#!/usr/bin/env python

# Copyright 2017 The Crashpad Authors. All rights reserved.
#
# 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.

import argparse
import glob
import gyp_crashpad
import os
import re
import subprocess
import sys


def main(args):
    parser = argparse.ArgumentParser(
        description='Set up an Android cross build',
        epilog='Additional arguments will be passed to gyp_crashpad.py.')
    parser.add_argument('--arch', required=True, help='Target architecture')
    parser.add_argument('--api-level', required=True, help='Target API level')
    parser.add_argument('--ndk', required=True, help='Standalone NDK toolchain')
    (parsed, extra_command_line_args) = parser.parse_known_args(args)

    SYS_PLATFORM_TO_NDK_HOST_ARCH = {
        'cygwin': 'windows-x86_64',
        'darwin': 'darwin-x86_64',
        'linux': 'linux-x86_64',
        'linux2': 'linux-x86_64',
        'darwin': 'darwin-x86_64',
        'win32': 'windows-x86_64',
    }

    ndk_host_arch = SYS_PLATFORM_TO_NDK_HOST_ARCH[sys.platform]

    ndk_bin_dir = os.path.join(parsed.ndk, 'toolchains', 'llvm', 'prebuilt',
                               ndk_host_arch, 'bin')
    if not os.path.exists(ndk_bin_dir):
        parser.error("missing toolchain")

    ARCH_TO_ARCH_TRIPLET = {
        'arm': 'armv7a-linux-androideabi',
        'arm64': 'aarch64-linux-android',
        'ia32': 'i686-linux-android',
        'x64': 'x86_64-linux-android',
    }

    clang_prefix = ARCH_TO_ARCH_TRIPLET[parsed.arch] + parsed.api_level
    os.environ['CC_target'] = os.path.join(ndk_bin_dir, clang_prefix + '-clang')
    os.environ['CXX_target'] = os.path.join(ndk_bin_dir,
                                            clang_prefix + '-clang++')

    extra_args = ['-D', 'android_api_level=' + parsed.api_level]

    # ARM only includes 'v7a' in the tool prefix for clang
    tool_prefix = ('arm-linux-androideabi' if parsed.arch == 'arm' else
                   ARCH_TO_ARCH_TRIPLET[parsed.arch])

    for tool in ('ar', 'nm', 'readelf'):
        os.environ['%s_target' % tool.upper()] = (os.path.join(
            ndk_bin_dir, '%s-%s' % (tool_prefix, tool)))

    return gyp_crashpad.main([
        '-D', 'OS=android', '-D',
        'target_arch=%s' % parsed.arch, '-D', 'clang=1', '-f', 'ninja-android'
    ] + extra_args + extra_command_line_args)


if __name__ == '__main__':
    sys.exit(main(sys.argv[1:]))