# imports
import contextlib
import io
import json
import os
import tempfile
import unittest

# bsie imports
from bsfs.front import build_graph
from bsfs.graph import Graph

# objects to test
from bsfs.apps.init import main, init_sparql_store


## code ##

class TestInit(unittest.TestCase):
    def test_main(self):

        # cannot pass an invalid store
        with contextlib.redirect_stderr(io.StringIO()):
            self.assertRaises(SystemExit, main, ['--user', 'http://example.com/me', 'foobar'])

        # produces a config structure
        outbuf = io.StringIO()
        with contextlib.redirect_stdout(outbuf):
            main(['--user', 'http://example.com/me', 'sparql'])
        self.assertEqual(json.loads(outbuf.getvalue()), {
            'Graph': {
                'user': 'http://example.com/me',
                'backend': {
                    'SparqlStore': {}}}})
        # config is valid
        self.assertIsInstance(build_graph(json.loads(outbuf.getvalue())), Graph)

        # respects user flag
        outbuf = io.StringIO()
        with contextlib.redirect_stdout(outbuf):
            main(['--user', 'http://example.com/you', 'sparql'])
        self.assertEqual(json.loads(outbuf.getvalue()), {
            'Graph': {
                'user': 'http://example.com/you',
                'backend': {
                    'SparqlStore': {}}}})

        # respects output flag
        _, path = tempfile.mkstemp(prefix='bsfs-test-', text=True)
        outbuf = io.StringIO()
        with contextlib.redirect_stdout(outbuf):
            main(['--user', 'http://example.com/me', '--output', path, 'sparql'])
        with open(path, 'rt') as ifile:
            config = ifile.read()
        os.unlink(path)
        self.assertEqual(outbuf.getvalue(), '')
        self.assertEqual(json.loads(config), {
            'Graph': {
                'user': 'http://example.com/me',
                'backend': {
                    'SparqlStore': {}}}})

    def test_init_sparql_store(self):
        # returns a config structure
        self.assertEqual(init_sparql_store('http://example.com/me'), {
            'Graph': {
                'user': 'http://example.com/me',
                'backend': {
                    'SparqlStore': {}}}})
        # respects user
        self.assertEqual(init_sparql_store('http://example.com/you'), {
            'Graph': {
                'user': 'http://example.com/you',
                'backend': {
                    'SparqlStore': {}}}})
        # the config is valid
        self.assertIsInstance(build_graph(init_sparql_store('http://example.com/me')), Graph)


## main ##

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

## EOF ##