/* ==========================================================================
   PoE Manager — shared UI behaviour (sidebar, theme, modals, toasts)
   ========================================================================== */

(function () {
  "use strict";

  /* ---------------- Theme ---------------- */

  const THEME_KEY = "poe-theme";

  function applyTheme(theme) {
    document.documentElement.setAttribute("data-theme", theme);
    document.querySelectorAll("[data-theme-icon]").forEach((el) => {
      el.innerHTML = theme === "light" ? ICONS.moon : ICONS.sun;
    });
  }

  function initTheme() {
    const saved = localStorage.getItem(THEME_KEY) ||
      (window.matchMedia && window.matchMedia("(prefers-color-scheme: light)").matches ? "light" : "dark");
    applyTheme(saved);
  }

  function toggleTheme() {
    const current = document.documentElement.getAttribute("data-theme") === "light" ? "light" : "dark";
    const next = current === "light" ? "dark" : "light";
    localStorage.setItem(THEME_KEY, next);
    applyTheme(next);
  }

  const ICONS = {
    sun: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round"><circle cx="12" cy="12" r="4"/><path d="M12 2v2M12 20v2M4.9 4.9l1.4 1.4M17.7 17.7l1.4 1.4M2 12h2M20 12h2M4.9 19.1l1.4-1.4M17.7 6.3l1.4-1.4"/></svg>',
    moon: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M21 12.8A9 9 0 1111.2 3a7 7 0 009.8 9.8z"/></svg>',
  };

  /* ---------------- Sidebar (mobile) ---------------- */

  function initSidebar() {
    const sidebar = document.querySelector(".sidebar");
    const backdrop = document.querySelector(".sidebar-backdrop");
    const main = document.querySelector(".main");
    const toggles = document.querySelectorAll("[data-sidebar-toggle]");
    if (!sidebar) return;

    const DESKTOP_BREAKPOINT = 900;
    const COLLAPSE_KEY = "poe-sidebar-collapsed";

    // Mobile: temporäres Überlagern per Hamburger + Backdrop.
    function open() {
      sidebar.classList.add("open");
      backdrop && backdrop.classList.add("open");
    }
    function close() {
      sidebar.classList.remove("open");
      backdrop && backdrop.classList.remove("open");
    }

    // Desktop: dauerhaftes Ein-/Ausklappen, über Neuladen hinweg gemerkt.
    function setCollapsed(collapsed) {
      sidebar.classList.toggle("collapsed", collapsed);
      main && main.classList.toggle("sidebar-collapsed", collapsed);
      localStorage.setItem(COLLAPSE_KEY, collapsed ? "1" : "0");
    }

    if (localStorage.getItem(COLLAPSE_KEY) === "1") setCollapsed(true);

    toggles.forEach((btn) => btn.addEventListener("click", () => {
      if (window.innerWidth <= DESKTOP_BREAKPOINT) {
        sidebar.classList.contains("open") ? close() : open();
      } else {
        setCollapsed(!sidebar.classList.contains("collapsed"));
      }
    }));
    backdrop && backdrop.addEventListener("click", close);
    document.querySelectorAll(".nav-item").forEach((a) => a.addEventListener("click", close));
  }

  /* ---------------- Modals ---------------- */

  function openModal(id) {
    const el = document.getElementById(id);
    if (!el) return;
    el.classList.add("open");
    document.body.style.overflow = "hidden";
  }

  function closeModal(el) {
    const overlay = el.closest ? el.closest(".modal-overlay") : el;
    if (!overlay) return;
    overlay.classList.remove("open");
    document.body.style.overflow = "";
  }

  function initModals() {
    document.querySelectorAll("[data-open-modal]").forEach((trigger) => {
      trigger.addEventListener("click", () => openModal(trigger.getAttribute("data-open-modal")));
    });
    document.querySelectorAll("[data-close-modal]").forEach((btn) => {
      btn.addEventListener("click", () => closeModal(btn));
    });
    document.querySelectorAll(".modal-overlay").forEach((overlay) => {
      overlay.addEventListener("click", (e) => {
        if (e.target === overlay) closeModal(overlay);
      });
    });
    document.addEventListener("keydown", (e) => {
      if (e.key === "Escape") {
        document.querySelectorAll(".modal-overlay.open").forEach((o) => closeModal(o));
      }
    });
  }

  /* ---------------- Confirm dialog (replaces window.confirm) ---------------- */

  function ensureConfirmModal() {
    if (document.getElementById("confirm-modal")) return;
    const html = `
      <div class="modal-overlay" id="confirm-modal">
        <div class="modal" style="max-width:380px;">
          <div class="modal-header">
            <h3 id="confirm-title">Bist du sicher?</h3>
            <button type="button" class="modal-close" data-close-modal>&times;</button>
          </div>
          <div class="modal-body">
            <p id="confirm-message" class="text-dim"></p>
          </div>
          <div class="modal-footer">
            <button type="button" class="btn btn-secondary" data-close-modal>Abbrechen</button>
            <button type="button" class="btn btn-danger" id="confirm-ok" style="background:var(--danger);color:#fff;">Bestätigen</button>
          </div>
        </div>
      </div>`;
    document.body.insertAdjacentHTML("beforeend", html);
    document.querySelectorAll("#confirm-modal [data-close-modal]").forEach((btn) => {
      btn.addEventListener("click", () => closeModal(btn));
    });
    document.getElementById("confirm-modal").addEventListener("click", (e) => {
      if (e.target.id === "confirm-modal") closeModal(e.target);
    });
  }

  window.confirmAction = function (message, onConfirm, title) {
    ensureConfirmModal();
    document.getElementById("confirm-title").innerText = title || "Bist du sicher?";
    document.getElementById("confirm-message").innerText = message;
    const okBtn = document.getElementById("confirm-ok");
    const freshBtn = okBtn.cloneNode(true);
    okBtn.parentNode.replaceChild(freshBtn, okBtn);
    freshBtn.addEventListener("click", () => {
      closeModal(freshBtn);
      onConfirm();
    });
    openModal("confirm-modal");
  };

  /* Intercept forms/buttons marked with data-confirm="message" */
  function initConfirmables() {
    document.querySelectorAll("form[data-confirm]").forEach((form) => {
      form.addEventListener("submit", function (e) {
        if (form.dataset.confirmed === "1") return;
        e.preventDefault();
        window.confirmAction(form.getAttribute("data-confirm"), () => {
          form.dataset.confirmed = "1";
          form.requestSubmit ? form.requestSubmit() : form.submit();
        }, form.getAttribute("data-confirm-title"));
      });
    });
  }

  /* ---------------- Toasts ---------------- */

  function ensureToastStack() {
    let stack = document.querySelector(".toast-stack");
    if (!stack) {
      stack = document.createElement("div");
      stack.className = "toast-stack";
      document.body.appendChild(stack);
    }
    return stack;
  }

  window.showToast = function (message, type) {
    const stack = ensureToastStack();
    const toast = document.createElement("div");
    toast.className = "toast " + (type || "info");
    toast.innerHTML = `<span>${message}</span><span class="toast-close">&times;</span>`;
    stack.appendChild(toast);
    const remove = () => {
      toast.classList.add("hide");
      setTimeout(() => toast.remove(), 180);
    };
    toast.querySelector(".toast-close").addEventListener("click", remove);
    setTimeout(remove, 5000);
  };

  function initFlashedMessages() {
    const data = document.getElementById("flashed-data");
    if (!data) return;
    try {
      const messages = JSON.parse(data.textContent);
      messages.forEach(([category, msg]) => {
        const type = category === "danger" ? "danger" : category === "success" ? "success" : "info";
        window.showToast(msg, type);
      });
    } catch (e) { /* noop */ }
  }

  /* Nav-Gruppen mit Untermenü (z.B. "Logs") auf-/zuklappen */
  function initNavGroups() {
    document.querySelectorAll("[data-nav-group-toggle]").forEach((btn) => {
      btn.addEventListener("click", () => {
        btn.closest("[data-nav-group]").classList.toggle("expanded");
      });
    });
  }

  /* ---------------- Globaler "Nächste Prüfung"-Timer (Topbar, jede Seite) ---------------- */

  function initCheckTimer() {
    const pill = document.getElementById("global-timer-pill");
    const timerEl = document.getElementById("global-timer");
    if (!pill || !timerEl) return;
    const lastRunMs = parseInt(pill.dataset.lastRunMs, 10);
    const intervalMs = parseInt(pill.dataset.intervalMs, 10);
    if (!intervalMs) { timerEl.textContent = "--"; return; }

    function update() {
      let remainingMs = intervalMs;
      if (!isNaN(lastRunMs) && lastRunMs > 0) {
        const elapsed = Date.now() - lastRunMs;
        remainingMs = intervalMs - (((elapsed % intervalMs) + intervalMs) % intervalMs);
      }
      timerEl.textContent = Math.max(0, Math.ceil(remainingMs / 1000));
    }
    update();
    setInterval(update, 1000);
  }

  /* ---------------- Sortierbare Tabellen ---------------- */
  /*
   * Klick auf <th data-sort-key="..."> sortiert die Tabelle. Zwei Modi:
   * - Normale Tabellen: sortiert <tr>-Zeilen innerhalb des einzigen <tbody>
   *   anhand von data-sort-<key> auf der jeweiligen <tr>.
   * - Akkordeon-Tabellen (mehrere <tbody>, z.B. Gruppen mit Detail-Zeile):
   *   sortiert ganze <tbody>-Blöcke anhand von data-sort-<key> auf dem
   *   jeweiligen <tbody>, damit Haupt- und Detail-Zeile zusammenbleiben.
   *   <tbody data-sort-pinned> (z.B. die virtuelle "Admin"-Zeile) bleibt
   *   dabei immer an ihrer Position.
   */
  function compareSortValues(a, b, asc) {
    a = (a === null || a === undefined) ? "" : String(a);
    b = (b === null || b === undefined) ? "" : String(b);
    const na = parseFloat(a), nb = parseFloat(b);
    const bothNumeric = a !== "" && b !== "" && !isNaN(na) && !isNaN(nb);
    const cmp = bothNumeric ? (na - nb) : a.toLowerCase().localeCompare(b.toLowerCase(), "de");
    return asc ? cmp : -cmp;
  }

  function sortTable(table, th) {
    const key = th.dataset.sortKey;
    const asc = th.dataset.sortDir !== "asc";
    table.querySelectorAll("thead th[data-sort-key]").forEach((h) => {
      delete h.dataset.sortDir;
      h.classList.remove("sort-asc", "sort-desc");
    });
    th.dataset.sortDir = asc ? "asc" : "desc";
    th.classList.add(asc ? "sort-asc" : "sort-desc");

    if (table.tBodies.length > 1) {
      const movable = Array.prototype.filter.call(table.tBodies, (tb) => !tb.hasAttribute("data-sort-pinned"));
      movable.sort((a, b) => compareSortValues(
        a.getAttribute("data-sort-" + key), b.getAttribute("data-sort-" + key), asc
      ));
      movable.forEach((tb) => table.appendChild(tb));
    } else {
      const tbody = table.tBodies[0];
      const rows = Array.prototype.filter.call(tbody.rows, (r) => !r.classList.contains("empty-row"));
      rows.sort((a, b) => compareSortValues(
        a.getAttribute("data-sort-" + key), b.getAttribute("data-sort-" + key), asc
      ));
      rows.forEach((r) => tbody.appendChild(r));
    }
  }

  function initSortableTables() {
    document.querySelectorAll("table[data-sortable] thead th[data-sort-key]").forEach((th) => {
      th.classList.add("sortable-col");
      th.addEventListener("click", () => sortTable(th.closest("table"), th));
    });
  }

  /* ---------------- Init ---------------- */

  document.addEventListener("DOMContentLoaded", function () {
    initTheme();
    initSidebar();
    initModals();
    initConfirmables();
    initFlashedMessages();
    initNavGroups();
    initCheckTimer();
    initSortableTables();
    document.querySelectorAll("[data-theme-toggle]").forEach((btn) => btn.addEventListener("click", toggleTheme));
  });

  window.PoeUI = { openModal, closeModal };
})();