#!/usr/bin/env python3
#
# Copyright 2013 The Flutter Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import argparse
import platform
import subprocess
import shutil
import sys
import os

from create_xcframework import create_xcframework  # pylint: disable=import-error

ARCH_SUBPATH = 'mac-arm64' if platform.processor() == 'arm' else 'mac-x64'
DSYMUTIL = os.path.join(
    os.path.dirname(__file__), '..', '..', '..', 'buildtools', ARCH_SUBPATH, 'clang', 'bin',
    'dsymutil'
)


def main():
  parser = argparse.ArgumentParser(description='Creates Flutter.framework and Flutter.xcframework')

  parser.add_argument('--dst', type=str, required=True)
  parser.add_argument('--arm64-out-dir', type=str, required=True)
  parser.add_argument('--armv7-out-dir', type=str, required=False)
  # TODO(gw280): Remove --simulator-out-dir alias when all recipes are updated
  parser.add_argument('--simulator-x64-out-dir', '--simulator-out-dir', type=str, required=True)
  parser.add_argument('--simulator-arm64-out-dir', type=str, required=False)
  parser.add_argument('--strip', action='store_true', default=False)
  parser.add_argument('--dsym', action='store_true', default=False)

  args = parser.parse_args()

  framework = os.path.join(args.dst, 'Flutter.framework')
  simulator_framework = os.path.join(args.dst, 'sim', 'Flutter.framework')
  arm64_framework = os.path.join(args.arm64_out_dir, 'Flutter.framework')
  simulator_x64_framework = os.path.join(args.simulator_x64_out_dir, 'Flutter.framework')
  if args.simulator_arm64_out_dir is not None:
    simulator_arm64_framework = os.path.join(args.simulator_arm64_out_dir, 'Flutter.framework')
    simulator_arm64_dylib = os.path.join(simulator_arm64_framework, 'Flutter')

  arm64_dylib = os.path.join(arm64_framework, 'Flutter')
  simulator_x64_dylib = os.path.join(simulator_x64_framework, 'Flutter')

  if not os.path.isdir(arm64_framework):
    print('Cannot find iOS arm64 Framework at %s' % arm64_framework)
    return 1

  if not os.path.isdir(simulator_x64_framework):
    print('Cannot find iOS x64 simulator Framework at %s' % simulator_framework)
    return 1

  if not os.path.isfile(arm64_dylib):
    print('Cannot find iOS arm64 dylib at %s' % arm64_dylib)
    return 1

  if not os.path.isfile(simulator_x64_dylib):
    print('Cannot find iOS simulator dylib at %s' % simulator_x64_dylib)
    return 1

  if not os.path.isfile(DSYMUTIL):
    print('Cannot find dsymutil at %s' % DSYMUTIL)
    return 1

  shutil.rmtree(framework, True)
  shutil.copytree(arm64_framework, framework)
  framework_binary = os.path.join(framework, 'Flutter')
  process_framework(args, framework, framework_binary)

  if args.simulator_arm64_out_dir is not None:
    shutil.rmtree(simulator_framework, True)
    shutil.copytree(simulator_arm64_framework, simulator_framework)

    simulator_framework_binary = os.path.join(simulator_framework, 'Flutter')

    # Create the arm64/x64 simulator fat framework.
    subprocess.check_call([
        'lipo', simulator_x64_dylib, simulator_arm64_dylib, '-create', '-output',
        simulator_framework_binary
    ])
    process_framework(args, simulator_framework, simulator_framework_binary)
  else:
    simulator_framework = simulator_x64_framework

  # Create XCFramework from the arm-only fat framework and the arm64/x64
  # simulator frameworks, or just the x64 simulator framework if only that one
  # exists.
  xcframeworks = [simulator_framework, framework]
  create_xcframework(location=args.dst, name='Flutter', frameworks=xcframeworks)

  # Add the x64 simulator into the fat framework
  subprocess.check_call([
      'lipo', arm64_dylib, simulator_x64_dylib, '-create', '-output', framework_binary
  ])

  process_framework(args, framework, framework_binary)
  return 0


def process_framework(args, framework, framework_binary):
  if args.dsym:
    dsym_out = os.path.splitext(framework)[0] + '.dSYM'
    subprocess.check_call([DSYMUTIL, '-o', dsym_out, framework_binary])

  if args.strip:
    # copy unstripped
    unstripped_out = os.path.join(args.dst, 'Flutter.unstripped')
    shutil.copyfile(framework_binary, unstripped_out)

    subprocess.check_call(['strip', '-x', '-S', framework_binary])


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