#!/usr/bin/env python
# Copyright (c) 2017, the R8 project authors. Please see the AUTHORS file
# for details. All rights reserved. Use of this source code is governed by a
# BSD-style license that can be found in the LICENSE file.

# Run D8 or DX on 'third_party/framework/framework_<version>.jar'.
# Report Golem-compatible CodeSize and RunTimeRaw values:
#
#     <NAME>-Total(CodeSize): <size>
#     <NAME>-Total(RunTimeRaw>: <time> ms
#
# and also detailed segment sizes for each dex segment:
#
#    <NAME>-Code(CodeSize): <size>
#    <NAME>-AnnotationSets(CodeSize): <size>
#    ...
#
# Uses the DexSegment Java tool (Gradle target).

from __future__ import print_function
from glob import glob
import argparse
import os
import re
import subprocess
import sys
import time

import utils

DX_JAR = os.path.join(utils.REPO_ROOT, 'tools', 'linux', 'dx', 'framework',
    'dx.jar')
D8_JAR = os.path.join(utils.REPO_ROOT, 'build', 'libs', 'd8.jar')
FRAMEWORK_JAR = os.path.join('third_party', 'framework',
    'framework_160115954.jar')
DEX_SEGMENTS_JAR = os.path.join(utils.REPO_ROOT, 'build', 'libs',
    'dexsegments.jar')
DEX_SEGMENTS_RESULT_PATTERN = re.compile('- ([^:]+): ([0-9]+)')
MIN_SDK_VERSION = '24'

def parse_arguments():
  parser = argparse.ArgumentParser(
      description = 'Run D8 or DX on third_party/framework/framework*.jar.'
          ' Report Golem-compatible CodeSize and RunTimeRaw values.')
  parser.add_argument('--tool',
      choices = ['dx', 'd8', 'd8-release'],
      required = True,
      help = 'Compiler tool to use.')
  parser.add_argument('--name',
      required = True,
      help = 'Results will be printed using the specified benchmark name (e.g.'
          ' <NAME>-<segment>(CodeSize): <bytes>)')
  return parser.parse_args()

# Return a dictionary: {segment_name -> segments_size}
def getDexSegmentSizes(dex_files):
  assert len(dex_files) > 0
  cmd = ['java', '-jar', DEX_SEGMENTS_JAR]
  cmd.extend(dex_files)
  utils.PrintCmd(cmd)
  output = subprocess.check_output(cmd)

  matches = DEX_SEGMENTS_RESULT_PATTERN.findall(output)

  if matches is None or len(matches) == 0:
    raise Exception('DexSegments failed to return any output for' \
        ' these files: {}'.format(dex_files))

  result = {}

  for match in matches:
    result[match[0]] = int(match[1])

  return result

def Main():
  args = parse_arguments()

  with utils.TempDir() as temp_dir:
    if args.tool == 'dx':
      jar_file = DX_JAR
      jar_args = ['--output=' + temp_dir, '--multi-dex',
          '--min-sdk-version=' + MIN_SDK_VERSION, '--dex']
    else:
      jar_file = D8_JAR
      jar_args = ['--output', temp_dir, '--min-sdk-version', MIN_SDK_VERSION]
      if args.tool == 'd8-release':
        jar_args.append('--release')

    cmd = ['java', '-jar', jar_file] + jar_args + [FRAMEWORK_JAR]

    utils.PrintCmd(cmd)

    t0 = time.time()
    subprocess.check_call(cmd)
    dt = time.time() - t0

    dex_files = [f for f in glob(os.path.join(temp_dir, '*.dex'))]
    code_size = 0
    for dex_file in dex_files:
      code_size += os.path.getsize(dex_file)

    print('{}-Total(RunTimeRaw): {} ms'
      .format(args.name, 1000.0 * dt))

    print('{}-Total(CodeSize): {}'
      .format(args.name, code_size))

    for segment_name, size in getDexSegmentSizes(dex_files).items():
      print('{}-{}(CodeSize): {}'
          .format(args.name, segment_name, size))

if __name__ == '__main__':
  sys.exit(Main())