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"""Test for resource files management."""

__authors__ = ["T. Vincent"]
__license__ = "MIT"
__date__ = "08/03/2019"


import os
import unittest
import shutil
import socket
import urllib.request
import urllib.error

from silx.utils.ExternalResources import ExternalResources


def isSilxWebsiteAvailable():
    try:
        urllib.request.urlopen('http://www.silx.org', timeout=1)
        return True
    except urllib.error.URLError:
        return False
    except socket.timeout:
        # This exception is still received in Python 2.7
        return False


class TestExternalResources(unittest.TestCase):
    """This is a test for the ExternalResources"""

    @classmethod
    def setUpClass(cls):
        if not isSilxWebsiteAvailable():
            raise unittest.SkipTest("Network or silx website not available")

    def setUp(self):
        self.resources = ExternalResources("toto%d" % os.getpid(), "http://www.silx.org/pub/silx/")

    def tearDown(self):
        if self.resources.data_home:
            shutil.rmtree(self.resources.data_home)
        self.resources = None

    def test_download(self):
        "test the download from silx.org"
        f = self.resources.getfile("lena.png")
        self.assertTrue(os.path.exists(f))
        di = self.resources.getdir("source.tar.gz")
        for fi in di:
            self.assertTrue(os.path.exists(fi))

    def test_download_all(self):
        "test the download of all files from silx.org"
        filename = self.resources.getfile("lena.png")
        directory = "source.tar.gz"
        filelist = self.resources.getdir(directory)
        # download file and remove it to create a json mapping file
        os.remove(filename)
        directory_path = os.path.commonprefix(filelist)
        # Make sure we will rmtree a dangerous path like "/"
        self.assertIn(self.resources.data_home, directory_path)
        shutil.rmtree(directory_path)
        filelist = self.resources.download_all()
        self.assertGreater(len(filelist), 1, "At least 2 items were downloaded")