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import unittest

from fastapi.testclient import TestClient

from app import app, completed_states, sessions
from environment import IncidentEnv, validate_ticket_dataset
from incidents import TICKETS
from models import IncidentAction, IncidentState, TaskType


class IncidentEnvApiTests(unittest.TestCase):
    def setUp(self) -> None:
        sessions.clear()
        completed_states.clear()
        self.client = TestClient(app)

    def tearDown(self) -> None:
        sessions.clear()
        completed_states.clear()

    def test_health_schema_and_mcp_helper_endpoints(self) -> None:
        health_response = self.client.get("/health")
        self.assertEqual(health_response.status_code, 200)
        self.assertEqual(health_response.json()["status"], "healthy")

        schema_response = self.client.get("/schema")
        self.assertEqual(schema_response.status_code, 200)
        schema_body = schema_response.json()
        self.assertIn("action", schema_body)
        self.assertIn("observation", schema_body)
        self.assertIn("state", schema_body)

        mcp_response = self.client.post("/mcp", json={"jsonrpc": "2.0", "id": 1, "method": "ping"})
        self.assertEqual(mcp_response.status_code, 200)
        mcp_body = mcp_response.json()
        self.assertEqual(mcp_body["jsonrpc"], "2.0")
        self.assertEqual(mcp_body["id"], 1)

        grader_response = self.client.get("/grader")
        self.assertEqual(grader_response.status_code, 200)
        grader_body = grader_response.json()
        self.assertIn("notes", grader_body)
        self.assertIn("task2", grader_body["notes"])

    def test_tickets_endpoint_returns_safe_ticket_inventory(self) -> None:
        response = self.client.get("/tickets")
        self.assertEqual(response.status_code, 200)
        body = response.json()
        self.assertEqual(body["count"], len(TICKETS))
        self.assertEqual(body["tickets"][0]["incident_id"], "INC-001")
        self.assertIn("expected_field", body["tickets"][0])
        self.assertNotIn("ground_truth", body["tickets"][0])

    def test_ui_routes_and_assets_are_served(self) -> None:
        home_response = self.client.get("/")
        self.assertEqual(home_response.status_code, 200)
        self.assertIn("Incident Triage Environment", home_response.text)

        status_response = self.client.get("/status")
        self.assertEqual(status_response.status_code, 200)
        self.assertIn("Environment readiness dashboard", status_response.text)

        playground_response = self.client.get("/playground")
        self.assertEqual(playground_response.status_code, 200)
        self.assertIn("Interactive playground", playground_response.text)

        api_response = self.client.get("/api")
        self.assertEqual(api_response.status_code, 200)
        self.assertIn("API Explorer", api_response.text)

        asset_response = self.client.get("/assets/app.js")
        self.assertEqual(asset_response.status_code, 200)
        self.assertIn("bootstrap", asset_response.text)

    def test_reset_returns_requested_ticket_and_session_state(self) -> None:
        response = self.client.post(
            "/reset",
            json={"task_type": "task3", "ticket_id": "INC-014"},
        )

        self.assertEqual(response.status_code, 200)
        body = response.json()
        self.assertEqual(body["observation"]["incident_id"], "INC-014")
        self.assertEqual(body["observation"]["task_type"], "task3")
        self.assertEqual(body["reward"]["value"], 0.01)
        self.assertFalse(body["done"])
        self.assertIn("session_id", body["info"])
        self.assertEqual(body["info"]["state"]["status"], "awaiting_action")

    def test_reset_without_seed_is_deterministic_for_same_task(self) -> None:
        first_response = self.client.post("/reset", json={"task_type": "task2"})
        second_response = self.client.post("/reset", json={"task_type": "task2"})

        self.assertEqual(first_response.status_code, 200)
        self.assertEqual(second_response.status_code, 200)
        self.assertEqual(
            first_response.json()["observation"]["incident_id"],
            second_response.json()["observation"]["incident_id"],
        )

    def test_step_completes_episode_and_state_endpoint_reflects_completion(self) -> None:
        reset_response = self.client.post(
            "/reset",
            json={"task_type": "task3", "ticket_id": "INC-014"},
        )
        session_id = reset_response.json()["info"]["session_id"]

        step_response = self.client.post(
            f"/step?session_id={session_id}",
            json={
                "incident_id": "INC-014",
                "task_type": "task3",
                "action": "FAILOVER",
            },
        )

        self.assertEqual(step_response.status_code, 200)
        step_body = step_response.json()
        self.assertTrue(step_body["done"])
        self.assertEqual(step_body["reward"]["value"], 0.99)
        self.assertTrue(step_body["info"]["correct"])
        self.assertEqual(step_body["info"]["ground_truth"], "FAILOVER")

        state_response = self.client.get(f"/state?session_id={session_id}")
        self.assertEqual(state_response.status_code, 200)
        state_body = state_response.json()
        self.assertTrue(state_body["done"])
        self.assertEqual(state_body["status"], "completed")
        self.assertEqual(state_body["last_reward"], 0.99)
        self.assertNotIn(session_id, sessions)
        self.assertIn(session_id, completed_states)

        repeated_step_response = self.client.post(
            f"/step?session_id={session_id}",
            json={
                "incident_id": "INC-014",
                "task_type": "task3",
                "action": "FAILOVER",
            },
        )
        self.assertEqual(repeated_step_response.status_code, 400)
        self.assertIn("already completed", repeated_step_response.json()["detail"])

    def test_step_rejects_action_for_wrong_task_type(self) -> None:
        reset_response = self.client.post(
            "/reset",
            json={"task_type": "task3", "ticket_id": "INC-014"},
        )
        session_id = reset_response.json()["info"]["session_id"]

        step_response = self.client.post(
            f"/step?session_id={session_id}",
            json={
                "incident_id": "INC-014",
                "task_type": "task2",
                "root_cause": "NETWORK",
            },
        )

        self.assertEqual(step_response.status_code, 400)
        self.assertIn("does not match", step_response.json()["detail"])

    def test_dataset_validation_rejects_empty_ground_truth(self) -> None:
        with self.assertRaisesRegex(RuntimeError, "empty ground_truth"):
            validate_ticket_dataset(
                [
                    {
                        "incident_id": "INC-BAD",
                        "task_type": "task1",
                        "alert_text": "Broken test ticket",
                        "context": {},
                        "ground_truth": {},
                    }
                ]
            )

    def test_step_raises_clear_dataset_error_for_invalid_ground_truth(self) -> None:
        env = IncidentEnv()
        env.current_ticket = {
            "incident_id": "INC-BAD",
            "task_type": "task1",
            "alert_text": "Broken test ticket",
            "context": {},
            "ground_truth": {},
        }
        env.episode_id = "episode-bad"

        with self.assertRaisesRegex(RuntimeError, "dataset integrity error"):
            env.step(
                IncidentAction(
                    incident_id="INC-BAD",
                    task_type="task1",
                    severity="SEV1",
                )
            )

    def test_lifespan_shutdown_clears_session_stores(self) -> None:
        sessions["active-session"] = IncidentEnv()
        completed_states["done-session"] = IncidentState(
            episode_id="episode-1",
            session_id="done-session",
            step_count=1,
            max_steps=1,
            total_reward=0.99,
            done=True,
            incident_id="INC-001",
            task_type=TaskType.TASK1,
            difficulty="easy",
            status="completed",
            last_reward=0.99,
        )

        with TestClient(app) as client:
            response = client.get("/health")
            self.assertEqual(response.status_code, 200)

        self.assertEqual(sessions, {})
        self.assertEqual(completed_states, {})


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