import os
import pytest
from app.config import Settings


def test_settings_loads_all_required_fields(monkeypatch):
    monkeypatch.setenv("NEXTCLOUD_WEBDAV_URL", "https://nc/remote.php/dav/files/u")
    monkeypatch.setenv("NEXTCLOUD_USER", "u")
    monkeypatch.setenv("NEXTCLOUD_APP_PASSWORD", "pw")
    monkeypatch.setenv("OLLAMA_URL", "http://ollama:11434")
    monkeypatch.setenv("OLLAMA_EMBED_MODEL", "qwen3-embedding:0.6b")
    monkeypatch.setenv("QDRANT_URL", "http://qdrant:6333")
    monkeypatch.setenv("QDRANT_COLLECTION", "rag_test")
    monkeypatch.setenv("WEBHOOK_SECRET", "secret")

    s = Settings()

    assert s.nextcloud_user == "u"
    assert s.qdrant_collection == "rag_test"
    assert s.ingest_root == "Documents/THB/Studium"  # default
    assert s.chunk_size_words == 500
    assert s.chunk_overlap_words == 50
    assert s.log_level == "INFO"


def test_settings_overrides_defaults(monkeypatch):
    for k, v in {
        "NEXTCLOUD_WEBDAV_URL": "x", "NEXTCLOUD_USER": "x",
        "NEXTCLOUD_APP_PASSWORD": "x", "OLLAMA_URL": "x",
        "OLLAMA_EMBED_MODEL": "x", "QDRANT_URL": "x",
        "QDRANT_COLLECTION": "x", "WEBHOOK_SECRET": "x",
        "INGEST_ROOT": "Other/Path",
        "CHUNK_SIZE_WORDS": "300",
        "CHUNK_OVERLAP_WORDS": "30",
    }.items():
        monkeypatch.setenv(k, v)

    s = Settings()

    assert s.ingest_root == "Other/Path"
    assert s.chunk_size_words == 300
    assert s.chunk_overlap_words == 30


def test_settings_missing_required_raises(monkeypatch):
    for k in ["NEXTCLOUD_WEBDAV_URL", "NEXTCLOUD_USER", "NEXTCLOUD_APP_PASSWORD",
              "OLLAMA_URL", "OLLAMA_EMBED_MODEL", "QDRANT_URL",
              "QDRANT_COLLECTION", "WEBHOOK_SECRET"]:
        monkeypatch.delenv(k, raising=False)

    with pytest.raises(Exception):
        Settings()