from __future__ import annotations

from collections.abc import Generator

from fastapi.testclient import TestClient
from sqlalchemy import create_engine
from sqlalchemy.orm import Session, sessionmaker
from sqlalchemy.pool import StaticPool

from app.api.deps import get_db
from app.core.agent_enums import AgentAssetStatus
from app.db.base import Base
from app.main import create_app
from app.services.agent_assets import AgentAssetService


def build_client() -> tuple[TestClient, sessionmaker[Session]]:
    engine = create_engine(
        "sqlite+pysqlite:///:memory:",
        connect_args={"check_same_thread": False},
        poolclass=StaticPool,
    )
    Base.metadata.create_all(bind=engine)
    session_factory = sessionmaker(bind=engine, autoflush=False, autocommit=False)

    app = create_app()

    def override_db() -> Generator[Session, None, None]:
        db = session_factory()
        try:
            yield db
        finally:
            db.close()

    app.dependency_overrides[get_db] = override_db
    return TestClient(app), session_factory


def test_list_agent_assets_endpoint_returns_seeded_items() -> None:
    client, _ = build_client()

    response = client.get("/api/v1/agent-assets", params={"asset_type": "rule"})

    assert response.status_code == 200
    payload = response.json()
    assert payload
    assert all(item["asset_type"] == "rule" for item in payload)
    assert any(item["code"] == "rule.expense.travel_risk_control_standard" for item in payload)


def test_get_agent_asset_detail_endpoint_returns_version_history() -> None:
    client, _ = build_client()

    list_response = client.get("/api/v1/agent-assets", params={"asset_type": "rule"})
    asset_id = next(
        item["id"]
        for item in list_response.json()
        if item["code"] == "rule.expense.travel_risk_control_standard"
    )

    response = client.get(f"/api/v1/agent-assets/{asset_id}")

    assert response.status_code == 200
    payload = response.json()
    assert payload["recent_versions"]
    assert payload["current_version_content_type"] == "markdown"
    assert payload["current_version"] == "v1.1.0"
    assert "行程闭环" in payload["current_version_content"]


def test_activate_pending_rule_endpoint_is_blocked() -> None:
    client, session_factory = build_client()

    with session_factory() as db:
        pending_rule = next(
            item
            for item in AgentAssetService(db).list_assets(asset_type="rule")
            if item.status == AgentAssetStatus.REVIEW.value
        )

    response = client.post(
        f"/api/v1/agent-assets/{pending_rule.id}/activate",
        headers={"x-actor": "pytest"},
    )

    assert response.status_code == 400
    assert "审核" in response.json()["detail"]


def test_list_audit_logs_endpoint_returns_seeded_logs() -> None:
    client, _ = build_client()

    response = client.get("/api/v1/audit-logs")

    assert response.status_code == 200
    payload = response.json()
    assert payload
    assert any(item["action"] == "review_rule" for item in payload)