"""Tests for the Qwen TTS client wrapper (language handling and payloads)."""

import tempfile
import unittest
from pathlib import Path
from unittest.mock import MagicMock, patch

from converter import config
from converter.tts import QwenTTSClient, normalize_language


class NormalizeLanguageTests(unittest.TestCase):
    def test_display_names_case_insensitive(self):
        self.assertEqual(normalize_language("english"), "English")
        self.assertEqual(normalize_language("ENGLISH"), "English")
        self.assertEqual(normalize_language(" Japanese "), "Japanese")

    def test_auto_accepted(self):
        self.assertEqual(normalize_language("auto"), "Auto")
        self.assertEqual(normalize_language("Auto"), "Auto")

    def test_iso_aliases(self):
        self.assertEqual(normalize_language("en"), "English")
        self.assertEqual(normalize_language("ja"), "Japanese")
        self.assertEqual(normalize_language("zh"), "Chinese")
        self.assertEqual(normalize_language("ko"), "Korean")
        self.assertEqual(normalize_language("de"), "German")
        self.assertEqual(normalize_language("fr"), "French")
        self.assertEqual(normalize_language("ru"), "Russian")
        self.assertEqual(normalize_language("pt"), "Portuguese")
        self.assertEqual(normalize_language("es"), "Spanish")
        self.assertEqual(normalize_language("it"), "Italian")

    def test_all_supported_languages_round_trip(self):
        for name in config.TTS_LANGUAGES:
            self.assertEqual(normalize_language(name.lower()), name)

    def test_unknown_language_rejected_with_guidance(self):
        with self.assertRaises(ValueError) as ctx:
            normalize_language("klingon")
        message = str(ctx.exception)
        self.assertIn("klingon", message)
        self.assertIn("English", message)

    def test_none_and_empty_rejected(self):
        with self.assertRaises(ValueError):
            normalize_language(None)
        with self.assertRaises(ValueError):
            normalize_language("   ")


class QwenTTSClientLanguageTests(unittest.TestCase):
    """Language validation and defaults, without touching the network."""

    def _make_client(self, **kwargs):
        with patch.object(QwenTTSClient, "_connect"):
            return QwenTTSClient(**kwargs)

    def test_default_follows_config_for_each_mode(self):
        custom = self._make_client(voice_mode=config.VOICE_MODE_CUSTOM)
        self.assertEqual(custom.language, config.CUSTOM_VOICE_LANGUAGE)
        clone = self._make_client(voice_mode=config.VOICE_MODE_CLONE,
                                  voice_clone_ref_audio="ref.wav")
        self.assertEqual(clone.language, config.VOICE_CLONE_LANGUAGE)

    def test_explicit_language_normalized(self):
        client = self._make_client(voice_mode=config.VOICE_MODE_CUSTOM, language="ja")
        self.assertEqual(client.language, "Japanese")

    def test_invalid_language_fails_before_connect(self):
        with patch.object(QwenTTSClient, "_connect") as mock_connect:
            with self.assertRaises(ValueError):
                QwenTTSClient(language="klingon")
        mock_connect.assert_not_called()


class PayloadLanguageTests(unittest.TestCase):
    """The language must reach the API payload in every endpoint variant."""

    def setUp(self):
        self._tmp = tempfile.TemporaryDirectory()
        self.ref_audio = Path(self._tmp.name) / "reference.wav"
        self.ref_audio.write_bytes(b"x")

    def tearDown(self):
        self._tmp.cleanup()

    def _custom_client(self, language, endpoint, api_info=None):
        client = QwenTTSClient.__new__(QwenTTSClient)
        client.voice_mode = config.VOICE_MODE_CUSTOM
        client.language = language
        client.api_info = api_info if api_info is not None else {
            "named_endpoints": {endpoint: {}}
        }
        client.client = MagicMock()
        return client

    def _clone_client(self, language, endpoint, api_info=None, ref_text="hello"):
        client = QwenTTSClient.__new__(QwenTTSClient)
        client.voice_mode = config.VOICE_MODE_CLONE
        client.language = language
        client.voice_clone_ref_audio = str(self.ref_audio)
        client.voice_clone_ref_text = ref_text
        client.clone_api_info = api_info if api_info is not None else {
            "named_endpoints": {endpoint: {}}
        }
        client.clone_client = MagicMock()
        client._ref_audio_filedata = {"dummy": "payload"}
        return client

    def test_custom_voice_run_instruct_uses_language(self):
        client = self._custom_client("Japanese", "/run_instruct")
        client._generate_custom_voice("text")
        kwargs = client.client.predict.call_args.kwargs
        self.assertEqual(kwargs["lang_disp"], "Japanese")

    def test_custom_voice_alt_endpoint_uses_language(self):
        client = self._custom_client("French", "/run_custom_voice")
        client._generate_custom_voice("text")
        kwargs = client.client.predict.call_args.kwargs
        self.assertEqual(kwargs["language"], "French")

    def test_voice_clone_run_voice_clone_uses_language(self):
        client = self._clone_client("Japanese", "/run_voice_clone")
        client._generate_voice_clone("text")
        kwargs = client.clone_client.predict.call_args.kwargs
        self.assertEqual(kwargs["lang_disp"], "Japanese")

    def test_voice_clone_alt_endpoint_uses_language(self):
        client = self._clone_client("Korean", "/generate_voice_clone")
        client._generate_voice_clone("text")
        kwargs = client.clone_client.predict.call_args.kwargs
        self.assertEqual(kwargs["language"], "Korean")

    def test_voice_clone_alt_endpoint_includes_optional_params(self):
        api_info = {
            "named_endpoints": {
                "/generate_voice_clone": {
                    "parameters": [
                        {"parameter_name": "model_size"},
                        {"parameter_name": "seed"},
                    ]
                }
            }
        }
        client = self._clone_client("English", "/generate_voice_clone", api_info=api_info)
        client._generate_voice_clone("text")
        kwargs = client.clone_client.predict.call_args.kwargs
        self.assertEqual(kwargs["model_size"], config.VOICE_CLONE_MODEL_SIZE)
        self.assertEqual(kwargs["seed"], config.VOICE_CLONE_SEED)
        self.assertNotIn("max_chunk_chars", kwargs)


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