from __future__ import annotations

from datetime import datetime, timedelta, timezone

from sqlalchemy import create_engine
from sqlalchemy.orm import Session

from app.database import Base
from app.models import ImportStatus, CommunityImportRun, OfficialRecordImport
from app.readiness import readiness_report


class AvailableStorage:
    def list_buckets(self) -> dict[str, list[object]]:
        return {"Buckets": []}


class UnavailableStorage:
    def list_buckets(self) -> None:
        raise ConnectionError("fixture unavailable")


def test_optional_import_does_not_block_dependencies() -> None:
    engine = create_engine("sqlite://")
    Base.metadata.create_all(engine)
    with Session(engine) as session:
        ready, components = readiness_report(
            session, AvailableStorage(), import_required=False, import_interval_seconds=3600,
        )
    assert ready is True
    assert components["postgresql"]["status"] == "ready"
    assert components["minio"]["status"] == "ready"
    assert components["official_import"]["status"] == "optional"
    assert components["official_import"]["last_run_status"] is None
    assert "community_scheduler" in components


def test_required_import_must_be_recent_and_successful() -> None:
    engine = create_engine("sqlite://")
    Base.metadata.create_all(engine)
    now = datetime.now(timezone.utc)
    with Session(engine) as session:
        session.add(OfficialRecordImport(
            started_at=now - timedelta(minutes=30), finished_at=now - timedelta(minutes=29),
            status=ImportStatus.success, source_url="fixture://records", rows_seen=1,
            rows_created=1, rows_updated=0,
        ))
        session.commit()
        ready, components = readiness_report(
            session, AvailableStorage(), import_required=True,
            import_interval_seconds=3600, now=now,
        )
    assert ready is True
    assert components["official_import"]["status"] == "ready"


def test_unavailable_storage_and_stale_import_fail_readiness() -> None:
    engine = create_engine("sqlite://")
    Base.metadata.create_all(engine)
    now = datetime.now(timezone.utc)
    with Session(engine) as session:
        session.add(OfficialRecordImport(
            started_at=now - timedelta(hours=3), finished_at=now - timedelta(hours=3),
            status=ImportStatus.success, source_url="fixture://records", rows_seen=1,
            rows_created=1, rows_updated=0,
        ))
        session.commit()
        ready, components = readiness_report(
            session, UnavailableStorage(), import_required=True,
            import_interval_seconds=3600, now=now,
        )
    assert ready is False
    assert components["minio"]["status"] == "unavailable"
    assert components["official_import"]["status"] == "stale"


def test_community_scheduler_success_does_not_block_readiness() -> None:
    engine = create_engine("sqlite://")
    Base.metadata.create_all(engine)
    now = datetime.now(timezone.utc)
    with Session(engine) as session:
        session.add(CommunityImportRun(
            source_system="rf4db",
            started_at=now - timedelta(minutes=30),
            status="success",
            source_url="fixture://rf4db",
            rows_seen=5, rows_created=5, rows_updated=0, error_summary=None,
        ))
        session.commit()
        ready, components = readiness_report(
            session, AvailableStorage(), import_required=False,
            import_interval_seconds=3600, community_import_interval_seconds=1800, now=now,
        )
    assert ready is True
    assert components["community_scheduler"]["status"] == "ready"


def test_community_scheduler_stale_or_failed_blocks_readiness() -> None:
    engine = create_engine("sqlite://")
    Base.metadata.create_all(engine)
    now = datetime.now(timezone.utc)
    with Session(engine) as session:
        # Stale run
        session.add(CommunityImportRun(
            source_system="rf4db",
            started_at=now - timedelta(hours=2),
            status="success",
            source_url="fixture://rf4db",
            rows_seen=5, rows_created=5, rows_updated=0, error_summary=None,
        ))
        session.commit()
        ready, components = readiness_report(
            session, AvailableStorage(), import_required=False,
            import_interval_seconds=3600, community_import_interval_seconds=1800, now=now,
        )
    assert ready is False
    assert components["community_scheduler"]["status"] == "stale"


def test_community_scheduler_failed_status_blocks_readiness() -> None:
    engine = create_engine("sqlite://")
    Base.metadata.create_all(engine)
    now = datetime.now(timezone.utc)
    with Session(engine) as session:
        session.add(CommunityImportRun(
            source_system="rf4db",
            started_at=now - timedelta(minutes=30),
            status="failed",
            source_url="fixture://rf4db",
            rows_seen=0, rows_created=0, rows_updated=0,
            error_summary="ConnectionError",
        ))
        session.commit()
        ready, components = readiness_report(
            session, AvailableStorage(), import_required=False,
            import_interval_seconds=3600, community_import_interval_seconds=1800, now=now,
        )
    assert ready is False
    assert components["community_scheduler"]["status"] == "failed"