from pathlib import Path

import pytest
from tomlkit import dumps, document


def _write_legacy_settings(path: Path) -> None:
    data = document()
    data["general"] = {
        "keyboardLayout": 1,
        "cthulhuModifierKeys": ["Insert", "KP_Insert"],
        "progressBarVerbosity": 1,
        "progressBarUpdateInterval": 10,
        "ocrLanguageCode": "eng",
        "ocrScaleFactor": 3,
        "ocrCopyToClipboard": True,
    }
    data["profiles"] = {
        "default": {
            "profile": ["Default", "default"],
            "keybindings": {},
            "pronunciations": {},
        }
    }
    path.write_text(dumps(data), encoding="utf-8")


@pytest.mark.unit
def test_migrates_legacy_keys_to_schema_tables(tmp_path):
    settings_path = Path(tmp_path, "user-settings.toml")
    _write_legacy_settings(settings_path)

    from cthulhu import gsettings_registry

    registry = gsettings_registry.get_registry()
    registry.migrate_all(str(tmp_path))

    migrated = settings_path.read_text(encoding="utf-8")
    assert "format-version = 2" in migrated
    assert "[profiles.default.keybindings]" in migrated
    assert 'keyboard-layout = "desktop"' in migrated
    assert 'desktop-modifier-keys = ["Insert", "KP_Insert"]' in migrated
    assert "[profiles.default.ocr]" in migrated
    assert 'language-code = "eng"' in migrated
    assert "cthulhuModifierKeys" not in migrated
    assert "progressBarUpdateInterval" not in migrated


@pytest.mark.unit
def test_migration_is_idempotent(tmp_path):
    settings_path = Path(tmp_path, "user-settings.toml")
    _write_legacy_settings(settings_path)

    from cthulhu import gsettings_registry

    registry = gsettings_registry.get_registry()
    registry.migrate_all(str(tmp_path))
    first = settings_path.read_text(encoding="utf-8")
    registry.migrate_all(str(tmp_path))
    second = settings_path.read_text(encoding="utf-8")

    assert second == first