export function formatInt(n: number): string {
  return new Intl.NumberFormat("pt-BR").format(Math.round(n));
}

/** mm:ss a partir de segundos — usado por TME/TMA (agente.md secao 162). */
export function formatDuration(seconds: number): string {
  const total = Math.round(seconds);
  const mm = Math.floor(total / 60);
  const ss = total % 60;
  return `${mm}:${String(ss).padStart(2, "0")}`;
}

export function formatPercent(ratio: number): string {
  return new Intl.NumberFormat("pt-BR", { style: "percent", maximumFractionDigits: 1 }).format(ratio);
}

export function formatBytes(bytes: number): { value: string; unit: string } {
  if (bytes === 0) return { value: "0", unit: "B" };
  const units = ["B", "KB", "MB", "GB", "TB"];
  const exp = Math.min(Math.floor(Math.log(bytes) / Math.log(1000)), units.length - 1);
  const value = bytes / 1000 ** exp;
  return { value: value.toFixed(exp === 0 ? 0 : 1), unit: units[exp] };
}

export const AI_USAGE_LABELS: Record<string, string> = {
  AI_TRANSCRIPTION_SECONDS: "Transcrição (s)",
  AI_ANALYSIS_REQUEST: "Análises",
  AI_INPUT_TOKENS: "Tokens de entrada",
  AI_OUTPUT_TOKENS: "Tokens de saída",
};

export function formatCurrency(value: number, currency = "BRL"): string {
  return new Intl.NumberFormat("pt-BR", { style: "currency", currency, maximumFractionDigits: 6 }).format(value);
}

export function formatDate(iso: string): string {
  return new Intl.DateTimeFormat("pt-BR", { day: "2-digit", month: "short", year: "numeric" }).format(new Date(iso));
}

export function formatDateTime(iso: string): string {
  return new Intl.DateTimeFormat("pt-BR", {
    day: "2-digit",
    month: "short",
    year: "numeric",
    hour: "2-digit",
    minute: "2-digit",
  }).format(new Date(iso));
}

/** agente.md secao 128 — catálogo de preço, mesma nomenclatura do
 * `PriceItemType` do backend (packages/database/prisma/schema.prisma). */
export const PRICE_ITEM_TYPE_LABELS: Record<string, string> = {
  BASE_SUBSCRIPTION: "Assinatura base",
  EXTENSION_MONTH: "Ramal / mês",
  AGENT_MONTH: "Agente / mês",
  TRUNK_MONTH: "Tronco / mês",
  CALL: "Chamada (fixo)",
  CALL_MINUTE: "Minuto de chamada (padrão)",
  FIXED_MINUTE: "Minuto — fixo",
  MOBILE_MINUTE: "Minuto — móvel",
  INTERNATIONAL_MINUTE: "Minuto — internacional",
  AI_TRANSCRIPTION_MINUTE: "IA — transcrição / minuto",
  AI_ANALYSIS_CALL: "IA — análise / chamada",
  AI_INPUT_TOKEN: "IA — token de entrada",
  AI_OUTPUT_TOKEN: "IA — token de saída",
  RECORDING_GB_MONTH: "Armazenamento / GB / mês",
};

export const PRICE_ITEM_TYPES = Object.keys(PRICE_ITEM_TYPE_LABELS) as Array<keyof typeof PRICE_ITEM_TYPE_LABELS>;

/** agente.md secao 129 — tipos de destino de um RateDeckEntry. */
export const DESTINATION_TYPE_LABELS: Record<string, string> = {
  FIXED: "Fixo",
  MOBILE: "Móvel",
  INTERNATIONAL: "Internacional",
};

export const DESTINATION_TYPES = Object.keys(DESTINATION_TYPE_LABELS) as Array<keyof typeof DESTINATION_TYPE_LABELS>;