#!/usr/bin/env python3

import inspect
import optparse
import os
import sys
import unittest
import zipfile
from unittest.mock import patch

import requests

localmodule = os.path.realpath(
    os.path.join(os.path.dirname(inspect.getfile(inspect.currentframe())), '..'))
print('localmodule: ' + localmodule)
if localmodule not in sys.path:
    sys.path.insert(0, localmodule)

import fdroidserver.common
import fdroidserver.index
import fdroidserver.signindex


GP_FINGERPRINT = 'B7C2EEFD8DAC7806AF67DFCD92EB18126BC08312A7F2D6F3862E46013C7A6135'


class IndexTest(unittest.TestCase):

    def setUp(self):
        fdroidserver.common.config = None
        config = fdroidserver.common.read_config(fdroidserver.common.options)
        config['jarsigner'] = fdroidserver.common.find_sdk_tools_cmd('jarsigner')
        fdroidserver.common.config = config
        fdroidserver.signindex.config = config

    @staticmethod
    def test_verify_jar_signature_succeeds():
        basedir = os.path.dirname(__file__)
        source_dir = os.path.join(basedir, 'signindex')
        for f in ('testy.jar', 'guardianproject.jar'):
            testfile = os.path.join(source_dir, f)
            fdroidserver.index.verify_jar_signature(testfile)

    def test_verify_jar_signature_fails(self):
        basedir = os.path.dirname(__file__)
        source_dir = os.path.join(basedir, 'signindex')
        testfile = os.path.join(source_dir, 'unsigned.jar')
        with self.assertRaises(fdroidserver.index.VerificationException):
            fdroidserver.index.verify_jar_signature(testfile)

    def test_get_public_key_from_jar_succeeds(self):
        basedir = os.path.dirname(__file__)
        source_dir = os.path.join(basedir, 'signindex')
        for f in ('testy.jar', 'guardianproject.jar'):
            testfile = os.path.join(source_dir, f)
            jar = zipfile.ZipFile(testfile)
            _, fingerprint = fdroidserver.index.get_public_key_from_jar(jar)
            # comparing fingerprints should be sufficient
            if f == 'testy.jar':
                self.assertTrue(fingerprint ==
                                '818E469465F96B704E27BE2FEE4C63AB' +
                                '9F83DDF30E7A34C7371A4728D83B0BC1')
            if f == 'guardianproject.jar':
                self.assertTrue(fingerprint == GP_FINGERPRINT)

    def test_get_public_key_from_jar_fails(self):
        basedir = os.path.dirname(__file__)
        source_dir = os.path.join(basedir, 'signindex')
        testfile = os.path.join(source_dir, 'unsigned.jar')
        jar = zipfile.ZipFile(testfile)
        with self.assertRaises(fdroidserver.index.VerificationException):
            fdroidserver.index.get_public_key_from_jar(jar)

    def test_download_repo_index_no_fingerprint(self):
        with self.assertRaises(fdroidserver.index.VerificationException):
            fdroidserver.index.download_repo_index("http://example.org")

    def test_download_repo_index_no_jar(self):
        with self.assertRaises(requests.exceptions.HTTPError):
            fdroidserver.index.download_repo_index("http://example.org?fingerprint=nope")

    @patch('requests.head')
    def test_download_repo_index_same_etag(self, head):
        url = 'http://example.org?fingerprint=test'
        etag = '"4de5-54d840ce95cb9"'

        head.return_value.headers = {'ETag': etag}
        index, new_etag = fdroidserver.index.download_repo_index(url, etag=etag)

        self.assertIsNone(index)
        self.assertEqual(etag, new_etag)

    @patch('requests.get')
    @patch('requests.head')
    def test_download_repo_index_new_etag(self, head, get):
        url = 'http://example.org?fingerprint=' + GP_FINGERPRINT
        etag = '"4de5-54d840ce95cb9"'

        # fake HTTP answers
        head.return_value.headers = {'ETag': 'new_etag'}
        get.return_value.headers = {'ETag': 'new_etag'}
        get.return_value.status_code = 200
        testfile = os.path.join(os.path.dirname(__file__), 'signindex', 'guardianproject-v1.jar')
        with open(testfile, 'rb') as file:
            get.return_value.content = file.read()

        index, new_etag = fdroidserver.index.download_repo_index(url, etag=etag)

        # assert that the index was retrieved properly
        self.assertEqual('Guardian Project Official Releases', index['repo']['name'])
        self.assertEqual(GP_FINGERPRINT, index['repo']['fingerprint'])
        self.assertTrue(len(index['repo']['pubkey']) > 500)
        self.assertEqual(10, len(index['apps']))
        self.assertEqual(10, len(index['packages']))
        self.assertEqual('new_etag', new_etag)


if __name__ == "__main__":
    parser = optparse.OptionParser()
    parser.add_option("-v", "--verbose", action="store_true", default=False,
                      help="Spew out even more information than normal")
    (fdroidserver.common.options, args) = parser.parse_args(['--verbose'])

    newSuite = unittest.TestSuite()
    newSuite.addTest(unittest.makeSuite(IndexTest))
    unittest.main()