# tests are fairly 'live' (but safe to run)
# setup authorized_keys for logged in user such
# that the user can log in as themselves before running tests

import unittest
import getpass
import ansible.runner
import os
import shutil
import time
try:
   import json
except:
   import simplejson as json

class TestRunner(unittest.TestCase):

   def setUp(self):
       self.user = getpass.getuser()
       self.runner = ansible.runner.Runner(
           module_name='ping',
           module_path='library/',
           module_args='',
           remote_user=self.user,
           remote_pass=None,
           host_list='test/ansible_hosts',
           timeout=5,
           forks=1,
           background=0,
           pattern='all',
           verbose=True,
       )
       self.cwd = os.getcwd()
       self.test_dir = os.path.join(self.cwd, 'test')
       self.stage_dir = self._prepare_stage_dir()

   def _prepare_stage_dir(self):
       stage_path = os.path.join(self.test_dir, 'test_data')
       if os.path.exists(stage_path):
           shutil.rmtree(stage_path, ignore_errors=False)
           assert not os.path.exists(stage_path)
       os.makedirs(stage_path)
       assert os.path.exists(stage_path)
       return stage_path

   def _get_test_file(self, filename):
       # get a file inside the test input directory
       filename = os.path.join(self.test_dir, filename)
       assert os.path.exists(filename)
       return filename
 
   def _get_stage_file(self, filename):
       # get a file inside the test output directory
       filename = os.path.join(self.stage_dir, filename)
       return filename

   def _run(self, module_name, module_args, background=0):
       ''' run a module and get the localhost results '''
       self.runner.module_name = module_name
       args = ' '.join(module_args)
       print "DEBUG: using args=%s" % args
       self.runner.module_args = args
       self.runner.background  = background
       results = self.runner.run()
       # when using nosetests this will only show up on failure
       # which is pretty useful
       print "RESULTS=%s" % results
       assert "127.0.0.1" in results['contacted']
       return results['contacted']['127.0.0.1'] 

   def test_ping(self):
       result = self._run('ping',[])
       assert "ping" in result

   def test_facter(self):
       result = self._run('facter',[])
       assert "hostname" in result

   # temporarily disbabled since it occasionally hangs
   # ohai's fault, setup module doesn't actually run this
   # to get ohai's "facts" anyway
   #
   #def test_ohai(self):
   #    result = self._run('ohai',[])
   #    assert "hostname" in result

   def test_copy(self):
       # test copy module, change trigger, etc
       pass

   def test_copy(self):
       input = self._get_test_file('sample.j2')
       output = self._get_stage_file('sample.out')
       assert not os.path.exists(output)
       result = self._run('copy', [
           "src=%s" % input,
           "dest=%s" % output,
       ])
       assert os.path.exists(output)
       data_in = file(input).read()
       data_out = file(output).read()
       assert data_in == data_out
       assert 'failed' not in result
       assert result['changed'] == True
       assert 'md5sum' in result
       result = self._run('copy', [
           "src=%s" % input,
           "dest=%s" % output,
       ])
       assert result['changed'] == False

   def test_template(self):
       input = self._get_test_file('sample.j2')
       metadata = self._get_test_file('metadata.json')
       output = self._get_stage_file('sample.out')
       result = self._run('template', [
           "src=%s" % input,
           "dest=%s" % output,
           "metadata=%s" % metadata
       ])
       assert os.path.exists(output)
       out = file(output).read()
       assert out.find("duck") != -1
       assert result['changed'] == True
       assert 'md5sum' in result
       assert 'failed' not in result
       result = self._run('template', [
           "src=%s" % input,
           "dest=%s" % output,
           "metadata=%s" % metadata
       ])
       assert result['changed'] == False

   def test_command(self):
   
       # test command module, change trigger, etc
       result = self._run('command', [ "/bin/echo", "hi" ])
       assert "failed" not in result
       assert "msg" not in result
       assert result['rc'] == 0
       assert result['stdout'] == 'hi'
       assert result['stderr'] == ''
   
       result = self._run('command', [ "/bin/false" ])
       assert result['rc'] == 1
       assert 'failed' not in result
   
       result = self._run('command', [ "/usr/bin/this_does_not_exist", "splat" ]) 
       assert 'msg' in result
       assert 'failed' in result
       assert 'rc' not in result

       result = self._run('shell', [ "/bin/echo", "$HOME" ])
       assert 'failed' not in result
       assert result['rc'] == 0 
   

   def test_setup(self):
       output = self._get_stage_file('output.json')
       result = self._run('setup', [ "metadata=%s" % output, "a=2", "b=3", "c=4" ])
       assert 'failed' not in result
       assert 'md5sum' in result
       assert result['changed'] == True
       outds = json.loads(file(output).read())
       assert outds['c'] == '4'
       # not bothering to test change hooks here since ohai/facter results change
       # almost every time so changed is always true, this just tests that
       # rewriting the file is ok
       result = self._run('setup', [ "metadata=%s" % output, "a=2", "b=3", "c=4" ])
       assert 'md5sum' in result

   def test_async(self):
       # test async launch and job status
       # of any particular module
       result = self._run('command', [ "/bin/sleep", "3" ], background=20)
       assert 'ansible_job_id' in result
       assert 'started' in result
       jid = result['ansible_job_id']
       # no real chance of this op taking a while, but whatever
       time.sleep(5)
       # CLI will abstract this (when polling), but this is how it works internally
       result = self._run('async_status', [ "jid=%s" % jid ])
       # TODO: would be nice to have tests for supervisory process
       # killing job after X seconds
       assert 'finished' in result
       assert 'failed' not in result
       assert 'rc' in result
       assert 'stdout' in result
       assert result['ansible_job_id'] == jid

   def test_yum(self):
       result = self._run('yum', [ "list=repos" ])
       assert 'failed' not in result

   def test_git(self):
       # TODO: tests for the git module
       pass

   def test_service(self):
       # TODO: tests for the service module
       pass