import os
import pytest
from fastapi.testclient import TestClient

os.environ.setdefault("ADMIN_PASSWORD", "test-admin-pw")
os.environ.setdefault("OLLAMA_URL", "http://127.0.0.1:9999")


@pytest.fixture
def client(tmp_path):
    log_file = tmp_path / "usage.log"
    log_file.write_text("\n".join(f"Zeile {i}" for i in range(1, 16)) + "\n")
    (tmp_path / "error.log").write_text("Fehler A\nFehler B\n")
    os.environ["LOG_FILE"] = str(log_file)

    from database import Base, engine
    Base.metadata.drop_all(bind=engine)
    Base.metadata.create_all(bind=engine)

    from admin import app
    yield TestClient(app, raise_server_exceptions=False)

    Base.metadata.drop_all(bind=engine)
    os.environ.pop("LOG_FILE", None)


AUTH = {"Authorization": "Bearer test-admin-pw"}


def test_logs_usage_returns_last_10_lines(client):
    resp = client.get("/api/logs/usage", headers=AUTH)
    assert resp.status_code == 200
    lines = resp.json()["lines"]
    assert len(lines) == 10
    assert lines[-1] == "Zeile 15"
    assert lines[0] == "Zeile 6"


def test_logs_error_returns_content(client):
    resp = client.get("/api/logs/error", headers=AUTH)
    assert resp.status_code == 200
    assert resp.json()["lines"] == ["Fehler A", "Fehler B"]


def test_logs_missing_file_returns_empty(client, tmp_path):
    os.environ["LOG_FILE"] = str(tmp_path / "nonexistent.log")
    resp = client.get("/api/logs/usage", headers=AUTH)
    assert resp.status_code == 200
    assert resp.json()["lines"] == []


def test_logs_invalid_name_returns_400(client):
    resp = client.get("/api/logs/secret", headers=AUTH)
    assert resp.status_code == 400


def test_logs_requires_auth(client):
    resp = client.get("/api/logs/usage")
    assert resp.status_code == 401