"""Client mirror from GTI Gerenciador (central/app/client_sync.py, web.py's
/agents/new). GTI Gerenciador is the single source of truth: Tenant rows
with source='GTI_GERENCIADOR' are upserted from it; source='LOCAL' rows
(pre-existing dev/test tenants) are never touched or offered."""
import dataclasses

import pytest
from sqlalchemy import select

from central.app import client_sync, config
from central.app.models import Tenant
from central.tests.test_control_plane import setup_db

CLIENTS = [
    {"external_client_id": 1, "code": "000001", "display_name": "Mercado Ativo", "active": True},
    {"external_client_id": 2, "code": "000002", "display_name": "Loja Inativa", "active": False},
]


@pytest.fixture
def factory():
    return setup_db()


def test_sync_creates_tenants_from_gerenciador(factory):
    with factory() as session:
        result = client_sync.sync_from_gerenciador(session, CLIENTS)
        session.commit()
        assert result.created == 2 and result.updated == 0 and result.fetched == 2
        assert result.active == 1 and result.inactive == 1
        rows = {row.external_client_id: row for row in session.scalars(select(Tenant)).all()}
        assert rows[1].name == "Mercado Ativo" and rows[1].source == "GTI_GERENCIADOR" and rows[1].active is True
        assert rows[2].active is False and rows[2].external_code == "000002"


def test_sync_is_idempotent_and_updates_changed_fields(factory):
    with factory() as session:
        client_sync.sync_from_gerenciador(session, CLIENTS)
        session.commit()
        result = client_sync.sync_from_gerenciador(session, CLIENTS)
        session.commit()
        assert result.created == 0 and result.unchanged == 2

        renamed = [{**CLIENTS[0], "display_name": "Mercado Ativo Renomeado"}, CLIENTS[1]]
        result2 = client_sync.sync_from_gerenciador(session, renamed)
        session.commit()
        assert result2.updated == 1 and result2.unchanged == 1
        row = session.scalar(select(Tenant).where(Tenant.external_client_id == 1))
        assert row.name == "Mercado Ativo Renomeado"


def test_sync_never_touches_local_tenants(factory):
    with factory() as session:
        session.add(Tenant(name="Acme", source="LOCAL"))
        session.commit()
        client_sync.sync_from_gerenciador(session, CLIENTS)
        session.commit()
        local = session.scalar(select(Tenant).where(Tenant.name == "Acme"))
        assert local.source == "LOCAL" and local.external_client_id is None


def test_sync_disambiguates_a_name_collision_with_an_existing_tenant(factory):
    with factory() as session:
        session.add(Tenant(name="Mercado Ativo", source="LOCAL"))
        session.commit()
        client_sync.sync_from_gerenciador(session, CLIENTS)
        session.commit()
        new_row = session.scalar(select(Tenant).where(Tenant.external_client_id == 1))
        assert new_row.name == "Mercado Ativo (000001)"  # the LOCAL tenant keeps the plain name


def test_deactivating_a_client_in_gerenciador_is_reflected_without_deleting_history(factory):
    with factory() as session:
        client_sync.sync_from_gerenciador(session, CLIENTS)
        session.commit()
        now_inactive = [{**CLIENTS[0], "active": False}, CLIENTS[1]]
        client_sync.sync_from_gerenciador(session, now_inactive)
        session.commit()
        row = session.scalar(select(Tenant).where(Tenant.external_client_id == 1))
        assert row.active is False  # row (and every FK pointing at it) is kept — never deleted


def test_disabled_without_configured_url_or_token(monkeypatch):
    monkeypatch.setattr(config, "settings", dataclasses.replace(config.settings, gerenciador_internal_url="", fiscal_internal_api_token=""))
    assert client_sync.enabled() is False
    with pytest.raises(client_sync.ClientSyncUnavailable):
        client_sync.fetch_from_gerenciador()