import json
import sys
import tempfile
import unittest
from pathlib import Path

ROOT = Path(__file__).resolve().parents[1]
SRC = ROOT / "src"
if str(SRC) not in sys.path:
    sys.path.insert(0, str(SRC))

from config import load


class ConfigTests(unittest.TestCase):
    def test_defaults_when_file_missing(self):
        missing = Path(tempfile.gettempdir()) / "lel_missing_config_test.json"
        if missing.exists():
            missing.unlink()

        cfg = load(str(missing))

        self.assertEqual(cfg.daemon.hotkey, "Cmd+m")
        self.assertEqual(cfg.recording.input, "")
        self.assertEqual(cfg.stt.model, "base")
        self.assertEqual(cfg.stt.device, "cpu")
        self.assertEqual(cfg.injection.backend, "clipboard")
        self.assertTrue(cfg.ai.enabled)
        self.assertFalse(cfg.logging.log_transcript)

    def test_loads_nested_config(self):
        payload = {
            "daemon": {"hotkey": "Ctrl+space"},
            "recording": {"input": 3},
            "stt": {"model": "small", "device": "cuda"},
            "injection": {"backend": "injection"},
            "ai": {"enabled": False},
            "logging": {"log_transcript": True},
        }
        with tempfile.TemporaryDirectory() as td:
            path = Path(td) / "config.json"
            path.write_text(json.dumps(payload), encoding="utf-8")

            cfg = load(str(path))

        self.assertEqual(cfg.daemon.hotkey, "Ctrl+space")
        self.assertEqual(cfg.recording.input, 3)
        self.assertEqual(cfg.stt.model, "small")
        self.assertEqual(cfg.stt.device, "cuda")
        self.assertEqual(cfg.injection.backend, "injection")
        self.assertFalse(cfg.ai.enabled)
        self.assertTrue(cfg.logging.log_transcript)

    def test_loads_legacy_keys(self):
        payload = {
            "hotkey": "Alt+m",
            "input": "Mic",
            "whisper_model": "tiny",
            "whisper_device": "cpu",
            "injection_backend": "clipboard",
            "ai_enabled": False,
            "log_transcript": True,
        }
        with tempfile.TemporaryDirectory() as td:
            path = Path(td) / "config.json"
            path.write_text(json.dumps(payload), encoding="utf-8")

            cfg = load(str(path))

        self.assertEqual(cfg.daemon.hotkey, "Alt+m")
        self.assertEqual(cfg.recording.input, "Mic")
        self.assertEqual(cfg.stt.model, "tiny")
        self.assertEqual(cfg.stt.device, "cpu")
        self.assertEqual(cfg.injection.backend, "clipboard")
        self.assertFalse(cfg.ai.enabled)
        self.assertTrue(cfg.logging.log_transcript)

    def test_invalid_injection_backend_raises(self):
        payload = {"injection": {"backend": "invalid"}}
        with tempfile.TemporaryDirectory() as td:
            path = Path(td) / "config.json"
            path.write_text(json.dumps(payload), encoding="utf-8")

            with self.assertRaisesRegex(ValueError, "injection.backend"):
                load(str(path))

    def test_invalid_logging_flag_raises(self):
        payload = {"logging": {"log_transcript": "yes"}}
        with tempfile.TemporaryDirectory() as td:
            path = Path(td) / "config.json"
            path.write_text(json.dumps(payload), encoding="utf-8")

            with self.assertRaisesRegex(ValueError, "logging.log_transcript"):
                load(str(path))


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