#!/usr/bin/env python3
#  Copyright 2016 Google Inc. 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.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License 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 fruit_test_common import *

COMMON_DEFINITIONS = '''
    #include "test_common.h"

    struct X;

    struct Annotation1 {};
    using XAnnot1 = fruit::Annotated<Annotation1, X>;

    struct Annotation2 {};
    using XAnnot2 = fruit::Annotated<Annotation2, X>;

    struct Annotation3 {};
    using XAnnot3 = fruit::Annotated<Annotation3, X>;
    '''

@pytest.mark.parametrize('XAnnot,XConstRefAnnot,YAnnot,YConstRefAnnot', [
    ('X', 'const X&', 'Y', 'const Y&'),
    ('fruit::Annotated<Annotation1, X>', 'ANNOTATED(Annotation1, const X&)',
     'fruit::Annotated<Annotation2, Y>', 'ANNOTATED(Annotation2, const Y&)')
])
def test_loop_in_autoinject(XAnnot, XConstRefAnnot, YAnnot, YConstRefAnnot):
    source = '''
        struct Y;

        struct X {
          INJECT(X(YConstRefAnnot)) {};
        };

        struct Y {
          INJECT(Y(XConstRefAnnot)) {};
        };

        fruit::Component<XAnnot> mutuallyConstructibleComponent() {
          return fruit::createComponent();
        }
        '''
    expect_compile_error(
        'SelfLoopError<XAnnot,YAnnot>',
        'Found a loop in the dependencies',
        COMMON_DEFINITIONS,
        source,
        locals())

@pytest.mark.parametrize('XAnnot,ConstXAnnot,XConstRefAnnot,YAnnot,YConstRefAnnot', [
    ('X', 'const X', 'const X&', 'Y', 'const Y&'),
    ('fruit::Annotated<Annotation1, X>', 'ANNOTATED(Annotation1, const X)', 'ANNOTATED(Annotation1, const X&)',
     'fruit::Annotated<Annotation2, Y>', 'ANNOTATED(Annotation2, const Y&)')
])
def test_loop_in_autoinject_const(XAnnot, ConstXAnnot, XConstRefAnnot, YAnnot, YConstRefAnnot):
    source = '''
        struct Y;

        struct X {
          INJECT(X(YConstRefAnnot)) {};
        };

        struct Y {
          INJECT(Y(XConstRefAnnot)) {};
        };

        fruit::Component<ConstXAnnot> mutuallyConstructibleComponent() {
          return fruit::createComponent();
        }
        '''
    expect_compile_error(
        'SelfLoopError<XAnnot,YAnnot>',
        'Found a loop in the dependencies',
        COMMON_DEFINITIONS,
        source,
        locals())

def test_loop_in_register_provider():
    source = '''
        struct X {};
        struct Y {};

        fruit::Component<X> mutuallyConstructibleComponent() {
          return fruit::createComponent()
              .registerProvider<X(Y)>([](Y) {return X();})
              .registerProvider<Y(X)>([](X) {return Y();});
        }
        '''
    expect_compile_error(
        'SelfLoopError<X,Y>',
        'Found a loop in the dependencies',
        COMMON_DEFINITIONS,
        source,
        locals())

def test_loop_in_register_provider_with_annotations():
    source = '''
        struct X {};

        fruit::Component<fruit::Annotated<Annotation1, X>> mutuallyConstructibleComponent() {
          return fruit::createComponent()
              .registerProvider<fruit::Annotated<Annotation1, X>(fruit::Annotated<Annotation2, X>)>([](X x) {return x;})
              .registerProvider<fruit::Annotated<Annotation2, X>(fruit::Annotated<Annotation1, X>)>([](X x) {return x;});
        }
        '''
    expect_compile_error(
        'SelfLoopError<fruit::Annotated<Annotation1, X>, fruit::Annotated<Annotation2, X>>',
        'Found a loop in the dependencies',
        COMMON_DEFINITIONS,
        source,
        locals())

def test_with_different_annotations_ok():
    source = '''
        struct X {};

        fruit::Component<XAnnot3> getComponent() {
          return fruit::createComponent()
              .registerProvider<XAnnot1()>([](){return X();})
              .registerProvider<XAnnot2(XAnnot1)>([](X x){return x;})
              .registerProvider<XAnnot3(XAnnot2)>([](X x){return x;});
        }

        int main() {
          fruit::Injector<XAnnot3> injector(getComponent);
          injector.get<XAnnot3>();
        }
        '''
    expect_success(
        COMMON_DEFINITIONS,
        source)

if __name__== '__main__':
    main(__file__)