#!/usr/bin/env python3
"""Reproduce Linden Peak's intangible, goodwill, and impairment close.

Run from the repository root with ``uv run python`` and this file's path.

The script uses supplied useful lives, acquisition-date values, reporting unit,
and fair values. It does not perform valuation or choose an accounting model.
"""


def money(amount: float) -> str:
    """Format a number as accounting-style US dollars."""
    return f"${amount:,.2f}"


def show_section(title: str) -> None:
    print(f"\n{title}")
    print("-" * len(title))


show_section("1. Finite-life amortization")

license_cost = 240_000.00
license_life_months = 72
license_elapsed_months = 9
license_monthly_amortization = license_cost / license_life_months
license_amortization = license_monthly_amortization * license_elapsed_months
license_ending_carrying_amount = license_cost - license_amortization

customer_relationship_cost = 600_000.00
customer_relationship_life_months = 120
customer_relationship_elapsed_months = 12
customer_relationship_monthly_amortization = (
    customer_relationship_cost / customer_relationship_life_months
)
customer_relationship_amortization = (
    customer_relationship_monthly_amortization * customer_relationship_elapsed_months
)
customer_relationship_ending_carrying_amount = (
    customer_relationship_cost - customer_relationship_amortization
)

print(f"{'License: $240,000 / 72 months x 9':<48} {money(license_amortization):>16}")
print(
    f"{'Customer relationship: $600,000 / 120 x 12':<48} "
    f"{money(customer_relationship_amortization):>16}"
)
total_period_amortization = license_amortization + customer_relationship_amortization
print(f"{'Total period amortization':<48} {money(total_period_amortization):>16}")
print(f"{'License ending carrying amount':<48} {money(license_ending_carrying_amount):>16}")
print(
    f"{'Customer relationship ending carrying amount':<48} "
    f"{money(customer_relationship_ending_carrying_amount):>16}"
)


show_section("2. Acquisition allocation and goodwill")
consideration = 4_800_000.00
identifiable_assets = {
    "Cash": 250_000.00,
    "Receivables": 750_000.00,
    "Property, plant, and equipment": 1_800_000.00,
    "Customer relationship": 600_000.00,
    "Patented technology": 1_000_000.00,
    "Trade name": 950_000.00,
    "Acquired IPR&D": 300_000.00,
}
liabilities_assumed = 1_550_000.00

for label, amount in identifiable_assets.items():
    print(f"{label:<48} {money(amount):>16}")
total_identifiable_assets = sum(identifiable_assets.values())
identifiable_net_assets = total_identifiable_assets - liabilities_assumed
goodwill = consideration - identifiable_net_assets
if goodwill < 0:
    raise SystemExit("STOP: apparent bargain purchase requires reassessment")

print(f"{'Identifiable assets':<48} {money(total_identifiable_assets):>16}")
print(f"{'Liabilities assumed':<48} {money(liabilities_assumed):>16}")
print(f"{'Identifiable net assets':<48} {money(identifiable_net_assets):>16}")
print(f"{'Consideration':<48} {money(consideration):>16}")
print(f"{'Residual goodwill':<48} {money(goodwill):>16}")


show_section("3. Separate impairment lanes")
trade_name_carrying_amount = 900_000.00
trade_name_fair_value = 760_000.00
trade_name_impairment = max(trade_name_carrying_amount - trade_name_fair_value, 0.00)

reporting_unit_carrying_amount = 5_400_000.00
reporting_unit_fair_value = 5_050_000.00
goodwill_carrying_amount = 700_000.00
reporting_unit_excess = max(reporting_unit_carrying_amount - reporting_unit_fair_value, 0.00)
goodwill_impairment = min(reporting_unit_excess, goodwill_carrying_amount)
ending_goodwill = goodwill_carrying_amount - goodwill_impairment

print(f"{'Trade-name impairment':<48} {money(trade_name_impairment):>16}")
print(f"{'Reporting-unit excess':<48} {money(reporting_unit_excess):>16}")
print(f"{'Goodwill impairment':<48} {money(goodwill_impairment):>16}")
print(f"{'Ending goodwill':<48} {money(ending_goodwill):>16}")


checks = {
    "period amortization": license_amortization + customer_relationship_amortization - 90_000,
    "identifiable assets": total_identifiable_assets - 5_650_000,
    "identifiable net assets": identifiable_net_assets - 4_100_000,
    "goodwill": goodwill - 700_000,
    "trade-name impairment": trade_name_impairment - 140_000,
    "goodwill impairment": goodwill_impairment - 350_000,
}
failed = [label for label, difference in checks.items() if abs(difference) > 0.005]
if failed:
    raise SystemExit(f"FAIL: {', '.join(failed)}")
print("\nPASS: amortization, allocation, goodwill, and impairment amounts reconcile.")
print("Boundary: PASS does not approve useful lives, values, reporting units, or elections.")