from django.urls import reverse

from opentech.apply.activity.models import Activity
from opentech.apply.funds.tests.factories.models import ApplicationSubmissionFactory
from opentech.apply.users.tests.factories import StaffFactory, UserFactory
from opentech.apply.utils.testing.tests import BaseViewTestCase

from .factories import ReviewFactory, ReviewFormFieldsFactory, ReviewFormFactory, ReviewOpinionFactory
from ..models import Review, ReviewOpinion
from ..options import NA, AGREE, DISAGREE


class StaffReviewsTestCase(BaseViewTestCase):
    user_factory = StaffFactory
    url_name = 'funds:submissions:reviews:{}'
    base_view_name = 'review'

    def get_kwargs(self, instance):
        return {'pk': instance.id, 'submission_pk': instance.submission.id}

    def test_can_access_review(self):
        review = ReviewFactory(author=self.user)
        response = self.get_page(review)
        self.assertContains(response, review.submission.title)
        self.assertContains(response, self.user.full_name)
        self.assertContains(response, reverse('funds:submissions:detail', kwargs={'pk': review.submission.id}))

    def test_can_access_other_review(self):
        submission = ApplicationSubmissionFactory()
        review = ReviewFactory(submission=submission)
        response = self.get_page(review)
        self.assertEqual(response.status_code, 200)


class StaffReviewListingTestCase(BaseViewTestCase):
    user_factory = StaffFactory
    url_name = 'funds:submissions:reviews:{}'
    base_view_name = 'review'

    def get_kwargs(self, instance):
        return {'submission_pk': instance.id}

    def test_can_access_review_listing(self):
        submission = ApplicationSubmissionFactory()
        reviews = ReviewFactory.create_batch(3, submission=submission)
        response = self.get_page(submission, 'list')
        self.assertContains(response, submission.title)
        self.assertContains(response, reverse('funds:submissions:detail', kwargs={'pk': submission.id}))
        for review in reviews:
            self.assertContains(response, review.author.full_name)

    def test_draft_reviews_dont_appear(self):
        submission = ApplicationSubmissionFactory()
        review = ReviewFactory.create(submission=submission, is_draft=True)
        response = self.get_page(submission, 'list')
        self.assertContains(response, submission.title)
        self.assertContains(response, reverse('funds:submissions:detail', kwargs={'pk': submission.id}))
        self.assertNotContains(response, review.author.full_name)


class StaffReviewFormTestCase(BaseViewTestCase):
    user_factory = StaffFactory
    url_name = 'funds:submissions:reviews:{}'
    base_view_name = 'review'

    @classmethod
    def setUpTestData(cls):
        super().setUpTestData()
        cls.submission = ApplicationSubmissionFactory(status='internal_review')

    def get_kwargs(self, instance):
        return {'submission_pk': instance.id}

    def test_can_access_form(self):
        response = self.get_page(self.submission, 'form')
        self.assertContains(response, self.submission.title)
        self.assertContains(response, reverse('funds:submissions:detail', kwargs={'pk': self.submission.id}))

    def test_cant_access_wrong_status(self):
        submission = ApplicationSubmissionFactory(rejected=True)
        response = self.get_page(submission, 'form')
        self.assertEqual(response.status_code, 403)

    def test_cant_resubmit_review(self):
        ReviewFactory(submission=self.submission, author=self.user)
        response = self.post_page(self.submission, {'data': 'value'}, 'form')
        self.assertEqual(response.context['has_submitted_review'], True)
        self.assertEqual(response.context['title'], 'Update Review draft')

    def test_can_edit_draft_review(self):
        ReviewFactory(submission=self.submission, author=self.user, is_draft=True)
        response = self.get_page(self.submission, 'form')
        self.assertEqual(response.context['has_submitted_review'], False)
        self.assertEqual(response.context['title'], 'Update Review draft')

    def test_revision_captured_on_review(self):
        form = self.submission.round.review_forms.first()

        data = ReviewFormFieldsFactory.form_response(form.fields)

        self.post_page(self.submission, data, 'form')
        review = self.submission.reviews.first()
        self.assertEqual(review.revision, self.submission.live_revision)

    def test_can_submit_draft_review(self):
        form = self.submission.round.review_forms.first()

        data = ReviewFormFieldsFactory.form_response(form.fields)
        data['save_draft'] = True
        self.post_page(self.submission, data, 'form')
        review = self.submission.reviews.first()
        self.assertTrue(review.is_draft)
        self.assertIsNone(review.revision)


class TestReviewScore(BaseViewTestCase):
    user_factory = StaffFactory
    url_name = 'funds:submissions:reviews:{}'
    base_view_name = 'review'

    @classmethod
    def setUpTestData(cls):
        super().setUpTestData()
        cls.submission = ApplicationSubmissionFactory(status='internal_review')

    def get_kwargs(self, instance):
        return {'submission_pk': instance.id}

    def submit_review_scores(self, *scores):
        if scores:
            form = ReviewFormFactory(form_fields__multiple__score=len(scores))
        else:
            form = ReviewFormFactory(form_fields__exclude__score=True)
        review_form = self.submission.round.review_forms.first()
        review_form.form = form
        review_form.save()

        data = ReviewFormFieldsFactory.form_response(form.form_fields, {
            field.id: {'score': score}
            for field, score in zip(form.score_fields, scores)
        })

        # Make a new person for every review
        self.client.force_login(self.user_factory())
        response = self.post_page(self.submission, data, 'form')
        self.assertIn(
            'funds/applicationsubmission_admin_detail.html',
            response.template_name,
            msg='Failed to post the form correctly'
        )
        self.client.force_login(self.user)
        return self.submission.reviews.first()

    def test_score_calculated(self):
        review = self.submit_review_scores(5)
        self.assertEqual(review.score, 5)

    def test_average_score_calculated(self):
        review = self.submit_review_scores(1, 5)
        self.assertEqual(review.score, (1 + 5) / 2)

    def test_no_score_is_NA(self):
        review = self.submit_review_scores()
        self.assertEqual(review.score, NA)

    def test_na_not_included_in_review_average(self):
        review = self.submit_review_scores(NA, 5)
        self.assertEqual(review.score, 5)

    def test_na_not_included_reviews_average(self):
        self.submit_review_scores(NA)
        self.assertIsNone(Review.objects.score())

    def test_na_not_included_multiple_reviews_average(self):
        self.submit_review_scores(NA)
        self.submit_review_scores(5)

        self.assertEqual(Review.objects.count(), 2)
        self.assertEqual(Review.objects.score(), 5)


class UserReviewFormTestCase(BaseViewTestCase):
    user_factory = UserFactory
    url_name = 'funds:submissions:reviews:{}'
    base_view_name = 'review'

    def get_kwargs(self, instance):
        return {'submission_pk': instance.id}

    def test_cant_access_form(self):
        submission = ApplicationSubmissionFactory(status='internal_review')
        response = self.get_page(submission, 'form')
        self.assertEqual(response.status_code, 403)


class ReviewDetailTestCase(BaseViewTestCase):
    user_factory = StaffFactory
    url_name = 'funds:submissions:reviews:{}'
    base_view_name = 'review'

    def get_kwargs(self, instance):
        return {'pk': instance.id, 'submission_pk': instance.submission.id}

    def test_review_detail_recommendation(self):
        submission = ApplicationSubmissionFactory(status='draft_proposal', workflow_stages=2)
        review = ReviewFactory(submission=submission, author=self.user, recommendation_yes=True)
        response = self.get_page(review)
        self.assertContains(response, submission.title)
        self.assertContains(response, "<p>Yes</p>")

    def test_review_detail_opinion(self):
        staff = StaffFactory()
        submission = ApplicationSubmissionFactory(status='draft_proposal', workflow_stages=2)
        review = ReviewFactory(submission=submission, author=self.user, recommendation_yes=True)
        ReviewOpinionFactory(review=review, author=staff, opinion_disagree=True)
        response = self.get_page(review)
        self.assertContains(response, "Disagrees")


class ReviewListTestCase(BaseViewTestCase):
    user_factory = StaffFactory
    url_name = 'funds:submissions:reviews:{}'
    base_view_name = 'list'

    def get_kwargs(self, instance):
        return {'submission_pk': instance.submission.id}

    def test_review_list_opinion(self):
        staff = StaffFactory()
        submission = ApplicationSubmissionFactory(status='draft_proposal', workflow_stages=2)
        review = ReviewFactory(submission=submission, author=self.user, recommendation_yes=True)
        ReviewOpinionFactory(review=review, author=staff, opinion_disagree=True)
        response = self.get_page(review)
        response_opinion = response.context['review_data']['opinions']['answers'][0]
        self.assertIn("Disagrees", response_opinion)
        self.assertIn(str(staff), response_opinion)


class StaffReviewOpinionCase(BaseViewTestCase):
    user_factory = StaffFactory
    url_name = 'funds:submissions:reviews:{}'
    base_view_name = 'review'

    @classmethod
    def setUpTestData(cls):
        super().setUpTestData()
        cls.submission = ApplicationSubmissionFactory(status='draft_proposal', workflow_stages=2)

    def get_kwargs(self, instance):
        return {'pk': instance.id, 'submission_pk': instance.submission.id}

    def test_can_see_opinion_buttons_on_others_review(self):
        staff = StaffFactory()
        review = ReviewFactory(submission=self.submission, author=staff, recommendation_yes=True)
        response = self.get_page(review)
        self.assertContains(response, 'name="agree"')

    def test_cant_see_opinion_buttons_on_self_review(self):
        review = ReviewFactory(submission=self.submission, author=self.user, recommendation_yes=True)
        response = self.get_page(review)
        self.assertNotContains(response, 'name="agree"')

    def test_can_add_opinion_to_others_review(self):
        staff = StaffFactory()
        review = ReviewFactory(submission=self.submission, author=staff, recommendation_yes=True)
        response = self.post_page(review, {'agree': AGREE})
        self.assertTrue(review.opinions.first().opinion_display in Activity.objects.first().message)
        self.assertEqual(ReviewOpinion.objects.all().count(), 1)
        self.assertEqual(ReviewOpinion.objects.first().opinion, AGREE)
        url = self.url_from_pattern('apply:submissions:reviews:review', kwargs={'submission_pk': self.submission.pk, 'pk': review.id})
        self.assertRedirects(response, url)

    def test_disagree_opinion_redirects_to_review_form(self):
        staff = StaffFactory()
        review = ReviewFactory(submission=self.submission, author=staff, recommendation_yes=True)
        response = self.post_page(review, {'disagree': DISAGREE})
        url = self.url_from_pattern('funds:submissions:reviews:form', kwargs={'submission_pk': self.submission.id})
        self.assertRedirects(response, url)


class NonStaffReviewOpinionCase(BaseViewTestCase):
    user_factory = UserFactory
    url_name = 'funds:submissions:reviews:{}'
    base_view_name = 'review'

    @classmethod
    def setUpTestData(cls):
        super().setUpTestData()
        cls.submission = ApplicationSubmissionFactory(status='draft_proposal', workflow_stages=2)

    def get_kwargs(self, instance):
        return {'pk': instance.id, 'submission_pk': instance.submission.id}

    def nonstaff_cant_post_opinion_to_review(self):
        staff = StaffFactory()
        review = ReviewFactory(submission=self.submission, author=staff, recommendation_yes=True)
        response = self.post_page(review, {'agree': AGREE})
        self.assertEqual(response.status_code, 403)