from __future__ import annotations

from importlib.util import module_from_spec, spec_from_file_location
from pathlib import Path

import json

SCRIPT_PATH = Path(__file__).resolve().parents[2] / "scripts" / "i18n_validate.py"
MODULE_SPEC = spec_from_file_location("i18n_validate_script", SCRIPT_PATH)
assert MODULE_SPEC is not None
assert MODULE_SPEC.loader is not None
I18N_VALIDATE = module_from_spec(MODULE_SPEC)
MODULE_SPEC.loader.exec_module(I18N_VALIDATE)


def write_locale_file(locales_root: Path, locale: str, file_name: str, payload: dict[str, object]) -> None:
    locale_dir = locales_root / locale
    locale_dir.mkdir(parents=True, exist_ok=True)
    (locale_dir / file_name).write_text(json.dumps(payload, ensure_ascii=False, indent=2), encoding="utf-8")


def test_validate_json_locales_rejects_han_characters_in_english_locale(tmp_path: Path) -> None:
    locales_root = tmp_path / "locales"
    write_locale_file(locales_root, "zh-CN", "core.json", {"consent.prompt": '输入"同意"继续'})
    write_locale_file(locales_root, "en-US", "core.json", {"consent.prompt": 'Type "confirmed" or "同意" to continue'})

    errors = I18N_VALIDATE.validate_json_locales(locales_root)

    assert any("consent.prompt" in error and "仍包含中文字符" in error for error in errors)


def test_validate_json_locales_rejects_untranslated_han_source_in_other_target_locales(tmp_path: Path) -> None:
    locales_root = tmp_path / "locales"
    write_locale_file(locales_root, "zh-CN", "core.json", {"greeting": "你好，世界"})
    write_locale_file(locales_root, "ja", "core.json", {"greeting": "你好，世界"})

    errors = I18N_VALIDATE.validate_json_locales(locales_root)

    assert any("greeting" in error and "直接保留了包含中文字符的 source 文案" in error for error in errors)


def test_validate_json_locales_avoids_false_positive_when_plural_categories_do_not_align(tmp_path: Path) -> None:
    locales_root = tmp_path / "locales"
    write_locale_file(
        locales_root,
        "zh-CN",
        "core.json",
        {
            "tasks.cancelled": {
                "one": "中文单数",
                "other": "中文复数",
            }
        },
    )
    write_locale_file(
        locales_root,
        "ja",
        "core.json",
        {
            "tasks.cancelled": {
                "many": "中文单数",
                "other": "已翻译",
            }
        },
    )

    errors = I18N_VALIDATE.validate_json_locales(locales_root)

    assert any("tasks.cancelled" in error and "plural category 不一致" in error for error in errors)
    assert not any("tasks.cancelled" in error and "直接保留了包含中文字符的 source 文案" in error for error in errors)