export interface SlashCommandResult {
  consumed: boolean;
  inputToExecute?: string;
  systemMessage?: string;
}

export function handleSlashCommand(input: string): SlashCommandResult {
  const raw = String(input || "").trim();
  if (!raw.startsWith("/")) return { consumed: false };

  const cmd = raw.toLowerCase();
  if (cmd === "/help") {
    return {
      consumed: true,
      systemMessage: "Commands: /help, /doctor, /status, /config, /logs, /replay latest, /ai <intent>"
    };
  }
  if (cmd === "/doctor") return { consumed: true, inputToExecute: "doctor" };
  if (cmd === "/status") return { consumed: true, inputToExecute: "status" };
  if (cmd === "/config") return { consumed: true, inputToExecute: "config" };
  if (cmd === "/logs") return { consumed: true, inputToExecute: "logs limit 20" };
  if (cmd === "/why") return { consumed: true, inputToExecute: "__why__" };
  if (cmd.startsWith("/replay")) {
    const rest = raw.replace(/^\/replay/i, "").trim();
    return { consumed: true, inputToExecute: `replay ${rest || "latest"}` };
  }
  if (cmd.startsWith("/ai ")) {
    const rest = raw.slice(4).trim();
    return { consumed: true, inputToExecute: `/ai ${rest}` };
  }

  return {
    consumed: true,
    systemMessage: `Unknown slash command: ${raw}. Try /help`
  };
}