#!/usr/bin/env python3
import sys
import os
import errno
from shutil import copy2


def get_platform(out_dir):
    platform_file = open(out_dir + '/target.txt')
    content = platform_file.read()
    spl = content.find('-')
    return (content[:spl], content[spl + 1:])


def copy_headers(src_dir, dest_dir):
    for filename in os.listdir(src_dir):
        if filename.endswith(".h") and not filename.startswith("__"):
            copy2(os.path.join(src_dir, filename), dest_dir)
            continue
        else:
            continue


def mkdir_p(path):
    try:
        os.makedirs(path)
    except OSError as exc:
        if exc.errno == errno.EEXIST and os.path.isdir(path):
            pass
        else:
            raise


source_dir = sys.argv[1]
bin_dir = sys.argv[2]
sysroot_dir = sys.argv[3]
(machine, platform) = get_platform(bin_dir)

base_headers_path = '{}/photon/libc/include'.format(source_dir)
platform_headers_path = '{}/photon/libc/sys/{}'.format(source_dir, platform)
platform_sys_headers_path = '{}/photon/libc/sys/{}/sys'.format(source_dir, platform)
platform_sys_arch_headers_path = '{}/photon/libc/sys/{}/machine/{}'.format(source_dir, platform, machine)

machine_arch_headers_path = '{}/photon/libc/machine/{}'.format(source_dir, machine)
machine_generic_headers_path = '{}/photon/libc/include/machine'.format(source_dir)

mkdir_p(sysroot_dir + '/usr/include/sys')
mkdir_p(sysroot_dir + '/usr/include/machine')

copy_headers(base_headers_path, sysroot_dir + '/usr/include')
copy_headers(platform_headers_path, sysroot_dir + '/usr/include')
copy_headers(platform_sys_headers_path, sysroot_dir + '/usr/include/sys')
copy_headers(platform_sys_arch_headers_path, sysroot_dir + '/usr/include/sys')

#copy_headers(machine_arch_headers_path, sysroot_dir + '/usr/include/machine')
copy_headers(machine_generic_headers_path, sysroot_dir + '/usr/include/machine')