include <atomic>
#include <cassert>
#include <chrono>
#include <cstddef>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <fstream>
#include <functional>
#include <iomanip>
#include <iostream>
#include <map>
#include <mutex>
#include <regex>
#include <string>
#include <string_view>
#include <thread>
#include <unordered_map>
#include <vector>

#define OUTPUT_OFSTREAM "advanced_thread_trace.log"
#define TARGET_CU       1
#define SIMD_SELECT     0x3
#define BUFFER_SIZE     0x6000000
#define SE_MASK         0x11
constexpr bool COPY_MEMORY_CODEOBJ = true;

#define C_API_BEGIN                                                                                \
    try                                                                                            \
    {
#define C_API_END                                                                                  \
    }                                                                                              \
    catch(std::exception & e)                                                                      \
    {                                                                                              \
        std::cerr << "Error in " << __FILE__ << ':' << __LINE__ << ' ' << e.what() << std::endl;   \
    }                                                                                              \
    catch(...) { std::cerr << "Error in " << __FILE__ << ':' << __LINE__ << std::endl; }

struct pcinfo_t
{
    uint64_t marker_id;
    uint64_t addr;
};

bool
operator==(const pcinfo_t& a, const pcinfo_t& b)
{
    return a.addr == b.addr && a.marker_id == b.marker_id;
};

bool
operator<(const pcinfo_t& a, const pcinfo_t& b)
{
    if(a.marker_id == b.marker_id) return a.addr < b.addr;
    return a.marker_id < b.marker_id;
};

namespace client
{
using code_obj_load_data_t = rocprofiler_callback_tracing_code_object_load_data_t;
using kernel_symbol_data_t = rocprofiler_callback_tracing_code_object_kernel_symbol_register_data_t;

using Instruction             = rocprofiler::codeobj::disassembly::Instruction;
using CodeobjAddressTranslate = rocprofiler::codeobj::disassembly::CodeobjAddressTranslate;
using SymbolInfo              = rocprofiler::codeobj::disassembly::SymbolInfo;

rocprofiler_client_id_t* client_id  = nullptr;
rocprofiler_context_id_t client_ctx = {};

struct isa_map_elem_t
{
    std::atomic<size_t>          hitcount{0};
    std::atomic<size_t>          latency{0};
    std::unique_ptr<Instruction> code_line{nullptr};
};

struct ToolData
{
    ToolData()
    {
        try
        {
            output_file.open(OUTPUT_OFSTREAM);
        } catch(...)
        {}

        if(output_file.is_open())
            std::cout << "Writing code-object-isa-decode log to: " << OUTPUT_OFSTREAM << std::endl;
        else
            std::cout << "Could not open log file: " << OUTPUT_OFSTREAM << ", writing to stdout\n";
    };

    std::shared_mutex                                   isa_map_mut;
    std::mutex                                          output_mut;
    CodeobjAddressTranslate                             codeobjTranslate;
    std::map<pcinfo_t, std::unique_ptr<isa_map_elem_t>> isa_map;
    std::unordered_map<uint64_t, SymbolInfo>            kernels_in_codeobj       = {};
    std::unordered_map<uint64_t, std::string>           kernel_id_to_kernel_name = {};
    int                                                 num_waves                = 0;

    std::ostream& output()
    {
        if(output_file.is_open())
            return output_file;
        else
            return std::cout;
    }

    std::stringstream printKernel(uint64_t vaddr)
    {
        std::stringstream ss;
        try
        {
            ss << '\n' << std::hex;
            SymbolInfo& info = kernels_in_codeobj.at(vaddr);

            ss << std::hex << "Found: " << info.name << " at addr: 0x" << vaddr << " with offset 0x"
               << info.faddr << " vaddr 0x" << info.vaddr << std::dec << '\n';
        } catch(std::exception& e)
        {
            ss << e.what() << '\n';
        }
        return ss;
    }

private:
    std::ofstream output_file;
};

struct source_location
{
    std::string function = {};
    std::string file     = {};
    uint32_t    line     = 0;
    std::string context  = {};
};

struct trace_data_t
{
    int64_t  id;
    uint8_t* data;
    uint64_t size;
};

auto* tool = new ToolData{};

void
tool_codeobj_tracing_callback(rocprofiler_callback_tracing_record_t record,
                              rocprofiler_user_data_t* /* user_data */,
                              void* /* callback_data */)
{
    C_API_BEGIN
    if(record.kind != ROCPROFILER_CALLBACK_TRACING_CODE_OBJECT) return;
    if(record.phase != ROCPROFILER_CALLBACK_PHASE_LOAD) return;

    if(record.operation == ROCPROFILER_CODE_OBJECT_DEVICE_KERNEL_SYMBOL_REGISTER)
    {
        std::unique_lock<std::shared_mutex> lg(tool->isa_map_mut);
        auto* data = static_cast<kernel_symbol_data_t*>(record.payload);
        tool->kernel_id_to_kernel_name.emplace(data->kernel_id, data->kernel_name);
    }

    if(record.operation != ROCPROFILER_CODE_OBJECT_LOAD) return;

    std::unique_lock<std::shared_mutex> lg(tool->isa_map_mut);
    auto*                               data = static_cast<code_obj_load_data_t*>(record.payload);

    if(std::string_view(data->uri).find("file:///") == 0)
    {
        tool->codeobjTranslate.addDecoder(
            data->uri, data->code_object_id, data->load_delta, data->load_size);
        auto symbolmap = tool->codeobjTranslate.getSymbolMap(data->code_object_id);
        for(auto& [vaddr, symbol] : symbolmap)
            tool->kernels_in_codeobj[vaddr] = symbol;
    }
    else if(COPY_MEMORY_CODEOBJ)
    {
        tool->codeobjTranslate.addDecoder(reinterpret_cast<const void*>(data->memory_base),
                                          data->memory_size,
                                          data->code_object_id,
                                          data->load_delta,
                                          data->load_size);
        auto symbolmap = tool->codeobjTranslate.getSymbolMap(data->code_object_id);
        for(auto& [vaddr, symbol] : symbolmap)
            tool->kernels_in_codeobj[vaddr] = symbol;
    }
    C_API_END
}

rocprofiler_att_control_flags_t
dispatch_callback(rocprofiler_queue_id_t /* queue_id  */,
                  const rocprofiler_agent_t* /* agent  */,
                  rocprofiler_correlation_id_t /* correlation_id  */,
                  rocprofiler_kernel_id_t kernel_id,
                  rocprofiler_dispatch_id_t /* dispatch_id */,
                  rocprofiler_user_data_t* /* userdata */,
                  void* /* userdata */)
{
    C_API_BEGIN

    std::shared_lock<std::shared_mutex> lg(tool->isa_map_mut);

    static std::atomic<int> call_id{0};
    static std::string_view desired_func_name = "transposeLds";

    try
    {
        auto& kernel_name = tool->kernel_id_to_kernel_name.at(kernel_id);
        if(kernel_name.find(desired_func_name) == std::string::npos)
            return ROCPROFILER_ATT_CONTROL_NONE;

        int id = call_id.fetch_add(1);
        if(id == 1) return ROCPROFILER_ATT_CONTROL_START_AND_STOP;
    } catch(...)
    {
        std::cerr << "Could not find kernel id: " << kernel_id << std::endl;
    }

    C_API_END
    return ROCPROFILER_ATT_CONTROL_NONE;
}

void
get_trace_data(rocprofiler_att_parser_data_type_t type, void* att_data, void* userdata)
{
    C_API_BEGIN
    assert(userdata && "ISA callback passed null!");

    std::shared_lock<std::shared_mutex> shared_lock(tool->isa_map_mut);

    if(type == ROCPROFILER_ATT_PARSER_DATA_TYPE_OCCUPANCY) tool->num_waves++;

    if(type != ROCPROFILER_ATT_PARSER_DATA_TYPE_ISA) return;

    auto& event = *reinterpret_cast<rocprofiler_att_data_type_isa_t*>(att_data);

    pcinfo_t pc{event.marker_id, event.offset};
    auto     it = tool->isa_map.find(pc);
    if(it == tool->isa_map.end())
    {
        shared_lock.unlock();
        {
            std::unique_lock<std::shared_mutex> unique_lock(tool->isa_map_mut);
            auto                                ptr = std::make_unique<isa_map_elem_t>();
            try
            {
                ptr->code_line = tool->codeobjTranslate.get(pc.marker_id, pc.addr);
            } catch(std::exception& e)
            {
                std::cerr << pc.marker_id << ":" << pc.addr << ' ' << e.what() << std::endl;
                return;
            } catch(...)
            {
                std::cerr << "Could not fetch: " << pc.marker_id << ':' << pc.addr << std::endl;
                return;
            }
            it = tool->isa_map.emplace(pc, std::move(ptr)).first;
        }
        shared_lock.lock();
    }

    it->second->hitcount.fetch_add(event.hitcount, std::memory_order_relaxed);
    it->second->latency.fetch_add(event.latency, std::memory_order_relaxed);
    C_API_END
}

uint64_t
copy_trace_data(int* seid, uint8_t** buffer, uint64_t* buffer_size, void* userdata)
{
    trace_data_t& data = *reinterpret_cast<trace_data_t*>(userdata);
    *seid              = data.id;
    *buffer_size       = data.size;
    *buffer            = data.data;
    data.size          = 0;
    return *buffer_size;
}

rocprofiler_status_t
isa_callback(char*     isa_instruction,
             uint64_t* isa_memory_size,
             uint64_t* isa_size,
             uint64_t  marker_id,
             uint64_t  offset,
             void*     userdata)
{
    C_API_BEGIN
    assert(userdata && "ISA callback passed null!");

    std::unique_ptr<Instruction> instruction;

    {
        std::unique_lock<std::shared_mutex> unique_lock(tool->isa_map_mut);
        instruction = tool->codeobjTranslate.get(marker_id, offset);
    }

    if(!instruction.get()) return ROCPROFILER_STATUS_ERROR_INVALID_ARGUMENT;

    {
        size_t tmp_isa_size = *isa_size;
        *isa_size           = instruction->inst.size();

        if(*isa_size > tmp_isa_size) return ROCPROFILER_STATUS_ERROR_OUT_OF_RESOURCES;
    }

    memcpy(isa_instruction, instruction->inst.data(), *isa_size);
    *isa_memory_size = instruction->size;

    auto ptr       = std::make_unique<isa_map_elem_t>();
    ptr->code_line = std::move(instruction);
    tool->isa_map.emplace(pcinfo_t{marker_id, offset}, std::move(ptr));
    return ROCPROFILER_STATUS_SUCCESS;
    C_API_END
    return ROCPROFILER_STATUS_ERROR;
}

void
shader_data_callback(int64_t se_id,
                     void*   se_data,
                     size_t  data_size,
                     rocprofiler_user_data_t /* userdata */)
{
    C_API_BEGIN

    {
        std::unique_lock<std::mutex> lk(tool->output_mut);
        tool->output() << "SE ID: " << se_id << " with size " << data_size << std::hex << '\n';
    }
    trace_data_t data{.id = se_id, .data = (uint8_t*) se_data, .size = data_size};
    auto status = rocprofiler_att_parse_data(copy_trace_data, get_trace_data, isa_callback, &data);
    if(status != ROCPROFILER_STATUS_SUCCESS)
        std::cerr << "shader_data_callback failed with status " << status << std::endl;
    C_API_END
}

int
tool_init(rocprofiler_client_finalize_t fini_func, void* tool_data)
{
    (void) fini_func;
    ROCPROFILER_CALL(rocprofiler_create_context(&client_ctx), "context creation");

    ROCPROFILER_CALL(
        rocprofiler_configure_callback_tracing_service(client_ctx,
                                                       ROCPROFILER_CALLBACK_TRACING_CODE_OBJECT,
                                                       nullptr,
                                                       0,
                                                       tool_codeobj_tracing_callback,
                                                       tool_data),
        "code object tracing service configure");

    std::vector<rocprofiler_att_parameter_t> parameters = {
        {ROCPROFILER_ATT_PARAMETER_TARGET_CU, {TARGET_CU}},
        {ROCPROFILER_ATT_PARAMETER_SIMD_SELECT, {SIMD_SELECT}},
        {ROCPROFILER_ATT_PARAMETER_BUFFER_SIZE, {BUFFER_SIZE}},
        {ROCPROFILER_ATT_PARAMETER_SHADER_ENGINE_MASK, {SE_MASK}}};

    ROCPROFILER_CALL(rocprofiler_configure_dispatch_thread_trace_service(client_ctx,
                                                                         parameters.data(),
                                                                         parameters.size(),
                                                                         dispatch_callback,
                                                                         shader_data_callback,
                                                                         tool_data),
                     "thread trace service configure");

    int valid_ctx = 0;
    ROCPROFILER_CALL(rocprofiler_context_is_valid(client_ctx, &valid_ctx),
                     "context validity check");
    if(valid_ctx == 0)
    {
        // notify rocprofiler that initialization failed
        // and all the contexts, buffers, etc. created
        // should be ignored
        return -1;
    }

    ROCPROFILER_CALL(rocprofiler_start_context(client_ctx), "context start");

    // no errors
    return 0;
}

void
tool_fini(void* /* data */)
{
    std::unique_lock<std::shared_mutex> isa_lk(client::tool->isa_map_mut);
    std::unique_lock<std::mutex>        out_lk(client::tool->output_mut);

    // Find largest instruction
    size_t max_inst_size = 0;
    for(auto& [addr, lines] : client::tool->isa_map)
        if(lines.get()) max_inst_size = std::max(max_inst_size, lines->code_line->inst.size());

    std::string empty_space;
    empty_space.resize(max_inst_size, ' ');

    size_t vmc_latency    = 0;
    size_t lgk_latency    = 0;
    size_t scalar_latency = 0;
    size_t vector_latency = 0;
    size_t other_latency  = 0;

    size_t scalar_exec = 0;
    size_t vector_exec = 0;
    size_t other_exec  = 0;

    for(auto& [addr, line] : client::tool->isa_map)
        if(line.get())
        {
            size_t hitcount  = line->hitcount.load(std::memory_order_relaxed);
            size_t latency   = line->latency.load(std::memory_order_relaxed);
            auto&  code_line = line->code_line->inst;

            client::tool->output() << std::hex << "0x" << addr.addr << std::dec << ' ' << code_line
                                   << empty_space.substr(0, max_inst_size - code_line.size())
                                   << " Hit: " << hitcount << " - Latency: " << latency << '\n';

            if(code_line.find("s_waitcnt") == 0)
            {
                other_exec += hitcount;
                if(code_line.find("lgkmcnt") != std::string::npos)
                    lgk_latency += latency;
                else
                    vmc_latency += latency;
            }
            else if(code_line.find("v_") == 0)
            {
                vector_exec += hitcount;
                vector_latency += latency;
            }
            else if(code_line.find("s_") == 0)
            {
                scalar_exec += hitcount;
                scalar_latency += latency;
            }
            else
            {
                other_exec += hitcount;
                other_latency += latency;
            }
        }

    size_t total_exec     = vector_exec + scalar_exec + other_exec;
    size_t memory_latency = vmc_latency + lgk_latency;
    size_t total_latency  = memory_latency + vector_latency + scalar_latency + other_latency;
    float  vmc_fraction   = 100 * vmc_latency / float(total_latency);
    float  lgk_fraction   = 100 * lgk_latency / float(total_latency);

    client::tool->output() << "Total executed instructions: " << total_exec << '\n'
                           << "Total executed vector instructions: " << vector_exec
                           << " with average " << vector_latency / float(vector_exec)
                           << " cycles.\n"
                           << "Total executed scalar instructions: " << scalar_exec
                           << " with average " << scalar_latency / float(scalar_exec)
                           << " cycles.\n"
                           << "Vector memory ops occupied: " << vmc_fraction << "% of cycles.\n"
                           << "Scalar and LDS memory ops occupied: " << lgk_fraction
                           << "% of cycles.\n"
                           << "Num waves created: " << (client::tool->num_waves / 2) << std::endl;
}

}  // namespace client

extern "C" rocprofiler_tool_configure_result_t*
rocprofiler_configure(uint32_t                 version,
                      const char*              runtime_version,
                      uint32_t                 priority,
                      rocprofiler_client_id_t* id)
{
    // set the client name
    id->name = "Adv_Thread_Trace_Sample";

    // store client info
    client::client_id = id;

    // compute major/minor/patch version info
    uint32_t major = version / 10000;
    uint32_t minor = (version % 10000) / 100;
    uint32_t patch = version % 100;

    // generate info string
    auto info = std::stringstream{};
    info << id->name << " (priority=" << priority << ") is using rocprofiler-sdk v" << major << "."
         << minor << "." << patch << " (" << runtime_version << ")";

    std::clog << info.str() << std::endl;

    // create configure data
    static auto cfg =
        rocprofiler_tool_configure_result_t{sizeof(rocprofiler_tool_configure_result_t),
                                            &client::tool_init,
                                            &client::tool_fini,
                                            nullptr};

    // return pointer to configure data
    return &cfg;
}