from datetime import datetime, timedelta

from opentech.apply.funds.tests.factories import ApplicationSubmissionFactory, ApplicationRevisionFactory
from opentech.apply.users.tests.factories import UserFactory, StaffFactory
from opentech.apply.utils.tests import BaseViewTestCase

from ..models import ApplicationRevision


class BaseSubmissionViewTestCase(BaseViewTestCase):
    url_name = 'funds:submissions:{}'
    base_view_name = 'detail'

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


class TestStaffSubmissionView(BaseSubmissionViewTestCase):
    user_factory = StaffFactory

    def test_can_view_a_submission(self):
        submission = ApplicationSubmissionFactory()
        response = self.get_page(submission)
        self.assertContains(response, submission.title)

    def test_can_progress_stage(self):
        submission = ApplicationSubmissionFactory(status='concept_review_discussion', workflow_stages=2, lead=self.user)
        response = self.post_page(submission, {'form-submitted-progress_form': '', 'action': 'invited_to_proposal'})

        # Invited for proposal is a a determination, so this will redirect to the determination form.
        url = self.url_from_pattern('funds:submissions:determinations:form', kwargs={'submission_pk': submission.id})
        self.assertRedirects(response, f"{url}?action=invited_to_proposal")

    def test_cant_progress_stage_if_not_lead(self):
        submission = ApplicationSubmissionFactory(status='concept_review_discussion', workflow_stages=2)
        self.post_page(submission, {'form-submitted-progress_form': '', 'action': 'invited_to_proposal'})

        submission = self.refresh(submission)

        self.assertEqual(submission.status, 'concept_review_discussion')
        self.assertIsNone(submission.next)

    def test_cant_access_edit_button_on_applicant_submission(self):
        submission = ApplicationSubmissionFactory(status='more_info')
        response = self.get_page(submission)
        self.assertNotContains(response, self.url(submission, 'edit', absolute=False))


class TestApplicantSubmissionView(BaseSubmissionViewTestCase):
    user_factory = UserFactory

    def test_can_view_own_submission(self):
        submission = ApplicationSubmissionFactory(user=self.user)
        response = self.get_page(submission)
        self.assertContains(response, submission.title)

    def test_sees_latest_draft_if_it_exists(self):
        submission = ApplicationSubmissionFactory(user=self.user)
        draft_revision = ApplicationRevisionFactory(submission=submission)
        submission.draft_revision = draft_revision
        submission.save()

        draft_submission = submission.from_draft()
        response = self.get_page(submission)

        self.assertContains(response, draft_submission.title)

    def test_cant_view_others_submission(self):
        submission = ApplicationSubmissionFactory()
        response = self.get_page(submission)
        self.assertEqual(response.status_code, 403)

    def test_get_edit_link_when_editable(self):
        submission = ApplicationSubmissionFactory(user=self.user, status='more_info')
        response = self.get_page(submission)
        self.assertContains(response, 'Edit')
        self.assertContains(response, self.url(submission, 'edit', absolute=False))
        self.assertNotContains(response, 'Congratulations')

    def test_get_congratulations_draft_proposal(self):
        submission = ApplicationSubmissionFactory(user=self.user, draft_proposal=True)
        response = self.get_page(submission)
        self.assertContains(response, 'Congratulations')

    def test_can_edit_own_submission(self):
        submission = ApplicationSubmissionFactory(user=self.user, draft_proposal=True)
        response = self.get_page(submission, 'edit')
        self.assertContains(response, submission.title)

    def test_gets_draft_on_edit_submission(self):
        submission = ApplicationSubmissionFactory(user=self.user, draft_proposal=True)
        draft_revision = ApplicationRevisionFactory(submission=submission)
        submission.draft_revision = draft_revision
        submission.save()

        response = self.get_page(submission, 'edit')
        self.assertDictEqual(response.context['object'].form_data, draft_revision.form_data)

    def test_cant_edit_submission_incorrect_state(self):
        submission = ApplicationSubmissionFactory(user=self.user, workflow_stages=2)
        response = self.get_page(submission, 'edit')
        self.assertEqual(response.status_code, 403)

    def test_cant_edit_other_submission(self):
        submission = ApplicationSubmissionFactory(draft_proposal=True)
        response = self.get_page(submission, 'edit')
        self.assertEqual(response.status_code, 403)


class TestRevisionsView(BaseSubmissionViewTestCase):
    user_factory = UserFactory

    def test_create_revisions_on_submit(self):
        submission = ApplicationSubmissionFactory(status='draft_proposal', workflow_stages=2, user=self.user)
        old_data = submission.form_data.copy()
        new_data = submission.raw_data
        new_title = 'New title'
        new_data[submission.must_include['title']] = new_title

        self.post_page(submission, {'submit': True, **new_data}, 'edit')

        submission = self.refresh(submission)

        self.assertEqual(submission.status, 'proposal_discussion')
        self.assertEqual(submission.revisions.count(), 2)
        self.assertDictEqual(submission.revisions.last().form_data, old_data)
        self.assertDictEqual(submission.live_revision.form_data, submission.form_data)
        self.assertEqual(submission.live_revision.author, self.user)
        self.assertEqual(submission.title, new_title)

    def test_dont_update_live_revision_on_save(self):
        submission = ApplicationSubmissionFactory(status='draft_proposal', workflow_stages=2, user=self.user)
        old_data = submission.form_data.copy()
        new_data = submission.raw_data
        new_data[submission.must_include['title']] = 'New title'
        self.post_page(submission, {'save': True, **new_data}, 'edit')

        submission = self.refresh(submission)

        self.assertEqual(submission.status, 'draft_proposal')
        self.assertEqual(submission.revisions.count(), 2)
        self.assertDictEqual(submission.draft_revision.form_data, submission.from_draft().form_data)
        self.assertEqual(submission.draft_revision.author, self.user)
        self.assertDictEqual(submission.live_revision.form_data, old_data)

    def test_existing_draft_edit_and_submit(self):
        submission = ApplicationSubmissionFactory(status='draft_proposal', workflow_stages=2, user=self.user)
        draft_data = submission.raw_data.copy()
        draft_data[submission.must_include['title']] = 'New title'
        self.post_page(submission, {'save': True, **draft_data}, 'edit')

        submission = self.refresh(submission)

        new_title = 'Newer title'
        draft_data[submission.must_include['title']] = new_title
        self.post_page(submission, {'submit': True, **draft_data}, 'edit')

        submission = self.refresh(submission)

        self.maxDiff = None
        self.assertEqual(submission.revisions.count(), 2)
        self.assertDictEqual(submission.draft_revision.form_data, submission.from_draft().form_data)
        self.assertDictEqual(submission.live_revision.form_data, submission.form_data)

        self.assertEqual(submission.title, new_title)


class TestRevisionList(BaseSubmissionViewTestCase):
    base_view_name = 'revisions:list'
    user_factory = StaffFactory

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

    def test_list_doesnt_include_draft(self):
        submission = ApplicationSubmissionFactory()
        draft_revision = ApplicationRevisionFactory(submission=submission)
        submission.draft_revision = draft_revision
        submission.save()

        response = self.get_page(submission)

        self.assertNotIn(draft_revision, response.context['object_list'])

    def test_get_in_correct_order(self):
        submission = ApplicationSubmissionFactory()

        revision = ApplicationRevisionFactory(submission=submission)
        ApplicationRevision.objects.filter(id=revision.id).update(timestamp=datetime.now() - timedelta(days=1))

        revision_older = ApplicationRevisionFactory(submission=submission)
        ApplicationRevision.objects.filter(id=revision_older.id).update(timestamp=datetime.now() - timedelta(days=2))

        response = self.get_page(submission)

        self.assertSequenceEqual(
            response.context['object_list'],
            [submission.live_revision, revision, revision_older],
        )