function xmlEscape(value: string): string {
  return value
    .replace(/&/g, "&")
    .replace(/</g, "&lt;")
    .replace(/>/g, "&gt;")
    .replace(/"/g, "&quot;")
    .replace(/'/g, "&apos;");
}

const STRATEGY_VALUES: Record<string, string> = {
  LONGEST_IDLE_AGENT: "longest-idle-agent",
  ROUND_ROBIN: "round-robin",
  TOP_DOWN: "top-down",
  AGENT_WITH_LEAST_TALK_TIME: "agent-with-least-talk-time",
  AGENT_WITH_FEWEST_CALLS: "agent-with-fewest-calls",
  SEQUENTIALLY_BY_AGENT_ORDER: "sequentially-by-agent-order",
  RING_ALL: "ring-all",
  RING_PROGRESSIVELY: "ring-progressively",
};

export interface QueueXmlParams {
  queueName: string; // ja no formato "<id>@<domain>"
  strategy: keyof typeof STRATEGY_VALUES;
  mohSound?: string;
  announceSound?: string;
  announceFrequency: number;
  maxWaitTime: number;
  maxWaitTimeWithNoAgent: number;
  agentNoAnswerStatus?: string;
  tierRulesApply: boolean;
  tierRuleWaitSecond: number;
  discardAbandonedAfter: number;
  abandonedResumeAllowed: boolean;
  skipAgentsWithExternalCalls: boolean;
  recordingEnabled: boolean;
}

/**
 * XML de fila do mod_callcenter (agente.md secao 50-51). Escrito em
 * autoload_configs/callcenter_queues.conf.d/<queue_id>.xml (volume Docker
 * compartilhado, incluído via X-PRE-PROCESS no callcenter.conf.xml —
 * mesmo padrão dos gateways Sofia). Carregado com `callcenter_config queue
 * reload <nome>` via ESL, não é resolvido dinamicamente por chamada como o
 * dialplan.
 */
export function buildQueueXml(params: QueueXmlParams): string {
  const lines: string[] = [];
  const param = (name: string, value: string | number | boolean | undefined) => {
    if (value === undefined || value === "") return;
    lines.push(`      <param name="${name}" value="${xmlEscape(String(value))}"/>`);
  };

  param("strategy", STRATEGY_VALUES[params.strategy]);
  param("moh-sound", params.mohSound);
  param("announce-sound", params.announceSound);
  param("announce-frequency", params.announceFrequency);
  param("time-base-score", "system");
  param("max-wait-time", params.maxWaitTime);
  param("max-wait-time-with-no-agent", params.maxWaitTimeWithNoAgent);
  param("agent-no-answer-status", params.agentNoAnswerStatus);
  param("tier-rules-apply", params.tierRulesApply);
  param("tier-rule-wait-second", params.tierRuleWaitSecond);
  param("discard-abandoned-after", params.discardAbandonedAfter);
  param("abandoned-resume-allowed", params.abandonedResumeAllowed);
  param("skip-agents-with-external-calls", params.skipAgentsWithExternalCalls);
  if (params.recordingEnabled) {
    param(
      "record-template",
      "$${recordings_dir}/${strftime(%Y-%m-%d-%H-%M-%S)}.${destination_number}.${caller_id_number}.${uuid}.wav",
    );
  }

  return `<include>
  <queue name="${xmlEscape(params.queueName)}">
${lines.join("\n")}
  </queue>
</include>`;
}