// Sia wallet panel. State comes from activate() via window.silentmode; this
// file renders and collects input. Amounts cross the bridge as hastings
// strings and are formatted here with BigInt.
const $ = (id) => document.getElementById(id);
const S = window.silentmode;
let state = null;
const H = 10n ** 24n;

function fmtSC(h, decimals = 6) {
  const v = BigInt(h || 0); const neg = v < 0n; const a = neg ? -v : v;
  let frac = (a % H).toString().padStart(24, "0").slice(0, decimals).replace(/0+$/, "");
  if (frac.length < 2) frac = frac.padEnd(2, "0");
  return (neg ? "-" : "") + (a / H).toString() + "." + frac;
}
function parseSC(text) {
  const s = String(text || "").trim().replace(/,/g, "");
  if (!/^\d*(\.\d*)?$/.test(s) || s === "" || s === ".") throw new Error("amount must be a number");
  const [w = "0", f = ""] = s.split(".");
  if (f.length > 24) throw new Error("too many decimals");
  return BigInt(w || "0") * H + BigInt((f + "0".repeat(24)).slice(0, 24));
}
const esc = (s) => String(s ?? "").replace(/[&<>"']/g, (c) => ({ "&": "&amp;", "<": "&lt;", ">": "&gt;", '"': "&quot;", "'": "&#39;" })[c]);
const openUrl = (url) => S.invoke("openUrl", { url }).catch(() => {});
const cleanErr = (e) => String(e?.message || e).replace(/^Error invoking remote method '[^']+': Error: /, "");

// ---- tabs ------------------------------------------------------------------
document.querySelectorAll("nav button").forEach((b) => b.addEventListener("click", () => showTab(b.dataset.tab)));
function showTab(name) {
  document.querySelectorAll("nav button").forEach((b) => b.classList.toggle("on", b.dataset.tab === name));
  document.querySelectorAll("main section").forEach((s) => { s.hidden = s.id !== "tab-" + name; });
  if (name !== "settings") $("recovery").innerHTML = "";
  if (name === "settings") fillSettings();
}

// ---- render ----------------------------------------------------------------
function render() {
  if (!state) return;
  const ready = state.phase === "ready";
  const gate = $("gate");
  $("tabs").hidden = !ready;
  gate.hidden = ready;
  if (!ready) {
    const copy = {
      locked:  ["🔒", "Unlock your password vault to open the wallet.", "Settings › Passwords. The wallet keys derive from the vault seed."],
      nosetup: ["🗝", "Set up a password vault to create your wallet.", "Settings › Passwords › Set up. With a recovery phrase this wallet can be recreated on any machine."],
      nourl:   ["🌐", "Point the wallet at a walletd node.", "Paste the URL of a walletd (v2, full index) node. Hosted providers give you a URL with your key in it; it stays on this machine."],
      error:   ["⚠", "The wallet could not start.", state.error || ""],
    }[state.phase] || ["…", "Starting…", ""];
    gate.innerHTML = `<div class="big">${copy[0]}</div><div><b>${esc(copy[1])}</b></div><div class="hint" style="margin-top:8px">${esc(copy[2])}</div>`
      + (state.phase === "nourl" ? `<input type="text" id="gateUrl" placeholder="https://host[:port]" spellcheck="false"><div class="actions" style="justify-content:center"><button class="btn primary" id="gateApply">Connect</button></div><div class="msg err" id="gateMsg" hidden></div>` : "");
    if (state.phase === "nourl") $("gateApply").addEventListener("click", () => applyUrl($("gateUrl").value, $("gateMsg")));
  }
  const dot = $("dot");
  dot.className = "dot " + (ready && state.server ? (state.scanning ? "busy" : "on") : "");
  $("netlbl").textContent = ready && state.server ? state.server.replace(/^https?:\/\//, "") + (state.scanning ? " · syncing" : "") : "mainnet";
  if (ready) {
    $("balSc").textContent = fmtSC(state.balance?.confirmed || 0);
    const parts = [];
    if (state.balance?.immature && state.balance.immature !== "0") parts.push(fmtSC(state.balance.immature) + " SC maturing");
    if (state.height) parts.push("block " + Number(state.height).toLocaleString("en-US"));
    if (state.feePerByte && state.feePerByte !== "0") parts.push("fee " + fmtSC(BigInt(state.feePerByte) * 1000n, 4) + " SC/kB");
    $("balSub").textContent = state.error || parts.join(" · ") || "mainnet";
  } else { $("balSc").textContent = "—"; $("balSub").textContent = "mainnet"; }
  if (!ready) return;
  if (state.address && $("addr").textContent !== state.address) {
    $("addr").textContent = state.address;
    drawQr(state.address);
  }
  $("addrMeta").textContent = `· #${state.addressIndex}`;
  renderHistory();
}

function drawQr(text) {
  const cv = $("qr"); const g = cv.getContext("2d");
  let q;
  try { q = window.QR.build(text); } catch { g.clearRect(0, 0, cv.width, cv.height); return; }
  const scale = Math.max(2, Math.floor(200 / (q.size + 2)));
  const px = (q.size + 2) * scale;
  cv.width = cv.height = px; cv.style.width = cv.style.height = px + "px";
  g.fillStyle = "#fff"; g.fillRect(0, 0, px, px); g.fillStyle = "#000";
  for (let r = 0; r < q.size; r++) for (let c = 0; c < q.size; c++) if (q.modules[r][c]) g.fillRect((c + 1) * scale, (r + 1) * scale, scale, scale);
}

function renderHistory() {
  const list = state.history || [];
  const el = $("txlist");
  if (!list.length) { el.innerHTML = `<div class="empty">${state.scanning ? "Syncing…" : "No transactions yet."}</div>`; return; }
  el.innerHTML = list.map((t) => {
    const delta = BigInt(t.delta || 0);
    const inc = delta >= 0n;
    const when = t.time ? new Date(t.time * 1000).toLocaleString(undefined, { dateStyle: "medium", timeStyle: "short" }) : "pending";
    const kind = { miner: "Mining reward", foundation: "Foundation subsidy", siafundclaim: "Siafund claim" }[String(t.type).toLowerCase()];
    const what = kind || (inc ? "Received" : "Sent" + (t.to ? " to " + esc(t.to.slice(0, 10)) + "…" : ""));
    const immature = t.maturityHeight && state.height && t.maturityHeight > state.height;
    const conf = immature ? "matures at " + t.maturityHeight : t.confirmations > 0 ? (t.confirmations >= 6 ? "confirmed" : t.confirmations + " conf") : "unconfirmed";
    return `<div class="tx" data-id="${esc(t.id)}" title="${esc(t.id)}">
      <div class="ic ${inc ? "in" : "out"}">${inc ? "↓" : "↑"}</div>
      <div class="what">${what}</div>
      <div class="amt2 ${inc ? "in" : ""}">${inc ? "+" : "−"}${fmtSC(inc ? delta : -delta)}</div>
      <div class="when">${esc(when)}</div>
      <div class="conf ${t.confirmations > 0 && !immature ? "" : "pending"}">${esc(conf)}</div>
    </div>`;
  }).join("");
  el.querySelectorAll(".tx").forEach((row) => row.addEventListener("click", () => openUrl(state.explorerTx + row.dataset.id)));
}

// ---- receive ---------------------------------------------------------------
$("copyAddr").addEventListener("click", async () => { try { await navigator.clipboard.writeText(state.address); flash($("copyAddr"), "Copied"); } catch {} });
$("nextAddr").addEventListener("click", async () => { try { state = await S.invoke("nextAddress"); render(); } catch { flash($("nextAddr"), "Failed"); } });
$("viewAddr").addEventListener("click", () => openUrl(state.explorerAddr + state.address));
function flash(btn, text) { const old = btn.textContent; btn.textContent = text; setTimeout(() => { btn.textContent = old; }, 1200); }

// ---- send ------------------------------------------------------------------
let sendMax = false, planTimer = null, lastPlan = null;
const FEE_LABELS = { 1: "normal", 2: "2× fee", 3: "3× fee" };
$("sendMax").addEventListener("click", () => {
  sendMax = !sendMax;
  $("sendMax").classList.toggle("primary", sendMax);
  $("sendAmt").disabled = sendMax;
  if (!sendMax) $("sendAmt").value = "";
  schedulePlan();
});
$("feeMult").addEventListener("input", () => { $("feeLbl").textContent = FEE_LABELS[$("feeMult").value]; schedulePlan(); });
["sendTo", "sendAmt"].forEach((id) => $(id).addEventListener("input", () => { if (id === "sendAmt" && sendMax) return; schedulePlan(); }));
function schedulePlan() { clearTimeout(planTimer); planTimer = setTimeout(updatePlan, 250); }
function sendSpec() {
  const amount = sendMax ? "0" : parseSC($("sendAmt").value).toString();
  return { to: $("sendTo").value.trim(), amount, feeMultiplier: Number($("feeMult").value), sendMax };
}
async function updatePlan() {
  const msg = $("sendMsg"); msg.hidden = true;
  lastPlan = null; $("sendBtn").disabled = true;
  $("sumAmt").textContent = $("sumFee").textContent = $("sumTotal").textContent = "—";
  if (!$("sendTo").value.trim() || (!sendMax && !$("sendAmt").value.trim())) return;
  try {
    const p = await S.invoke("planSend", sendSpec());
    lastPlan = p;
    $("sumAmt").textContent = fmtSC(p.recipients[0].value) + " SC";
    $("sumFee").textContent = fmtSC(p.fee) + " SC";
    $("sumTotal").textContent = fmtSC(p.total) + " SC";
    if (sendMax) $("sendAmt").value = fmtSC(p.recipients[0].value, 24).replace(/0+$/, "").replace(/\.$/, ".0");
    $("sendBtn").disabled = false;
  } catch (e) { msg.className = "msg err"; msg.textContent = cleanErr(e); msg.hidden = false; }
}
$("sendBtn").addEventListener("click", async () => {
  if (!lastPlan) return;
  const msg = $("sendMsg"); msg.hidden = true;
  $("sendBtn").disabled = true; $("sendBtn").textContent = "Waiting for approval…";
  try {
    const r = await S.invoke("send", sendSpec());
    msg.className = "msg ok";
    msg.innerHTML = r.txid ? `Sent. <a class="link">${esc(r.txid.slice(0, 16))}…</a>` : "Sent.";
    if (r.txid) msg.querySelector("a").addEventListener("click", () => openUrl(state.explorerTx + r.txid));
    msg.hidden = false;
    $("sendTo").value = ""; $("sendAmt").value = ""; sendMax = false; $("sendMax").classList.remove("primary"); $("sendAmt").disabled = false;
    lastPlan = null;
  } catch (e) {
    const t = cleanErr(e);
    if (t !== "cancelled") { msg.className = "msg err"; msg.textContent = t; msg.hidden = false; }
    $("sendBtn").disabled = !lastPlan;
  } finally { $("sendBtn").textContent = "Send"; }
});

// ---- settings --------------------------------------------------------------
async function fillSettings() {
  try { const s = await S.invoke("settings"); if (document.activeElement !== $("setUrl")) $("setUrl").value = s.walletdUrl || ""; } catch {}
  renderSites();
}
async function applyUrl(url, msgEl) {
  msgEl.hidden = true;
  try { state = await S.invoke("setSettings", { walletdUrl: url }); render(); }
  catch (e) { msgEl.textContent = cleanErr(e); msgEl.hidden = false; }
}
$("applySettings").addEventListener("click", () => applyUrl($("setUrl").value, $("settingsMsg")));
$("refreshBtn").addEventListener("click", async () => { try { state = await S.invoke("refresh"); render(); } catch (e) { $("settingsMsg").textContent = cleanErr(e); $("settingsMsg").hidden = false; } });
$("showInfo").addEventListener("click", async () => { try { $("recovery").innerHTML = recoveryHtml(await S.invoke("recovery", {})); } catch (e) { $("recovery").textContent = cleanErr(e); } });
$("showSeed").addEventListener("click", async () => { try { $("recovery").innerHTML = recoveryHtml(await S.invoke("recovery", { reveal: true })); } catch (e) { $("recovery").textContent = cleanErr(e); } });
function recoveryHtml(r) {
  let h = `<div class="lbl">Scheme</div><div class="mono">${esc(r.scheme)}</div><div class="lbl">First address</div><div class="mono">${esc(r.firstAddress)}</div>`;
  if (r.seedHex) h += `<div class="lbl">Wallet seed (32 bytes, hex)</div><div class="mono" style="color:var(--danger)">${esc(r.seedHex)}</div>`;
  return h;
}
async function renderSites() {
  let perms = {};
  try { perms = await S.invoke("permissions"); } catch {}
  const origins = Object.keys(perms).filter((o) => perms[o] && (perms[o].readAddress || perms[o].sendTx));
  const el = $("sites");
  if (!origins.length) { el.innerHTML = `<div class="hint">None yet.</div>`; return; }
  el.innerHTML = origins.map((o) => {
    const p = perms[o]; const what = [];
    if (p.readAddress) what.push("address");
    if (p.sendTx) { const left = BigInt(p.sendTx.cap) - BigInt(p.sendTx.used || 0); what.push(`payments: ${fmtSC(left < 0n ? 0n : left)} of ${fmtSC(p.sendTx.cap)} SC left`); }
    return `<div class="tx" style="grid-template-columns:1fr auto;cursor:default"><div><div class="mono">${esc(o)}</div><div class="hint">${esc(what.join(" · "))}</div></div><button class="btn sm" data-origin="${esc(o)}">Revoke</button></div>`;
  }).join("");
  el.querySelectorAll("button[data-origin]").forEach((b) => b.addEventListener("click", async () => { try { await S.invoke("revoke", { origin: b.dataset.origin }); renderSites(); } catch {} }));
}

// ---- boot ------------------------------------------------------------------
S.on("state", (s) => { state = s; render(); });
(async () => {
  try { state = await S.invoke("state"); render(); }
  catch (e) { $("gate").hidden = false; $("gate").innerHTML = `<div class="big">⚠</div><div>${esc(cleanErr(e))}</div>`; }
})();