"""Simulator + COL integration — verifies `_resolve_col_adjustment` is
applied to the request before paths are built and surfaced in the result.

These tests bypass HTTP and call the resolver directly to keep them fast.
"""
from __future__ import annotations

from decimal import Decimal

from fire_planner.api.schemas import SimulateRequest
from fire_planner.api.simulate import _resolve_col_adjustment


def _req(**overrides: object) -> SimulateRequest:
    base = dict(
        jurisdiction="uk",
        strategy="trinity",
        leave_uk_year=0,
        spending_gbp=Decimal("85000"),
        nw_seed_gbp=Decimal("1050000"),
        horizon_years=73,
    )
    base.update(overrides)
    return SimulateRequest(**base)  # type: ignore[arg-type]


def test_col_default_on_for_known_jurisdiction() -> None:
    """Default config + cyprus jurisdiction → multiplier ~0.67."""
    req = _req(jurisdiction="cyprus", leave_uk_year=2)
    adj, mult, adj_spend, city = _resolve_col_adjustment(req)
    assert mult is not None and Decimal("0.55") < mult < Decimal("0.75")
    assert city == "limassol"
    assert adj_spend is not None and adj_spend < Decimal("85000")
    assert adj.spending_gbp == adj_spend  # the simulator runs on the adjusted figure


def test_col_off_returns_unchanged_request() -> None:
    req = _req(jurisdiction="cyprus", leave_uk_year=2, col_auto_adjust=False)
    adj, mult, adj_spend, city = _resolve_col_adjustment(req)
    assert mult is None
    assert adj_spend is None
    assert city is None
    assert adj.spending_gbp == Decimal("85000")
    # The returned request is the same instance — no copy when no-op.
    assert adj is req


def test_col_nomad_jurisdiction_skipped() -> None:
    """Nomad has no representative city — auto-adjust should silently skip."""
    req = _req(jurisdiction="nomad", leave_uk_year=2)
    adj, mult, adj_spend, city = _resolve_col_adjustment(req)
    assert mult is None
    assert adj_spend is None
    assert city is None  # no representative city for nomad


def test_col_uk_to_uk_identity_returns_no_multiplier() -> None:
    """UK staying in UK is identity — surface the city but no scaling."""
    req = _req(jurisdiction="uk", leave_uk_year=0)
    adj, mult, adj_spend, city = _resolve_col_adjustment(req)
    assert mult is None
    assert adj_spend is None
    assert city == "london"
    assert adj.spending_gbp == Decimal("85000")


def test_col_explicit_target_city_overrides_jurisdiction_default() -> None:
    """User picks Sofia explicitly even though jurisdiction is cyprus."""
    req = _req(jurisdiction="cyprus", leave_uk_year=2, col_target_city="sofia")
    adj, mult, adj_spend, city = _resolve_col_adjustment(req)
    assert city == "sofia"
    # sofia ratio ~0.41 — should be smaller than the limassol default
    assert mult is not None and mult < Decimal("0.50")


def test_col_unknown_city_degrades_gracefully() -> None:
    """Unknown city → skip, do not raise — Phase-2 scraper will close gap."""
    req = _req(jurisdiction="cyprus", leave_uk_year=2, col_target_city="atlantis")
    adj, mult, adj_spend, city = _resolve_col_adjustment(req)
    assert mult is None
    assert adj_spend is None
    assert city == "atlantis"  # the requested name is still echoed
    assert adj.spending_gbp == Decimal("85000")


def test_col_bangkok_dramatic_discount() -> None:
    req = _req(jurisdiction="thailand", leave_uk_year=2)
    adj, mult, adj_spend, city = _resolve_col_adjustment(req)
    assert city == "bangkok"
    assert mult is not None and mult < Decimal("0.35")
    assert adj_spend is not None and adj_spend < Decimal("30000")  # £85k → ~£24k