# SPDX-License-Identifier: AGPL-3.0-only
# Copyright 2026-present the Unsloth AI Inc. team. All rights reserved. See /studio/LICENSE.AGPL-3.0

"""Shared pytest configuration for the backend test suite.

Puts the backend root on sys.path (mirrors app launch) and provides a hybrid
``studio_server`` session fixture for end-to-end tests with two modes:
external server (``UNSLOTH_E2E_BASE_URL``/``UNSLOTH_E2E_API_KEY``) for fast
iteration, or a fixture-managed server started/torn down per session for CI.
Model/variant for the managed mode resolve from ``--unsloth-model`` /
``--unsloth-gguf-variant``, then env vars, then ``test_studio_api.py`` defaults.
"""

import os
import sys
from pathlib import Path

import pytest

# Add backend root to sys.path (mirrors app launch)
_backend_root = Path(__file__).resolve().parent.parent
if str(_backend_root) not in sys.path:
    sys.path.insert(0, str(_backend_root))


# Pytest CLI options


def pytest_addoption(parser):
    group = parser.getgroup(
        "unsloth-e2e",
        "Unsloth Studio end-to-end test options",
    )
    group.addoption(
        "--unsloth-model",
        action = "store",
        default = None,
        help = (
            "GGUF model id used when starting a server for e2e tests. "
            "Ignored if UNSLOTH_E2E_BASE_URL is set. Overrides "
            "UNSLOTH_E2E_MODEL env var. Defaults to test_studio_api.py's "
            "DEFAULT_MODEL."
        ),
    )
    group.addoption(
        "--unsloth-gguf-variant",
        action = "store",
        default = None,
        help = (
            "GGUF variant used when starting a server for e2e tests. "
            "Ignored if UNSLOTH_E2E_BASE_URL is set. Overrides "
            "UNSLOTH_E2E_VARIANT env var. Defaults to test_studio_api.py's "
            "DEFAULT_VARIANT."
        ),
    )


# E2E server fixtures


@pytest.fixture(scope = "session")
def studio_server(request):
    """Yield ``(base_url, api_key)`` for e2e tests.

    Uses ``UNSLOTH_E2E_BASE_URL`` (requires ``UNSLOTH_E2E_API_KEY``) if set,
    else starts/tears down a fresh server via ``_start_server``. Session-scoped
    and lazy so the GGUF load happens at most once and only when requested.
    """
    external_url = os.environ.get("UNSLOTH_E2E_BASE_URL")
    if external_url:
        api_key = os.environ.get("UNSLOTH_E2E_API_KEY")
        if not api_key:
            pytest.skip(
                "UNSLOTH_E2E_BASE_URL is set but UNSLOTH_E2E_API_KEY is "
                "missing — tests that require auth cannot run against an "
                "external server without it.",
            )
        yield external_url, api_key
        return

    # Lazy import; pytest has already loaded test_studio_api, so this is a cache hit.
    import test_studio_api as _e2e

    model = (
        request.config.getoption("--unsloth-model")
        or os.environ.get("UNSLOTH_E2E_MODEL")
        or _e2e.DEFAULT_MODEL
    )
    variant = (
        request.config.getoption("--unsloth-gguf-variant")
        or os.environ.get("UNSLOTH_E2E_VARIANT")
        or _e2e.DEFAULT_VARIANT
    )

    proc, api_key = _e2e._start_server(model, variant)
    try:
        yield f"http://{_e2e.HOST}:{_e2e.PORT}", api_key
    finally:
        _e2e._kill_server(proc)


@pytest.fixture
def base_url(studio_server):
    """Base URL for the e2e Studio server (from ``studio_server``)."""
    return studio_server[0]


@pytest.fixture
def api_key(studio_server):
    """API key for the e2e Studio server (from ``studio_server``)."""
    return studio_server[1]