/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * 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 <string.h>

#include <string>
#include <vector>

#include <android-base/logging.h>

#include "command.h"
#include "utils.h"

constexpr int SIMPLEPERF_VERSION = 1;

int main(int argc, char** argv) {
  android::base::InitLogging(argv, android::base::StderrLogger);
  std::vector<std::string> args;
  android::base::LogSeverity log_severity = android::base::INFO;

  for (int i = 1; i < argc; ++i) {
    if (strcmp(argv[i], "--help") == 0 || strcmp(argv[i], "-h") == 0) {
      args.insert(args.begin(), "help");
    } else if (strcmp(argv[i], "--log") == 0) {
      if (i + 1 < argc) {
        ++i;
        if (!GetLogSeverity(argv[i], &log_severity)) {
          LOG(ERROR) << "Unknown log severity: " << argv[i];
          return 1;
        }
      } else {
        LOG(ERROR) << "Missing argument for --log option.\n";
        return 1;
      }
    } else if (strcmp(argv[i], "--version") == 0) {
      LOG(INFO) << "Simpleperf version " << SIMPLEPERF_VERSION << ", revision "
                << SIMPLEPERF_REVISION;
      return 0;
    } else {
      args.push_back(argv[i]);
    }
  }
  android::base::ScopedLogSeverity severity(log_severity);

  if (args.empty()) {
    args.push_back("help");
  }
  std::unique_ptr<Command> command = CreateCommandInstance(args[0]);
  if (command == nullptr) {
    LOG(ERROR) << "malformed command line: unknown command " << args[0];
    return 1;
  }
  std::string command_name = args[0];
  args.erase(args.begin());

  LOG(DEBUG) << "command '" << command_name << "' starts running";
  bool result = command->Run(args);
  LOG(DEBUG) << "command '" << command_name << "' "
             << (result ? "finished successfully" : "failed");
  return result ? 0 : 1;
}