// Copyright 2020 The Tint Authors.
//
// 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 "src/writer/spirv/spv_dump.h"

#include "spirv-tools/libspirv.hpp"
#include "src/writer/spirv/binary_writer.h"

namespace tint {
namespace writer {
namespace spirv {
namespace {

std::string Disassemble(const std::vector<uint32_t>& data) {
  std::string spv_errors;
  spv_target_env target_env = SPV_ENV_UNIVERSAL_1_0;

  auto msg_consumer = [&spv_errors](spv_message_level_t level, const char*,
                                    const spv_position_t& position,
                                    const char* message) {
    switch (level) {
      case SPV_MSG_FATAL:
      case SPV_MSG_INTERNAL_ERROR:
      case SPV_MSG_ERROR:
        spv_errors += "error: line " + std::to_string(position.index) + ": " +
                      message + "\n";
        break;
      case SPV_MSG_WARNING:
        spv_errors += "warning: line " + std::to_string(position.index) + ": " +
                      message + "\n";
        break;
      case SPV_MSG_INFO:
        spv_errors += "info: line " + std::to_string(position.index) + ": " +
                      message + "\n";
        break;
      case SPV_MSG_DEBUG:
        break;
    }
  };

  spvtools::SpirvTools tools(target_env);
  tools.SetMessageConsumer(msg_consumer);

  std::string result;
  if (!tools.Disassemble(data, &result, SPV_BINARY_TO_TEXT_OPTION_NO_HEADER)) {
    return "*** Invalid SPIR-V ***\n" + spv_errors;
  }
  return result;
}

}  // namespace

std::string DumpBuilder(Builder& builder) {
  BinaryWriter writer;
  writer.WriteHeader(builder.id_bound());
  writer.WriteBuilder(&builder);
  return Disassemble(writer.result());
}

std::string DumpInstruction(const Instruction& inst) {
  BinaryWriter writer;
  writer.WriteHeader(kDefaultMaxIdBound);
  writer.WriteInstruction(inst);
  return Disassemble(writer.result());
}

std::string DumpInstructions(const InstructionList& insts) {
  BinaryWriter writer;
  writer.WriteHeader(kDefaultMaxIdBound);
  for (const auto& inst : insts) {
    writer.WriteInstruction(inst);
  }
  return Disassemble(writer.result());
}

}  // namespace spirv
}  // namespace writer
}  // namespace tint