import type { Dictionary } from "./types";
import { enDictionary } from "./dictionaries/en";
import { ruDictionary } from "./dictionaries/ru";
import { nlDictionary } from "./dictionaries/nl";
import { esDictionary } from "./dictionaries/es";

export const locales = [
  "en",
  "ru",
  "es",
  "pt",
  "fr",
  "de",
  "it",
  "zh-CN",
  "zh-TW",
  "ja",
  "ko",
  "hi",
  "ar",
  "tr",
  "pl",
  "uk",
  "nl",
  "sv",
  "no",
  "da",
  "fi",
  "cs",
  "sk",
  "sl",
  "ro",
  "hu",
  "el",
  "he",
  "fa",
  "ur",
  "id",
  "ms",
  "th",
  "vi",
  "fil",
  "bn",
  "ta",
  "te",
  "mr",
  "pa",
  "bg",
  "sr",
  "hr",
  "lt",
  "lv",
  "et",
  "uz",
  "kk",
  "az",
  "ka"
] as const;

export type Locale = (typeof locales)[number];

export const fallbackLocale: Locale = "en";

export const rtlLocales: Locale[] = ["ar", "fa", "he", "ur"];

const localeMeta: Partial<Record<Locale, { title: string; description: string }>> = {
  en: {
    title: "AllAI Studio - Unified Generative AI Workspace",
    description: "Create and orchestrate generative AI workflows for imagery, video, and audio."
  },
  ru: {
    title: "AllAI Studio — Единое пространство для генеративного ИИ",
    description: "Стройте пайплайны для изображений, видео и аудио в одной студии."
  }
};

export const dictionaries: Partial<Record<Locale, Dictionary>> = {
  en: enDictionary,
  ru: ruDictionary,
  nl: nlDictionary,
  es: esDictionary
};

export function resolveLocale(input?: string | null): Locale {
  if (!input) return fallbackLocale;
  const normalized = input.toLowerCase();
  if (locales.includes(normalized as Locale)) {
    return normalized as Locale;
  }
  const base = normalized.split("-")[0] as Locale;
  if (locales.includes(base)) {
    return base;
  }
  return fallbackLocale;
}

export function getLocaleDisplayName(locale: Locale, displayLocale: Locale = fallbackLocale): string {
  try {
    const formatter = new Intl.DisplayNames([displayLocale], { type: "language" });
    return formatter.of(locale) ?? locale.toUpperCase();
  } catch {
    return locale.toUpperCase();
  }
}

export function getMetadataForLocale(locale: Locale) {
  return localeMeta[locale] ?? localeMeta[fallbackLocale]!;
}