import unittest

from fastapi.testclient import TestClient

from api.app import app
from env.grader import TASK_REGISTRY


class ApiContractTests(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        cls.client = TestClient(app)

    def test_reset_accepts_empty_post(self):
        response = self.client.post("/reset")

        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.headers["content-type"].split(";")[0], "application/json")
        self.assertIn("tasks", response.json())

    def test_reset_accepts_query_parameters_on_post(self):
        response = self.client.post("/reset?task_name=triage&seed=31")

        self.assertEqual(response.status_code, 200)
        payload = response.json()
        self.assertEqual(len(payload["tasks"]), len(TASK_REGISTRY["triage"]))
        self.assertEqual(payload["tasks"][0]["name"], TASK_REGISTRY["triage"][0]["name"])

    def test_reset_accepts_urlencoded_form_payload(self):
        response = self.client.post("/reset", data={"task_name": "medium", "seed": "42"})

        self.assertEqual(response.status_code, 200)
        payload = response.json()
        self.assertEqual(payload["tasks"][0]["name"], TASK_REGISTRY["medium"][0]["name"])

    def test_reset_accepts_raw_json_without_json_content_type(self):
        response = self.client.post(
            "/reset",
            content='{"task_name":"hard","seed":19}',
            headers={"content-type": "text/plain"},
        )

        self.assertEqual(response.status_code, 200)
        payload = response.json()
        self.assertEqual(payload["tasks"][0]["name"], TASK_REGISTRY["hard"][0]["name"])

    def test_validate_lists_submission_endpoints(self):
        response = self.client.get("/validate")

        self.assertEqual(response.status_code, 200)
        payload = response.json()
        self.assertEqual(payload["status"], "ok")
        self.assertIn("/reset", payload["endpoints"])
        self.assertEqual(payload["docker"]["app_import"], "api.app:app")


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