"""全量穿透扫描引擎集成测试（需 PostgreSQL）。

验证场景检测→线索生成→落库的端到端链路（R5+R7+R8/R9）。
"""

from __future__ import annotations

from app.clues.models import ClueStatus, ConfidenceTier
from app.engines import scan
from app.scenarios.churn_fraud import CohortPoint
from app.scenarios.split_contract import ContractRecord


def test_split_scan_creates_high_confidence_clue(session):
    contracts = [ContractRecord(f"C{i}", f"CUST{i}", 850000) for i in range(8)]
    result = scan.run_split_contract_scan(
        session, contracts, approval_threshold=1_000_000, shared_controller=True
    )
    assert result.scenario_code == "R8"
    assert result.scanned_count == 8
    assert result.clue is not None
    assert result.clue.confidence == ConfidenceTier.HIGH
    assert result.clue.status == ClueStatus.NEW
    assert result.clue.amount_involved > 0
    assert result.clue.model_version == scan.MODEL_VERSION


def test_split_scan_no_clue_when_clean(session):
    contracts = [ContractRecord("C1", "A", 100000), ContractRecord("C2", "B", 3_000_000)]
    result = scan.run_split_contract_scan(session, contracts, approval_threshold=1_000_000)
    assert result.clue is None


def test_churn_scan_creates_clue(session):
    curve = [CohortPoint(0, 1.0), CohortPoint(1, 0.95), CohortPoint(2, 0.1)]
    result = scan.run_churn_scan(
        session,
        retention_curve=curve,
        commission_paid=300000,
        active_ratio=0.05,
        zero_usage_ratio=0.9,
        channel_key="CH-001",
    )
    assert result.clue is not None
    assert result.clue.scenario_code == "R9"
    assert result.clue.subjects["channel"] == "CH-001"