import pytest
from pathlib import Path


def test_chroma_client_creates_persist_directory(tmp_path, monkeypatch):
    monkeypatch.setenv("CHROMA_DB_PATH", str(tmp_path / "test_chroma"))

    from app.core.config import get_settings
    get_settings.cache_clear()

    from app.core.database import get_chroma_client

    client = get_chroma_client()
    assert client is not None
    assert (tmp_path / "test_chroma").exists()


def test_chroma_client_creates_new_collection(tmp_path, monkeypatch):
    monkeypatch.setenv("CHROMA_DB_PATH", str(tmp_path / "test_chroma"))

    from app.core.config import get_settings
    get_settings.cache_clear()

    from app.core.database import get_chroma_client, get_or_create_collection
    
    client = get_chroma_client()
    collection = get_or_create_collection(client, "test_docs")
    assert collection.name == "test_docs"
    assert collection.count() == 0


def test_chroma_client_returns_existing_collection(tmp_path):
    import os
    os.environ["CHROMA_DB_PATH"] = str(tmp_path / "test_chroma")
    
    from app.core.database import get_chroma_client, get_or_create_collection
    
    client = get_chroma_client()
    collection1 = get_or_create_collection(client, "test_docs")
    collection1.add(documents=["test"], ids=["1"])
    
    collection2 = get_or_create_collection(client, "test_docs")
    assert collection2.count() == 1