// CR3D3NTIALS page entry (/credentials.html).
//
// Operator surface to provision per-agent credentials without editing the
// agent's config repo. One sub-tab and an agent picker:
//   GITHUB — single-account PAT paste against /api/github-account
//            (GET -> {present}, POST form-encoded {agent, token} ->
//            {ok:true}; error_response shape on failure).
//            No account name / homeserver / login mode, and no
//            live/heartbeat concept for a static PAT — just present/absent.
// Per-tab detail comments live next to their section below.

import { $, esc, renderServerWarnings } from "./common.js";
import { el } from "@hive/shared/dom.js";
import "@hive/shared/hive-tab-strip.js";
import { readApiError, problemMessage } from "@hive/shared/api-error.js";

let agents = [];

async function loadState() {
  try {
    const resp = await fetch("/api/state");
    if (!resp.ok) return;
    const s = await resp.json();
    renderServerWarnings(s.server_warnings);
    // `/api/state` exposes the live roster under `containers` (each entry an
    // object carrying `.name` + `.running`); there is no top-level `agents`
    // field, so the picker stays compatible with both string + object shapes.
    const containers = (s.containers || [])
      .map((a) => (typeof a === "string" ? { name: a } : a))
      .filter((c) => c && c.name);
    agents = containers.map((c) => c.name).sort();
  } catch {
    // best-effort: on a failed state read the picker renders empty
    // ("— no agents —") and the submit guard blocks until an agent is
    // selected, rather than guessing a roster.
  }
}

function renderAgentPicker() {
  const sel = $("ma-agent");
  sel.replaceChildren();
  if (!agents.length) {
    sel.append(el("option", { value: "" }, "— no agents —"));
    return;
  }
  sel.append(el("option", { value: "" }, "— select agent —"));
  for (const a of agents) sel.append(el("option", { value: a }, a));
}

// Shape-agnostic error-body parsing (shared by both tabs' submit handlers)
// lives in `@hive/shared/api-error.js` now — `readApiError` +
// `problemMessage` (this page only needs the one-line message, not the
// full `ApiErrorPanel`; its result lines are single-line `aria-live`
// regions, not a swap-in-a-panel context). Was a local function here
// originally; promoted so swarm-ui shares the same
// shape-agnostic reader instead of each side maintaining its own copy.

function clearSecrets(formEl) {
  formEl
    .querySelectorAll('input[type="password"], input[name="token"]')
    .forEach((i) => {
      i.value = "";
    });
}

// ─── GITHUB tab ─────────────────────────────────────────────────────────

async function loadGithubStatus(agent) {
  const status = $("gh-status");
  if (!agent) {
    status.replaceChildren(
      el(
        "p",
        { class: "meta" },
        "select an agent to see its github credential status.",
      ),
    );
    return;
  }
  status.replaceChildren(el("p", { class: "meta" }, "loading…"));
  let data;
  try {
    const resp = await fetch(
      "/api/github-account?agent=" + encodeURIComponent(agent),
    );
    if (!resp.ok) throw new Error("HTTP " + resp.status);
    data = await resp.json();
  } catch (err) {
    status.replaceChildren(
      el(
        "p",
        { class: "err" },
        "could not load status: " +
          esc(String(err)) +
          " (the backend endpoint may not be deployed yet).",
      ),
    );
    return;
  }
  const present = !!data.present;
  status.replaceChildren(
    el(
      "div",
      { class: "gh-status-line" },
      el("span", { class: "gh-dot " + (present ? "present" : "absent") }),
      el(
        "span",
        { class: "gh-status-text " + (present ? "present" : "absent") },
        present ? "token stored ✓" : "not set",
      ),
    ),
  );
}

async function submitGithub(e) {
  e.preventDefault();
  const formEl = e.target;
  const out = $("gh-result");
  out.className = "ma-result";
  out.textContent = "";

  const agent = $("ma-agent").value;
  if (!agent) {
    out.className = "ma-result err";
    out.textContent = "select an agent first.";
    return;
  }

  const fd = new FormData(formEl);
  fd.set("agent", agent);

  const btn = formEl.querySelector('button[type="submit"]');
  const orig = btn.textContent;
  btn.disabled = true;
  btn.textContent = "storing…";

  try {
    const resp = await fetch("/api/github-account", {
      method: "POST",
      headers: { "Content-Type": "application/x-www-form-urlencoded" },
      body: new URLSearchParams(fd),
    });

    if (resp.ok) {
      let body = {};
      try {
        body = await resp.json();
      } catch {
        /* tolerate odd 2xx body */
      }
      if (body.ok) {
        out.className = "ma-result ok";
        out.textContent = "✓ token stored.";
        clearSecrets(formEl);
        loadGithubStatus(agent);
      } else {
        out.className = "ma-result err";
        out.textContent = "✗ store failed (unexpected response).";
        clearSecrets(formEl);
      }
    } else {
      const msg = problemMessage(await readApiError(resp));
      out.className = "ma-result err";
      out.textContent =
        "✗ " + (msg || "store failed (HTTP " + resp.status + ")");
      clearSecrets(formEl);
    }
  } catch (err) {
    out.className = "ma-result err";
    out.textContent =
      "✗ request failed: " +
      String(err) +
      " (the backend endpoint may not be deployed yet).";
  } finally {
    btn.disabled = false;
    btn.textContent = orig;
  }
}

// ─── init ─────────────────────────────────────────────────────────────

async function onAgentChange(agent) {
  loadGithubStatus(agent);
}

async function init() {
  await loadState();
  renderAgentPicker();
  $("ma-agent").addEventListener("change", (e) =>
    onAgentChange(e.target.value),
  );
  $("gh-form").addEventListener("submit", submitGithub);

  document.getElementById("cred-tabbar").configure({
    tabs: [{ id: "github", label: "GITHUB" }],
    defaultId: "github",
  });

  onAgentChange("");
}

init();