"""Vue I18n detector."""

import json
from pathlib import Path
from typing import Optional

from i18n_guardian.detectors.base import Detector


class VueI18nDetector(Detector):
    """Detect Vue I18n library usage."""

    @property
    def name(self) -> str:
        return "vue-i18n"

    @property
    def patterns(self) -> list:
        return ["package.json", "vue.config.js", "vite.config.js"]

    def detect(self, path: Path) -> Optional[str]:
        """Check for Vue I18n usage."""
        package_json = path / "package.json"
        if package_json.exists():
            try:
                with open(package_json, "r", encoding="utf-8") as f:
                    data = json.load(f)
                    dependencies = data.get("dependencies", {})
                    dev_dependencies = data.get("devDependencies", {})
                    all_deps = {**dependencies, **dev_dependencies}
                    if "vue-i18n" in all_deps:
                        return self.name
            except (json.JSONDecodeError, OSError):
                pass

        vue_config = path / "vue.config.js"
        if vue_config.exists():
            content = vue_config.read_text(encoding="utf-8")
            if "vue-i18n" in content:
                return self.name

        vite_config = path / "vite.config.js"
        if vite_config.exists():
            content = vite_config.read_text(encoding="utf-8")
            if "vue-i18n" in content:
                return self.name

        for vue_file in path.rglob("*.vue"):
            try:
                content = vue_file.read_text(encoding="utf-8")
                if "$t(" in content or "$tc(" in content:
                    return self.name
            except OSError:
                continue

        return None

    def get_i18n_functions(self) -> list:
        """Get Vue I18n function names."""
        return [
            "$t",
            "$tc",
            "$d",
            "$n",
            "$te",
            "t",
            "tc",
            "d",
            "n",
        ]