"""IngestionOrchestrator fetches the batch (no DB unit open), then writes it in
one Unit of Work and commits once (ADR-0012). Tested against fakes — no IO."""

from __future__ import annotations

from typing import Any, Optional

from datatypes.epc.domain.epc_property_data import EpcPropertyData
from domain.geospatial.coordinates import Coordinates
from domain.geospatial.planning_restrictions import PlanningRestrictions
from domain.geospatial.spatial_reference import SpatialReference
from domain.property.property import Property, PropertyIdentity
from orchestration.ingestion_orchestrator import IngestionOrchestrator
from repositories.geospatial.geospatial_repository import GeospatialRepository
from tests.orchestration.fakes import (
    FakeEpcRepo,
    FakePropertyRepo,
    FakeSolarRepo,
    FakeSpatialRepo,
    FakeUnitOfWork,
)


class _FakeEpcFetcher:
    def __init__(self, epc: Optional[EpcPropertyData]) -> None:
        self.epc = epc
        self.uprns: list[int] = []

    def get_by_uprn(self, uprn: int) -> Optional[EpcPropertyData]:
        self.uprns.append(uprn)
        return self.epc


class _FakeGeospatialRepo(GeospatialRepository):
    def __init__(
        self,
        coordinates: Optional[Coordinates],
        restrictions: PlanningRestrictions = PlanningRestrictions(),
    ) -> None:
        self._reference: Optional[SpatialReference] = (
            SpatialReference(coordinates=coordinates, restrictions=restrictions)
            if coordinates is not None
            else None
        )

    def coordinates_for(self, uprn: int) -> Optional[Coordinates]:
        return self._reference.coordinates if self._reference is not None else None

    def spatial_for(self, uprn: int) -> Optional[SpatialReference]:
        return self._reference


class _FakeSolarFetcher:
    def __init__(self, insights: dict[str, Any]) -> None:
        self.insights = insights
        self.calls: list[tuple[float, float]] = []

    def get_building_insights(
        self, longitude: float, latitude: float
    ) -> dict[str, Any]:
        self.calls.append((longitude, latitude))
        return self.insights


def _property(uprn: Optional[int]) -> Property:
    return Property(
        identity=PropertyIdentity(
            portfolio_id=1, postcode="A0 0AA", address="1 Some Street", uprn=uprn
        )
    )


def test_ingestion_persists_epc_and_threads_coords_into_solar() -> None:
    # Arrange
    epc = object.__new__(EpcPropertyData)
    insights = {"name": "buildings/X"}
    epc_repo = FakeEpcRepo()
    solar_repo = FakeSolarRepo()
    solar_fetcher = _FakeSolarFetcher(insights)
    uow = FakeUnitOfWork(
        property=FakePropertyRepo({10: _property(uprn=12345)}),
        epc=epc_repo,
        solar=solar_repo,
    )
    orchestrator = IngestionOrchestrator(
        unit_of_work=lambda: uow,
        epc_fetcher=_FakeEpcFetcher(epc),
        geospatial_repo=_FakeGeospatialRepo(
            Coordinates(longitude=-0.1278, latitude=51.5074)
        ),
        solar_fetcher=solar_fetcher,
    )

    # Act
    orchestrator.run([10])

    # Assert — EPC persisted, coords threaded from the repo into the solar
    # fetcher, solar persisted, batch committed once.
    assert epc_repo.saved == [(epc, 10)]
    assert solar_fetcher.calls == [(-0.1278, 51.5074)]
    assert solar_repo.saved == [(12345, -0.1278, 51.5074, insights)]
    assert uow.commits == 1


def test_ingestion_caches_the_spatial_reference_by_uprn() -> None:
    # Arrange — the geospatial repo resolves a listed-building UPRN.
    epc = object.__new__(EpcPropertyData)
    reference = SpatialReference(
        coordinates=Coordinates(longitude=-0.1278, latitude=51.5074),
        restrictions=PlanningRestrictions(is_listed=True),
    )
    spatial_repo = FakeSpatialRepo()
    uow = FakeUnitOfWork(
        property=FakePropertyRepo({10: _property(uprn=12345)}),
        epc=FakeEpcRepo(),
        spatial=spatial_repo,
    )
    orchestrator = IngestionOrchestrator(
        unit_of_work=lambda: uow,
        epc_fetcher=_FakeEpcFetcher(epc),
        geospatial_repo=_FakeGeospatialRepo(
            reference.coordinates, restrictions=reference.restrictions
        ),
        solar_fetcher=_FakeSolarFetcher({}),
    )

    # Act
    orchestrator.run([10])

    # Assert — the resolved reference is cached against the UPRN so Modelling
    # reads the protections back (ADR-0020), and the batch commits once.
    assert spatial_repo.saved == [(12345, reference)]
    assert uow.commits == 1


def test_ingestion_skips_property_without_uprn() -> None:
    # Arrange
    epc_repo = FakeEpcRepo()
    solar_repo = FakeSolarRepo()
    solar_fetcher = _FakeSolarFetcher({})
    uow = FakeUnitOfWork(
        property=FakePropertyRepo({10: _property(uprn=None)}),
        epc=epc_repo,
        solar=solar_repo,
    )
    orchestrator = IngestionOrchestrator(
        unit_of_work=lambda: uow,
        epc_fetcher=_FakeEpcFetcher(object.__new__(EpcPropertyData)),
        geospatial_repo=_FakeGeospatialRepo(None),
        solar_fetcher=solar_fetcher,
    )

    # Act
    orchestrator.run([10])

    # Assert — nothing fetched or persisted for a UPRN-less property.
    assert epc_repo.saved == []
    assert solar_repo.saved == []
    assert solar_fetcher.calls == []


def test_ingestion_persists_epc_but_skips_solar_when_no_coordinates() -> None:
    # Arrange
    epc = object.__new__(EpcPropertyData)
    epc_repo = FakeEpcRepo()
    solar_repo = FakeSolarRepo()
    solar_fetcher = _FakeSolarFetcher({})
    uow = FakeUnitOfWork(
        property=FakePropertyRepo({10: _property(uprn=12345)}),
        epc=epc_repo,
        solar=solar_repo,
    )
    orchestrator = IngestionOrchestrator(
        unit_of_work=lambda: uow,
        epc_fetcher=_FakeEpcFetcher(epc),
        geospatial_repo=_FakeGeospatialRepo(None),
        solar_fetcher=solar_fetcher,
    )

    # Act
    orchestrator.run([10])

    # Assert
    assert epc_repo.saved == [(epc, 10)]
    assert solar_repo.saved == []
    assert solar_fetcher.calls == []