from __future__ import annotations

import pytest

from app.domain.portfolio_math import resolve_portfolio_spot_from_quote
from app.models.portfolio import PortfolioConfig
from app.services.alerts import build_portfolio_alert_context


def test_overview_converts_gld_share_quote_to_ounce_equivalent_spot() -> None:
    """Overview page converts GLD share quotes using expense-adjusted backing."""
    from datetime import date

    from app.domain.instruments import gld_ounces_per_share

    config = PortfolioConfig(entry_price=4400.0, gold_ounces=220.0, entry_basis_mode="weight", loan_amount=145000.0)

    spot_price, source, updated_at = resolve_portfolio_spot_from_quote(
        config,
        {
            "symbol": "GLD",
            "price": 404.19,
            "quote_unit": "share",
            "source": "yfinance",
            "updated_at": "2026-03-24T00:00:00+00:00",
        },
    )
    portfolio = build_portfolio_alert_context(
        config,
        spot_price=spot_price,
        source=source,
        updated_at=updated_at,
    )

    # With expense-adjusted backing (~0.0916 oz/share), spot = 404.19 / 0.091576... ≈ 4413.71
    current_backing = float(gld_ounces_per_share(date.today()))
    expected_spot = 404.19 / current_backing
    assert abs(spot_price - expected_spot) < 0.01
    assert source == "yfinance"
    assert updated_at == "2026-03-24T00:00:00+00:00"
    # Gold value = 220 oz * spot_price
    expected_gold_value = 220.0 * spot_price
    assert abs(portfolio["gold_value"] - expected_gold_value) < 0.01
    assert portfolio["net_equity"] == pytest.approx(expected_gold_value - 145000.0, abs=0.01)
    assert round(float(portfolio["margin_call_price"]), 2) == 878.79


def test_overview_fails_closed_to_configured_entry_price_for_unsupported_quote_symbol() -> None:
    config = PortfolioConfig(entry_price=4400.0, gold_ounces=220.0, entry_basis_mode="weight", loan_amount=145000.0)

    spot_price, source, updated_at = resolve_portfolio_spot_from_quote(
        config,
        {
            "symbol": "SLV",
            "price": 28.50,
            "quote_unit": "share",
            "source": "yfinance",
            "updated_at": "2026-03-24T00:00:00+00:00",
        },
    )

    assert spot_price == 4400.0
    assert source == "configured_entry_price"
    assert updated_at == ""


def test_overview_uses_fallback_symbol_when_quote_payload_omits_symbol() -> None:
    """GLD quote with fallback symbol uses expense-adjusted backing for conversion."""
    from datetime import date

    from app.domain.instruments import gld_ounces_per_share

    config = PortfolioConfig(entry_price=4400.0, gold_ounces=220.0, entry_basis_mode="weight", loan_amount=145000.0)

    spot_price, source, updated_at = resolve_portfolio_spot_from_quote(
        config,
        {"price": 404.19, "quote_unit": "share", "source": "yfinance", "updated_at": "2026-03-24T00:00:00+00:00"},
        fallback_symbol="GLD",
    )

    # With expense-adjusted backing (~0.0916 oz/share), spot = 404.19 / 0.091576... ≈ 4413.71
    current_backing = float(gld_ounces_per_share(date.today()))
    expected_spot = 404.19 / current_backing
    assert abs(spot_price - expected_spot) < 0.01
    assert source == "yfinance"
    assert updated_at == "2026-03-24T00:00:00+00:00"


def test_overview_falls_back_when_quote_price_is_missing_or_invalid() -> None:
    config = PortfolioConfig(entry_price=4400.0, gold_ounces=220.0, entry_basis_mode="weight", loan_amount=145000.0)

    missing_price = resolve_portfolio_spot_from_quote(
        config,
        {"symbol": "GLD", "quote_unit": "share", "source": "yfinance", "updated_at": "2026-03-24T00:00:00+00:00"},
        fallback_symbol="GLD",
    )
    zero_price = resolve_portfolio_spot_from_quote(
        config,
        {
            "symbol": "GLD",
            "price": 0.0,
            "quote_unit": "share",
            "source": "yfinance",
            "updated_at": "2026-03-24T00:00:00+00:00",
        },
        fallback_symbol="GLD",
    )
    bad_string_price = resolve_portfolio_spot_from_quote(
        config,
        {
            "symbol": "GLD",
            "price": "not-a-number",
            "quote_unit": "share",
            "source": "yfinance",
            "updated_at": "2026-03-24T00:00:00+00:00",
        },
        fallback_symbol="GLD",
    )

    assert missing_price == (4400.0, "configured_entry_price", "")
    assert zero_price == (4400.0, "configured_entry_price", "")
    assert bad_string_price == (4400.0, "configured_entry_price", "")


def test_overview_falls_back_when_quote_unit_metadata_is_missing() -> None:
    config = PortfolioConfig(entry_price=4400.0, gold_ounces=220.0, entry_basis_mode="weight", loan_amount=145000.0)

    result = resolve_portfolio_spot_from_quote(
        config,
        {"symbol": "GLD", "price": 404.19, "source": "yfinance", "updated_at": "2026-03-24T00:00:00+00:00"},
        fallback_symbol="GLD",
    )

    assert result == (4400.0, "configured_entry_price", "")