// Address sets, and dynamic sets' entries.
import { h, mount, table, modal, errorBox, field, input, checkbox, confirmDialog, badge, toast } from "../ui.js";
import { get, api, change, can } from "../api.js";
import { rerender } from "../app.js";
import { listEditor, fmtSeconds, parseSeconds, rowClass } from "../widgets.js";

export async function render(el) {
  const sets = await get("/sets");
  const write = can("config", true);
  mount(el,
    h("div", { class: "page-head" },
      h("div", { class: "grow" }, h("h1", null, "Address sets"), h("div", { class: "muted" }, "Named lists of IPv4 and IPv6 addresses, prefixes and ranges, mixed. A dynamic set takes entries at run time, each with a timeout (a captive portal's signed-in clients).")),
      write ? h("div", { class: "actions" }, h("button", { class: "primary", onclick: () => setDialog(null) }, "Add set")) : null),
    h("div", { class: "panel" }, table([
      { label: "Name", render: (s) => h("strong", null, s.name) },
      { label: "Entries", render: (s) => s.dynamic ? [badge("dynamic", "accent"), s.timeout ? " timeout " + fmtSeconds(s.timeout) : "", " ",
        s.pending ? null : h("button", { class: "small", onclick: () => entries(s) }, "Entries…")] : h("span", { class: "mono small" }, s.entries.join(", ")) },
      { label: "Comment", render: (s) => s.comment },
      write ? { label: "", tdClass: "actions-cell", render: (s) => s.pending === "deleted" ? badge("deleted", "err") : [
        h("button", { class: "small reveal", onclick: () => setDialog(s) }, "Edit"), " ",
        h("button", { class: "small reveal", onclick: () => del(s) }, "Delete")] } : null,
    ].filter(Boolean), sets, { empty: "No sets yet.", rowClass })));
}

async function del(s) {
  if (!await confirmDialog("Delete set", "Delete set " + s.name + "?", "Delete", "danger")) return;
  try { await change("DELETE", "/sets/" + s.id); rerender(); } catch (e) { modal("Not deleted", errorBox(e)); }
}

async function setDialog(s) {
  s = s || { entries: [] };
  const name = input({ value: s.name || "", placeholder: "trusted" });
  const list = listEditor(s.entries, { placeholder: "192.168.1.0/24, 2001:db8:1::/64, 192.168.1.100-192.168.1.199", addLabel: "Add entry" });
  const dynamic = checkbox("dynamic: entries are added at run time (the Entries button, hc set entries, a program with a token), each for a time", s.dynamic);
  // A dynamic set has no configured entries; only it has a timeout.
  const entryFields = field("Entries", list).filter(Boolean);
  const timeoutFields = field("Entry timeout", timeout, "How long an entry stays unless it is added with its own. Empty: until removed (or a reboot).").filter(Boolean);
  const showKind = () => {
    for (const n of entryFields) n.classList.toggle("hidden", dynamic.input.checked);
    for (const n of timeoutFields) n.classList.toggle("hidden", !dynamic.input.checked);
  };
  dynamic.input.addEventListener("change", showKind);
  showKind();
  const timeout = input({ value: s.timeout ? fmtSeconds(s.timeout) : "", placeholder: "1h, 1d (none: until removed)", class: "short" });
  const comment = input({ value: s.comment || "" });
  const err = h("div");
  await modal(s.id ? "Edit set " + s.name : "Add set", h("div", null, h("div", { class: "form-grid" },
    field("Name", name), ...entryFields, h("label"), dynamic, ...timeoutFields, field("Comment", comment)), err), [
    { label: "Cancel", value: null },
    { label: s.id ? "Save" : "Add set", kind: "primary", onclick: async () => {
      mount(err);
      const t = parseSeconds(timeout.value);
      if (t === null) { mount(err, h("div", { class: "msg err" }, "Write the timeout as 1h, 30m or 1d.")); return false; }
      try {
        await change(s.id ? "PATCH" : "POST", s.id ? "/sets/" + s.id : "/sets", { name: name.value.trim(), entries: dynamic.input.checked ? [] : list.value(), dynamic: dynamic.input.checked,
          timeout: dynamic.input.checked ? t : 0, comment: comment.value.trim() });
        rerender();
        return true;
      } catch (e) { mount(err, errorBox(e)); return false; }
    } },
  ], { wide: true, sticky: true });
}

// entries shows and changes a dynamic set's entries.
async function entries(s) {
  const body = h("div");
  const write = can("sets", true);
  const draw = async () => {
    const es = await get("/sets/" + encodeURIComponent(s.name) + "/elements");
    const addr = input({ placeholder: "192.168.1.50 or 2001:db8:1::50", class: "mono" });
    const t = input({ placeholder: s.timeout ? fmtSeconds(s.timeout) : "none", class: "short" });
    mount(body,
      table([
        { label: "Address", render: (e) => h("span", { class: "mono" }, e.address) },
        { label: "Expires in", render: (e) => e.timeout ? fmtSeconds(e.timeout) : "never" },
        write ? { label: "", render: (e) => h("button", { class: "small", onclick: async () => {
          try { await api("DELETE", "/sets/" + encodeURIComponent(s.name) + "/elements/" + encodeURIComponent(e.address)); draw(); } catch (x) { toast(x.message, "err"); }
        } }, "Remove") } : null,
      ].filter(Boolean), es, { empty: "No entries." }),
      write ? h("div", { class: "filter-row" }, addr, t, h("button", { class: "primary small", onclick: async () => {
        const secs = parseSeconds(t.value);
        if (secs === null) { toast("Write the timeout as 1h, 30m or 1d", "err"); return; }
        try { await api("POST", "/sets/" + encodeURIComponent(s.name) + "/elements", { body: { address: addr.value.trim(), timeout: secs } }); draw(); } catch (x) { toast(x.message, "err"); }
      } }, "Add")) : null);
  };
  await draw();
  await modal("Entries of " + s.name, body, [{ label: "Close", value: null }], { wide: true });
}