"""语义分析器骨架测试（T-G0）：enabled 门控 / DDL / 独立挂载 / 配置构建。"""
import pytest

pytest.importorskip("fastapi")

from fastapi import FastAPI
from fastapi.testclient import TestClient

import gateway.api as ga
from gateway.sense.config import build_sense_config
from gateway.sense.store import SenseStore


def test_sense_disabled_by_default_404():
    """D-G7：默认 enabled=False -> 全局 app 不注册任何 /sense 路由。"""
    client = TestClient(ga.app)
    assert client.get("/sense/health").status_code == 404
    assert client.get("/sense/admin/agreement").status_code == 404


def test_ddl_creates_tables_and_indexes(tmp_path):
    """两表 + 两索引幂等创建。"""
    store = SenseStore.init_db(tmp_path / "sense.sqlite3")
    tables = set(store.table_names())
    assert {"tier_observations", "sense_artifacts"} <= tables
    idx = set(store.index_names())
    assert {"idx_obs_ts", "idx_obs_policy"} <= idx
    SenseStore.init_db(tmp_path / "sense.sqlite3")     # 幂等


def test_build_sense_config_defaults():
    """缺省值 + mode 非法回落 collect（D-G7）。"""
    cfg = build_sense_config({})
    assert cfg.enabled is False
    assert cfg.mode == "collect"
    assert cfg.embedder.dim == 1024
    assert cfg.min_labels == 500
    assert cfg.tier_pool_hint("proxy", "t1") == "local-small"
    assert cfg.tier_pool_hint("proxy", "t3") == "premium"
    assert cfg.tier_pool_hint("client", "t2") == "budget"   # 无配置兜底
    bad = build_sense_config({"sense": {"mode": "turbo", "enabled": True}})
    assert bad.mode == "collect"


def test_enabled_router_health(tmp_path):
    """enabled=True 独立挂载：/sense/health 透出灰度状态。"""
    cfg = build_sense_config({"sense": {"enabled": True, "mode": "collect",
                                        "db_path": str(tmp_path / "s.sqlite3")}})
    app = FastAPI()
    app.include_router(
        __import__("gateway.sense", fromlist=["x"]).build_sense_router(cfg))
    client = TestClient(app)
    r = client.get("/sense/health")
    assert r.status_code == 200
    data = r.json()
    assert data["enabled"] is True and data["mode"] == "collect"


def test_observation_roundtrip(tmp_path):
    """观察写入/标签回填/计数/留存清理（store 基础链路）。"""
    store = SenseStore.init_db(tmp_path / "s.sqlite3")
    store.insert_observation({
        "request_id": "r1", "consumer": "pipeline", "decided_tier": "T2",
        "executed_tier": "T2", "probs": '{"t1":0.2,"t2":0.6,"t3":0.2}',
        "policy_version": "v0-rule", "features": '{"turns":1}'})
    store.insert_observation({
        "request_id": "r2", "consumer": "proxy", "decided_tier": "T1",
        "executed_tier": "T1", "probs": "{}", "policy_version": "v0-rule",
        "features": "{}", "outcome": "ok"})
    assert store.count_labeled() == 0
    store.set_true_tier("r1", "T2")
    assert store.count_labeled() == 1
    rows = store.labeled_rows()
    assert rows[0]["request_id"] == "r1" and rows[0]["true_tier"] == "T2"
    assert store.update_outcome("r2", "escalated", executed_tier="T2") is True
    # 180d 清理
    import time
    assert store.purge_older_than(time.time() + 10) >= 2
    assert store.count_labeled() == 0