from __future__ import annotations

from types import SimpleNamespace
import unittest

from sqlalchemy import create_engine
from sqlalchemy.orm import Session

from govoplan_access.backend.db.models import Account, Group, User
from govoplan_core.auth import ApiPrincipal
from govoplan_core.core.access import PrincipalRef
from govoplan_core.core.change_sequence import ChangeSequenceEntry
from govoplan_core.core.events import EventObjectRef, EventTenantRef, PlatformEvent
from govoplan_core.core.search import (
    SearchAuthorizationRequest,
    SearchBackfillRequest,
    SearchResourceReference,
)
from govoplan_core.db.base import Base
from govoplan_files.backend.db.models import FileAsset, FileFolder, FileShare
from govoplan_files.backend.search_source import (
    FilesSearchSource,
    PROVIDER_ID,
)


class FilesSearchSourceTests(unittest.TestCase):
    def setUp(self) -> None:
        self.engine = create_engine("sqlite://")
        Base.metadata.create_all(
            self.engine,
            tables=(
                Account.__table__,
                User.__table__,
                Group.__table__,
                FileAsset.__table__,
                FileFolder.__table__,
                FileShare.__table__,
                ChangeSequenceEntry.__table__,
            ),
        )
        self.session = Session(self.engine)
        self.session.add_all(
            (
                Account(
                    id="account-1",
                    email="one@example.test",
                    normalized_email="one@example.test",
                ),
                User(
                    id="user-1",
                    tenant_id="tenant-1",
                    account_id="account-1",
                    email="one@example.test",
                ),
                FileAsset(
                    id="file-1",
                    tenant_id="tenant-1",
                    owner_type="user",
                    owner_user_id="user-1",
                    display_path="records/permit.pdf",
                    filename="permit.pdf",
                    description="Monthly permit evidence",
                ),
                FileAsset(
                    id="file-other",
                    tenant_id="tenant-2",
                    owner_type="user",
                    display_path="other.pdf",
                    filename="other.pdf",
                ),
            )
        )
        self.session.commit()
        self.source = FilesSearchSource()

    def tearDown(self) -> None:
        self.session.close()
        self.engine.dispose()

    def test_backfill_and_authorization_are_tenant_bounded(self) -> None:
        page = self.source.backfill(
            self.session,
            request=SearchBackfillRequest(
                tenant_id="tenant-1",
                provider_id=PROVIDER_ID,
                resource_type="file",
                rebuild_id="rebuild-1",
            ),
        )
        self.assertEqual(("file-1",), tuple(doc.resource_id for doc in page.documents))
        reference = SearchResourceReference(
            tenant_id="tenant-1",
            module_id="files",
            resource_type="file",
            resource_id="file-1",
        )
        request = SearchAuthorizationRequest(reference=reference, source_revision="1")
        self.assertTrue(
            self.source.authorize(
                self.session,
                _principal({"files:file:read"}),
                requests=(request,),
            )[reference.key]
        )
        self.assertFalse(
            self.source.authorize(
                self.session,
                _principal(set()),
                requests=(request,),
            )[reference.key]
        )

    def test_committed_file_event_produces_authoritative_upsert(self) -> None:
        event = PlatformEvent(
            type="files.file.updated",
            module_id="files",
            tenant=EventTenantRef(id="tenant-1"),
            resource=EventObjectRef(type="file", id="file-1"),
        )
        changes = self.source.index_changes_for_event(
            self.session,
            event=event,
            delivery_key="delivery-1",
        )
        self.assertEqual(1, len(changes))
        self.assertEqual("upsert", changes[0].kind)
        self.assertEqual(event.event_id, changes[0].cursor)


def _principal(scopes: set[str]) -> ApiPrincipal:
    return ApiPrincipal(
        principal=PrincipalRef(
            account_id="account-1",
            membership_id="user-1",
            tenant_id="tenant-1",
            scopes=frozenset(scopes),
        ),
        account=SimpleNamespace(id="account-1"),
        user=SimpleNamespace(id="user-1"),
    )


if __name__ == "__main__":
    unittest.main()