"""
Unit tests for application settings (offline).

Covers the OLLAMA_MODEL env collision: the deployed container sets
OLLAMA_MODEL=nomic-embed-text for embeddings, which must NOT shadow the
generation model setting (ollama_llm_model / OLLAMA_LLM_MODEL).
"""

import pytest

from src.config import Settings

# Required fields so Settings can be constructed without a .env file
REQUIRED = {
    "library_api_key": "test-key",
    "neo4j_password": "test-pass",
    "wikijs_db_password": "test-pass",
}


@pytest.mark.unit
class TestOllamaModelResolution:
    """Generation model resolution must be immune to the OLLAMA_MODEL env var."""

    def test_ollama_model_env_does_not_shadow_generation_model(self, monkeypatch):
        """The container env OLLAMA_MODEL (embedding model) must not leak into ollama_llm_model."""
        monkeypatch.setenv("OLLAMA_MODEL", "nomic-embed-text")

        settings = Settings(_env_file=None, **REQUIRED)

        assert settings.ollama_llm_model == "gemma4:e2b"
        assert settings.ollama_llm_model != "nomic-embed-text"

    def test_generation_model_default(self, monkeypatch):
        monkeypatch.delenv("OLLAMA_LLM_MODEL", raising=False)

        settings = Settings(_env_file=None, **REQUIRED)

        assert settings.ollama_llm_model == "gemma4:e2b"

    def test_generation_model_from_dedicated_env_var(self, monkeypatch):
        """OLLAMA_LLM_MODEL is the dedicated env var for the generation model."""
        monkeypatch.setenv("OLLAMA_MODEL", "nomic-embed-text")
        monkeypatch.setenv("OLLAMA_LLM_MODEL", "mistral-nemo:latest")

        settings = Settings(_env_file=None, **REQUIRED)

        assert settings.ollama_llm_model == "mistral-nemo:latest"

    def test_embedding_model_setting_untouched(self, monkeypatch):
        """The embedding model keeps its own setting and env var."""
        monkeypatch.setenv("OLLAMA_EMBEDDING_MODEL", "nomic-embed-text")

        settings = Settings(_env_file=None, **REQUIRED)

        assert settings.ollama_embedding_model == "nomic-embed-text"

    def test_legacy_setting_name_removed(self):
        """The old ollama_model attribute must be gone so nothing binds to OLLAMA_MODEL."""
        settings = Settings(_env_file=None, **REQUIRED)

        assert not hasattr(settings, "ollama_model")