// Copyright 2021 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/tint/val/val.h"

#include "src/tint/ast/module.h"
#include "src/tint/program.h"
#include "src/tint/utils/io/command.h"
#include "src/tint/utils/io/tmpfile.h"

namespace tint {
namespace val {

Result Msl(const std::string& xcrun_path, const std::string& source) {
  Result result;

  auto xcrun = utils::Command(xcrun_path);
  if (!xcrun.Found()) {
    result.output = "xcrun not found at '" + std::string(xcrun_path) + "'";
    result.failed = true;
    return result;
  }

  utils::TmpFile file(".metal");
  file << source;

#ifdef _WIN32
  // On Windows, we should actually be running metal.exe from the Metal
  // Developer Tools for Windows
  auto res = xcrun("-x", "metal",        //
                   "-o", "NUL",          //
                   "-std=osx-metal1.2",  //
                   "-c", file.Path());
#else
  auto res = xcrun("-sdk", "macosx", "metal",  //
                   "-o", "/dev/null",          //
                   "-std=osx-metal1.2",        //
                   "-c", file.Path());
#endif
  if (!res.out.empty()) {
    if (!result.output.empty()) {
      result.output += "\n";
    }
    result.output += res.out;
  }
  if (!res.err.empty()) {
    if (!result.output.empty()) {
      result.output += "\n";
    }
    result.output += res.err;
  }
  result.failed = (res.error_code != 0);

  return result;
}

}  // namespace val
}  // namespace tint