import type { AppLocale } from "../locale";
import { DEFAULT_LOCALE } from "../locale";

export type LoginMessages = {
  title: string;
  description: string;
  emailLabel: string;
  passwordLabel: string;
  submitIdle: string;
  submitLoading: string;
  themeToggleLabel: string;
  errorLoginFailed: string;
  errorNetwork: string;
  signupPromptPrefix: string;
  signupLinkText: string;
  signupPromptSuffix: string;
};

export type SignupMessages = {
  title: string;
  description: string;
  emailLabel: string;
  passwordLabel: string;
  passwordConfirmLabel: string;
  submitIdle: string;
  submitLoading: string;
  mismatchError: string;
  signupFailedFallbackError: string;
  errorNetwork: string;
  passwordStrengthPrefix: string;
  passwordStrengthWeak: string;
  passwordStrengthMedium: string;
  passwordStrengthStrong: string;
  loginPromptPrefix: string;
  loginLinkText: string;
  loginPromptSuffix: string;
};

export type AuthMessages = {
  login: LoginMessages;
  signup: SignupMessages;
};

const AUTH_MESSAGES: Record<AppLocale, AuthMessages> = {
  en: {
    login: {
      title: "Log in",
      description: "Sign in to manage and save your projects.",
      emailLabel: "Email",
      passwordLabel: "Password",
      submitIdle: "Log in",
      submitLoading: "Logging in...",
      themeToggleLabel: "Toggle theme",
      errorLoginFailed: "Failed to log in. Please try again.",
      errorNetwork: "A network error occurred. Please try again later.",
      signupPromptPrefix: "Don't have an account yet?",
      signupLinkText: "Sign up",
      signupPromptSuffix: "",
    },
    signup: {
      title: "Sign up",
      description: "Create a new account to save and manage your projects.",
      emailLabel: "Email",
      passwordLabel: "Password",
      passwordConfirmLabel: "Confirm password",
      submitIdle: "Sign up",
      submitLoading: "Signing up...",
      mismatchError: "Password and confirmation do not match.",
      signupFailedFallbackError: "Failed to sign up. Please try again.",
      errorNetwork: "A network error occurred. Please try again later.",
      passwordStrengthPrefix: "Password strength:",
      passwordStrengthWeak: "Weak",
      passwordStrengthMedium: "Medium",
      passwordStrengthStrong: "Strong",
      loginPromptPrefix: "Already have an account?",
      loginLinkText: "Log in",
      loginPromptSuffix: "",
    },
  },
  ko: {
    login: {
      title: "로그인",
      description: "프로젝트를 관리하려면 먼저 계정으로 로그인하세요.",
      emailLabel: "이메일",
      passwordLabel: "비밀번호",
      submitIdle: "로그인",
      submitLoading: "로그인 중...",
      themeToggleLabel: "테마 전환",
      errorLoginFailed: "로그인에 실패했습니다. 다시 시도해 주세요.",
      errorNetwork: "네트워크 오류가 발생했습니다. 잠시 후 다시 시도해 주세요.",
      signupPromptPrefix: "아직 계정이 없다면",
      signupLinkText: "회원가입",
      signupPromptSuffix: "을 진행해 주세요.",
    },
    signup: {
      title: "회원가입",
      description: "새 계정을 생성한 뒤 프로젝트를 저장하고 관리할 수 있습니다.",
      emailLabel: "이메일",
      passwordLabel: "비밀번호",
      passwordConfirmLabel: "비밀번호 확인",
      submitIdle: "회원가입",
      submitLoading: "회원가입 중...",
      mismatchError: "비밀번호와 비밀번호 확인이 일치하지 않습니다.",
      signupFailedFallbackError: "회원가입에 실패했습니다. 다시 시도해 주세요.",
      errorNetwork: "네트워크 오류가 발생했습니다. 잠시 후 다시 시도해 주세요.",
      passwordStrengthPrefix: "비밀번호 난이도:",
      passwordStrengthWeak: "약함",
      passwordStrengthMedium: "보통",
      passwordStrengthStrong: "강함",
      loginPromptPrefix: "이미 계정이 있다면",
      loginLinkText: "로그인",
      loginPromptSuffix: "으로 이동해 주세요.",
    },
  },
};

export function getAuthMessages(locale: AppLocale | null | undefined): AuthMessages {
  const key = (locale ?? DEFAULT_LOCALE) as AppLocale;
  return AUTH_MESSAGES[key] ?? AUTH_MESSAGES[DEFAULT_LOCALE];
}