"""Source-bounded regression tests for Chaturshitisama MD."""

from __future__ import annotations

import json
from datetime import datetime
from pathlib import Path

from scripts.chaturshitisama_dasha import (
    calculate_chaturshitisama_dasha,
    chaturshitisama_applicability,
)


ROOT = Path(__file__).resolve().parents[1]


def test_chaturshitisama_requires_tenth_lord_in_tenth() -> None:
    result = chaturshitisama_applicability(ascendant_longitude=0.0, tenth_lord_sign_index=9)

    assert result["applicable"] is True
    assert result["ascendant_sign_index"] == 0
    assert result["tenth_house_sign_index"] == 9


def test_chaturshitisama_rejects_other_tenth_lord_positions() -> None:
    result = chaturshitisama_applicability(ascendant_longitude=0.0, tenth_lord_sign_index=10)

    assert result["applicable"] is False
    assert result["reason"] == "Chaturshitisama requires the 10th lord to occupy the 10th house."


def test_chaturshitisama_blocks_without_explicit_lord_position() -> None:
    result = calculate_chaturshitisama_dasha({
        "birth_datetime": "2000-01-01T00:00:00",
        "ascendant_longitude": 0.0,
        "moon_longitude": 190.0,
    })

    assert result["execution_status"] == "blocked"
    assert "tenth_lord_sign_index" in result["reason"]


def test_chaturshitisama_emits_only_source_bounded_md() -> None:
    result = calculate_chaturshitisama_dasha({
        "birth_datetime": datetime(2000, 1, 1, 12, 0),
        "ascendant_longitude": 0.0,
        "tenth_lord_sign_index": 9,
        "moon_longitude": 190.0,
    })

    assert result["execution_status"] == "executed"
    assert result["confidence_status"] == "parameter_sensitive"
    assert result["total_cycle"] == 84
    assert result["starting_lord"] == "Sun"  # Swati is the seed.
    assert result["major"][0]["start_date"] == "2000-01-01T12:00:00"
    assert result["major"][0]["years"] < 12.0
    assert result["period_depth_status"] == "mahadasha_executed_ad_pd_blocked_pending_row_level_replay"
    assert "antardasha" not in result["major"][0]


def test_chaturshitisama_standard_table_profile_preserves_unmet_gate_but_emits_rows() -> None:
    result = calculate_chaturshitisama_dasha({
        "birth_datetime": "2000-01-01T12:00:00",
        "ascendant_longitude": 0.0,
        "tenth_lord_sign_index": 10,
        "moon_longitude": 190.0,
        "standard_table_profile": "pl9_reports_all_dasha_tables_v1",
    })

    assert result["execution_status"] == "executed"
    assert result["classical_applicable"] is False
    assert result["standard_table_profile"] == "pl9_reports_all_dasha_tables_v1"
    assert len(result["major"]) == 7