# Copyright 2014 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the 'License'). You
# may not use this file except in compliance with the License. A copy of
# the License is located at
#
# https://aws.amazon.com/apache2.0/
#
# or in the 'license' file accompanying this file. This file is
# distributed on an 'AS IS' BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
# ANY KIND, either express or implied. See the License for the specific
# language governing permissions and limitations under the License.
import pytest

from botocore.hooks import HierarchicalEmitter
from botocore.model import ServiceModel

from boto3.utils import ServiceContext
from boto3.resources.collection import CollectionFactory, CollectionManager, \
                                       ResourceCollection
from boto3.resources.base import ResourceMeta
from boto3.resources.factory import ResourceFactory
from boto3.resources.model import Collection
from tests import BaseTestCase, mock


class TestCollectionFactory(BaseTestCase):
    def setUp(self):
        super(TestCollectionFactory, self).setUp()

        self.client = mock.Mock()
        self.client.can_paginate.return_value = False
        self.parent = mock.Mock()
        self.parent.meta = ResourceMeta('test', client=self.client)
        self.resource_factory = ResourceFactory(mock.Mock())
        self.service_model = ServiceModel({})
        self.event_emitter = HierarchicalEmitter()

        self.factory = CollectionFactory()
        self.load = self.factory.load_from_definition

    def test_create_subclasses(self):
        resource_defs = {
            'Frob': {},
            'Chain': {
                'hasMany': {
                    'Frobs': {
                        'request': {
                            'operation': 'GetFrobs'
                        },
                        'resource': {
                            'type': 'Frob'
                        }
                    }
                }
            }
        }
        collection_model = Collection(
            'Frobs', resource_defs['Chain']['hasMany']['Frobs'],
            resource_defs)

        service_context = ServiceContext(
            service_name='test',
            resource_json_definitions=resource_defs,
            service_model=self.service_model,
            service_waiter_model=None
        )
        collection_cls = self.load(
            resource_name='Chain',
            collection_model=collection_model,
            service_context=service_context,
            event_emitter=self.event_emitter
        )
        collection = collection_cls(
            collection_model=collection_model,
            parent=self.parent,
            factory=self.resource_factory,
            service_context=service_context
        )

        assert collection_cls.__name__ == 'test.Chain.FrobsCollectionManager'
        assert isinstance(collection, CollectionManager)

        # Make sure that collection manager created from the factory
        # returns a ResourceCollection.
        assert isinstance(collection.all(), ResourceCollection)

        # Make sure that the collection returned from the collection
        # manager can be chained and return a ResourceCollection as well.
        assert isinstance(collection.all().all(), ResourceCollection)

    @mock.patch('boto3.resources.collection.BatchAction')
    def test_create_batch_actions(self, action_mock):
        resource_defs = {
            'Frob': {
                'batchActions': {
                    'Delete': {
                        'request': {
                            'operation': 'DeleteFrobs'
                        }
                    }
                }
            },
            'Chain': {
                'hasMany': {
                    'Frobs': {
                        'request': {
                            'operation': 'GetFrobs'
                        },
                        'resource': {
                            'type': 'Frob'
                        }
                    }
                }
            }
        }

        collection_model = Collection(
            'Frobs', resource_defs['Chain']['hasMany']['Frobs'],
            resource_defs)

        service_context = ServiceContext(
            service_name='test',
            resource_json_definitions=resource_defs,
            service_model=self.service_model,
            service_waiter_model=None
        )
        collection_cls = self.load(
            resource_name='Chain',
            collection_model=collection_model,
            service_context=service_context,
            event_emitter=self.event_emitter
        )
        collection = collection_cls(
            collection_model=collection_model,
            parent=self.parent,
            factory=self.resource_factory,
            service_context=service_context
        )

        assert hasattr(collection, 'delete')

        collection.delete()

        action_mock.return_value.assert_called_with(collection)


class TestResourceCollection(BaseTestCase):
    def setUp(self):
        super(TestResourceCollection, self).setUp()

        # Minimal definition so things like repr work
        self.collection_def = {
            'request': {
                'operation': 'TestOperation'
            },
            'resource': {
                'type': 'Frob'
            }
        }
        self.client = mock.Mock()
        self.client.can_paginate.return_value = False
        self.parent = mock.Mock()
        self.parent.meta = ResourceMeta('test', client=self.client)
        self.factory = ResourceFactory(mock.Mock())
        self.service_model = ServiceModel({})

    def get_collection(self):
        resource_defs = {
            'Frob': {
                'identifiers': []
            }
        }

        # Build up a resource def identifier list based on what
        # the collection is expecting to be required from its
        # definition. This saves a bunch of repetitive typing
        # and lets you just define a collection in the tests
        # below. Any identifiers you expect to be availabe in
        # the resource definition will automatically be there.
        resource_def = self.collection_def.get('resource', {})
        for identifier in resource_def.get('identifiers', []):
            resource_defs['Frob']['identifiers'].append(
                {'name': identifier['target']})

        collection_model = Collection(
            'test', self.collection_def, resource_defs)

        collection = CollectionManager(
            collection_model=collection_model,
            parent=self.parent,
            factory=self.factory,
            service_context=ServiceContext(
                service_name='test',
                service_model=self.service_model,
                resource_json_definitions=resource_defs,
                service_waiter_model=None
            )
        )
        return collection

    def test_repr(self):
        collection = self.get_collection()
        assert 'CollectionManager' in repr(collection)

    def test_iteration_manager(self):
        # A collection manager is not iterable. You must first call
        # .all or .filter or another method to get an iterable.
        collection = self.get_collection()
        with pytest.raises(TypeError):
            list(collection)

    def test_iteration_non_paginated(self):
        self.collection_def = {
            'request': {
                'operation': 'GetFrobs'
            },
            'resource': {
                'type': 'Frob',
                'identifiers': [
                    {
                        'target': 'Id',
                        'source': 'response',
                        'path': 'Frobs[].Id'
                    }
                ]
            }
        }
        self.client.get_frobs.return_value = {
            'Frobs': [
                {'Id': 'one'},
                {'Id': 'two'},
                {'Id': 'three'},
                {'Id': 'four'}
            ]
        }
        collection = self.get_collection()
        items = list(collection.all())
        assert len(items) == 4
        assert items[0].id == 'one'
        assert items[1].id == 'two'
        assert items[2].id == 'three'
        assert items[3].id == 'four'

    def test_limit_param_non_paginated(self):
        self.collection_def = {
            'request': {
                'operation': 'GetFrobs'
            },
            'resource': {
                'type': 'Frob',
                'identifiers': [
                    {
                        'target': 'Id',
                        'source': 'response',
                        'path': 'Frobs[].Id'
                    }
                ]
            }
        }
        self.client.get_frobs.return_value = {
            'Frobs': [
                {'Id': 'one'},
                {'Id': 'two'},
                {'Id': 'three'},
                {'Id': 'four'}
            ]
        }
        collection = self.get_collection()
        items = list(collection.all().limit(2))
        assert len(items) == 2

        # Only the first two should be present
        assert items[0].id == 'one'
        assert items[1].id == 'two'

    def test_limit_method_non_paginated(self):
        self.collection_def = {
            'request': {
                'operation': 'GetFrobs'
            },
            'resource': {
                'type': 'Frob',
                'identifiers': [
                    {
                        'target': 'Id',
                        'source': 'response',
                        'path': 'Frobs[].Id'
                    }
                ]
            }
        }
        self.client.get_frobs.return_value = {
            'Frobs': [
                {'Id': 'one'},
                {'Id': 'two'},
                {'Id': 'three'},
                {'Id': 'four'}
            ]
        }
        collection = self.get_collection()
        items = list(collection.limit(2))
        assert len(items) == 2

        # Only the first two should be present
        assert items[0].id == 'one'
        assert items[1].id == 'two'

    @mock.patch('boto3.resources.collection.ResourceHandler')
    def test_filters_non_paginated(self, handler):
        self.collection_def = {
            'request': {
                'operation': 'GetFrobs'
            },
            'resource': {
                'type': 'Frob',
                'identifiers': []
            }
        }
        self.client.get_frobs.return_value = {}
        handler.return_value.return_value = []
        collection = self.get_collection()

        list(collection.filter(Param1='foo', Param2=3).limit(2))

        # Note - limit is not passed through to the low-level call
        self.client.get_frobs.assert_called_with(Param1='foo', Param2=3)

    def test_page_iterator_returns_pages_of_items(self):
        self.collection_def = {
            'request': {
                'operation': 'GetFrobs'
            },
            'resource': {
                'type': 'Frob',
                'identifiers': [
                    {
                        'target': 'Id',
                        'source': 'response',
                        'path': 'Frobs[].Id'
                    }
                ]
            }
        }
        self.client.can_paginate.return_value = True
        self.client.get_paginator.return_value.paginate.return_value = [
            {
                'Frobs': [
                    {'Id': 'one'},
                    {'Id': 'two'}
                ]
            }, {
                'Frobs': [
                    {'Id': 'three'},
                    {'Id': 'four'}
                ]
            }
        ]
        collection = self.get_collection()
        pages = list(collection.limit(3).pages())
        assert len(pages) == 2
        assert len(pages[0]) == 2
        assert len(pages[1]) == 1

    def test_page_iterator_page_size(self):
        self.collection_def = {
            'request': {
                'operation': 'GetFrobs'
            },
            'resource': {
                'type': 'Frob',
                'identifiers': [
                    {
                        'target': 'Id',
                        'source': 'response',
                        'path': 'Frobs[].Id'
                    }
                ]
            }
        }
        self.client.can_paginate.return_value = True
        paginator = self.client.get_paginator.return_value
        paginator.paginate.return_value = []

        collection = self.get_collection()
        list(collection.page_size(5).pages())

        paginator.paginate.assert_called_with(
            PaginationConfig={'PageSize': 5, 'MaxItems': None})

    def test_iteration_paginated(self):
        self.collection_def = {
            'request': {
                'operation': 'GetFrobs'
            },
            'resource': {
                'type': 'Frob',
                'identifiers': [
                    {
                        'target': 'Id',
                        'source': 'response',
                        'path': 'Frobs[].Id'
                    }
                ]
            }
        }
        self.client.can_paginate.return_value = True
        self.client.get_paginator.return_value.paginate.return_value = [
            {
                'Frobs': [
                    {'Id': 'one'},
                    {'Id': 'two'}
                ]
            }, {
                'Frobs': [
                    {'Id': 'three'},
                    {'Id': 'four'}
                ]
            }
        ]
        collection = self.get_collection()
        items = list(collection.all())
        assert len(items) == 4
        assert items[0].id == 'one'
        assert items[1].id == 'two'
        assert items[2].id == 'three'
        assert items[3].id == 'four'

        # Low-level pagination should have been called
        self.client.get_paginator.assert_called_with('get_frobs')
        paginator = self.client.get_paginator.return_value
        paginator.paginate.assert_called_with(
            PaginationConfig={'PageSize': None, 'MaxItems': None})

    def test_limit_param_paginated(self):
        self.collection_def = {
            'request': {
                'operation': 'GetFrobs'
            },
            'resource': {
                'type': 'Frob',
                'identifiers': [
                    {
                        'target': 'Id',
                        'source': 'response',
                        'path': 'Frobs[].Id'
                    }
                ]
            }
        }
        self.client.can_paginate.return_value = True
        self.client.get_paginator.return_value.paginate.return_value = [
            {
                'Frobs': [
                    {'Id': 'one'},
                    {'Id': 'two'}
                ]
            }, {
                'Frobs': [
                    {'Id': 'three'},
                    {'Id': 'four'}
                ]
            }
        ]
        collection = self.get_collection()
        items = list(collection.all().limit(2))
        assert len(items) == 2

        # Only the first two should be present
        assert items[0].id == 'one'
        assert items[1].id == 'two'

    def test_limit_method_paginated(self):
        self.collection_def = {
            'request': {
                'operation': 'GetFrobs'
            },
            'resource': {
                'type': 'Frob',
                'identifiers': [
                    {
                        'target': 'Id',
                        'source': 'response',
                        'path': 'Frobs[].Id'
                    }
                ]
            }
        }
        self.client.can_paginate.return_value = True
        self.client.get_paginator.return_value.paginate.return_value = [
            {
                'Frobs': [
                    {'Id': 'one'},
                    {'Id': 'two'}
                ]
            }, {
                'Frobs': [
                    {'Id': 'three'},
                    {'Id': 'four'}
                ]
            }
        ]
        collection = self.get_collection()
        items = list(collection.all().limit(2))
        assert len(items) == 2

        # Only the first two should be present
        assert items[0].id == 'one'
        assert items[1].id == 'two'

    @mock.patch('boto3.resources.collection.ResourceHandler')
    def test_filters_paginated(self, handler):
        self.client.can_paginate.return_value = True
        self.client.get_paginator.return_value.paginate.return_value = []
        handler.return_value.return_value = []
        collection = self.get_collection()

        list(collection.filter(Param1='foo', Param2=3).limit(2))

        paginator = self.client.get_paginator.return_value
        paginator.paginate.assert_called_with(
            PaginationConfig={'PageSize': None, 'MaxItems': 2},
            Param1='foo', Param2=3)

    @mock.patch('boto3.resources.collection.ResourceHandler')
    def test_filter_does_not_clobber_existing_list_values(self, handler):
        self.collection_def = {
            'request': {
                'operation': 'GetFrobs',
                "params": [
                    {"target": "Filters[0].Name", "source": "string",
                     "value": "frob-id"},
                    {"target": "Filters[0].Values[0]", "source": "identifier",
                     "name": "Id"}
                ]
            },
            'resource': {
                'type': 'Frob',
                'identifiers': [
                    {'target': 'Id', 'source': 'response',
                     'path': 'Frobs[].Id'}
                ]
            }
        }
        self.client.can_paginate.return_value = True
        self.client.get_paginator.return_value.paginate.return_value = []
        handler.return_value.return_value = []
        collection = self.get_collection()

        self.parent.id = 'my-id'
        list(collection.filter(
            Filters=[{'Name': 'another-filter', 'Values': ['foo']}]))
        paginator = self.client.get_paginator.return_value
        paginator.paginate.assert_called_with(
            PaginationConfig={'PageSize': None, 'MaxItems': None},
            Filters=[
                {'Values': ['my-id'], 'Name': 'frob-id'},
                {'Values': ['foo'], 'Name': 'another-filter'}
            ]
        )

    @mock.patch('boto3.resources.collection.ResourceHandler')
    def test_page_size_param(self, handler):
        self.client.can_paginate.return_value = True
        self.client.get_paginator.return_value.paginate.return_value = []
        handler.return_value.return_value = []
        collection = self.get_collection()

        list(collection.all().page_size(1))

        paginator = self.client.get_paginator.return_value
        paginator.paginate.assert_called_with(
            PaginationConfig={'PageSize': 1, 'MaxItems': None})

    @mock.patch('boto3.resources.collection.ResourceHandler')
    def test_page_size_method(self, handler):
        self.client.can_paginate.return_value = True
        self.client.get_paginator.return_value.paginate.return_value = []
        handler.return_value.return_value = []
        collection = self.get_collection()

        list(collection.page_size(1))

        paginator = self.client.get_paginator.return_value
        paginator.paginate.assert_called_with(
            PaginationConfig={'PageSize': 1, 'MaxItems': None})

    def test_chaining(self):
        self.collection_def = {
            'request': {
                'operation': 'GetFrobs'
            },
            'resource': {
                'type': 'Frob',
                'identifiers': [
                    {
                        'target': 'Id',
                        'source': 'response',
                        'path': 'Frobs[].Id'
                    }
                ]
            }
        }
        self.client.get_frobs.return_value = {
            'Frobs': [
                {'Id': 'one'},
                {'Id': 'two'},
                {'Id': 'three'},
                {'Id': 'four'}
            ]
        }
        collection = self.get_collection()

        items = list(collection.filter().all().all())

        assert len(items) == 4
        assert items[0].id == 'one'
        assert items[1].id == 'two'
        assert items[2].id == 'three'
        assert items[3].id == 'four'

    @mock.patch('boto3.resources.collection.ResourceHandler')
    def test_chaining_copies_parameters(self, handler):
        self.client.can_paginate.return_value = True
        self.client.get_paginator.return_value.paginate.return_value = []
        handler.return_value.return_value = []
        collection = self.get_collection()

        list(collection.all().filter(CustomArg=1).limit(3).page_size(3))

        paginator = self.client.get_paginator.return_value
        paginator.paginate.assert_called_with(
            PaginationConfig={'PageSize': 3, 'MaxItems': 3}, CustomArg=1)

    @mock.patch('boto3.resources.collection.ResourceHandler')
    def test_chaining_filters_does_not_clobber_list_values(self, handler):
        self.collection_def = {
            'request': {
                'operation': 'GetFrobs',
                "params": [
                    {"target": "Filters[0].Name", "source": "string",
                     "value": "frob-id"},
                    {"target": "Filters[0].Values[0]", "source": "identifier",
                     "name": "Id"}
                ]
            },
            'resource': {
                'type': 'Frob',
                'identifiers': [
                    {'target': 'Id', 'source': 'response',
                     'path': 'Frobs[].Id'}
                ]
            }
        }
        self.client.can_paginate.return_value = True
        self.client.get_paginator.return_value.paginate.return_value = []
        handler.return_value.return_value = []
        collection = self.get_collection()

        self.parent.id = 'my-id'
        collection = collection.filter(
            Filters=[{'Name': 'second-filter', 'Values': ['foo']}])
        list(collection.filter(
            Filters=[{'Name': 'third-filter', 'Values': ['bar']}]))
        paginator = self.client.get_paginator.return_value
        paginator.paginate.assert_called_with(
            PaginationConfig={'PageSize': None, 'MaxItems': None},
            Filters=[
                {'Values': ['my-id'], 'Name': 'frob-id'},
                {'Values': ['foo'], 'Name': 'second-filter'},
                {'Values': ['bar'], 'Name': 'third-filter'}
            ]
        )

    def test_chained_repr(self):
        collection = self.get_collection()

        assert 'ResourceCollection' in repr(collection.all())