/**
 * ClauseGuard — Popup Script v4.3
 * Shows user status (logged in / guest), scan results, usage.
 *
 * FIXED v4.3: sidePanel.open() is properly awaited.
 * FIXED v4.3: CRITICAL severity is now counted and displayed.
 * FIXED v4.3: Shows scan source ("Legal-BERT" / "Local") accurately.
 */

document.addEventListener("DOMContentLoaded", async () => {
  const resultsView = document.getElementById("results-view");
  const emptyView = document.getElementById("empty-view");
  const limitBanner = document.getElementById("limit-banner");
  const userBar = document.getElementById("user-bar");
  const userEmail = document.getElementById("user-email");
  const userPlan = document.getElementById("user-plan");
  const guestBar = document.getElementById("guest-bar");

  let tab;
  try { const [t] = await chrome.tabs.query({ active: true, currentWindow: true }); tab = t; } catch { return; }
  if (!tab?.id) return;

  // Load user info
  let auth = null;
  try { auth = await chrome.runtime.sendMessage({ type: "GET_USER" }); } catch {}

  if (auth?.isLoggedIn) {
    if (userBar) userBar.style.display = "flex";
    if (guestBar) guestBar.style.display = "none";
    if (userEmail) userEmail.textContent = auth.email || "User";
    if (userPlan) {
      userPlan.textContent = auth.plan?.toUpperCase() || "FREE";
      userPlan.className = "plan-badge plan-" + (auth.plan || "free");
    }
  } else {
    if (userBar) userBar.style.display = "none";
    if (guestBar) guestBar.style.display = "flex";
  }

  // Check usage
  let usage = null;
  try { usage = await chrome.runtime.sendMessage({ type: "CHECK_USAGE" }); } catch {}
  updateUsage(usage);

  if (usage && !usage.allowed && limitBanner) limitBanner.style.display = "block";

  // Load results
  let results = null;
  try { results = await chrome.runtime.sendMessage({ type: "GET_RESULTS", tabId: tab.id }); } catch {}

  if (results && results.risk_score !== undefined) {
    showResults(results);
  } else {
    if (emptyView) emptyView.style.display = "block";
    if (resultsView) resultsView.style.display = "none";
  }

  // Scan button
  const btnScan = document.getElementById("btn-scan");
  if (btnScan) {
    btnScan.addEventListener("click", async () => {
      if (usage && !usage.allowed) { if (limitBanner) limitBanner.style.display = "block"; return; }
      btnScan.textContent = "Scanning..."; btnScan.disabled = true;
      try {
        await chrome.tabs.sendMessage(tab.id, { type: "TRIGGER_SCAN" });
        setTimeout(async () => {
          try {
            const r = await chrome.runtime.sendMessage({ type: "GET_RESULTS", tabId: tab.id });
            if (r?.risk_score !== undefined) showResults(r);
          } catch {}
          try { usage = await chrome.runtime.sendMessage({ type: "CHECK_USAGE" }); updateUsage(usage); } catch {}
          btnScan.textContent = "Scan this page"; btnScan.disabled = false;
        }, 3000);
      } catch { btnScan.textContent = "Error — refresh page"; btnScan.disabled = false; }
    });
  }

  // Re-scan
  const btnRescan = document.getElementById("btn-rescan");
  if (btnRescan) btnRescan.addEventListener("click", async () => {
    if (usage && !usage.allowed) { if (limitBanner) limitBanner.style.display = "block"; return; }
    try { await chrome.tabs.sendMessage(tab.id, { type: "TRIGGER_SCAN" }); } catch {} window.close();
  });

  // FIX v4.3: Properly await async sidePanel.open() so errors are caught
  const btnDetails = document.getElementById("btn-details");
  if (btnDetails) btnDetails.addEventListener("click", async () => {
    try { await chrome.sidePanel.open({ tabId: tab.id }); } catch(e) { console.warn("sidePanel.open failed:", e); }
    window.close();
  });

  // Login button
  const btnLogin = document.getElementById("btn-login");
  if (btnLogin) btnLogin.addEventListener("click", () => {
    chrome.tabs.create({ url: "https://clauseguardweb.netlify.app/auth/login" });
  });
});

function showResults(results) {
  const rv = document.getElementById("results-view");
  const ev = document.getElementById("empty-view");
  if (rv) rv.style.display = "block";
  if (ev) ev.style.display = "none";

  const el = (id) => document.getElementById(id);
  if (el("risk-score")) el("risk-score").textContent = results.risk_score;

  const grade = results.grade || "C";
  const badge = el("grade-badge");
  if (badge) { badge.className = "grade grade-" + grade.toLowerCase(); badge.textContent = "Grade " + grade; }

  const bar = el("bar-fill");
  if (bar) {
    bar.style.width = results.risk_score + "%";
    bar.className = "bar-fill " + (results.risk_score >= 60 ? "bar-red" : results.risk_score >= 30 ? "bar-amber" : "bar-green");
  }

  // FIX v4.3: Count CRITICAL severity too (backend can return it)
  const counts = { CRITICAL: 0, HIGH: 0, MEDIUM: 0, LOW: 0 };
  (results.results || []).forEach(r => (r.categories || []).forEach(c => {
    if (counts[c.severity] !== undefined) counts[c.severity]++;
    else counts.MEDIUM++; // Unknown severities default to MEDIUM
  }));
  // Merge CRITICAL into HIGH for display (popup only has 3 columns)
  if (el("c-high")) el("c-high").textContent = counts.CRITICAL + counts.HIGH;
  if (el("c-med")) el("c-med").textContent = counts.MEDIUM;
  if (el("c-low")) el("c-low").textContent = counts.LOW;

  // Show source indicator
  const src = el("scan-source");
  if (src) src.textContent = results.source === "api" ? "Legal-BERT" : results.source === "local" ? "Local (offline)" : "";
}

function updateUsage(usage) {
  if (!usage) return;
  const text = document.getElementById("usage-text");
  const fill = document.getElementById("usage-fill");
  if (!text || !fill) return;
  if (usage.plan === "free") {
    text.textContent = usage.used + "/" + usage.limit + " scans";
    const pct = Math.min(100, (usage.used / usage.limit) * 100);
    fill.style.width = pct + "%";
    if (pct >= 100) fill.style.background = "#ef4444";
    else if (pct >= 70) fill.style.background = "#f59e0b";
  } else {
    text.textContent = "Unlimited";
    fill.style.width = "100%"; fill.style.background = "#22c55e";
  }
}