"""Golden RTL vectors through the Python FFI (no Python production codec)."""
import tempfile
import unittest
from pathlib import Path
from altera_logic import NativeAnalyzer


class AnalyzerTests(unittest.TestCase):
    def test_rtl_info_and_first_configuration_vector(self):
        core = NativeAnalyzer()
        self.assertEqual(core.next_request(), bytes.fromhex("A5 01 00 00 00 A4"))
        self.assertEqual(core.next_request(), b"")
        for byte in bytes.fromhex("5A 81 00 10 00 10 32 01 E8"):
            core.feed(bytes([byte]))
        self.assertEqual(core.state, core.READY)
        with self.assertRaises(ValueError):
            core.start(49, 1, 0, 1, 1)
        core.start(49, 0, 0, 1, 1)
        self.assertEqual(core.next_request(), bytes.fromhex("A5 02 31 00 00 96"))
        core.feed(bytes.fromhex("5A 82 00 D8"))
        self.assertEqual(core.next_request(), bytes.fromhex("A5 03 00 00 00 A6"))

    def test_error_response_is_short_even_for_info(self):
        core = NativeAnalyzer()
        core.next_request()
        core.feed(bytes.fromhex("5A 81 01 DA"))
        self.assertEqual(core.state, core.ERROR)
        self.assertEqual(core.get(1), 3)

    def test_partial_response_times_out_without_retry(self):
        core = NativeAnalyzer()
        core.next_request()
        core.feed(bytes.fromhex("5A 81 00"))
        core.tick(1000)
        self.assertEqual(core.get(1), 4)
        self.assertEqual(core.next_request(), b"")

    def test_demo_export_uses_capture_rate_not_current_ui_settings(self):
        core = NativeAnalyzer()
        core.reset(demo=True)
        core.start(49)
        capture = core.capture()
        self.assertEqual(len(capture.samples), 4096)
        self.assertEqual(capture.sample_rate, 1000000)
        self.assertEqual(capture.trigger_index, 2048)
        self.assertTrue(capture.demo)
        with tempfile.TemporaryDirectory() as directory:
            path = Path(directory)/"capture.csv"
            capture.save_csv(path)
            rows = path.read_text().splitlines()
            self.assertEqual(len(rows), 4097)
            self.assertIn("time_s", rows[0])
            self.assertEqual(rows[2049].split(",")[1], "0.0")


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