"""BUG-1321: the API fallback dasha year matches dasha_analyzer's 365.25 days.

Upstream 4d543209. The two 365.25636 constants in the API server made the
fallback timeline and the years-into-mahadasha figure drift from the analyzer.
"""

from __future__ import annotations

import importlib.util
import os
import sys
from datetime import datetime

SCRIPTS = os.path.join(os.path.dirname(__file__), "..", "scripts")
if SCRIPTS not in sys.path:
    sys.path.insert(0, SCRIPTS)


def _api_handler():
    """Reuse the existing unbound handler helper. Do not add another forgery site."""
    path = os.path.join(os.path.dirname(__file__), "test_api_server_security.py")
    spec = importlib.util.spec_from_file_location("_api_security_helpers_dasha", path)
    module = importlib.util.module_from_spec(spec)
    spec.loader.exec_module(module)
    return module._handler()


def test_placeholder_fallback_periods_are_gone() -> None:
    """原值：_fallback_dasha_periods 用 365.25 日对齐分析器。

    新值：该方法不存在。
    原因：占位回退会编造周期，BUG-1341 要求删掉；仍在用的年长对齐由下一条 years_into 测试锁住。
    """
    handler = _api_handler()
    assert not hasattr(handler, "_fallback_dasha_periods")
    source = open(
        os.path.join(os.path.dirname(__file__), "..", "scripts", "jyotish_api_server.py"),
        encoding="utf-8",
    ).read()
    assert "_fallback_dasha_periods" not in source
    assert "precision = 'generic'" not in source
    assert "precision = 'calculator'" not in source


def test_years_into_mahadasha_uses_the_analyzer_year() -> None:
    birth = datetime(2000, 1, 1)
    today = datetime(2003, 1, 1)
    handler = _api_handler()
    layer = handler._compute_vimshottari_analysis_layer(birth, 0.0, current_date="2003-01-01")
    days = (today - birth).days
    years_into = layer["five_levels"]["mahadasha"]["years_into_period"]
    assert years_into == days / 365.25
    assert years_into != days / 365.25636