import unittest
import webob
from webob.dec import wsgify
import webtest

from wsme import *
from wsme.controller import scan_api


class DummyProtocol(object):
    name = 'dummy'
    content_types = ['', None]

    def __init__(self):
        self.hits = 0

    def accept(self, req):
        return True

    def extract_path(self, request):
        return ['touch']

    def read_arguments(self, funcdef, request):
        self.lastreq = request
        self.hits += 1
        return {}

    def encode_result(self, funcdef, result):
        return str(result)

    def encode_error(self, infos):
        return str(infos)


def serve_ws(req, root):
    return root._handle_request(req)


class TestController(unittest.TestCase):
    def test_expose(self):
        class MyWS(WSRoot):
            @expose(int)
            def getint(self):
                return 1

        assert MyWS.getint._wsme_definition.return_type == int

    def test_validate(self):
        class MyWS(object):
            @expose(int)
            @validate(int, int, int)
            def add(self, a, b, c=0):
                return a + b + c

        args = MyWS.add._wsme_definition.arguments

        assert args[0].name == 'a'
        assert args[0].datatype == int
        assert args[0].mandatory
        assert args[0].default is None

        assert args[1].name == 'b'
        assert args[1].datatype == int
        assert args[1].mandatory
        assert args[1].default is None

        assert args[2].name == 'c'
        assert args[2].datatype == int
        assert not args[2].mandatory
        assert args[2].default == 0

    def test_register_protocol(self):
        import wsme.controller
        wsme.controller.register_protocol(DummyProtocol)
        assert wsme.controller.registered_protocols['dummy'] == DummyProtocol

        r = WSRoot()
        assert len(r.protocols) == 0
        
        r.addprotocol('dummy')
        assert r.protocols['dummy']

        r = WSRoot(['dummy'])
        assert r.protocols['dummy']

    def test_scan_api(self):
        class NS(object):
            @expose(int)
            @validate(int, int)
            def multiply(self, a, b):
                return a * b

        class MyRoot(WSRoot):
            ns = NS()

        r = MyRoot()

        api = [i for i in scan_api(r)]
        assert len(api) == 1
        fd = api[0]
        assert fd.path == ['ns']
        assert fd.name == 'multiply'

    def test_handle_request(self):
        class MyRoot(WSRoot):
            @expose()
            def touch(self):
                pass

        p = DummyProtocol()
        r = MyRoot(protocols=[p])

        app = webtest.TestApp(
            wsgify(r._handle_request))

        res = app.get('/')

        assert p.lastreq.path == '/'
        assert p.hits == 1

        res = app.get('/touch?wsmeproto=dummy')

        assert p.lastreq.path == '/touch'
        assert p.hits == 2