jesse-uxandGrok (agent loop)
b35c424945
Rahu uses the circular unique start. Output keys are unchanged. Upstream arc and clock tests passed. Co-Authored-By: Grok (agent loop)
573 lines
21 KiB
Python
573 lines
21 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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"""
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ashtottari_dasha.py — Ashtottari Dasha System (108-Year Cycle)
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Reference: Brihat Parashara Hora Shastra (BPHS), Chapter 19
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Ashtottari Dasha is a conditional dasha system with a total cycle of 108 years.
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It is applicable only when the Moon is in specific Nakshatras:
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- Krishna Paksha (waning Moon): Rohini, Ardra, Pushya, Ashlesha, Magha, Revati
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- Shukla Paksha (waxing Moon): Ashwini, Mrigashira, Punarvasu, Chitra, Shravana, Dhanishta
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The 8 planetary lords and their year allotments:
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1. Sun — 6 years
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2. Moon — 15 years
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3. Mars — 8 years
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4. Mercury — 17 years
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5. Saturn — 10 years
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6. Jupiter — 19 years
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7. Rahu — 12 years
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8. Venus — 21 years
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Total: 6 + 15 + 8 + 17 + 10 + 19 + 12 + 21 = 108 years.
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The dasha sequence always runs: Sun → Moon → Mars → Mercury → Saturn → Jupiter → Rahu → Venus.
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The starting lord is determined by the Moon's Nakshatra at birth.
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"""
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from datetime import datetime, timedelta
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from ashtottari_rule_profiles import (
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RULE_FAMILY_MOON_NAKSHATRA_PLUS_PAKSHA,
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RULE_FAMILY_RAHU_FROM_LAGNA_LORD,
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SHUKLA_PAKSHA_NAKSHATRAS,
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KRISHNA_PAKSHA_NAKSHATRAS,
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evaluate_moon_nakshatra_plus_paksha_rule,
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evaluate_rahu_from_lagna_lord_rule,
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)
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# ---------------------------------------------------------------------------
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# Constants
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# ---------------------------------------------------------------------------
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# Nakshatra indices (0-based): Ashwini=0, Bharani=1, ..., Revati=26
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NAKSHATRAS = [
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"Ashwini", "Bharani", "Krittika", "Rohini", "Mrigashira", "Ardra",
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"Punarvasu", "Pushya", "Ashlesha", "Magha", "Purva Phalguni",
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"Uttara Phalguni", "Hasta", "Chitra", "Swati", "Vishakha",
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"Anuradha", "Jyeshtha", "Mula", "Purva Ashadha", "Uttara Ashadha",
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"Shravana", "Dhanishta", "Shatabhisha", "Purva Bhadrapada",
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"Uttara Bhadrapada", "Revati"
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]
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# PVR Integrated Approach Table 39 angular arcs over the 27 named stars.
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# This profile includes the reduced Saturn arc and circular Rahu arc.
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# Applicability and child-period profiles remain separate choices.
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_CANDIDATE_NAKSHATRA_STARTING_LORDS = {
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"Ardra": "Sun",
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"Punarvasu": "Sun",
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"Pushya": "Sun",
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"Ashlesha": "Sun",
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"Magha": "Moon",
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"Purva Phalguni": "Moon",
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"Uttara Phalguni": "Moon",
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"Hasta": "Mars",
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"Chitra": "Mars",
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"Swati": "Mars",
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"Vishakha": "Mars",
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"Anuradha": "Mercury",
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"Jyeshtha": "Mercury",
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"Mula": "Mercury",
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"Purva Ashadha": "Saturn",
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"Uttara Ashadha": "Saturn",
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"Shravana": "Saturn",
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"Dhanishta": "Jupiter",
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"Shatabhisha": "Jupiter",
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"Purva Bhadrapada": "Jupiter",
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"Uttara Bhadrapada": "Rahu",
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"Revati": "Rahu",
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"Ashwini": "Rahu",
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"Bharani": "Rahu",
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"Krittika": "Venus",
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"Rohini": "Venus",
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"Mrigashira": "Venus",
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}
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# Ashtottari planetary sequence and year allotments (BPHS Ch.19)
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DASHA_SEQUENCE = [
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{"planet": "Sun", "years": 6},
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{"planet": "Moon", "years": 15},
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{"planet": "Mars", "years": 8},
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{"planet": "Mercury", "years": 17},
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{"planet": "Saturn", "years": 10},
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{"planet": "Jupiter", "years": 19},
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{"planet": "Rahu", "years": 12},
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{"planet": "Venus", "years": 21},
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]
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TOTAL_CYCLE = 108 # years
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_PLANET_ABBR = {
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"Sun": "Su",
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"Moon": "Mo",
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"Mars": "Ma",
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"Mercury": "Me",
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"Saturn": "Sa",
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"Jupiter": "Ju",
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"Rahu": "Ra",
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"Venus": "Ve",
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}
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# Mapping from starting Nakshatra index to first dasha lord index in DASHA_SEQUENCE
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# Per BPHS Ch.19:
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# - Rohini (3), Ardra (5), Pushya (7), Ashlesha (8), Magha (9), Revati (26)
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# → start from Sun (0)
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# - Ashwini (0), Mrigashira (4), Punarvasu (6)
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# → start from Mars (2)
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# - Chitra (13), Shravana (20), Dhanishta (22)
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# → start from Jupiter (5)
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STARTING_LORD_MAP = {
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3: 0, # Rohini -> Sun
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5: 0, # Ardra -> Sun
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7: 0, # Pushya -> Sun
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8: 0, # Ashlesha -> Sun
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9: 0, # Magha -> Sun
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26: 0, # Revati -> Sun
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0: 2, # Ashwini -> Mars
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4: 2, # Mrigashira -> Mars
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6: 2, # Punarvasu -> Mars
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13: 5, # Chitra -> Jupiter
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20: 5, # Shravana -> Jupiter
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22: 5, # Dhanishta -> Jupiter
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}
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# ---------------------------------------------------------------------------
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# Core Functions
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# ---------------------------------------------------------------------------
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def is_ashtottari_applicable(moon_nakshatra_index: int, is_shukla_paksha: bool) -> bool:
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"""
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Check whether Ashtottari Dasha is applicable for the given birth conditions.
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Args:
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moon_nakshatra_index: 0-based index of Moon's Nakshatra (0 = Ashwini).
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is_shukla_paksha: True if birth is in Shukla Paksha (waxing Moon), else False.
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Returns:
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bool: True if Ashtottari Dasha applies.
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"""
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applicable, _ = evaluate_moon_nakshatra_plus_paksha_rule(moon_nakshatra_index, is_shukla_paksha)
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return applicable
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def _moon_nakshatra_name(moon_nakshatra_index: int) -> str:
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if moon_nakshatra_index is None:
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return "unknown"
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try:
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return NAKSHATRAS[moon_nakshatra_index]
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except Exception:
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return "unknown"
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def _candidate_nakshatra_starting_lord(moon_nakshatra_index: int) -> str:
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return _CANDIDATE_NAKSHATRA_STARTING_LORDS.get(_moon_nakshatra_name(moon_nakshatra_index), "Sun")
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def _candidate_lord_nakshatra_span(starting_planet: str) -> tuple[int, int] | tuple[None, None]:
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matching = [
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idx for idx, name in enumerate(NAKSHATRAS)
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if _CANDIDATE_NAKSHATRA_STARTING_LORDS.get(name) == starting_planet
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]
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if not matching:
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return None, None
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# Table 39 has a circular Rahu arc: Uttara Bhadrapada through Bharani.
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# min/max would incorrectly turn that four-star arc into the full zodiac.
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starts = [idx for idx in matching if (idx - 1) % 27 not in matching]
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if len(starts) != 1:
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return None, None
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return starts[0], starts[0] + len(matching) - 1
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def _years_to_balance_parts(years: float) -> dict:
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total_days = max(years, 0.0) * 365.256364
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whole_years = int(total_days // 365.256364)
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remaining_days = total_days - whole_years * 365.256364
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whole_months = int(remaining_days // 30.0)
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residual_days = remaining_days - whole_months * 30.0
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day_count = int(round(residual_days))
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if residual_days > 0:
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day_count += 1
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if day_count >= 30:
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whole_months += day_count // 30
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day_count = day_count % 30
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if whole_months >= 12:
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whole_years += whole_months // 12
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whole_months = whole_months % 12
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return {
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"years": years,
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"years_whole": whole_years,
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"months_whole": whole_months,
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"days_whole": day_count,
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}
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def _years_to_balance_parts_360(years: float) -> dict:
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total_days = max(years, 0.0) * 360.0
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whole_years = int(total_days // 360.0)
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remaining_days = total_days - whole_years * 360.0
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whole_months = int(remaining_days // 30.0)
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residual_days = remaining_days - whole_months * 30.0
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day_count = int(round(residual_days))
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if residual_days > 0:
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day_count += 1
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if day_count >= 30:
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whole_months += day_count // 30
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day_count = day_count % 30
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if whole_months >= 12:
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whole_years += whole_months // 12
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whole_months = whole_months % 12
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return {
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"years": years,
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"years_whole": whole_years,
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"months_whole": whole_months,
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"days_whole": day_count,
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}
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def _calc_candidate_balance_and_birth_chain(moon_longitude: float, starting_planet: str) -> tuple[dict | None, dict | None]:
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start_nak_idx, end_nak_idx = _candidate_lord_nakshatra_span(starting_planet)
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if start_nak_idx is None or end_nak_idx is None:
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return None, None
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segment_start = start_nak_idx * 40.0 / 3.0
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segment_end = (end_nak_idx + 1) * 40.0 / 3.0
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longitude = float(moon_longitude) % 360.0
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if segment_end > 360 and longitude < segment_start:
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longitude += 360
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if not (segment_start <= longitude < segment_end):
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return None, None
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span = segment_end - segment_start
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elapsed = longitude - segment_start
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remaining_ratio = max(0.0, min(1.0, (segment_end - longitude) / span))
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md_years = next(lord["years"] for lord in DASHA_SEQUENCE if lord["planet"] == starting_planet)
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remaining_years = md_years * remaining_ratio
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def _sequence_from(lord: str) -> list[str]:
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idx = next(i for i, item in enumerate(DASHA_SEQUENCE) if item["planet"] == lord)
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planets = [item["planet"] for item in DASHA_SEQUENCE]
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return planets[idx:] + planets[:idx]
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def _child_periods(parent_lord: str, parent_duration_years: float) -> list[dict]:
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rows = []
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for child_lord in _sequence_from(parent_lord):
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child_years = parent_duration_years * next(
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item["years"] for item in DASHA_SEQUENCE if item["planet"] == child_lord
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) / TOTAL_CYCLE
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rows.append({"lord": child_lord, "years": child_years})
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return rows
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elapsed_in_md = md_years - remaining_years
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hierarchy = [starting_planet]
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parent_lord = starting_planet
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parent_duration = md_years
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elapsed_within_parent = elapsed_in_md
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for _depth in range(4):
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rows = _child_periods(parent_lord, parent_duration)
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cursor = 0.0
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selected = rows[-1]
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for row in rows:
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next_cursor = cursor + row["years"]
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if cursor <= elapsed_within_parent < next_cursor:
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selected = row
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elapsed_within_parent = elapsed_within_parent - cursor
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break
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cursor = next_cursor
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hierarchy.append(selected["lord"])
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parent_lord = selected["lord"]
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parent_duration = selected["years"]
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balance = {
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"planet": starting_planet,
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"segment_start_nakshatra": NAKSHATRAS[start_nak_idx],
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"segment_end_nakshatra": NAKSHATRAS[end_nak_idx % 27],
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"segment_span_nakshatras": end_nak_idx - start_nak_idx + 1,
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"display_calendar": "360_day_traditional",
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**_years_to_balance_parts_360(remaining_years),
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}
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birth_chain = {
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"lords": hierarchy,
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"compact": "-".join(_PLANET_ABBR.get(lord, lord[:2]) for lord in hierarchy),
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}
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return balance, birth_chain
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def _timeline_start_with_birth_balance(
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birth_dt: datetime,
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moon_longitude,
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starting_planet: str,
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) -> tuple[datetime, bool]:
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"""Shift the first mahadasha so birth falls inside the elapsed portion.
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Both applicability families use the starting lord's nakshatra group. When
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the Moon longitude is missing, or it does not fall in that group, the
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timeline stays on the birth instant.
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"""
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if moon_longitude is None:
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return birth_dt, False
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balance, _birth_chain = _calc_candidate_balance_and_birth_chain(
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moon_longitude=float(moon_longitude),
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starting_planet=starting_planet,
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)
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if balance is None:
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return birth_dt, False
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md_years = next(lord["years"] for lord in DASHA_SEQUENCE if lord["planet"] == starting_planet)
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elapsed_years = md_years - float(balance["years"])
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if elapsed_years == 0:
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return birth_dt, False
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return birth_dt - timedelta(days=elapsed_years * 365.25), True
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def _shift_period_tree(value, shift: timedelta):
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"""Copy a period tree and move every stored instant by the same cycle shift."""
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if isinstance(value, list):
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return [_shift_period_tree(item, shift) for item in value]
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if isinstance(value, dict):
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shifted = {}
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for key, item in value.items():
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if key in ("start_date", "end_date") and isinstance(item, str):
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shifted[key] = (datetime.fromisoformat(item) + shift).isoformat()
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else:
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shifted[key] = _shift_period_tree(item, shift)
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return shifted
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return value
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def _current_period_on_cycle(major_periods: list, birth_dt: datetime, now: datetime) -> dict | None:
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"""Second and later cycles move child dates with the parent. Birth row stays put."""
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if not major_periods or now < birth_dt:
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return None
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cycle_duration = timedelta(days=TOTAL_CYCLE * 365.25)
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cycle_index = (now - birth_dt) // cycle_duration
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shift = cycle_index * cycle_duration
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for period in major_periods:
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start = datetime.fromisoformat(period["start_date"]) + shift
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end = datetime.fromisoformat(period["end_date"]) + shift
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if start <= now < end:
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current = _shift_period_tree(period, shift)
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current["elapsed_years"] = (now - start).total_seconds() / (86400 * 365.25)
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current["remaining_years"] = (end - now).total_seconds() / (86400 * 365.25)
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current["cycle_number"] = cycle_index + 1
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return current
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return None
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def _build_major_periods(start_lord_idx: int, birth_date: datetime) -> list:
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"""
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Build the full list of major periods (Mahadashas) given the starting lord.
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Returns a list of dicts with keys: planet, years, start_date, end_date.
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"""
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periods = []
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seq_len = len(DASHA_SEQUENCE)
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current_date = birth_date
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for i in range(seq_len):
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idx = (start_lord_idx + i) % seq_len
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lord = DASHA_SEQUENCE[idx]
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end_date = current_date + timedelta(days=lord["years"] * 365.25)
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periods.append({
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"planet": lord["planet"],
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"years": lord["years"],
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"start_date": current_date.isoformat(),
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"end_date": end_date.isoformat(),
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})
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current_date = end_date
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return periods
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def _sequence_from_lord(starting_planet: str) -> list[dict]:
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start_idx = next(
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idx for idx, lord in enumerate(DASHA_SEQUENCE) if lord["planet"] == starting_planet
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)
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return DASHA_SEQUENCE[start_idx:] + DASHA_SEQUENCE[:start_idx]
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def _build_subperiods(parent_period: dict, level_key: str) -> list[dict]:
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start_dt = datetime.fromisoformat(parent_period["start_date"])
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current_dt = start_dt
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child_periods = []
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for lord in _sequence_from_lord(parent_period["planet"]):
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child_years = float(parent_period["years"]) * float(lord["years"]) / float(TOTAL_CYCLE)
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end_dt = current_dt + timedelta(days=child_years * 365.25)
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child_periods.append({
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"level": level_key,
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"planet": lord["planet"],
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"lord": lord["planet"],
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"years": child_years,
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"start_date": current_dt.isoformat(),
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"end_date": end_dt.isoformat(),
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"status": "parameter_sensitive",
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"derivation": "native_ashtottari_recursive_proportional_variant",
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})
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current_dt = end_dt
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if child_periods:
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child_periods[-1]["end_date"] = parent_period["end_date"]
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return child_periods
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def _attach_recursive_subperiods(major_periods: list[dict]) -> tuple[list[dict], list[dict]]:
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all_antardashas = []
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all_pratyantardashas = []
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for period in major_periods:
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antardasha = _build_subperiods(period, "antardasha")
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period["antardasha"] = antardasha
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all_antardashas.extend(antardasha)
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for child in antardasha:
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pratyantardasha = _build_subperiods(child, "pratyantardasha")
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child["pratyantardasha"] = pratyantardasha
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all_pratyantardashas.extend(pratyantardasha)
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return all_antardashas, all_pratyantardashas
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def calculate_ashtottari_dasha(birth_info: dict) -> dict:
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"""
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Calculate Ashtottari Dasha for a native.
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Args:
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birth_info: dict containing:
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- "moon_nakshatra_index": int (0-26)
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- "is_shukla_paksha": bool
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- "birth_datetime": datetime object or ISO-format string
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Returns:
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dict with keys:
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- "applicable": bool — whether this dasha system applies
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- "major": list of major period dicts (planet, years, start/end dates)
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- "current": dict — the currently running major period
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- "total_cycle": int — 108
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- "starting_planet": str — first dasha lord
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"""
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moon_idx = birth_info.get("moon_nakshatra_index")
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is_shukla = birth_info.get("is_shukla_paksha", True)
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birth_dt = birth_info.get("birth_datetime")
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moon_longitude = birth_info.get("moon_longitude")
|
|
rule_family = birth_info.get("applicability_rule_family") or RULE_FAMILY_MOON_NAKSHATRA_PLUS_PAKSHA
|
|
|
|
if isinstance(birth_dt, str):
|
|
birth_dt = datetime.fromisoformat(birth_dt)
|
|
if birth_dt is None:
|
|
birth_dt = datetime.now()
|
|
|
|
if rule_family == RULE_FAMILY_RAHU_FROM_LAGNA_LORD:
|
|
applicable, applicability_reason = evaluate_rahu_from_lagna_lord_rule(birth_info)
|
|
starting_planet = _candidate_nakshatra_starting_lord(moon_idx)
|
|
else:
|
|
applicable, applicability_reason = evaluate_moon_nakshatra_plus_paksha_rule(moon_idx, is_shukla)
|
|
starting_planet = None
|
|
|
|
if not applicable:
|
|
result = {
|
|
"applicable": False,
|
|
"major": [],
|
|
"current": None,
|
|
"total_cycle": TOTAL_CYCLE,
|
|
"starting_planet": None,
|
|
"reason": f"Moon Nakshatra '{NAKSHATRAS[moon_idx]}' does not qualify for Ashtottari Dasha under {'Shukla' if is_shukla else 'Krishna'} Paksha.",
|
|
}
|
|
if rule_family == RULE_FAMILY_RAHU_FROM_LAGNA_LORD:
|
|
result.update({
|
|
"execution_status": "blocked",
|
|
"confidence_status": "blocked",
|
|
"verification_status": "unverified",
|
|
})
|
|
return result
|
|
|
|
if starting_planet is None:
|
|
start_lord_idx = STARTING_LORD_MAP.get(moon_idx, 0)
|
|
starting_planet = DASHA_SEQUENCE[start_lord_idx]["planet"]
|
|
else:
|
|
start_lord_idx = next(
|
|
idx for idx, lord in enumerate(DASHA_SEQUENCE) if lord["planet"] == starting_planet
|
|
)
|
|
|
|
timeline_start, _balance_shifted = _timeline_start_with_birth_balance(
|
|
birth_dt, moon_longitude, starting_planet,
|
|
)
|
|
major_periods = _build_major_periods(start_lord_idx, timeline_start)
|
|
antardasha_periods, pratyantardasha_periods = _attach_recursive_subperiods(major_periods)
|
|
|
|
# Later cycles repeat every 108 years. Child dates move with the parent.
|
|
# The birth row in major stays on the original timeline.
|
|
now = birth_info.get("as_of") or birth_info.get("today") or datetime.now()
|
|
if isinstance(now, str):
|
|
now = datetime.fromisoformat(now)
|
|
current_period = _current_period_on_cycle(major_periods, birth_dt, now)
|
|
|
|
result = {
|
|
"applicable": True,
|
|
"reference_date": now.isoformat(),
|
|
"major": major_periods,
|
|
"antardasha": antardasha_periods,
|
|
"pratyantardasha": pratyantardasha_periods,
|
|
"current": current_period,
|
|
"total_cycle": TOTAL_CYCLE,
|
|
"starting_planet": starting_planet,
|
|
}
|
|
if rule_family == RULE_FAMILY_RAHU_FROM_LAGNA_LORD:
|
|
result.update({
|
|
"execution_status": "executed",
|
|
"confidence_status": "parameter_sensitive",
|
|
"verification_status": "unverified",
|
|
})
|
|
return result
|
|
|
|
|
|
# ---------------------------------------------------------------------------
|
|
# Self-test
|
|
# ---------------------------------------------------------------------------
|
|
|
|
if __name__ == "__main__":
|
|
# Example 1: Applicable case — Moon in Rohini, Krishna Paksha
|
|
test_birth_1 = {
|
|
"moon_nakshatra_index": 3, # Rohini
|
|
"is_shukla_paksha": False, # Krishna Paksha
|
|
"birth_datetime": datetime(1990, 6, 15, 10, 30),
|
|
}
|
|
result_1 = calculate_ashtottari_dasha(test_birth_1)
|
|
print("=" * 60)
|
|
print("Test 1: Moon in Rohini, Krishna Paksha")
|
|
print("=" * 60)
|
|
print(f"Applicable: {result_1['applicable']}")
|
|
print(f"Starting Planet: {result_1['starting_planet']}")
|
|
print(f"Total Cycle: {result_1['total_cycle']} years")
|
|
print("Major Periods:")
|
|
for p in result_1["major"]:
|
|
print(f" {p['planet']:10s} | {p['years']:2d} years | {p['start_date'][:10]} → {p['end_date'][:10]}")
|
|
print(f"Current Period: {result_1['current']}")
|
|
print()
|
|
|
|
# Example 2: Applicable case — Moon in Ashwini, Shukla Paksha
|
|
test_birth_2 = {
|
|
"moon_nakshatra_index": 0, # Ashwini
|
|
"is_shukla_paksha": True, # Shukla Paksha
|
|
"birth_datetime": datetime(1985, 3, 20, 8, 0),
|
|
}
|
|
result_2 = calculate_ashtottari_dasha(test_birth_2)
|
|
print("=" * 60)
|
|
print("Test 2: Moon in Ashwini, Shukla Paksha")
|
|
print("=" * 60)
|
|
print(f"Applicable: {result_2['applicable']}")
|
|
print(f"Starting Planet: {result_2['starting_planet']}")
|
|
print(f"Total Cycle: {result_2['total_cycle']} years")
|
|
for p in result_2["major"]:
|
|
print(f" {p['planet']:10s} | {p['years']:2d} years | {p['start_date'][:10]} → {p['end_date'][:10]}")
|
|
print(f"Current Period: {result_2['current']}")
|
|
print()
|
|
|
|
# Example 3: Non-applicable case — Moon in Bharani, Shukla Paksha
|
|
test_birth_3 = {
|
|
"moon_nakshatra_index": 1, # Bharani
|
|
"is_shukla_paksha": True,
|
|
"birth_datetime": datetime(2000, 1, 1, 0, 0),
|
|
}
|
|
result_3 = calculate_ashtottari_dasha(test_birth_3)
|
|
print("=" * 60)
|
|
print("Test 3: Moon in Bharani, Shukla Paksha (Non-applicable)")
|
|
print("=" * 60)
|
|
print(f"Applicable: {result_3['applicable']}")
|
|
print(f"Reason: {result_3['reason']}")
|