import os
import platform
import shutil

import subprocess
import threading


class Command(object):
    """Run system commands with timeout
    
    From http://www.bo-yang.net/2016/12/01/python-run-command-with-timeout
    Python3 might have a builtin way to do that.
    """
    def __init__(self, cmd):
        self.cmd = cmd
        self.process = None

    def run_command(self, capture = False):
        self.process = subprocess.Popen(self.cmd, shell=True)
        self.process.communicate()

    def run(self, timeout = 5 * 60):
        '''5 minutes default timeout'''
        thread = threading.Thread(target=self.run_command, args=())
        thread.start()
        thread.join(timeout)

        if thread.is_alive():
            print 'Command timeout, kill it: ' + self.cmd
            self.process.terminate()
            thread.join()
            return False, 255
        else:
            return True, self.process.returncode


osName = platform.system()
print('os name = {}'.format(osName))

root = os.path.dirname(os.path.realpath(__file__))
buildDir = os.path.join(root, 'build', osName)

if not os.path.exists(buildDir):
    os.makedirs(buildDir)

os.chdir(buildDir)

if osName == 'Windows':
    generator = '-G"NMake Makefiles"'
    make = 'nmake'
    testBinary ='ixwebsocket_unittest.exe'
else:
    generator = ''
    make = 'make -j6'
    testBinary ='./ixwebsocket_unittest'

sanitizersFlags = {
    'asan': '-DSANITIZE_ADDRESS=On',
    'ubsan': '-DSANITIZE_UNDEFINED=On',
    'tsan': '-DSANITIZE_THREAD=On',
    'none': ''
}
sanitizer = 'tsan'
if osName == 'Linux':
    sanitizer = 'none'

sanitizerFlags = sanitizersFlags[sanitizer]

# if osName == 'Windows':
#     os.environ['CC'] = 'clang-cl'
#     os.environ['CXX'] = 'clang-cl'

cmakeCmd = 'cmake -DCMAKE_BUILD_TYPE=Debug {} {} ../..'.format(generator, sanitizerFlags)
print(cmakeCmd)
ret = os.system(cmakeCmd)
assert ret == 0, 'CMake failed, exiting'

ret = os.system(make)
assert ret == 0, 'Make failed, exiting'

def findFiles(prefix):
    '''Find all files under a given directory'''

    paths = []

    for root, _, files in os.walk(prefix):
        for path in files:
            fullPath = os.path.join(root, path)

            if os.path.islink(fullPath):
                continue

            paths.append(fullPath)

    return paths

#for path in findFiles('.'):
#    print(path)

# We need to copy the zlib DLL in the current work directory
shutil.copy(os.path.join(
    '..',
    '..',
    '..',
    'third_party',
    'ZLIB-Windows',
    'zlib-1.2.11_deploy_v140',
    'release_dynamic',
    'x64',
    'bin',
    'zlib.dll'), '.')

# lldb = "lldb --batch -o 'run' -k 'thread backtrace all' -k 'quit 1'"
lldb = ""  # Disabled for now
testCommand = '{} {} {}'.format(lldb, testBinary, os.getenv('TEST', ''))
command = Command(testCommand)
timedout, ret = command.run()
assert ret == 0, 'Test command failed'