"""配置层测试：默认 SQLite 相对路径解析、config.yaml / .env 加载约定。"""

from __future__ import annotations

import os
from pathlib import Path

from app.core.config import PROJECT_ROOT, _load_env_file, get_settings


def test_project_root_points_to_repo_root() -> None:
    # config.py 位于 <root>/backend/app/core/ → 项目根应含 config.yaml 与 backend/
    assert (PROJECT_ROOT / "config.yaml").exists()
    assert (PROJECT_ROOT / "backend").is_dir()


def test_default_database_url_resolves_to_project_data_dir() -> None:
    settings = get_settings()
    assert settings.database_url.startswith("sqlite:///")
    # 相对路径应解析到 <项目根>/data/quant.db
    assert settings.database_url.endswith("/data/quant.db")
    db_path = Path(settings.database_url.removeprefix("sqlite:///"))
    assert db_path.is_absolute()
    assert db_path == PROJECT_ROOT / "data" / "quant.db"


def test_settings_loaded_from_config_yaml() -> None:
    settings = get_settings()
    assert settings.app_name == "qlib-platform"
    assert settings.api_prefix == "/api"
    assert settings.data_source_primary == "tushare"
    assert settings.data_source_fallback == "sina"


def test_env_file_loading(tmp_path: Path, monkeypatch) -> None:
    monkeypatch.delenv("TUSHARE_TOKEN", raising=False)
    env_file = tmp_path / ".env"
    env_file.write_text(
        "# comment\nTUSHARE_TOKEN=demo-token\nDATABASE_URL=sqlite:////tmp/x.db\n",
        encoding="utf-8",
    )
    _load_env_file(env_file)
    assert os.environ.get("TUSHARE_TOKEN") == "demo-token"

    # 不覆盖已存在的环境变量（shell 环境优先）
    monkeypatch.setenv("TUSHARE_TOKEN", "kept")
    _load_env_file(env_file)
    assert os.environ["TUSHARE_TOKEN"] == "kept"


def test_llm_from_config_yaml() -> None:
    """URL 与模型名来自 config.yaml 明文，Key 仅来自环境（当前未设置）。"""
    settings = get_settings()
    assert settings.llm_model == "qwen-plus"
    assert settings.llm_base_url == "https://dashscope.aliyuncs.com/compatible-mode/v1"
    assert settings.llm_api_key == ""  # .env 未提供 → 空，Agent 层给出引导提示


def test_llm_env_overrides_yaml(monkeypatch) -> None:
    from app.core.config import get_settings

    monkeypatch.setenv("LLM_MODEL", "env-model")
    monkeypatch.setenv("LLM_BASE_URL", "https://example.com/v1")
    monkeypatch.setenv("LLM_API_KEY", "sk-test")
    get_settings.cache_clear()  # Settings 有 lru_cache，刷新以读取新环境变量
    s = get_settings()
    assert s.llm_model == "env-model"
    assert s.llm_base_url == "https://example.com/v1"
    assert s.llm_api_key == "sk-test"
    get_settings.cache_clear()