"""Tests for sanguo_api.main container entrypoint (app loader + SPA mount).

Covers Task S0.1: build_app(config_path, static_dir) loads backtest.yaml and
mounts SPA static files when the directory exists.
"""
from fastapi.testclient import TestClient

from sanguo_api.main import build_app


def _cfg(tmp_path) -> str:
    cfg = tmp_path / "bt.yaml"
    cfg.write_text(
        "backtest:\n  max_workers: 1\n  db_path: %s\n  file_dir: %s\n"
        "api:\n  host: 0.0.0.0\n  port: 8000\n"
        "auth:\n  username: admin\n  password_hash: x\n  jwt_secret: s\n  token_expire_minutes: 60\n"
        "pool:\n  max_workers: 1\n" % (tmp_path / "r.db", tmp_path / "f")
    )
    return str(cfg)


def _has_route(app, path: str, method: str = "GET") -> bool:
    """路由存在性探测（FastAPI 0.139+ 兼容）。

    FastAPI 0.139 起 include_router 的子路由包成 _IncludedRouter，不再 flatten
    到 app.routes 顶层，因此 [r.path for r in app.routes] 看不到 /api/v1/* 路由。
    用 TestClient 实际探测：404 = 路由不存在，其他状态码（405/401/200）= 存在。
    前后端对齐的真实验证：前端能打的端点，后端确实挂载。
    """
    return TestClient(app).request(method, path).status_code != 404


def test_build_app_has_api_routes(tmp_path):
    app = build_app(_cfg(tmp_path))
    assert _has_route(app, "/api/v1/auth/login", "POST")


def test_build_app_mounts_spa_when_static_exists(tmp_path):
    spa = tmp_path / "spa"
    spa.mkdir()
    (spa / "index.html").write_text("<h1>SPA</h1>")
    app = build_app(_cfg(tmp_path), static_dir=str(spa))
    paths = [getattr(r, "path", "") for r in app.routes]
    assert "/" in paths


def test_build_app_no_static_skips_mount(tmp_path):
    """When static dir absent, build must still succeed (no SPA mount)."""
    app = build_app(_cfg(tmp_path), static_dir=str(tmp_path / "nope"))
    assert _has_route(app, "/api/v1/auth/login", "POST")