"use strict";

// Admin panel. Loads redacted config + schema, renders each section, and saves per
// section via PUT /api/admin/config. Secrets are write-only: the password field is only
// sent when the admin types something.

let CONFIG = null;    // redacted config
let SCHEMA = null;
let CSRF = null;
let logTimer = null;

const $ = (id) => document.getElementById(id);

async function api(path, opts = {}) {
  const res = await fetch(path, {
    headers: { "Content-Type": "application/json", ...(CSRF ? { "X-CSRF-Token": CSRF } : {}) },
    ...opts,
  });
  if (res.status === 401) { window.location = "/login"; throw new Error("Not signed in"); }
  if (res.status === 403) { throw new Error("Admin access required"); }
  const data = await res.json().catch(() => ({}));
  if (!res.ok) {
    const msg = data.errors ? data.errors.map((e) => `${e.field}: ${e.message}`).join("; ")
                            : (data.error || `HTTP ${res.status}`);
    throw new Error(msg);
  }
  return data;
}

async function init() {
  // Grab CSRF from the quarantine config endpoint (shared session token).
  try { CSRF = (await (await fetch("/api/config")).json()).csrf_token; } catch { /* ignore */ }
  await load();
  wire();
  refreshJobs();
  refreshLogs();
}

async function load() {
  const data = await api("/api/admin/config");
  CONFIG = data.config;
  SCHEMA = data.schema;
  renderAccess();
  renderPps();
  renderFolders();
  renderDefaults();
  renderReportRelease();
  renderNav();
}

// ---------- Access ----------
function renderAccess() {
  const body = $("users-body");
  body.innerHTML = "";
  (CONFIG.auth.users || []).forEach((u, i) => {
    const tr = document.createElement("tr");
    tr.innerHTML =
      `<td>${esc(u.email)}</td>` +
      `<td><select data-uidx="${i}">${SCHEMA.roles.map((r) =>
        `<option value="${r}" ${r === u.role ? "selected" : ""}>${r}</option>`).join("")}</select></td>` +
      `<td><button class="btn small" data-remove="${i}">Remove</button></td>`;
    body.append(tr);
  });
  body.querySelectorAll("[data-remove]").forEach((b) =>
    b.onclick = () => { CONFIG.auth.users.splice(+b.dataset.remove, 1); renderAccess(); });
  body.querySelectorAll("[data-uidx]").forEach((s) =>
    s.onchange = () => { CONFIG.auth.users[+s.dataset.uidx].role = s.value; });
  $("denied-message").value = CONFIG.auth.denied_message || "";
  const banner = $("auth-mode-banner");
  if (SCHEMA.auth_mode === "static") {
    banner.textContent = "Auth mode is STATIC (development). Set [auth] mode = \"oidc\" in the server config for production.";
    banner.classList.remove("hidden");
  } else banner.classList.add("hidden");
}

function addUser() {
  const email = $("new-user-email").value.trim();
  if (!email) return;
  CONFIG.auth.users = CONFIG.auth.users || [];
  CONFIG.auth.users.push({ email, role: $("new-user-role").value });
  $("new-user-email").value = "";
  renderAccess();
}

// ---------- PPS ----------
function renderPps() {
  const p = CONFIG.pps;
  $("pps-base_url").value = p.base_url || "";
  $("pps-username").value = p.username || "";
  $("pps-verify_tls").checked = !!p.verify_tls;
  $("pps-timeout").value = p.timeout ?? 120;
  $("pps-client_cert").value = p.client_cert || "";
  $("pps-client_key").value = p.client_key || "";
  $("pps-password").value = "";
  $("pps-password-state").textContent = p.password_set ? "Password is set" : "No password set";
}

// ---------- Folders ----------
function renderFolders() {
  const list = $("folders-list");
  list.innerHTML = "";
  (CONFIG.quarantine.folders || []).forEach((f, i) => {
    const li = document.createElement("li");
    li.className = "chip";
    li.innerHTML = `<span>${esc(f)}</span><button data-fi="${i}" title="remove">✕</button>`;
    list.append(li);
  });
  list.querySelectorAll("[data-fi]").forEach((b) =>
    b.onclick = () => { CONFIG.quarantine.folders.splice(+b.dataset.fi, 1); renderFolders(); });
  fillFolderSelect($("q-default_folder"), CONFIG.quarantine.default_folder);
  fillFolderSelect($("q-deleted_folder"), CONFIG.quarantine.deleted_folder);
}

function addFolder() {
  const v = $("new-folder").value.trim();
  if (!v) return;
  CONFIG.quarantine.folders = CONFIG.quarantine.folders || [];
  CONFIG.quarantine.folders.push(v);
  $("new-folder").value = "";
  renderFolders();
  renderReportRelease();
}

function fillFolderSelect(sel, current) {
  sel.innerHTML = (CONFIG.quarantine.folders || [])
    .map((f) => `<option value="${esc(f)}" ${f === current ? "selected" : ""}>${esc(f)}</option>`).join("");
}

// ---------- Defaults ----------
function renderDefaults() {
  const q = CONFIG.quarantine;
  $("q-default_limit").value = q.default_limit ?? 200;
  $("q-default_days_back").value = q.default_days_back ?? 7;
  $("q-list_query").value = q.list_query || "";
  $("q-chunk_size").value = q.chunk_size ?? 25;
  fillOptions($("q-default_sort_field"), SCHEMA.sort_fields, q.default_sort_field);
  fillOptions($("q-default_sort_dir"), SCHEMA.sort_dirs, q.default_sort_dir);
}

// ---------- Report & Release ----------
function renderReportRelease() {
  const rr = CONFIG.quarantine.report_release || { steps: [], move_target: "" };
  const box = $("rr-steps");
  box.innerHTML = SCHEMA.steps.map((s) =>
    `<label class="field-inline"><input type="checkbox" data-step="${s}" ${rr.steps.includes(s) ? "checked" : ""}> ${s}</label>`
  ).join("");
  box.querySelectorAll("[data-step]").forEach((c) => c.onchange = updateRrSentence);
  fillFolderSelect($("rr-move_target"), rr.move_target);
  $("rr-step_delay_seconds").value = rr.step_delay_seconds ?? 60;
  updateRrSentence();
}

function currentSteps() {
  // Preserve canonical order from the schema.
  return SCHEMA.steps.filter((s) => document.querySelector(`[data-step="${s}"]`)?.checked);
}

function updateRrSentence() {
  const steps = currentSteps();
  const move = $("rr-move_target").value;
  const deleted = CONFIG.quarantine.deleted_folder;
  const parts = steps.map((s) =>
    s === "release" ? "released in place" :
    s === "move" ? `moved to "${move}"` :
    s === "delete" ? `deleted to "${deleted}"` : s);
  $("rr-sentence").textContent = parts.length ? parts.join(" → ") : "(no steps selected)";
}

// ---------- Saving ----------
async function save(section) {
  let patch = {};
  if (section === "access") {
    patch = { auth: { users: CONFIG.auth.users || [], denied_message: $("denied-message").value } };
  } else if (section === "pps") {
    const pps = {
      base_url: $("pps-base_url").value.trim(),
      username: $("pps-username").value.trim(),
      verify_tls: $("pps-verify_tls").checked,
      timeout: +$("pps-timeout").value,
      client_cert: $("pps-client_cert").value.trim(),
      client_key: $("pps-client_key").value.trim(),
    };
    if ($("pps-password").value) pps.password = $("pps-password").value;  // write-only
    patch = { pps };
  } else if (section === "folders") {
    patch = { quarantine: {
      folders: CONFIG.quarantine.folders || [],
      default_folder: $("q-default_folder").value,
      deleted_folder: $("q-deleted_folder").value,
    } };
  } else if (section === "defaults") {
    patch = { quarantine: {
      default_limit: +$("q-default_limit").value,
      default_days_back: +$("q-default_days_back").value,
      list_query: $("q-list_query").value.trim(),
      chunk_size: +$("q-chunk_size").value,
      default_sort_field: $("q-default_sort_field").value,
      default_sort_dir: $("q-default_sort_dir").value,
    } };
  } else if (section === "rr") {
    patch = { quarantine: { report_release: {
      steps: currentSteps(),
      move_target: $("rr-move_target").value,
      step_delay_seconds: +$("rr-step_delay_seconds").value,
    } } };
  }
  try {
    const res = await api("/api/admin/config", { method: "PUT", body: JSON.stringify(patch) });
    CONFIG = res.config;
    let msg = "Saved.";
    if (res.restart_required && res.restart_required.length)
      msg += ` Restart required for: ${res.restart_required.join(", ")}.`;
    toast(msg, false);
    await load();
  } catch (err) {
    toast(err.message, true);
  }
}

// ---------- PPS test ----------
async function testPps() {
  $("pps-test-result").textContent = "Testing…";
  const body = {
    base_url: $("pps-base_url").value.trim(),
    username: $("pps-username").value.trim(),
    verify_tls: $("pps-verify_tls").checked,
    timeout: +$("pps-timeout").value,
    client_cert: $("pps-client_cert").value.trim(),
    client_key: $("pps-client_key").value.trim(),
  };
  if ($("pps-password").value) body.password = $("pps-password").value;
  try {
    const res = await api("/api/admin/pps-test", { method: "POST", body: JSON.stringify(body) });
    const el = $("pps-test-result");
    el.textContent = res.detail;
    el.className = "hint " + (res.ok ? "ok" : "err");
  } catch (err) { $("pps-test-result").textContent = err.message; }
}

// ---------- Jobs ----------
async function refreshJobs() {
  try {
    const data = await api("/api/admin/jobs");
    const body = $("jobs-body");
    body.innerHTML = "";
    (data.jobs || []).forEach((j) => {
      const tr = document.createElement("tr");
      tr.innerHTML =
        `<td>${j.id}</td><td>${esc(j.user || "-")}</td><td>${esc(j.action)}</td>` +
        `<td>${esc(j.folder)}</td><td class="st-${j.status}">${j.status}</td>` +
        `<td>${j.processed}/${j.total}</td>` +
        `<td>${j.status === "failed" ? `<button class="btn small" data-retry="${j.id}">Retry</button>` : ""}</td>`;
      body.append(tr);
    });
    body.querySelectorAll("[data-retry]").forEach((b) =>
      b.onclick = async () => { await api(`/api/admin/jobs/${b.dataset.retry}/retry`, { method: "POST" }); refreshJobs(); });
  } catch (err) { toast(err.message, true); }
}

// ---------- Logs ----------
async function refreshLogs() {
  clearTimeout(logTimer);
  try {
    const source = $("log-source").value;
    const q = encodeURIComponent($("log-filter").value || "");
    const data = await api(`/api/admin/logs?source=${source}&lines=300&q=${q}`);
    $("log-view").innerHTML = (data.lines || [])
      .map((l) => `<div class="log-line log-${l.level}">${esc(l.text)}</div>`).join("")
      || '<div class="log-line">(empty)</div>';
  } catch (err) { $("log-view").textContent = err.message; }
  if ($("log-auto").checked && document.visibilityState === "visible")
    logTimer = setTimeout(refreshLogs, 5000);
}

// ---------- misc ----------
function renderNav() {
  const secs = [["sec-access","Access"],["sec-pps","PPS"],["sec-folders","Folders"],
    ["sec-defaults","Defaults"],["sec-rr","Report & Release"],["sec-jobs","Jobs"],["sec-logs","Logs"]];
  $("admin-nav").innerHTML = secs.map(([id,label]) =>
    `<a href="#${id}">${label}</a>`).join("");
}

function fillOptions(sel, opts, current) {
  sel.innerHTML = opts.map((o) => `<option value="${o}" ${o === current ? "selected" : ""}>${o}</option>`).join("");
}

function wire() {
  document.querySelectorAll("[data-save]").forEach((b) => b.onclick = () => save(b.dataset.save));
  $("add-user-btn").onclick = addUser;
  $("add-folder-btn").onclick = addFolder;
  $("pps-test-btn").onclick = testPps;
  $("jobs-refresh").onclick = refreshJobs;
  $("log-refresh").onclick = refreshLogs;
  $("log-source").onchange = refreshLogs;
  $("q-deleted_folder")?.addEventListener("change", updateRrSentence);
}

let toastTimer = null;
function toast(msg, isError) {
  const t = $("toast");
  t.textContent = msg;
  t.className = "toast " + (isError ? "err" : "ok");
  clearTimeout(toastTimer);
  toastTimer = setTimeout(() => t.classList.add("hidden"), 6000);
}

function esc(s) {
  return String(s ?? "").replace(/[&<>"']/g, (c) =>
    ({ "&": "&amp;", "<": "&lt;", ">": "&gt;", '"': "&quot;", "'": "&#39;" }[c]));
}

init();