"""Tests for AI title batch generation core (docs/11 §17.1 / §17.7)."""
import sys
import unittest
from pathlib import Path

sys.path.insert(0, str(Path(__file__).parent.parent / "src"))


class TestAiTitleCore(unittest.TestCase):
    def test_generate_titles_one_request_returns_list(self):
        from core.ai_title import generate_titles

        client = _RecordingTextClient(["纯棉短袖T恤", "印花连衣裙", "碎花雪纺衫"])
        titles = generate_titles("生成 3 条标题", model_config={}, api_client=client)

        self.assertEqual(titles, ["纯棉短袖T恤", "印花连衣裙", "碎花雪纺衫"])
        self.assertEqual(client.calls, 1)            # 只请求一次
        self.assertEqual(client.image_paths, [None])  # 纯文本，不传图

    def test_generate_titles_uses_4k_read_timeout(self):
        # §19.30/§17.8：标题生成借 4K 档（600s 读取超时），不用默认 1K 的 240s
        from core.ai_title import _TITLE_TIMEOUT_RESOLUTION, generate_titles

        self.assertEqual(_TITLE_TIMEOUT_RESOLUTION, "4K")
        client = _RecordingTextClient(["a", "b"])
        generate_titles("生成 2 条标题", model_config={}, api_client=client)
        self.assertEqual(client.resolutions, ["4K"])

    def test_generate_titles_propagates_client_error(self):
        from core.ai_title import generate_titles

        with self.assertRaises(RuntimeError):
            generate_titles("x", model_config={}, api_client=_FailingTextClient())


class _RecordingTextClient:
    def __init__(self, titles):
        self._titles = titles
        self.calls = 0
        self.image_paths = []
        self.resolutions = []

    def generate_texts(self, prompt, image_path=None, resolution="1K"):
        self.calls += 1
        self.image_paths.append(image_path)
        self.resolutions.append(resolution)
        return list(self._titles)


class _FailingTextClient:
    def generate_texts(self, prompt, image_path=None, resolution="1K"):
        raise RuntimeError("boom")


if __name__ == "__main__":
    unittest.main()