import unittest

from src.lyricflow_core.api.analysis import analysis_service


class TestSpellcheck(unittest.TestCase):
    def test_unknown_word_detection(self):
        self.assertFalse(analysis_service.is_known_word("gumguat"))

    def test_known_word_detection(self):
        self.assertTrue(analysis_service.is_known_word("combat"))

    def test_suggestions_for_typo(self):
        suggestions = analysis_service.spelling_suggestions("helo")
        self.assertIn("hello", suggestions)

    def test_suggestions_handle_transposition_typo(self):
        suggestions = analysis_service.spelling_suggestions("wrod")
        self.assertIn("word", suggestions)

    def test_suggestions_handle_common_suffix_typo(self):
        suggestions = analysis_service.spelling_suggestions("spelle")
        self.assertTrue("spell" in suggestions or "spelled" in suggestions)

    def test_autocorrect_candidate_for_typo(self):
        self.assertEqual("nothing", analysis_service.autocorrect_candidate("nothign"))

    def test_autocorrect_candidate_rejects_uncertain_word(self):
        self.assertIsNone(analysis_service.autocorrect_candidate("gumguat"))

    def test_spelling_issues_respect_lmd_syntax(self):
        text = "# helo\n[Voice: gumguat]\nhelo world"
        issues = analysis_service.spelling_issues(text)
        normalized = [item["normalized"] for item in issues]
        self.assertIn("helo", normalized)
        self.assertNotIn("gumguat", normalized)

    def test_spelling_issues_respect_unclosed_tag(self):
        text = "[Voice: gumguat\nhelo world"
        issues = analysis_service.spelling_issues(text)
        normalized = [item["normalized"] for item in issues]
        self.assertNotIn("gumguat", normalized)
        self.assertIn("helo", normalized)


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