"""Structural synthetic protocol tests; these are not ASR/retrieval proof."""
import json
from pathlib import Path
import unittest
import tempfile
import sys
import os
import wave
from run import segments, run_owned, recognized_window, decode_command, decoded_frames
from score import score


class ContractTests(unittest.TestCase):
    @unittest.skipUnless(os.environ.get("SEARCHI_TEST_FFMPEG"), "Requires verified CPU FFmpeg")
    def test_actual_ffmpeg_full_window_and_partial_tail_sample_coverage(self):
        ffmpeg = Path(os.environ["SEARCHI_TEST_FFMPEG"])
        with tempfile.TemporaryDirectory() as parent:
            scratch = Path(parent)
            for rate in [44100, 48000]:
                with self.subTest(rate=rate):
                    source = scratch / f"source-{rate}.wav"
                    with wave.open(str(source), "wb") as audio:
                        audio.setnchannels(1)
                        audio.setsampwidth(2)
                        audio.setframerate(rate)
                        audio.writeframes(b"\x00\x00" * (rate * 31))
                    for offset, length, expected in [(0, 30000, 480000), (30000, 1000, 16000)]:
                        output = scratch / "decoded.wav"
                        run_owned(decode_command(ffmpeg, source, offset, length, output), scratch,
                                  "samplecoverage", [(output, 970000)], 30)
                        self.assertEqual(decoded_frames(output, length), expected)

    def test_threefold_truncation_rejected(self):
        with tempfile.TemporaryDirectory() as parent:
            path = Path(parent) / "truncated.wav"
            with wave.open(str(path), "wb") as audio:
                audio.setnchannels(1)
                audio.setsampwidth(2)
                audio.setframerate(16000)
                audio.writeframes(b"\x00\x00" * 160000)
            with self.assertRaises(ValueError):
                decoded_frames(path, 30000)

    def test_invalid_actual_json_is_retained_and_next_window_parses(self):
        invalid = {"transcription": [{"offsets": {"from": 0, "to": 30010}, "text": "synthetic test"}]}
        valid = {"transcription": [{"offsets": {"from": 0, "to": 10}, "text": "synthetic test"}]}
        rows = [recognized_window(raw, offset, 30000, 1, 2) for raw, offset in [(invalid, 0), (valid, 30000)]]
        self.assertEqual(rows[0]["actual_whisper_json"], invalid)
        self.assertEqual(rows[0]["segments"], [])
        self.assertIn("validation_error", rows[0])
        self.assertNotIn("validation_error", rows[1])
        self.assertEqual(rows[1]["segments"][0]["start_ms"], 30000)

    def test_timeout_and_output_overflow_terminate_owned_child(self):
        for name, code, error, timeout in [
            ("timeout", "import time; time.sleep(10)", TimeoutError, 0.1),
            ("overflow", "import sys,time; sys.stdout.write('x'*5000000); sys.stdout.flush(); time.sleep(10)", ValueError, 5),
        ]:
            with self.subTest(name=name), tempfile.TemporaryDirectory() as parent:
                checkpoint = Path(parent) / "checkpoint.json"
                checkpoint.write_text('{"complete":false,"rows":[1]}')
                with tempfile.TemporaryDirectory(dir=parent) as scratch:
                    with self.assertRaises(error):
                        run_owned([sys.executable, "-c", code], Path(scratch), name, [], timeout)
                diagnostics = list(Path(parent).glob(f"speech-{name}-failure-*.json"))
                self.assertEqual(len(diagnostics), 1)
                report = json.loads(diagnostics[0].read_text())
                self.assertIsNotNone(report["exit_code"])
                self.assertEqual(report["error_type"], error.__name__)
                self.assertLessEqual(Path(report["bounded_log"]).stat().st_size, 4 * 1024 * 1024)
                self.assertEqual(json.loads(checkpoint.read_text())["rows"], [1])

    def test_failure_diagnostic_survives_scratch_cleanup(self):
        with tempfile.TemporaryDirectory() as parent:
            with tempfile.TemporaryDirectory(dir=parent) as scratch:
                with self.assertRaises(RuntimeError):
                    run_owned([sys.executable, "-c", "print('structural failure'); raise SystemExit(3)"], Path(scratch), "contract", [], 5)
            diagnostics = list(Path(parent).glob("speech-contract-failure-*.json"))
            self.assertEqual(len(diagnostics), 1)
            report = json.loads(diagnostics[0].read_text())
            self.assertEqual(report["exit_code"], 3)
            self.assertGreater(report["elapsed_ms"], 0)
            self.assertIn("structural failure", Path(report["bounded_log"]).read_text())

    def test_offsets_applied_once(self):
        actual = segments({"transcription": [{"offsets": {"from": 1500, "to": 2400}, "text": "test"}]}, 30000, 30000)
        self.assertEqual(actual[0]["start_ms"], 31500)
        self.assertEqual(actual[0]["end_ms"], 32400)

    def test_reject_invalid_times_and_text(self):
        for start, end, text in [(False, 2, "x"), (-1, 2, "x"), (2, 1, "x"), (0, 30001, "x"), (0, 1, "x" * 4097)]:
            with self.assertRaises(ValueError):
                segments({"transcription": [{"offsets": {"from": start, "to": end}, "text": text}]}, 0, 30000)

    def test_reject_nonmonotonic_times(self):
        with self.assertRaises(ValueError):
            segments({"transcription": [{"offsets": {"from": start, "to": start + 1}, "text": "x"} for start in [10, 2]]}, 0, 30000)

    def test_missing_rankings_fail(self):
        fixture = json.loads((Path(__file__).resolve().parents[2] / "fixtures/media/fixture.json").read_text())
        with self.assertRaises(ValueError):
            score(fixture, {})

    def test_point_is_distinct_from_overlap(self):
        fixture = json.loads((Path(__file__).resolve().parents[2] / "fixtures/media/fixture.json").read_text())
        queries = [query for query in fixture["queries"] if query["category"] == "video-speech"]
        rankings = {query["id"]: [{"asset": "clip04", "start_ms": 0, "end_ms": 100000}] for query in queries}
        report = score(fixture, rankings)
        self.assertEqual(report["point_hits"], 0)
        self.assertEqual(report["overlap_hits"], 8)


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