function chipClass(status) {
  if (status === "ok") return "good";
  if (status === "failed" || status === "lost" || status === "killed") return "bad";
  if (status === "running" || status === "busy" || status === "starting") return "warn";
  return "muted";
}

function when(ts) {
  if (!ts) return "";
  return new Date(ts * 1000).toLocaleTimeString([], { hour: "2-digit", minute: "2-digit" });
}

function summary(jobs) {
  const running = jobs.filter((j) => ["running", "busy", "starting"].includes(j.status)).length;
  const failed = jobs.filter((j) => ["failed", "lost", "killed"].includes(j.status)).length;
  const parts = [];
  if (running) parts.push(`${running} running`);
  if (failed) parts.push(`${failed} failed`);
  if (!parts.length) parts.push(jobs.length ? `${jobs.length} recent` : "idle");
  return parts.join(" · ");
}

export default {
  title: "Build VM",
  interval: 5,

  mount(el) {
    el.innerHTML = `<div class="sbb-summary muted"></div><div class="sbb-list"></div>`;
  },

  update(state, el) {
    const sum = el.querySelector(".sbb-summary");
    const list = el.querySelector(".sbb-list");
    if (state.offline) {
      sum.textContent = "";
      list.textContent = "build VM unreachable";
      return;
    }
    const jobs = state.jobs ?? [];
    sum.textContent = summary(jobs);
    list.textContent = "";
    for (const job of jobs.slice(0, 8)) {
      const row = document.createElement("div");
      row.className = "row job";
      const kind = document.createElement("span");
      kind.className = "kind";
      kind.textContent = job.kind || "job";
      const time = document.createElement("span");
      time.className = "muted num";
      time.textContent = when(job.created);
      const status = document.createElement("span");
      status.className = chipClass(job.status);
      status.textContent = job.status;
      row.append(kind, time, status);
      list.append(row);
    }
  },
};