import json
import unittest
from pathlib import Path

from block import __main__


BASE_DIR = Path(__file__).resolve().parent

data = {
    "hd_score_m1": 1173.0,
    "hd_score_g1": 1203.0,
    "hd_score_s1": 1240.0,
    "hd_score_s2": 0,
    "hd_score_s3": 0,
    "hd_score_iso_m2": 1001.0,
    "hd_score_g2": 0.0,
}


def score_data(**overrides):
    values = {
        "hd_score_m1": 1100.0,
        "hd_score_g1": 0.0,
        "hd_score_s1": 0.0,
        "hd_score_s2": 0.0,
        "hd_score_s3": 0.0,
        "hd_score_iso_m2": 1001.0,
        "hd_score_g2": 0.0,
        "hd_score_s4": 0.0,
    }
    values.update(overrides)
    return values


class TestBlock(unittest.TestCase):
    def test_main_success(self):
        block_result = __main__(**data)

        self.assertIsInstance(block_result, dict, "Result should be a dictionary.")
        self.assertIn("hd_score", block_result, "Result dictionary should contain 'hd_score' if success.")

    def test_s4_sets_review_application_when_no_decline(self):
        block_result = __main__(**score_data(hd_score_s4=1191))

        self.assertEqual(block_result["hd_score"], 1191)
        self.assertEqual(block_result["recommended_action"], "Review Application")
        self.assertEqual(block_result["hd_action_reasoncode"], "S4 Velocity Triggered")
        self.assertIn("Review Application", block_result["description"])

    def test_s4_review_can_use_top_of_reserved_band(self):
        block_result = __main__(**score_data(hd_score_s4=1200))

        self.assertEqual(block_result["hd_score"], 1200)
        self.assertEqual(block_result["recommended_action"], "Review Application")

    def test_decline_precedence_beats_s4_review(self):
        block_result = __main__(**score_data(hd_score_s1=1225, hd_score_s4=1200))

        self.assertEqual(block_result["hd_score"], 1225)
        self.assertEqual(block_result["recommended_action"], "Decline Application")
        self.assertEqual(block_result["hd_action_reasoncode"], "S1 Triggered")

    def test_non_s4_pass_score_in_reserved_band_shifts_down(self):
        block_result = __main__(**score_data(hd_score_m1=1195, hd_score_s4=0))

        self.assertEqual(block_result["hd_score"], 1185)
        self.assertEqual(block_result["recommended_action"], "Pass Application")
        self.assertEqual(block_result["hd_action_reasoncode"], "Pass")

    def test_non_s4_pass_score_below_reserved_band_stays_same(self):
        block_result = __main__(**score_data(hd_score_m1=1190, hd_score_s4=0))

        self.assertEqual(block_result["hd_score"], 1190)
        self.assertEqual(block_result["recommended_action"], "Pass Application")

    def test_request_schema_adds_s4_and_response_schema_is_unchanged(self):
        request_schema = json.loads((BASE_DIR / "request_schema.json").read_text())
        response_schema = json.loads((BASE_DIR / "response_schema.json").read_text())

        self.assertEqual(request_schema["properties"]["hd_score_s4"]["type"], ["number", "null"])
        self.assertEqual(
            set(response_schema["properties"]),
            {"hd_score", "recommended_action", "description", "hd_action_reasoncode"},
        )


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