"""AppState 和依赖注入测试."""

import pytest

from src.server.deps import AppState


@pytest.fixture(autouse=True)
def _clean_env(monkeypatch):
    """清除环境变量防止其他测试污染."""
    monkeypatch.delenv("MD_VECTOR_DB_COLLECTION", raising=False)
    monkeypatch.delenv("MD_VECTOR_DB_DATA_DIR", raising=False)


class TestAppState:
    """AppState 类测试."""

    def test_init_with_config(self):
        """使用默认配置初始化."""
        state = AppState()
        assert state.config is not None
        assert state.db is not None
        assert state.embedder is not None
        assert state.default_collection == state.config.chroma.collection_name

    def test_get_searcher_returns_cached(self):
        """同一 collection 多次调用返回同一实例."""
        state = AppState()
        s1 = state.get_searcher("test_coll")
        s2 = state.get_searcher("test_coll")
        assert s1 is s2

    def test_get_searcher_different_collections(self):
        """不同 collection 返回不同实例."""
        state = AppState()
        s1 = state.get_searcher("coll_a")
        s2 = state.get_searcher("coll_b")
        assert s1 is not s2

    def test_get_searcher_uses_default_when_none(self):
        """collection 为 None 时使用默认值."""
        state = AppState()
        s = state.get_searcher(None)
        assert s.collection_name == state.default_collection

    def test_get_ingestor_returns_cached(self):
        """同一 collection 多次调用返回同一实例."""
        state = AppState()
        i1 = state.get_ingestor("test_coll")
        i2 = state.get_ingestor("test_coll")
        assert i1 is i2

    def test_default_collection_from_config(self):
        """默认 collection 名从配置读取."""
        state = AppState()
        assert isinstance(state.default_collection, str)
        assert len(state.default_collection) > 0

    def test_list_collections_with_stats(self):
        """列出集合统计."""
        state = AppState()
        result = state.list_collections_with_stats()
        assert isinstance(result, list)

    def test_is_healthy_returns_status(self):
        """健康检查返回正确结构."""
        state = AppState()
        result = state.is_healthy()
        assert "status" in result
        assert "checks" in result
        assert "chromadb" in result["checks"]
        assert "embedder" in result["checks"]

    def test_is_healthy_chromadb_ok(self):
        """健康检查 ChromaDB 正常."""
        state = AppState()
        result = state.is_healthy()
        assert result["checks"]["chromadb"]["status"] == "ok"

    def test_is_healthy_embedder_ok(self):
        """健康检查 Embedder 正常."""
        state = AppState()
        result = state.is_healthy()
        assert result["checks"]["embedder"]["status"] == "ok"

    def test_is_healthy_no_detail_leak(self):
        """健康检查不泄露内部详情."""
        state = AppState()
        result = state.is_healthy()
        for component in ("chromadb", "embedder"):
            detail = result["checks"][component].get("detail", "")
            if detail:
                # 如果出错，detail 应该是通用消息，不是异常堆栈
                assert "unavailable" in str(detail).lower() or len(detail) < 100