"""Analytics endpoints: category aggregation (Decimal regression) and the
arbitrary date-range filters added for the Analytics range picker."""

from datetime import datetime
from decimal import Decimal

from app.api.v1.endpoints.analytics import daily_spending, spending_by_category
from app.models.models import Category, Transaction

from tests.test_installments import make_cc_tx


def seed(session):
    cat = Category(name="Groceries")
    session.add(cat)
    session.commit()
    make_cc_tx(session, merchant="A", amount="1000.50", reference="a1",
               date=datetime(2026, 6, 2), category_id=cat.id)
    make_cc_tx(session, merchant="B", amount="2000.00", reference="b1",
               date=datetime(2026, 6, 20))
    return cat


class TestSpendingByCategory:
    def test_decimal_sum_does_not_crash_and_percentages_add_up(self, session):
        """Regression: Decimal grand total vs float row total raised
        TypeError, 500ing the endpoint whenever it had data."""
        seed(session)
        rows = spending_by_category(session=session, _user="t")
        assert {r.category_name for r in rows} == {"Groceries", "Uncategorized"}
        assert sum(r.percentage for r in rows) == 100.0

    def test_date_range_overrides_cycle(self, session):
        seed(session)
        rows = spending_by_category(
            start_date="2026-06-01",
            end_date="2026-06-10",
            cycle_year=2026,
            cycle_month=1,  # would match nothing; range must win
            session=session,
            _user="t",
        )
        assert len(rows) == 1
        assert rows[0].category_name == "Groceries"
        assert rows[0].total == 1000.50


class TestDailySpending:
    def test_date_range_filter(self, session):
        seed(session)
        rows = daily_spending(
            start_date="2026-06-15", end_date="2026-07-01",
            session=session, _user="t",
        )
        assert [r.date for r in rows] == ["2026-06-20"]
        assert rows[0].total == 2000.00

    def test_future_cuotas_excluded(self, session):
        make_cc_tx(session, merchant="FUTURE", amount="500.00",
                   reference="f1", date=datetime(2030, 1, 19))
        rows = daily_spending(session=session, _user="t")
        assert rows == []