export function shorten(text, max = 90) {
  if (!text || typeof text !== "string") return text;
  return text.length > max ? `${text.slice(0, max - 3)}...` : text;
}

export function createReleaseLogger(logUi = () => {}) {
  let lines = [];
  let lastMessage = null;
  const state = { el: null };

  function render() {
    if (state.el) {
      state.el.textContent = lines.join("\n");
      state.el.scrollTop = 0;
    }
  }

  function log(msg) {
    if (!msg) return;
    const plain = msg.trim();
    if (plain === lastMessage) return;
    lastMessage = plain;
    const ts = new Date().toLocaleTimeString();
    const line = `${ts}  ${msg}`;
    lines.unshift(line);
    lines = lines.slice(0, 120);
    render();
    const lvl = msg.toLowerCase().startsWith("error") ? "error" : "info";
    logUi(`Update: ${msg}`, lvl);
  }

  function attach(el) {
    state.el = el;
    render();
  }

  return { log, attach, getLines: () => lines.slice() };
}