import { CLIENT_ID } from "./config.js";
import {
  signIn,
  restoreSession,
  clearSession,
  isConfigured,
} from "./goostr.js";
import { pool } from "./relay.js";

const $ = (id) => document.getElementById(id);
const views = ["loading", "signin", "home"];
function show(view) {
  for (const v of views) $(`view-${v}`).classList.toggle("hidden", v !== view);
}
function setStatus(id, msg, kind = "") {
  const el = $(id);
  el.textContent = msg;
  el.className = "status" + (kind ? " " + kind : "");
}

let signer = null;
let currentProfile = null;
let publishedProfileTs = 0; // most-recent kind-0 we've published or rendered

const DEFAULT_AVATAR = `data:image/svg+xml;utf8,${encodeURIComponent(
  `<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 64 64'>
    <rect width='64' height='64' rx='32' fill='#1e2128'/>
    <text x='32' y='42' font-size='32' text-anchor='middle' font-family='sans-serif'>👤</text>
  </svg>`
)}`;

// ---------- sign-in ----------

$("signin-go").addEventListener("click", async () => {
  $("signin-go").disabled = true;
  try {
    const { signer: s, profile, isNewIdentity } = await signIn({
      clientId: CLIENT_ID,
      onStatus: (msg) => setStatus("signin-status", msg),
    });
    signer = s;
    currentProfile = profile;

    setStatus("signin-status", "Connecting to relays…");
    const unsubStatus = pool.onStatus((snap) => {
      const open = Object.values(snap).filter((s) => s === "open").length;
      setStatus("signin-status", `Connecting to relays… ${open}/${Object.keys(snap).length}`);
    });
    await pool.connectAll({ minRelays: 1 });
    unsubStatus();

    if (isNewIdentity) {
      // First time: publish a kind-0 with the Google name + picture so this
      // user shows up properly on nostr.
      publishProfileEvent(profile);
    }

    enterHome(profile);
  } catch (err) {
    console.error(err);
    setStatus("signin-status", err.message || String(err), "error");
    $("signin-go").disabled = false;
  }
});

$("sign-out").addEventListener("click", () => {
  clearSession();
  signer = null;
  location.reload();
});

// ---------- home / live profile / notes ----------

function publishProfileEvent(profile) {
  const event = signer.sign({
    kind: 0,
    content: JSON.stringify({
      name: profile.name,
      picture: profile.picture,
      // `nip05` would be nice here but we don't host one
    }),
    tags: [],
  });
  pool.publish(event);
  publishedProfileTs = event.created_at;
}

function enterHome(profile) {
  $("me-name").textContent = profile.name || "anonymous";
  $("me-pic").src = profile.picture || DEFAULT_AVATAR;
  $("me-npub").textContent = signer.npub;
  show("home");
  pool.onStatus(renderRelayDots);
  startLiveProfile(signer.pubkey, profile);
  loadNotes();
}

function renderRelayDots(snap) {
  const host = $("relay-dots");
  host.innerHTML = "";
  for (const [url, state] of Object.entries(snap)) {
    const dot = document.createElement("span");
    dot.className = `relay-dot ${state}`;
    dot.title = `${url} — ${state}`;
    host.appendChild(dot);
  }
}

function safeJSON(s) { try { return JSON.parse(s); } catch { return {}; } }

function startLiveProfile(pubkey, googleProfile) {
  // Long-lived sub for the latest kind-0. If a relay has a newer event than
  // what's on screen, upgrade. If no relay returns anything within a few
  // seconds, our google-side profile may not have been published anywhere —
  // republish to make sure it lands.
  let sawOne = false;
  pool.subscribe(
    [{ kinds: [0], authors: [pubkey] }],
    (ev) => {
      sawOne = true;
      if (ev.created_at <= publishedProfileTs) return;
      const p = safeJSON(ev.content);
      publishedProfileTs = ev.created_at;
      if (p.name) $("me-name").textContent = p.name;
      if (p.picture) $("me-pic").src = p.picture;
    },
    null
  );

  setTimeout(() => {
    if (!sawOne && googleProfile?.name) {
      // No relay had our profile. Publish it now.
      publishProfileEvent(googleProfile);
    }
  }, 6000);
}

let notesById = new Map();

function loadNotes() {
  const tbody = $("notes-table").querySelector("tbody");
  tbody.innerHTML = "";
  setStatus("notes-status", "Loading…");
  notesById = new Map();

  pool.subscribe(
    [{ kinds: [1], authors: [signer.pubkey], limit: 50 }],
    (ev) => {
      if (notesById.has(ev.id)) return;
      notesById.set(ev.id, ev);
      renderRows([...notesById.values()], tbody);
      setStatus("notes-status", "");
    },
    null
  );

  setTimeout(() => {
    if (notesById.size === 0) {
      setStatus("notes-status", "No notes yet. Publish one above.");
    }
  }, 8000);
}

function renderRows(rows, tbody) {
  const sorted = [...rows].sort((a, b) => b.created_at - a.created_at);
  tbody.innerHTML = "";
  for (const ev of sorted) {
    const tr = document.createElement("tr");
    const t = document.createElement("td");
    t.textContent = new Date(ev.created_at * 1000).toLocaleString();
    const c = document.createElement("td");
    c.textContent = ev.content;
    tr.appendChild(t);
    tr.appendChild(c);
    tbody.appendChild(tr);
  }
}

$("note-send").addEventListener("click", () => {
  const text = $("note-text").value.trim();
  if (!text) return;
  $("note-send").disabled = true;
  const event = signer.sign({ kind: 1, content: text, tags: [] });
  pool.publish(event);
  $("note-text").value = "";
  $("note-send").disabled = false;
  notesById.set(event.id, event);
  renderRows([...notesById.values()], $("notes-table").querySelector("tbody"));
  setStatus("notes-status", "");
});

// ---------- boot ----------

(async function boot() {
  if (!isConfigured(CLIENT_ID)) {
    $("setup-banner").classList.remove("hidden");
    show("signin");
    setStatus("signin-status", "Configure CLIENT_ID in public/config.js first.", "error");
    $("signin-go").disabled = true;
    return;
  }

  const restored = restoreSession();
  if (restored) {
    signer = restored.signer;
    currentProfile = restored.profile;
    show("loading");
    $("loading-text").textContent = "Welcome back. Connecting to relays…";
    pool.onStatus(renderRelayDots);
    await pool.connectAll({ minRelays: 1 });
    enterHome(restored.profile);
    return;
  }

  show("signin");
})();