const I18N_AVAILABLE = ["en", "de", "pl", "ru", "fr", "es", "pt"];
const I18N_NAMES = {
  en: "English", de: "Deutsch", pl: "Polski", ru: "Русский",
  fr: "Français", es: "Español", pt: "Português"
};

const I18N_DATA = {
  en: {
    login_title: "Sign in",
    username: "Username", password: "Password", sign_in: "Sign in",
    invalid_credentials: "Invalid username or password",
    logout: "Logout", settings: "Settings", language: "Language",
    competitions: "Competitions", new_competition: "New competition",
    competition_name: "Competition name", create: "Create", cancel: "Cancel",
    role: "Role", system_admin: "System Admin", chief_scorer: "Chief Scorer", scorer: "Scorer",
    pilots: "Pilots", penalties: "Penalties", members: "Members", rules: "Rules",
    settings_tab: "Settings",
    number: "Number", last_name: "Last name", first_name: "First name",
    country: "Country", balloon_id: "Balloon ID",
    add_pilot: "Add pilot", import_csv: "Import CSV", export_csv: "Export CSV",
    flight: "Flight", date: "Date", pilot_number: "Pilot No.",
    pilot_name: "Pilot name", rule: "Rule", task: "Task",
    penalty_values: "Penalties", description: "Description", created_by: "Created by",
    transferred: "Transferred", actions: "Actions",
    add_penalty: "Add penalty", edit: "Edit", delete: "Delete", save: "Save",
    confirm_delete: "Delete this entry?", search_rule: "Search rule by number or text",
    suggested_penalty: "Suggested penalty",
    escalation: "Escalation behavior",
    escalation_same: "Stays the same", escalation_doubled: "Doubled each time",
    escalation_escalate: "Escalates: ",
    add_member: "Add member", remove: "Remove",
    add_user: "Add user", users: "Users",
    display_name: "Display name", is_admin: "Admin",
    allow_any_scorer_edit: "Allow any scorer to edit penalties",
    open: "Open", back: "Back", change_password: "Change password",
    new_password: "New password", csv_paste: "Paste CSV (number,last,first,country,balloon)",
    no_pilots: "No pilots yet", no_penalties: "No penalties yet",
    no_members: "No members yet", no_competitions: "No competitions",
    select_pilot: "Select pilot", rule_number_short: "Rule No.",
    transferred_only: "Only untransferred",
    showing_n_of_m: "Showing {n} of {m}",
    online: "Online", offline: "Offline",
    forbidden: "Not allowed",
    save_settings: "Save settings",
    saved: "Saved",
    yes: "Yes", no: "No",
    backend_url: "Backend URL",
    backend_url_hint: "Leave empty to use the same origin (e.g. http://192.168.0.10:8080)",
    profile: "Profile",
    current_password: "Current password",
    leave_blank_keep: "Leave blank to keep current",
    username_taken: "Username already taken",
    prior_penalties: "Prior penalties for this pilot and rule",
    none: "None",
    applied: "Applied",
    apply_by_task: "Apply by task",
    apply_by_task_explain: "Confirm all open penalties for a task at once. Penalties are only marked applied after confirmation.",
    apply_n_open: "Apply {n} open",
    confirm_apply_task: "Mark all {n} open penalties for task '{task}' as applied?",
    summary: "Summary",
    penalty_summary: "Penalty summary",
    rule: "Rule",
    rule_not_found: "rule not found",
    close: "Close",
    count: "#",
    count_hint: "Number of prior penalties for this pilot and rule",
    prior_count: "Prior count (this pilot & rule)",
    search_penalties: "Search penalties…",
    filter_all: "All",
    filter_open: "Open only",
    filter_applied: "Applied only",
    total: "Total", open: "Open",
    repeat_password: "Repeat password",
    password_too_short: "Password must be at least 6 characters",
    passwords_dont_match: "Passwords do not match",
    too_many_attempts: "Too many login attempts — please wait a few minutes",
    profile_username_readonly: "Username can only be changed by a system administrator",
    profile_displayname_readonly: "Display name can only be changed by a system administrator",
    must_change_password: "Must change password",
    confirm_force_password: "Force this user to change their password on next request?",
    force_password_change: "Force password change",
    force_password_explain: "An administrator has required you to set a new password before you can continue.",
    user_not_found: "User not found",
    show_incidents: "Show incidents",
    hide_incidents: "Hide incidents",
    apply_select_task: "Pick a task to start applying its open penalties.",
    no_open_penalties: "No open penalties to apply.",
    no_task: "(no task)",
    start_apply: "Start",
    step_x_of_y: "Pilot {x} of {y}",
    pilot: "Pilot",
    next: "Next",
    to_overview: "To overview",
    apply_overview: "Overview",
    apply_overview_explain: "{n} penalty/penalties will be marked applied on save.",
    nothing_to_apply: "Nothing to apply.",
    confirm_save_partial: "Save and apply {n} penalty/penalties reviewed so far?",
  },
  de: {
    login_title: "Anmelden",
    username: "Benutzername", password: "Passwort", sign_in: "Anmelden",
    invalid_credentials: "Falscher Benutzername oder Passwort",
    logout: "Abmelden", settings: "Einstellungen", language: "Sprache",
    competitions: "Wettbewerbe", new_competition: "Neuer Wettbewerb",
    competition_name: "Wettbewerbsname", create: "Erstellen", cancel: "Abbrechen",
    role: "Rolle", system_admin: "Systemadmin", chief_scorer: "Chief-Scorer", scorer: "Scorer",
    pilots: "Piloten", penalties: "Strafen", members: "Mitglieder", rules: "Regeln",
    settings_tab: "Einstellungen",
    number: "Nummer", last_name: "Nachname", first_name: "Vorname",
    country: "Land", balloon_id: "Ballon-Kennung",
    add_pilot: "Pilot hinzufügen", import_csv: "CSV importieren", export_csv: "CSV exportieren",
    flight: "Fahrt", date: "Datum", pilot_number: "Pilot-Nr.",
    pilot_name: "Pilotenname", rule: "Regel", task: "Aufgabe",
    penalty_values: "Strafen", description: "Beschreibung", created_by: "Angelegt von",
    transferred: "Übertragen", actions: "Aktionen",
    add_penalty: "Strafe hinzufügen", edit: "Bearbeiten", delete: "Löschen", save: "Speichern",
    confirm_delete: "Eintrag löschen?", search_rule: "Regel nach Nummer oder Text suchen",
    suggested_penalty: "Vorgeschlagene Strafe",
    escalation: "Verhalten bei Wiederholung",
    escalation_same: "Bleibt gleich", escalation_doubled: "Wird jedes Mal verdoppelt",
    escalation_escalate: "Höherstufung: ",
    add_member: "Mitglied hinzufügen", remove: "Entfernen",
    add_user: "Benutzer anlegen", users: "Benutzer",
    display_name: "Anzeigename", is_admin: "Admin",
    allow_any_scorer_edit: "Alle Scorer dürfen Strafen bearbeiten",
    open: "Öffnen", back: "Zurück", change_password: "Passwort ändern",
    new_password: "Neues Passwort", csv_paste: "CSV einfügen (Nr,Nachname,Vorname,Land,Ballon)",
    no_pilots: "Noch keine Piloten", no_penalties: "Noch keine Strafen",
    no_members: "Noch keine Mitglieder", no_competitions: "Keine Wettbewerbe",
    select_pilot: "Pilot wählen", rule_number_short: "Regel-Nr.",
    transferred_only: "Nur nicht übertragene",
    showing_n_of_m: "{n} von {m}",
    online: "Online", offline: "Offline",
    forbidden: "Keine Berechtigung",
    save_settings: "Einstellungen speichern",
    saved: "Gespeichert",
    yes: "Ja", no: "Nein",
    backend_url: "Backend-URL",
    backend_url_hint: "Leer lassen für gleichen Ursprung (z.B. http://192.168.0.10:8080)",
    profile: "Profil",
    current_password: "Aktuelles Passwort",
    leave_blank_keep: "Leer lassen um beizubehalten",
    username_taken: "Benutzername bereits vergeben",
    prior_penalties: "Frühere Strafen für diesen Piloten und diese Regel",
    none: "Keine",
    applied: "Angewendet",
    apply_by_task: "Pro Task anwenden",
    apply_by_task_explain: "Bestätige alle offenen Strafen einer Aufgabe gemeinsam. Erst nach Bestätigung gelten die Strafen als angewendet.",
    apply_n_open: "{n} offene anwenden",
    confirm_apply_task: "Alle {n} offenen Strafen der Aufgabe '{task}' als angewendet markieren?",
    summary: "Übersicht",
    penalty_summary: "Strafen-Übersicht",
    rule: "Regel",
    rule_not_found: "Regel nicht gefunden",
    close: "Schließen",
    count: "#",
    count_hint: "Anzahl früherer Strafen für diesen Piloten und diese Regel",
    prior_count: "Frühere Anzahl (dieser Pilot & Regel)",
    search_penalties: "Strafen durchsuchen…",
    filter_all: "Alle",
    filter_open: "Nur offene",
    filter_applied: "Nur angewendete",
    total: "Gesamt", open: "Offen",
    repeat_password: "Passwort wiederholen",
    password_too_short: "Passwort muss mindestens 6 Zeichen lang sein",
    passwords_dont_match: "Passwörter stimmen nicht überein",
    too_many_attempts: "Zu viele Anmeldeversuche — bitte ein paar Minuten warten",
    profile_username_readonly: "Der Benutzername kann nur vom Systemadministrator geändert werden",
    profile_displayname_readonly: "Der Anzeigename kann nur vom Systemadministrator geändert werden",
    must_change_password: "Passwortwechsel erforderlich",
    confirm_force_password: "Diesen Benutzer beim nächsten Zugriff zum Passwortwechsel zwingen?",
    force_password_change: "Passwortwechsel erzwingen",
    force_password_explain: "Ein Administrator hat festgelegt, dass du ein neues Passwort vergeben musst, bevor du fortfahren kannst.",
    user_not_found: "Benutzer nicht gefunden",
    show_incidents: "Vorfälle anzeigen",
    hide_incidents: "Vorfälle ausblenden",
    apply_select_task: "Aufgabe wählen, deren offene Strafen angewendet werden sollen.",
    no_open_penalties: "Keine offenen Strafen zum Anwenden.",
    no_task: "(ohne Aufgabe)",
    start_apply: "Start",
    step_x_of_y: "Pilot {x} von {y}",
    pilot: "Pilot",
    next: "Weiter",
    to_overview: "Zur Übersicht",
    apply_overview: "Übersicht",
    apply_overview_explain: "Beim Speichern werden {n} Strafe(n) als angewendet markiert.",
    nothing_to_apply: "Nichts anzuwenden.",
    confirm_save_partial: "{n} bisher überprüfte Strafe(n) jetzt speichern und anwenden?",
  },
  pl: {
    login_title: "Zaloguj się",
    username: "Nazwa użytkownika", password: "Hasło", sign_in: "Zaloguj",
    invalid_credentials: "Nieprawidłowy login lub hasło",
    logout: "Wyloguj", settings: "Ustawienia", language: "Język",
    competitions: "Zawody", new_competition: "Nowe zawody",
    competition_name: "Nazwa zawodów", create: "Utwórz", cancel: "Anuluj",
    role: "Rola", system_admin: "Administrator", chief_scorer: "Chief-Scorer", scorer: "Scorer",
    pilots: "Piloci", penalties: "Kary", members: "Członkowie", rules: "Zasady",
    settings_tab: "Ustawienia",
    number: "Numer", last_name: "Nazwisko", first_name: "Imię",
    country: "Kraj", balloon_id: "Oznaczenie balonu",
    add_pilot: "Dodaj pilota", import_csv: "Import CSV", export_csv: "Eksport CSV",
    flight: "Lot", date: "Data", pilot_number: "Nr pilota",
    pilot_name: "Imię i nazwisko", rule: "Zasada", task: "Zadanie",
    penalty_values: "Kary", description: "Opis", created_by: "Wprowadził",
    transferred: "Przesłano", actions: "Akcje",
    add_penalty: "Dodaj karę", edit: "Edytuj", delete: "Usuń", save: "Zapisz",
    confirm_delete: "Usunąć ten wpis?", search_rule: "Szukaj zasady po numerze lub tekście",
    suggested_penalty: "Sugerowana kara",
    escalation: "Zachowanie przy powtórzeniu",
    escalation_same: "Bez zmian", escalation_doubled: "Podwajana za każdym razem",
    escalation_escalate: "Eskalacja: ",
    add_member: "Dodaj członka", remove: "Usuń",
    add_user: "Dodaj użytkownika", users: "Użytkownicy",
    display_name: "Wyświetlana nazwa", is_admin: "Admin",
    allow_any_scorer_edit: "Pozwól dowolnemu scorerowi edytować kary",
    open: "Otwórz", back: "Wstecz", change_password: "Zmień hasło",
    new_password: "Nowe hasło", csv_paste: "Wklej CSV (nr,nazwisko,imię,kraj,balon)",
    no_pilots: "Brak pilotów", no_penalties: "Brak kar",
    no_members: "Brak członków", no_competitions: "Brak zawodów",
    select_pilot: "Wybierz pilota", rule_number_short: "Nr zasady",
    transferred_only: "Tylko nieprzesłane",
    showing_n_of_m: "{n} z {m}",
    online: "Online", offline: "Offline",
    forbidden: "Brak uprawnień",
    save_settings: "Zapisz ustawienia",
    saved: "Zapisano",
    yes: "Tak", no: "Nie",
  },
  ru: {
    login_title: "Вход",
    username: "Имя пользователя", password: "Пароль", sign_in: "Войти",
    invalid_credentials: "Неверное имя или пароль",
    logout: "Выйти", settings: "Настройки", language: "Язык",
    competitions: "Соревнования", new_competition: "Новое соревнование",
    competition_name: "Название", create: "Создать", cancel: "Отмена",
    role: "Роль", system_admin: "Администратор", chief_scorer: "Chief-Scorer", scorer: "Scorer",
    pilots: "Пилоты", penalties: "Штрафы", members: "Участники", rules: "Правила",
    settings_tab: "Настройки",
    number: "Номер", last_name: "Фамилия", first_name: "Имя",
    country: "Страна", balloon_id: "Регистрация шара",
    add_pilot: "Добавить пилота", import_csv: "Импорт CSV", export_csv: "Экспорт CSV",
    flight: "Полёт", date: "Дата", pilot_number: "№ пилота",
    pilot_name: "Имя пилота", rule: "Правило", task: "Задание",
    penalty_values: "Штрафы", description: "Описание", created_by: "Автор",
    transferred: "Передано", actions: "Действия",
    add_penalty: "Добавить штраф", edit: "Редактировать", delete: "Удалить", save: "Сохранить",
    confirm_delete: "Удалить запись?", search_rule: "Поиск правила по номеру или тексту",
    suggested_penalty: "Рекомендованный штраф",
    escalation: "Поведение при повторе",
    escalation_same: "Без изменений", escalation_doubled: "Удваивается каждый раз",
    escalation_escalate: "Эскалация: ",
    add_member: "Добавить участника", remove: "Удалить",
    add_user: "Создать пользователя", users: "Пользователи",
    display_name: "Отображаемое имя", is_admin: "Админ",
    allow_any_scorer_edit: "Любой Scorer может редактировать штрафы",
    open: "Открыть", back: "Назад", change_password: "Изменить пароль",
    new_password: "Новый пароль", csv_paste: "Вставьте CSV (№,фамилия,имя,страна,шар)",
    no_pilots: "Нет пилотов", no_penalties: "Нет штрафов",
    no_members: "Нет участников", no_competitions: "Нет соревнований",
    select_pilot: "Выберите пилота", rule_number_short: "№ правила",
    transferred_only: "Только непереданные",
    showing_n_of_m: "{n} из {m}",
    online: "Онлайн", offline: "Оффлайн",
    forbidden: "Нет доступа",
    save_settings: "Сохранить настройки",
    saved: "Сохранено",
    yes: "Да", no: "Нет",
  },
  fr: {
    login_title: "Connexion",
    username: "Nom d'utilisateur", password: "Mot de passe", sign_in: "Connexion",
    invalid_credentials: "Identifiants invalides",
    logout: "Déconnexion", settings: "Paramètres", language: "Langue",
    competitions: "Compétitions", new_competition: "Nouvelle compétition",
    competition_name: "Nom", create: "Créer", cancel: "Annuler",
    role: "Rôle", system_admin: "Administrateur", chief_scorer: "Chief-Scorer", scorer: "Scorer",
    pilots: "Pilotes", penalties: "Pénalités", members: "Membres", rules: "Règles",
    settings_tab: "Paramètres",
    number: "Numéro", last_name: "Nom", first_name: "Prénom",
    country: "Pays", balloon_id: "Immat. ballon",
    add_pilot: "Ajouter un pilote", import_csv: "Importer CSV", export_csv: "Exporter CSV",
    flight: "Vol", date: "Date", pilot_number: "N° pilote",
    pilot_name: "Nom du pilote", rule: "Règle", task: "Épreuve",
    penalty_values: "Pénalités", description: "Description", created_by: "Créé par",
    transferred: "Transféré", actions: "Actions",
    add_penalty: "Ajouter pénalité", edit: "Modifier", delete: "Supprimer", save: "Enregistrer",
    confirm_delete: "Supprimer cette entrée ?", search_rule: "Rechercher une règle par numéro ou texte",
    suggested_penalty: "Pénalité suggérée",
    escalation: "Comportement en cas de répétition",
    escalation_same: "Reste identique", escalation_doubled: "Doublée à chaque fois",
    escalation_escalate: "Escalade : ",
    add_member: "Ajouter membre", remove: "Retirer",
    add_user: "Créer un utilisateur", users: "Utilisateurs",
    display_name: "Nom affiché", is_admin: "Admin",
    allow_any_scorer_edit: "Tous les scorers peuvent modifier les pénalités",
    open: "Ouvrir", back: "Retour", change_password: "Changer le mot de passe",
    new_password: "Nouveau mot de passe", csv_paste: "Coller CSV (n°,nom,prénom,pays,ballon)",
    no_pilots: "Aucun pilote", no_penalties: "Aucune pénalité",
    no_members: "Aucun membre", no_competitions: "Aucune compétition",
    select_pilot: "Choisir un pilote", rule_number_short: "N° règle",
    transferred_only: "Non transférés uniquement",
    showing_n_of_m: "{n} sur {m}",
    online: "En ligne", offline: "Hors ligne",
    forbidden: "Non autorisé",
    save_settings: "Enregistrer",
    saved: "Enregistré",
    yes: "Oui", no: "Non",
  },
  es: {
    login_title: "Iniciar sesión",
    username: "Usuario", password: "Contraseña", sign_in: "Entrar",
    invalid_credentials: "Usuario o contraseña incorrectos",
    logout: "Salir", settings: "Ajustes", language: "Idioma",
    competitions: "Competiciones", new_competition: "Nueva competición",
    competition_name: "Nombre", create: "Crear", cancel: "Cancelar",
    role: "Rol", system_admin: "Administrador", chief_scorer: "Chief-Scorer", scorer: "Scorer",
    pilots: "Pilotos", penalties: "Penalizaciones", members: "Miembros", rules: "Reglas",
    settings_tab: "Ajustes",
    number: "Número", last_name: "Apellido", first_name: "Nombre",
    country: "País", balloon_id: "Matrícula globo",
    add_pilot: "Añadir piloto", import_csv: "Importar CSV", export_csv: "Exportar CSV",
    flight: "Vuelo", date: "Fecha", pilot_number: "N.º piloto",
    pilot_name: "Nombre piloto", rule: "Regla", task: "Tarea",
    penalty_values: "Penalizaciones", description: "Descripción", created_by: "Creado por",
    transferred: "Transferido", actions: "Acciones",
    add_penalty: "Añadir penalización", edit: "Editar", delete: "Eliminar", save: "Guardar",
    confirm_delete: "¿Eliminar este registro?", search_rule: "Buscar regla por número o texto",
    suggested_penalty: "Penalización sugerida",
    escalation: "Comportamiento al repetirse",
    escalation_same: "Sin cambios", escalation_doubled: "Se duplica cada vez",
    escalation_escalate: "Escala: ",
    add_member: "Añadir miembro", remove: "Quitar",
    add_user: "Crear usuario", users: "Usuarios",
    display_name: "Nombre mostrado", is_admin: "Admin",
    allow_any_scorer_edit: "Cualquier scorer puede editar penalizaciones",
    open: "Abrir", back: "Atrás", change_password: "Cambiar contraseña",
    new_password: "Nueva contraseña", csv_paste: "Pegar CSV (n.º,apellido,nombre,país,globo)",
    no_pilots: "Sin pilotos", no_penalties: "Sin penalizaciones",
    no_members: "Sin miembros", no_competitions: "Sin competiciones",
    select_pilot: "Elegir piloto", rule_number_short: "N.º regla",
    transferred_only: "Solo no transferidas",
    showing_n_of_m: "{n} de {m}",
    online: "En línea", offline: "Sin conexión",
    forbidden: "No permitido",
    save_settings: "Guardar ajustes",
    saved: "Guardado",
    yes: "Sí", no: "No",
  },
  pt: {
    login_title: "Entrar",
    username: "Utilizador", password: "Palavra-passe", sign_in: "Entrar",
    invalid_credentials: "Utilizador ou palavra-passe inválidos",
    logout: "Sair", settings: "Definições", language: "Idioma",
    competitions: "Competições", new_competition: "Nova competição",
    competition_name: "Nome", create: "Criar", cancel: "Cancelar",
    role: "Papel", system_admin: "Administrador", chief_scorer: "Chief-Scorer", scorer: "Scorer",
    pilots: "Pilotos", penalties: "Penalizações", members: "Membros", rules: "Regras",
    settings_tab: "Definições",
    number: "Número", last_name: "Apelido", first_name: "Nome",
    country: "País", balloon_id: "Matrícula balão",
    add_pilot: "Adicionar piloto", import_csv: "Importar CSV", export_csv: "Exportar CSV",
    flight: "Voo", date: "Data", pilot_number: "N.º piloto",
    pilot_name: "Nome do piloto", rule: "Regra", task: "Tarefa",
    penalty_values: "Penalizações", description: "Descrição", created_by: "Criado por",
    transferred: "Transferido", actions: "Ações",
    add_penalty: "Adicionar penalização", edit: "Editar", delete: "Eliminar", save: "Guardar",
    confirm_delete: "Eliminar este registo?", search_rule: "Procurar regra por número ou texto",
    suggested_penalty: "Penalização sugerida",
    escalation: "Comportamento em caso de repetição",
    escalation_same: "Sem alteração", escalation_doubled: "Duplicada de cada vez",
    escalation_escalate: "Escala: ",
    add_member: "Adicionar membro", remove: "Remover",
    add_user: "Criar utilizador", users: "Utilizadores",
    display_name: "Nome mostrado", is_admin: "Admin",
    allow_any_scorer_edit: "Qualquer scorer pode editar penalizações",
    open: "Abrir", back: "Voltar", change_password: "Alterar palavra-passe",
    new_password: "Nova palavra-passe", csv_paste: "Colar CSV (n.º,apelido,nome,país,balão)",
    no_pilots: "Sem pilotos", no_penalties: "Sem penalizações",
    no_members: "Sem membros", no_competitions: "Sem competições",
    select_pilot: "Escolher piloto", rule_number_short: "N.º regra",
    transferred_only: "Apenas não transferidas",
    showing_n_of_m: "{n} de {m}",
    online: "Online", offline: "Offline",
    forbidden: "Não autorizado",
    save_settings: "Guardar definições",
    saved: "Guardado",
    yes: "Sim", no: "Não",
  },
};

let CURRENT_LANG = "en";

function setLang(lang) {
  if (!I18N_DATA[lang]) lang = "en";
  CURRENT_LANG = lang;
  document.documentElement.lang = lang;
}

function t(key, vars) {
  const d = I18N_DATA[CURRENT_LANG] || I18N_DATA.en;
  let str = d[key] || I18N_DATA.en[key] || key;
  if (vars) {
    for (const k in vars) {
      str = str.replaceAll("{" + k + "}", vars[k]);
    }
  }
  return str;
}