// The web UI's certificate: obtained through Jarl (tls.acme), its state,
// the last check, and buttons to test and renew.
import { h, mount, table, time, fmtTime, badge, errorBox, toast } from "../ui.js";
import { get, api } from "../api.js";
import { onLeave, rerender } from "../app.js";

const stateBadge = {
  ok: ["valid", "ok"], working: ["working…", "accent"], error: ["failing", "err"], none: ["none yet", ""],
};

export async function render(el) {
  const r = await get("/certificate");
  if (r.source !== "acme") {
    mount(el, h("div", { class: "page-head" }, h("div", { class: "grow" }, h("h1", null, "Certificate"))),
      h("div", { class: "panel" },
        r.source === "file"
          ? h("p", null, "The web UI uses the certificate in tls.cert_file, which you renew yourself.")
          : h("p", null, "The web UI is plain HTTP. Housecarl can get its own certificate from Let's Encrypt, with Jarl publishing the challenge: set tls.acme and jarl in housecarl.yaml (see docs/certificates.md)."),
      ));
    return;
  }
  const st = r.status;
  const out = h("div");
  const checkBox = h("div");
  const busy = st.state === "working";
  const testBtn = h("button", { disabled: busy, onclick: async () => {
    testBtn.disabled = true;
    mount(checkBox, h("div", { class: "msg info" }, h("span", { class: "spinner" }), "Checking: writing a test record through Jarl and waiting until it is seen (up to a few minutes)…"));
    try {
      const c = await api("POST", "/certificate/check");
      mount(checkBox, checkView(c));
    } catch (e) { mount(checkBox, errorBox(e)); }
    testBtn.disabled = false;
  } }, "Test");
  const renewBtn = h("button", { class: "primary", disabled: busy, onclick: async () => {
    try {
      await api("POST", "/certificate/renew");
      toast("Getting a new certificate…");
      setTimeout(rerender, 1500);
    } catch (e) { toast(e.message, "err", 8000); }
  } }, st.not_after ? "Renew now" : "Get the certificate now");
  const [label, kind] = stateBadge[st.state] || [st.state, ""];
  mount(out,
    h("div", { class: "panel" },
      h("dl", { class: "kv" },
        h("dt", null, "Name"), h("dd", null, h("strong", null, st.domain), " ", badge(label, kind)),
        h("dt", null, "From"), h("dd", null, st.staging ? ["Let's Encrypt staging ", badge("not trusted by browsers", "warn")] : st.directory),
        st.not_after ? [h("dt", null, "Valid until"), h("dd", null, fmtTime(st.not_after), " (", days(st.not_after), "), issued by ", st.issuer)] : null,
        st.renew_at ? [h("dt", null, "Renews"), h("dd", null, fmtTime(st.renew_at))] : null,
        st.last_attempt ? [h("dt", null, "Last attempt"), h("dd", null, time(st.last_attempt))] : null,
        st.next_attempt && !busy ? [h("dt", null, "Next check"), h("dd", null, time(st.next_attempt))] : null),
      st.last_error ? h("div", { class: "msg err" }, st.last_error) : null,
      st.staging && st.state === "ok" ? h("div", { class: "msg warn" }, "This certificate is from Let's Encrypt's staging service, to prove everything works. Browsers warn about it. Set tls.acme.directory: letsencrypt in housecarl.yaml and restart housecarld for a trusted one.") : null,
      h("div", { class: "actions mt" }, testBtn, renewBtn,
        h("span", { class: "muted small" }, "Test runs the check without asking Let's Encrypt; a certificate order always runs it first."))),
    checkBox);
  if (st.check) mount(checkBox, checkView(st.check));
  mount(el, h("div", { class: "page-head" }, h("div", { class: "grow" }, h("h1", null, "Certificate"),
    h("div", { class: "muted" }, "The web UI's certificate, obtained from the CA with Jarl publishing the DNS-01 challenge."))), out);
  if (busy) {
    const t = setTimeout(rerender, 3000);
    onLeave(() => clearTimeout(t));
  }
}

// days says how long until a time: "in 89 days", "in 5 hours".
function days(iso) {
  const ms = new Date(iso) - Date.now();
  if (ms <= 0) return "ended";
  const d = Math.floor(ms / 86400000);
  return d >= 2 ? "in " + d + " days" : "in " + Math.max(1, Math.round(ms / 3600000)) + " hours";
}

function checkView(c) {
  const mark = { ok: ["ok", "ok"], fail: ["failed", "err"], warn: ["warning", "warn"], skip: ["skipped", ""] };
  return h("div", { class: "panel" },
    h("h2", null, "Check, ", time(c.time), " ", c.ok ? badge("passed", "ok") : badge("failed", "err")),
    table([
      { label: "Step", render: (s) => h("strong", null, s.name) },
      { label: "", render: (s) => badge(...(mark[s.status] || [s.status, ""])) },
      { label: "What happened", render: (s) => [s.detail,
        (s.queries || []).length ? h("details", { class: "small", open: s.status === "fail" },
          h("summary", null, "DNS questions (" + s.queries.length + ")"),
          h("pre", { class: "wrap" }, s.queries.join("\n"))) : null] },
    ], c.steps));
}