"""通用场景调度器 run_scenarios 的落库集成测试（需 PostgreSQL）。

验证「场景插件 → 统一调度 → 阈值过滤 → 落库」链路，且与旧 run_xxx_scan 行为一致。
"""

from __future__ import annotations

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


def test_run_scenarios_creates_clues(session):
    contracts = [ContractRecord(f"C{i}", f"CUST{i}", 850000) for i in range(8)]
    curve = [CohortPoint(0, 1.0), CohortPoint(1, 0.95), CohortPoint(2, 0.1)]
    scenarios = [
        SplitContractScenario(
            contracts, approval_threshold=1_000_000, shared_controller=True
        ),
        ChurnFraudScenario(
            retention_curve=curve,
            commission_paid=300000,
            active_ratio=0.05,
            zero_usage_ratio=0.9,
            channel_key="CH-001",
        ),
    ]
    results = scan.run_scenarios(session, scenarios)
    by_code = {r.scenario_code: r for r in results}

    assert by_code["R8"].scanned_count == 8
    assert len(by_code["R8"].clues) == 1
    r8_clue = by_code["R8"].clues[0]
    assert r8_clue.confidence == ConfidenceTier.HIGH
    assert r8_clue.status == ClueStatus.NEW
    assert r8_clue.amount_involved > 0
    assert r8_clue.model_version == scan.MODEL_VERSION

    assert by_code["R9"].scanned_count == 3
    assert len(by_code["R9"].clues) == 1
    assert by_code["R9"].clues[0].scenario_code == "R9"
    assert by_code["R9"].clues[0].subjects["channel"] == "CH-001"


def test_run_scenarios_filters_below_threshold(session):
    # 干净数据：拆单不命中、养卡曲线平滑且佣金匹配 → 均不应生成线索
    contracts = [ContractRecord("C1", "A", 100000), ContractRecord("C2", "B", 3_000_000)]
    curve = [CohortPoint(0, 1.0), CohortPoint(1, 0.98), CohortPoint(2, 0.97)]
    scenarios = [
        SplitContractScenario(contracts, approval_threshold=1_000_000),
        ChurnFraudScenario(
            retention_curve=curve,
            commission_paid=10000,
            active_ratio=0.9,
            zero_usage_ratio=0.05,
            channel_key="CH-X",
        ),
    ]
    results = scan.run_scenarios(session, scenarios)
    for r in results:
        assert r.clues == []