"""The answer side of a question, and who is handed it.

Run: DATABASE_URL=sqlite:///:memory: PYTHONPATH=backend python -m unittest discover -s backend/tests
"""
import unittest

import test_quiz_builder as fixtures


class QuestionDetailAccessTests(unittest.TestCase):
    """Being able to reach a question is not the same as having earned its answer.

    The bank listing has always nulled the answer side for anybody who does not
    write the question. /questions/detail/{id} did not: anybody signed in could
    ask for a question by id and be handed the correct option, the explanation,
    the per-option reasoning and the key points for a question they had never
    sat. Same rule, both routes.
    """

    def setUp(self):
        self.bank = fixtures.BuilderTests()
        self.bank.setUp()
        self.client = self.bank.client

    def tearDown(self):
        self.bank.tearDown()

    def detail(self, question_id=4):
        response = self.client.get(f"/questions/detail/{question_id}")
        self.assertEqual(response.status_code, 200, response.text)
        return response.json()

    def test_a_reader_gets_the_stem_and_none_of_the_answer(self):
        # Question 4 belongs to the peer; the owner may read it in the bank and
        # has no business writing it.
        self.bank.user = self.bank.owner
        body = self.detail(4)
        self.assertEqual(body["question_text"], "Question 4")
        self.assertEqual(body["options"], ["yes", "no"])
        self.assertEqual(body["image_path"], "q.png")
        for field in ("correct_answer", "explanation", "option_explanations",
                      "key_points", "attending_tip", "explanation_image_path"):
            self.assertIsNone(body[field], field)
        # And no explanation figure, which is answer-side by definition.
        self.assertTrue(all(f["role"] == "stem" for f in body["figures"]), body["figures"])

    def test_whoever_writes_it_gets_all_of_it(self):
        self.bank.user = self.bank.mod
        body = self.detail(4)
        self.assertEqual(body["correct_answer"], "yes")
        self.assertEqual(body["explanation"], "Full explanation")
        self.assertEqual(body["explanation_image_path"], "answer.png")

    def test_the_author_of_a_question_writes_it(self):
        # Question 3 is the owner's own.
        self.bank.user = self.bank.owner
        body = self.detail(3)
        self.assertEqual(body["correct_answer"], "yes")


if __name__ == "__main__":
    unittest.main()