# backend/app/connectors/finance/mock.py — 시드 기반 finance sync (phase-13)
from datetime import UTC, datetime

from sqlmodel import Session

from ..base import BaseConnector, NormalizedRecord, RawRecord
from .normalize import normalize_tx, upsert_tx

_SIM = [
    {
        "id": "sim-ftx1",
        "date": "2026-06-08",
        "merchant": "스타벅스 강남R점",
        "amount": 6300,
        "category": "카페·간식",
    }
]


class MockFinanceConnector(BaseConnector):
    domain = "finance"
    entity_type = "finance_tx"

    def fetch(self, session: Session, *, full: bool = False):
        for p in getattr(self, "_sim_payloads", []):
            yield RawRecord(
                external_id=p["id"],
                payload=p,
                etag=str(p.get("amount", "")),
                external_updated_at=datetime.now(UTC),
            )

    def simulate_new(self) -> "MockFinanceConnector":
        self._sim_payloads = _SIM
        return self

    def normalize(self, raw: RawRecord) -> NormalizedRecord:
        return normalize_tx(self.account, raw)

    def write(self, session: Session, norm: NormalizedRecord):
        return upsert_tx(session, norm)

    def event_for(self, norm, entity_id):
        return "finance.transaction"