from __future__ import annotations

from unittest.mock import MagicMock, patch

import pytest

from pipeline.llm.providers import (
    CrawlerOpenAiCompatibleTextLlm,
    OpenAiOfficialChatGptTextLlm,
    get_text_llm,
    reset_text_llm_client_for_tests,
)


def test_openai_official_complete_text_uses_post_and_returns_content(monkeypatch: pytest.MonkeyPatch) -> None:
    monkeypatch.setenv("OPENAI_OFFICIAL_API_KEY", "sk-test")

    def _fake_post(
        url: str,
        headers: dict,
        json: dict,
        timeout: object,
    ) -> MagicMock:
        assert "/chat/completions" in url
        assert json["messages"][0]["role"] == "system"
        r = MagicMock()
        r.json.return_value = {"choices": [{"message": {"content": "ok_out"}}]}
        r.raise_for_status = MagicMock()
        return r

    with patch(
        "pipeline.llm.providers.adapters.openai_official_chatgpt.requests.post",
        side_effect=_fake_post,
    ):
        llm = OpenAiOfficialChatGptTextLlm()
        out = llm.complete_text("S", "U", temperature=0.1)
    assert out == "ok_out"


def test_factory_selects_openai_official_when_env_set(monkeypatch: pytest.MonkeyPatch) -> None:
    reset_text_llm_client_for_tests()
    monkeypatch.setenv("MA_LLM_TEXT_PROVIDER", "chatgpt")
    monkeypatch.setenv("OPENAI_OFFICIAL_API_KEY", "sk-x")
    try:
        c = get_text_llm()
        assert isinstance(c, OpenAiOfficialChatGptTextLlm)
    finally:
        reset_text_llm_client_for_tests()
        monkeypatch.delenv("MA_LLM_TEXT_PROVIDER", raising=False)
        monkeypatch.delenv("OPENAI_OFFICIAL_API_KEY", raising=False)


def test_factory_unknown_provider_raises(monkeypatch: pytest.MonkeyPatch) -> None:
    reset_text_llm_client_for_tests()
    monkeypatch.setenv("MA_LLM_TEXT_PROVIDER", "no_such_provider")
    try:
        with pytest.raises(ValueError, match="不支持的"):
            get_text_llm()
    finally:
        reset_text_llm_client_for_tests()
        monkeypatch.delenv("MA_LLM_TEXT_PROVIDER", raising=False)


def test_default_provider_is_crawler_when_env_cleared(monkeypatch: pytest.MonkeyPatch) -> None:
    """未设置 MA_LLM_TEXT_PROVIDER 时仍为爬虫副本网关；此处只断言类型，不调真实网络。"""
    reset_text_llm_client_for_tests()
    monkeypatch.delenv("MA_LLM_TEXT_PROVIDER", raising=False)
    c = get_text_llm()
    assert isinstance(c, CrawlerOpenAiCompatibleTextLlm)
    reset_text_llm_client_for_tests()