"""
Comparison test: engine output vs the sample `Accounts Receivable Aging (Jan-26) 1.xlsx`.

Extracts the sample's cached Detail/Summary cells and asserts the engine reproduces the
USA figures to the penny. Integration (reads large sample files); run with -m integration.
"""
from __future__ import annotations

from datetime import date

import pytest

from app.core.pipeline import process
from app.core.compare import compare_to_sample, read_cached_cells, list_sheets

pytestmark = pytest.mark.integration

RESERVES = {("USA", "Standard Orders"): 125.44, ("USA", "Invoiced Orders"): 0.0}


@pytest.fixture(scope="module")
def result(jan_files):
    return process(jan_files, month_end=date(2026, 1, 31), clearing_lag_days=2, reserves=RESERVES)


def test_detail_cells_match_sample(result, sample_workbook):
    diffs = compare_to_sample(result, sample_workbook, tolerance=1.0)
    report = "\n".join(
        f"  Detail!{d.cell:<4} {d.label:<45} expected={d.expected} generated={d.generated} "
        f"diff={d.difference} [{d.status}]" for d in diffs
    )
    print("\nCOMPARISON REPORT\n" + report)
    diffed = [d for d in diffs if d.status == "DIFF"]
    assert not diffed, f"cells differ from sample:\n{report}"


def test_summary_usa_matches_sample(result, sample_workbook):
    sm = read_cached_cells(sample_workbook, "Summary", {"B11"})
    usa = result.receivable.marketplaces["USA"]
    assert usa.receivable_usd == pytest.approx(sm["B11"], abs=1.0)   # 11,110,433


def test_sample_has_expected_sheets(sample_workbook):
    sheets = list_sheets(sample_workbook)
    assert sheets[:3] == ["Summary", "Detail", "COA"]
    # the sample splits USA into two tabs — our generator mirrors that split
    assert any(s.startswith("USA") for s in sheets)