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import importlib.util
import json
from pathlib import Path
import tempfile
import unittest


spec = importlib.util.spec_from_file_location("study_analysis", Path(__file__).parents[1] / "analyze.py")
analysis = importlib.util.module_from_spec(spec)
spec.loader.exec_module(analysis)


class CurveTests(unittest.TestCase):
    def setUp(self):
        self.temp = tempfile.TemporaryDirectory()
        self.root = Path(self.temp.name)
        self.config = {"tasks": [{"instance_id": f"task-{i}"} for i in range(5)],
                       "runs": [{"run_id": f"task-{i}-{condition}", "task": f"task-{i}",
                                 "condition": condition, "category": "benchmark"}
                                for condition in analysis.CONDITIONS for i in range(5)]}

    def tearDown(self):
        self.temp.cleanup()

    def write_episode(self, task, condition, grades, stop_reason="completed"):
        directory = self.root / "episodes" / f"task-{task}-{condition}"
        (directory / "runner").mkdir(parents=True)
        (directory / "grades.json").write_text(json.dumps(grades))
        (directory / "runner" / "result.json").write_text(json.dumps({"stop_reason": stop_reason, "elapsed_seconds": 120}))
        (directory / "runner" / "events.jsonl").write_text(json.dumps({"type": "episode_start", "sequence": 1,
                                                                      "utc": "2026-10-09T00:00:00Z", "elapsed_ms": 0}) + "\n")

    def row(self, rows, instant):
        return next(row for row in rows if row["axis"] == "wall_seconds" and row["condition"] == "single" and row["time_seconds"] == instant)

    def test_regressions_are_preserved_and_terminal_scores_carried(self):
        self.write_episode(0, "single", [{"elapsed_seconds": 30, "score": 0.6, "valid": True},
                                          {"elapsed_seconds": 60, "score": 0.2, "valid": True}])
        summary, rows = analysis.analyze(self.root, self.config)
        self.assertAlmostEqual(self.row(rows, 30)["mean_hidden_test_fraction"], 0.12)
        self.assertAlmostEqual(self.row(rows, 60)["mean_hidden_test_fraction"], 0.04)
        self.assertAlmostEqual(self.row(rows, 7200)["mean_hidden_test_fraction"], 0.04)
        self.assertAlmostEqual(summary["final"]["single"]["mean_hidden_test_fraction"], 0.04)
        self.assertEqual(summary["final"]["single"]["tasks_total"], 5)

    def test_tasks_are_equal_weighted_not_pooled_by_test_count(self):
        self.write_episode(0, "single", [{"elapsed_seconds": 30, "score": 1.0, "valid": True,
                                          "passed": 1, "test_count": 1}])
        self.write_episode(1, "single", [{"elapsed_seconds": 30, "score": 0.5, "valid": True,
                                          "passed": 500, "test_count": 1000}])
        summary, rows = analysis.analyze(self.root, self.config)
        self.assertAlmostEqual(summary["final"]["single"]["mean_hidden_test_fraction"], 0.3)
        self.assertEqual(self.row(rows, 30)["tasks_with_valid_grade"], 2)

    def test_invalid_grading_retains_last_valid_or_zero(self):
        self.write_episode(0, "single", [{"elapsed_seconds": 30, "score": 0.5, "valid": True},
                                          {"elapsed_seconds": 60, "score": 0.9, "valid": False, "error": "grader_unavailable"}], "agent_error")
        self.write_episode(1, "single", [{"elapsed_seconds": 30, "score": None, "valid": False}], "setup_error")
        summary, _ = analysis.analyze(self.root, self.config)
        self.assertAlmostEqual(summary["final"]["single"]["mean_hidden_test_fraction"], 0.1)
        episode = next(row for row in summary["episodes"] if row["run_id"] == "task-0-single")
        self.assertEqual(episode["status"], "failed")
        self.assertEqual(episode["final_score"], 0.5)
        self.assertEqual(episode["invalid_grade_count"], 1)

    def test_explicit_valid_zero_replaces_previous_success(self):
        self.write_episode(0, "single", [{"elapsed_seconds": 30, "score": 0.8, "valid": True},
                                          {"elapsed_seconds": 60, "score": 0.0, "valid": True}])
        summary, rows = analysis.analyze(self.root, self.config)
        self.assertEqual(summary["final"]["single"]["mean_hidden_test_fraction"], 0)
        self.assertEqual(self.row(rows, 60)["tasks_with_valid_grade"], 1)

    def test_grade_summary_fallback_uses_official_aggregate_only(self):
        self.write_episode(0, "single", [{"elapsed_seconds": 30, "sha256": "abc", "valid": True}])
        directory = self.root / "episodes" / "task-0-single" / "evaluations" / "abc" / "task-0"
        directory.mkdir(parents=True)
        (directory / "summary.json").write_text(json.dumps({"complete": True, "score": 0.75, "test_count": 100}))
        summary, _ = analysis.analyze(self.root, self.config)
        self.assertEqual(summary["final"]["single"]["mean_hidden_test_fraction"], 0.15)
        self.assertTrue((self.root / "curves.csv").exists())
        self.assertTrue((self.root / "summary.json").exists())

    def test_summary_fallback_respects_submission_and_infrastructure_classification(self):
        fixtures = [{"complete": False, "valid": True, "analysis_score": 0.0,
                     "score": 0.0, "scoring_status": "submission_failed"},
                    {"complete": False, "valid": False, "analysis_score": None,
                     "score": 0.9, "scoring_status": "infrastructure_failed"}]
        for task, summary in enumerate(fixtures):
            self.write_episode(task, "single", [{"elapsed_seconds": 30, "sha256": "abc", "valid": True}])
            directory = self.root / "episodes" / f"task-{task}-single" / "evaluations" / "abc" / f"task-{task}"
            directory.mkdir(parents=True)
            (directory / "summary.json").write_text(json.dumps(summary))
        summary, _ = analysis.analyze(self.root, self.config)
        episodes = {row["run_id"]: row for row in summary["episodes"]}
        self.assertTrue(episodes["task-0-single"]["has_valid_grade"])
        self.assertEqual(episodes["task-0-single"]["final_score"], 0.0)
        self.assertFalse(episodes["task-1-single"]["has_valid_grade"])
        self.assertEqual(episodes["task-1-single"]["invalid_grade_count"], 1)

    def test_controller_grading_failure_overrides_completed_runner(self):
        self.write_episode(0, "single", [{"elapsed_seconds": 30, "score": None, "valid": False}])
        directory = self.root / "episodes" / "task-0-single"
        (directory / "status.json").write_text(json.dumps({"status": "failed", "error": "grader failed"}))
        summary, _ = analysis.analyze(self.root, self.config)
        episode = next(row for row in summary["episodes"] if row["run_id"] == "task-0-single")
        self.assertEqual(episode["status"], "failed")
        self.assertEqual(episode["invalid_grade_count"], 1)
        self.assertEqual(summary["final"]["single"]["episodes_completed"], 0)

    def test_normal_wall_time_cutoff_is_a_completed_attempt(self):
        self.write_episode(0, "single", [{"elapsed_seconds": 120, "score": 0.2, "valid": True}], "wall_time_limit")
        summary, _ = analysis.analyze(self.root, self.config)
        episode = next(row for row in summary["episodes"] if row["run_id"] == "task-0-single")
        self.assertEqual(episode["status"], "completed")
        self.assertEqual(episode["stop_reason"], "wall_time_limit")
        directory = self.root / "episodes" / "task-0-single"
        (directory / "status.json").write_text(json.dumps({"status": "interrupted", "stop_reason": "controller_restart"}))
        summary, _ = analysis.analyze(self.root, self.config)
        episode = next(row for row in summary["episodes"] if row["run_id"] == "task-0-single")
        self.assertEqual(episode["status"], "interrupted")
        self.assertEqual(episode["stop_reason"], "controller_restart")


class ClockTests(unittest.TestCase):
    def event(self, type_, seconds, sequence, **kwargs):
        return {"type": type_, "elapsed_ms": seconds * 1000, "sequence": sequence, **kwargs}

    def request(self, ident, agent, prompt, context, output, started=0, ended=1):
        return {"id": ident, "agent_id": agent, "client_request_id": ident, "status": "complete",
                "prompt_tokens": prompt, "completion_tokens": output, "context_charged": context,
                "started_at": f"2026-10-09T00:00:{started:02d}Z", "ended_at": f"2026-10-09T00:00:{ended:02d}Z"}

    def test_parallel_clocks_message_handoff_and_child_inheritance(self):
        events = [self.event("episode_start", 0, 1, utc="2026-10-09T00:00:00Z"),
                  self.event("agent_created", 0, 2, agent_id="a", parent_id=None),
                  self.event("agent_created", 0, 3, agent_id="b", parent_id=None),
                  self.event("tool_start", 1.1, 4, agent_id="a"),
                  self.event("tool_end", 4.1, 5, agent_id="a", causal_event_id=4, duration_ms=3000),
                  self.event("message_sent", 4.2, 6, agent_id="a"),
                  self.event("message_delivered", 4.3, 7, agent_id="b", causal_event_id=6),
                  self.event("tool_start", 4.4, 8, agent_id="b"),
                  self.event("tool_end", 6.4, 9, agent_id="b", causal_event_id=8, duration_ms=2000),
                  self.event("agent_created", 6.5, 10, agent_id="child", parent_id="b"),
                  self.event("tool_start", 6.6, 11, agent_id="child"),
                  self.event("tool_end", 7.6, 12, agent_id="child", causal_event_id=11, duration_ms=1000),
                  self.event("snapshot", 7.7, 13, path="snapshot.tar.gz")]
        requests = [self.request("req-a", "a", 20_000, 10_265, 265),
                    self.request("req-b", "b", 0, 265, 265)]
        clocks = analysis.clock_trace(events, requests)
        self.assertTrue(clocks["valid"])
        self.assertEqual(analysis.clocks_at(clocks, 1), (2, 3))  # max, not sum
        self.assertEqual(analysis.clocks_at(clocks, 100, "snapshot.tar.gz"), (8, 9))

    def test_gateway_only_compaction_is_counted(self):
        events = [self.event("episode_start", 0, 1, utc="2026-10-09T00:00:00Z")]
        requests = [self.request("ordinary", "a", 0, 265, 265),
                    self.request("compaction", "a", 0, 530, 530, started=2, ended=3)]
        clocks = analysis.clock_trace(events, requests)
        self.assertTrue(clocks["valid"])
        self.assertEqual(analysis.clocks_at(clocks, 4), (3, 3))

    def test_unknown_usage_invalidates_normalized_curve(self):
        events = [self.event("episode_start", 0, 1, utc="2026-10-09T00:00:00Z")]
        request = self.request("unknown", "a", 0, 0, 0)
        request.update(completion_tokens=None, prompt_tokens=None, status="unknown_usage_conservatively_charged")
        clocks = analysis.clock_trace(events, [request])
        self.assertFalse(clocks["valid"])
        episode = {"condition": "single", "task": "a", "clock_valid": False,
                   "points": [{"wall_seconds": 30, "reference_seconds": 2, "score": 0.5, "order": 0}]}
        row = analysis.aggregate_at([episode], ["a"], "single", 5, "reference_seconds")
        self.assertIsNone(row["mean_hidden_test_fraction"])
        self.assertEqual(analysis.aggregate_at([episode], ["a"], "single", 30, "wall_seconds")["mean_hidden_test_fraction"], 0.5)


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