from datetime import timedelta
import unittest

from user_engine.adapters.local import InMemoryUserEngineStore, LocalAuthorizationCheckPort
from user_engine.domain import (
    AccountStatus,
    CanonEntityReference,
    Catalog,
    CatalogLifecycle,
    FactorVerification,
    IdentityFactorType,
    PreparedAccount,
    PreparedAccountStatus,
    PreparedEntitlement,
    PreparedEntitlementKind,
    PreparedFactorRequirement,
    ProfileScope,
    utc_now,
)
from user_engine.errors import AuthorizationDenied, ConflictError, ValidationError
from user_engine.service import UserEngineService
from user_engine.testing.fixtures import (
    FixtureIdentityClaimsAdapter,
    human_actor_claims,
    sample_application,
    sample_application_binding,
    sample_catalog,
)


class PreparedAccountTests(unittest.TestCase):
    def test_claim_prepared_account_activates_entitlements(self):
        service, store = _service()
        preparer = _actor(subject="tenant-admin", roles=("tenant-admin",))
        applicant = _actor(subject="new-user", email="sample.user@example.test")
        _bootstrap_catalog(service, preparer)
        prepared = _prepare_demo_account(service, preparer)
        registration = _complete_registration(service, applicant)

        claim = service.claim_prepared_account(
            applicant,
            registration.session.registration_id,
            correlation_id="corr-claim",
        )

        self.assertEqual(claim.prepared_account.status, PreparedAccountStatus.CLAIMED)
        self.assertEqual(claim.prepared_account.claimed_by_user_id, claim.user.user_id)
        self.assertEqual(claim.tenant_accounts[0].status, AccountStatus.ACTIVE)
        self.assertEqual(claim.memberships[0].scope_id, "team:demo")
        self.assertEqual(claim.memberships[0].kind, "member")
        self.assertEqual(claim.profile_values[0].attribute_key, "demo.display_density")
        self.assertEqual(claim.profile_values[0].value, "compact")
        self.assertEqual(claim.onboarding_journeys, ("welcome-demo",))
        self.assertEqual(
            store.prepared_account(prepared.prepared_account_id).status,
            PreparedAccountStatus.CLAIMED,
        )
        self.assertIn(
            "prepared_account.onboarding_requested",
            [event.event_type for event in service.outbox_events()],
        )
        self.assertNotIn(
            "sample.user@example.test",
            repr([event.payload for event in service.outbox_events()]),
        )

    def test_claim_requires_matching_verified_factor(self):
        service, store = _service()
        preparer = _actor(subject="tenant-admin", roles=("tenant-admin",))
        applicant = _actor(subject="new-user", email="sample.user@example.test")
        _bootstrap_catalog(service, preparer)
        prepared = _prepare_demo_account(
            service,
            preparer,
            email="different@example.test",
        )
        registration = _complete_registration(service, applicant)
        before_outbox = len(service.outbox_events())

        with self.assertRaises(ValidationError):
            service.claim_prepared_account(
                applicant,
                registration.session.registration_id,
                prepared_account_id=prepared.prepared_account_id,
                correlation_id="corr-claim-mismatch",
            )

        self.assertEqual(
            store.prepared_account(prepared.prepared_account_id).status,
            PreparedAccountStatus.PENDING,
        )
        self.assertEqual(store.memberships_for_user(registration.user.user_id), ())
        self.assertEqual(len(service.outbox_events()), before_outbox)
        self.assertEqual(
            service.audit_records()[-1].summary,
            "prepared account claim denied: factor mismatch or closed",
        )

    def test_claim_ignores_expired_factor_evidence(self):
        service, store = _service()
        preparer = _actor(subject="tenant-admin", roles=("tenant-admin",))
        applicant = _actor(subject="new-user", email="sample.user@example.test")
        _bootstrap_catalog(service, preparer)
        prepared = _prepare_demo_account(service, preparer)
        registration = _complete_registration(
            service,
            applicant,
            factor_expires_at=utc_now() - timedelta(days=1),
        )

        with self.assertRaises(ValidationError):
            service.claim_prepared_account(
                applicant,
                registration.session.registration_id,
                prepared_account_id=prepared.prepared_account_id,
                correlation_id="corr-claim-expired-factor",
            )

        self.assertEqual(store.memberships_for_user(registration.user.user_id), ())
        self.assertEqual(
            service.audit_records()[-1].summary,
            "prepared account claim denied: factor mismatch or closed",
        )

    def test_ambiguous_prepared_account_matches_fail_closed(self):
        service, store = _service()
        preparer = _actor(subject="tenant-admin", roles=("tenant-admin",))
        applicant = _actor(subject="new-user", email="sample.user@example.test")
        _bootstrap_catalog(service, preparer)
        requirement = _email_requirement()
        entitlements = (_membership_entitlement(),)
        store.save_prepared_account(
            PreparedAccount(
                tenant="tenant:coulomb",
                required_factor_matches=(requirement,),
                entitlements=entitlements,
                prepared_by_subject="fixture",
            )
        )
        store.save_prepared_account(
            PreparedAccount(
                tenant="tenant:coulomb",
                required_factor_matches=(requirement,),
                entitlements=entitlements,
                prepared_by_subject="fixture",
            )
        )
        registration = _complete_registration(service, applicant)

        with self.assertRaises(ConflictError):
            service.claim_prepared_account(
                applicant,
                registration.session.registration_id,
                correlation_id="corr-ambiguous",
            )

        self.assertEqual(
            service.audit_records()[-1].summary,
            "prepared account claim denied: ambiguous match",
        )
        self.assertEqual(store.memberships_for_user(registration.user.user_id), ())

    def test_approval_required_entitlement_blocks_claim(self):
        service, store = _service()
        preparer = _actor(subject="tenant-admin", roles=("tenant-admin",))
        applicant = _actor(subject="new-user", email="sample.user@example.test")
        prepared = service.prepare_account(
            preparer,
            tenant="tenant:coulomb",
            required_factor_matches=(_email_requirement(),),
            entitlements=(
                PreparedEntitlement(
                    kind=PreparedEntitlementKind.MEMBERSHIP,
                    tenant="tenant:coulomb",
                    scope_type="team",
                    scope_id="team:ops",
                    role="admin",
                    requires_approval=True,
                ),
            ),
            correlation_id="corr-prepare-privileged",
        )
        registration = _complete_registration(service, applicant)

        with self.assertRaises(AuthorizationDenied):
            service.claim_prepared_account(
                applicant,
                registration.session.registration_id,
                prepared_account_id=prepared.prepared_account_id,
                correlation_id="corr-claim-privileged",
            )

        self.assertEqual(
            store.prepared_account(prepared.prepared_account_id).status,
            PreparedAccountStatus.PENDING,
        )
        self.assertEqual(store.memberships_for_user(registration.user.user_id), ())
        self.assertEqual(
            service.audit_records()[-1].summary,
            "prepared account claim denied: approval required",
        )

    def test_revoked_and_expired_prepared_accounts_cannot_be_claimed(self):
        service, store = _service()
        preparer = _actor(subject="tenant-admin", roles=("tenant-admin",))
        applicant = _actor(subject="new-user", email="sample.user@example.test")
        _bootstrap_catalog(service, preparer)
        revoked = _prepare_demo_account(service, preparer)
        service.revoke_prepared_account(
            preparer,
            revoked.prepared_account_id,
            correlation_id="corr-revoke",
        )
        expired = _prepare_demo_account(service, preparer)
        service.expire_prepared_account(
            preparer,
            expired.prepared_account_id,
            correlation_id="corr-expire",
        )
        registration = _complete_registration(service, applicant)

        for prepared in (revoked, expired):
            with self.assertRaises(ValidationError):
                service.claim_prepared_account(
                    applicant,
                    registration.session.registration_id,
                    prepared_account_id=prepared.prepared_account_id,
                    correlation_id=f"corr-claim-{prepared.prepared_account_id}",
                )

        self.assertEqual(store.memberships_for_user(registration.user.user_id), ())
        self.assertEqual(
            service.audit_records()[-1].summary,
            "prepared account claim denied: factor mismatch or closed",
        )

    def test_duplicate_pending_prepared_accounts_are_rejected(self):
        service, _ = _service()
        preparer = _actor(subject="tenant-admin", roles=("tenant-admin",))
        _bootstrap_catalog(service, preparer)
        _prepare_demo_account(service, preparer)

        with self.assertRaises(ConflictError):
            _prepare_demo_account(service, preparer)

    def test_weak_factor_requirements_are_rejected(self):
        service, _ = _service()
        preparer = _actor(subject="tenant-admin", roles=("tenant-admin",))

        with self.assertRaises(ValidationError):
            service.prepare_account(
                preparer,
                tenant="tenant:coulomb",
                required_factor_matches=(
                    PreparedFactorRequirement(
                        factor_type=IdentityFactorType.EMAIL,
                        normalized_value=" ",
                    ),
                ),
                entitlements=(_membership_entitlement(),),
                correlation_id="corr-weak-factor",
            )

    def test_revoke_and_list_prepared_accounts(self):
        service, _ = _service()
        preparer = _actor(subject="tenant-admin", roles=("tenant-admin",))
        prepared = _prepare_demo_account(service, preparer)

        listed = service.list_prepared_accounts(
            preparer,
            tenant="tenant:coulomb",
            correlation_id="corr-list",
        )
        revoked = service.revoke_prepared_account(
            preparer,
            prepared.prepared_account_id,
            correlation_id="corr-revoke",
        )

        self.assertEqual(listed[0].prepared_account_id, prepared.prepared_account_id)
        self.assertEqual(revoked.status, PreparedAccountStatus.REVOKED)


def _service():
    store = InMemoryUserEngineStore()
    service = UserEngineService(
        store=store,
        identity_adapter=FixtureIdentityClaimsAdapter(),
        authorization=LocalAuthorizationCheckPort(),
    )
    return service, store


def _actor(
    *,
    subject: str = "sample-user",
    roles: tuple[str, ...] = ("user",),
    email: str = "sample.user@example.test",
):
    claims = human_actor_claims(subject=subject, tenant="tenant:coulomb")
    claims["roles"] = list(roles)
    claims["email"] = email
    claims["preferred_username"] = subject
    return FixtureIdentityClaimsAdapter().normalize(claims)


def _bootstrap_catalog(service: UserEngineService, actor):
    service.register_application(
        actor,
        sample_application(),
        binding=sample_application_binding(),
        correlation_id="corr-app",
    )
    service.publish_catalog(
        actor,
        Catalog(
            catalog_id="demo-prepared-profile",
            namespace=sample_catalog().namespace,
            version=sample_catalog().version,
            owning_application_id=sample_catalog().owning_application_id,
            lifecycle=CatalogLifecycle.ACTIVE,
            attributes=sample_catalog().attributes,
        ),
        correlation_id="corr-catalog",
    )


def _complete_registration(
    service: UserEngineService,
    actor,
    *,
    factor_expires_at=None,
):
    session = service.start_registration(actor, correlation_id="corr-start")
    service.attach_registration_factor(
        actor,
        session.registration_id,
        FactorVerification(
            factor_type=IdentityFactorType.EMAIL,
            normalized_value="sample.user@example.test",
            display_value="sample.user@example.test",
            source_system="fixture-email",
            evidence_refs=(
                CanonEntityReference(
                    concept="Evidence Source",
                    identifier="email-proof",
                    source_system="fixture-email",
                ),
            ),
            expires_at=factor_expires_at,
        ),
        correlation_id="corr-factor",
    )
    return service.complete_registration(
        actor,
        session.registration_id,
        correlation_id="corr-complete",
    )


def _prepare_demo_account(
    service: UserEngineService,
    preparer,
    *,
    email: str = "sample.user@example.test",
):
    return service.prepare_account(
        preparer,
        tenant="tenant:coulomb",
        required_factor_matches=(_email_requirement(email=email),),
        entitlements=(
            PreparedEntitlement(
                kind=PreparedEntitlementKind.TENANT_ACCOUNT,
                tenant="tenant:coulomb",
                tenant_account_status=AccountStatus.ACTIVE,
            ),
            _membership_entitlement(),
            PreparedEntitlement(
                kind=PreparedEntitlementKind.PROFILE_VALUE,
                tenant="tenant:coulomb",
                attribute_key="demo.display_density",
                value="compact",
                profile_scope=ProfileScope.APPLICATION,
                profile_scope_id="app.demo",
            ),
            PreparedEntitlement(
                kind=PreparedEntitlementKind.ONBOARDING_JOURNEY,
                tenant="tenant:coulomb",
                onboarding_journey="welcome-demo",
            ),
        ),
        display_name="Prepared User",
        primary_email=email,
        correlation_id="corr-prepare",
    )


def _email_requirement(
    *,
    email: str = "sample.user@example.test",
) -> PreparedFactorRequirement:
    return PreparedFactorRequirement(
        factor_type=IdentityFactorType.EMAIL,
        normalized_value=email,
        source_system="fixture-email",
    )


def _membership_entitlement() -> PreparedEntitlement:
    return PreparedEntitlement(
        kind=PreparedEntitlementKind.MEMBERSHIP,
        tenant="tenant:coulomb",
        scope_type="team",
        scope_id="team:demo",
        role="member",
    )


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