#!/usr/bin/env python3
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# Copyright (c) 2021-2022 Paul Mattes.
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# pr3287 multi-host tests

import os
import re
from subprocess import Popen, PIPE, DEVNULL
import sys
import tempfile
import unittest
import Common.Test.cti as cti
import Common.Test.setupHosts as setupHosts

hostsSetup = setupHosts.present()

@unittest.skipIf(sys.platform == 'cygwin', 'This does some very strange things on Cygwin')
class TestPr3287MultiHost(cti.cti):

    # pr3287 multi-host test
    @unittest.skipUnless(hostsSetup, setupHosts.warning)
    def pr3287_multi_host(self, ipv4=True, ipv6=True):

        # Start pr3287.
        handle, tracefile = tempfile.mkstemp()
        os.close(handle)
        uport, ts = cti.unused_port()
        ts.close()
        args46 = []
        if not ipv4:
            args46 += ['-6']
        if not ipv6:
            args46 += ['-4']
        pr3287 = Popen(cti.vgwrap(['pr3287', '-trace', '-tracefile', tracefile]
            + args46 + [f'{setupHosts.test_hostname}:{uport}']), stdout=DEVNULL, stderr=DEVNULL)
        self.children.append(pr3287)

        # Wait for the process to exit.
        self.vgwait(pr3287, assertOnFailure=False, timeout=8)

        # Make sure both are processed.
        with open(tracefile, 'r') as file:
            output = file.readlines()
        tried = []
        for line in output:
            m = re.search(r'Trying (.*), port', line)
            if m != None:
                tried += [m.group(1)]
        os.unlink(tracefile)
        if ipv4:
            self.assertIn('127.0.0.1', tried, 'Did not try IPv4')
        else:
            self.assertNotIn('127.0.0.1', tried, 'Should not try IPv4')
        if ipv6:
            self.assertIn('::1', tried, 'Did not try IPv6')
        else:
            self.assertNotIn('::1', tried, 'Should not try IPv6')

    def test_pr3287_multi_host(self):
        self.pr3287_multi_host()
    def test_pr3287_multi_host4(self):
        self.pr3287_multi_host(ipv6=False)
    def test_pr3287_multi_host6(self):
        self.pr3287_multi_host(ipv4=False)

    # pr3287 host sequence test
    def test_pr3287_multi_host_sequence(self):

        # Start a copy server.
        c = cti.copyserver(justAccept=True)

        # Start pr3287.
        handle, tracefile = tempfile.mkstemp()
        os.close(handle)
        uport, ts = cti.unused_port()
        ts.close()
        vport, ts = cti.unused_port()
        ts.close()
        # Set up a mock resolver result with the unused port, the real port and the other unused port.
        os.environ['MOCK_SYNC_RESOLVER'] = f'127.0.0.1/{uport};127.0.0.1/{c.port};127.0.0.1/{vport}'
        pr3287 = Popen(cti.vgwrap(['pr3287', '-trace', '-tracefile', tracefile,
            f'foo:9999']), stdout=DEVNULL, stderr=DEVNULL)
        os.environ['MOCK_SYNC_RESOLVER'] = ''
        self.children.append(pr3287)

        # Wait for the process to exit.
        c.close()
        self.vgwait(pr3287, assertOnFailure=False)

        # Make sure only two addresses are processed.
        with open(tracefile, 'r') as file:
            output = file.readlines()
        tried = []
        for line in output:
            m = re.search(r'Trying (.*), port ([0-9]+)', line)
            if m != None:
                tried += [m.group(1) + ' ' + m.group(2)]
        os.unlink(tracefile)
        self.assertEqual(tried, [f'127.0.0.1 {uport}', f'127.0.0.1 {c.port}'])

if __name__ == '__main__':
    unittest.main()
