"""Phase 2 PoC #5 — pair_trawl_tier DEFAULT_PARAMS ↔ seed SQL 정적 일치."""
from __future__ import annotations

import importlib
import json
import os
import sys
import types
import unittest

if 'pandas' not in sys.modules:
    pd_stub = types.ModuleType('pandas')
    pd_stub.DataFrame = type('DataFrame', (), {})
    pd_stub.Timestamp = type('Timestamp', (), {})
    sys.modules['pandas'] = pd_stub

if 'pydantic_settings' not in sys.modules:
    stub = types.ModuleType('pydantic_settings')

    class _S:
        def __init__(self, **kw):
            for name, value in self.__class__.__dict__.items():
                if name.isupper():
                    setattr(self, name, kw.get(name, value))

    stub.BaseSettings = _S
    sys.modules['pydantic_settings'] = stub

if 'algorithms' not in sys.modules:
    pkg = types.ModuleType('algorithms')
    pkg.__path__ = [os.path.join(os.path.dirname(__file__), '..', 'algorithms')]
    sys.modules['algorithms'] = pkg


class PairTrawlParamsTest(unittest.TestCase):

    def test_seed_matches_default(self):
        pt = importlib.import_module('algorithms.pair_trawl')
        seed_path = os.path.join(
            os.path.dirname(__file__), '..',
            'models_core', 'seeds', 'v1_pair_trawl.sql',
        )
        with open(seed_path, 'r', encoding='utf-8') as f:
            sql = f.read()
        start = sql.index('$json$') + len('$json$')
        end = sql.index('$json$', start)
        params = json.loads(sql[start:end].strip())
        self.assertEqual(params, pt.PAIR_TRAWL_DEFAULT_PARAMS)

    def test_default_values_match_module_constants(self):
        pt = importlib.import_module('algorithms.pair_trawl')
        d = pt.PAIR_TRAWL_DEFAULT_PARAMS
        self.assertEqual(d['strong']['proximity_nm'], pt.PROXIMITY_NM)
        self.assertEqual(d['strong']['sog_delta_max'], pt.SOG_DELTA_MAX)
        self.assertEqual(d['strong']['cog_delta_max'], pt.COG_DELTA_MAX)
        self.assertEqual(d['strong']['min_sync_cycles'], pt.MIN_SYNC_CYCLES)
        self.assertEqual(d['strong']['simultaneous_gap_min'], pt.SIMULTANEOUS_GAP_MIN)
        self.assertEqual(d['probable']['min_block_cycles'], pt.PROBABLE_MIN_BLOCK_CYCLES)
        self.assertEqual(d['probable']['min_sync_ratio'], pt.PROBABLE_MIN_SYNC_RATIO)
        self.assertEqual(d['suspect']['min_block_cycles'], pt.SUSPECT_MIN_BLOCK_CYCLES)
        self.assertEqual(d['suspect']['min_sync_ratio'], pt.SUSPECT_MIN_SYNC_RATIO)
        self.assertEqual(d['candidate_scan']['cell_size_deg'], pt.CELL_SIZE)


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