(function () {
  "use strict";
  var page = document.currentScript.getAttribute("data-page");

  function esc(s) {
    return String(s == null ? "" : s).replace(/[&<>"']/g, function (c) {
      return { "&": "&amp;", "<": "&lt;", ">": "&gt;", '"': "&quot;", "'": "&#39;" }[c];
    });
  }
  function fmtDate(iso) {
    if (!iso) return "—";
    var d = new Date(iso);
    var p = function (n) { return (n < 10 ? "0" : "") + n; };
    return p(d.getDate()) + "." + p(d.getMonth() + 1) + "." + d.getFullYear();
  }
  function toastStack() {
    var el = document.getElementById("toasts");
    if (!el) { toastStack.el = (toastStack.el = el = document.createElement("div")); el.className = "kt-ai-toast-stack"; document.body.appendChild(el); }
    return el;
  }
  function toast(text, tone) {
    var t = document.createElement("div");
    t.className = "kt-ai-toast";
    if (tone) t.setAttribute("data-tone", tone);
    t.textContent = text;
    toastStack().appendChild(t);
    setTimeout(function () { t.remove(); }, 4500);
  }
  async function api(path, opts) {
    var r = await fetch("api/" + path, opts);
    var j = null;
    try { j = await r.json(); } catch (_) {}
    if (!r.ok) throw new Error((j && j.error) || "Ошибка сети, попробуйте ещё раз");
    return j;
  }

  if (page === "form") initForm();
  if (page === "app") initApp();

  /* ================= Страница формы ================= */
  function initForm() {
    var form = document.getElementById("regForm");
    var btn = document.getElementById("regSubmit");
    var errFor = { fName: 0, fEmail: 1, fPhone: 2 };

    function check(id, ok) {
      var field = document.getElementById(id).closest(".kt-ai-field");
      var err = field.querySelector(".error");
      field.setAttribute("data-invalid", ok ? "false" : "true");
      if (err) err.hidden = ok;
      return ok;
    }
    ["fName", "fEmail", "fPhone"].forEach(function (id) {
      document.getElementById(id).addEventListener("input", function () { check(id, true); });
    });

    form.addEventListener("submit", async function (e) {
      e.preventDefault();
      var okName = check("fName", document.getElementById("fName").value.trim().length >= 3);
      var okEmail = check("fEmail", /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(document.getElementById("fEmail").value.trim()));
      var okPhone = check("fPhone", document.getElementById("fPhone").value.replace(/\D/g, "").length >= 10);
      if (!(okName && okEmail && okPhone)) return;
      btn.setAttribute("data-loading", "true");
      try {
        var data = {};
        Array.prototype.forEach.call(form.elements, function (el) {
          if (el.name) data[el.name] = el.value.trim();
        });
        await api("registrations", {
          method: "POST",
          headers: { "Content-Type": "application/json" },
          body: JSON.stringify(data)
        });
        document.getElementById("formBlock").hidden = true;
        document.getElementById("successBlock").hidden = false;
        form.reset();
        toast("Заявка отправлена организаторам", "ok");
      } catch (err) {
        toast(err.message, "risk");
      } finally {
        btn.removeAttribute("data-loading");
      }
    });

    document.getElementById("againBtn").addEventListener("click", function () {
      document.getElementById("formBlock").hidden = false;
      document.getElementById("successBlock").hidden = true;
      document.getElementById("fName").focus();
    });
  }

  /* ================= Кабинет организатора ================= */
  var ALL = [];
  var state = { q: "", status: "" };

  function initApp() {
    var search = document.getElementById("topSearch");
    var seg = document.getElementById("statusSeg");

    search.addEventListener("input", debounce(function () {
      state.q = search.value.trim().toLowerCase();
      refreshTable();
    }, 150));
    seg.addEventListener("click", function (e) {
      var b = e.target.closest("button[data-status]");
      if (!b) return;
      state.status = b.getAttribute("data-status");
      markSeg();
      refreshTable();
    });
    document.getElementById("exportBtn").addEventListener("click", exportCsv);
    document.getElementById("drawer").addEventListener("click", function (e) {
      if (e.target === e.currentTarget) closeDrawer();
    });
    document.addEventListener("keydown", function (e) {
      if (e.key === "Escape") closeDrawer();
    });

    renderTable = renderTable.bind(null);
    load();
    markSeg();
  }

  function debounce(fn, ms) {
    var t;
    return function () {
      var a = arguments, c = this;
      clearTimeout(t);
      t = setTimeout(function () { fn.apply(c, a); }, ms);
    };
  }

  function refreshTable() {
    var rows = visible();
    renderEventHead();
    renderKpi(rows);
    renderTable(rows);
  }

  function markSeg() {
    var seg = document.getElementById("statusSeg");
    Array.prototype.forEach.call(seg.children, function (b) {
      b.setAttribute("data-active", b.getAttribute("data-status") === state.status ? "true" : "false");
    });
  }

  async function load() {
    var d;
    try {
      d = await api("registrations");
      ALL = d.registrations || [];
    } catch (err) {
      ALL = null;
    }
    document.getElementById("navCount").textContent = ALL ? ALL.length : "";
    if (!ALL) {
      var evHead = document.getElementById("eventHead");
      if (evHead) evHead.innerHTML = "";
      var el = document.getElementById("regEmpty");
      el.hidden = false;
      el.innerHTML = '<div class="kt-ai-empty"><div class="icon-spot"><svg class="kt-icon kt-icon-lg" aria-hidden="true"><use href="#alert-circle"></use></svg></div><span class="title">Список заявок недоступен</span><span>' + esc(err.message) + "</span></div>";
      document.getElementById("regTable").style.display = "none";
      return;
    }
    refreshTable();
  }

  function renderEventHead() {
    var head = document.getElementById("eventHead");
    if (!head) return;
    var byRole = {};
    (ALL || []).forEach(function (r) {
      if (r.status !== "Отменена") byRole[r.role] = (byRole[r.role] || 0) + 1;
    });
    var roles = Object.keys(byRole).map(function (k) {
      return '<span class="kt-ai-chip">' + esc(k) + " · " + byRole[k] + "</span>";
    }).join(" ");
    head.innerHTML =
      '<h1 class="evt-title" style="font-size:var(--kt-ai-text-xl);color:var(--kt-ai-fg)">Корпоративный ивент 2026 · 30 окт, Алматы, ДК «Жибек жолы»</h1>' +
      (roles ? '<div style="display:flex;flex-wrap:wrap;gap:var(--kt-ai-space-3);margin-top:var(--kt-ai-space-4)">' + roles + "</div>" : "");
  }

  function visible() {
    return ALL.filter(function (r) {
      if (state.status && r.status !== state.status) return false;
      if (state.q) {
        var hay = [r.name, r.email, r.phone, r.department, r.position, r.role, r.track].join(" ").toLowerCase();
        if (hay.indexOf(state.q) === -1) return false;
      }
      return true;
    }).sort(function (a, b) { return b.id - a.id; });
  }

  function renderTable(rows) {
    if (!rows) rows = visible();
    var body = document.getElementById("regBody");
    var table = document.getElementById("regTable");
    var empty = document.getElementById("regEmpty");

    renderKpi(rows);
    if (!rows.length) {
      table.style.display = "none";
      empty.hidden = false;
      empty.innerHTML = '<div class="kt-ai-empty"><div class="icon-spot"><svg class="kt-icon kt-icon-lg" aria-hidden="true"><use href="#check-circle"></use></svg></div><span class="title">' +
        (ALL.length ? "По фильтру ничего нет" : "Заявок пока нет") + "</span><span>" +
        (ALL.length ? "Сбросьте статус или поправьте поиск." : "Разошлите коллегам ссылку на форму — заявки появятся здесь.") +
        "</span></div>";
      return;
    }
    table.style.display = "";
    empty.hidden = true;
    body.innerHTML = rows.map(function (r) {
      return '<tr data-id="' + r.id + '" tabindex="0" style="cursor:pointer">' +
        '<td><svg class="kt-icon kt-icon-sm" aria-hidden="true" style="color:var(--kt-ai-fg-faint)"><use href="#chevron-right"></use></svg></td>' +
        "<td data-label='Участник'><div class='cell-title'>" + esc(r.name) + "</div><div class='cell-sub'>" + esc(r.role) + "</div></td>" +
        "<td data-label='Контакты'>" + esc(r.email) + "<div class='cell-sub'>" + esc(r.phone) + "</div></td>" +
        "<td data-label='Филиал / должность'>" + esc(r.department || "—") + (r.position ? "<div class='cell-sub'>" + esc(r.position) + "</div>" : "") + "</td>" +
        "<td data-label='Сессия · Питание'>" + esc(r.track) + "<div class='cell-sub'>" + esc(r.food) + "</div></td>" +
        "<td data-label='Заявка' class='num'>" + fmtDate(r.createdAt) + "</td>" +
        "<td data-label='Статус'>" + statusPill(r.status) + "</td></tr>";
    }).join("");
  };

  function statusPill(s) {
    var m = { "Заявка": "info", "Подтверждена": "ok", "Отменена": "muted" };
    return '<span class="kt-ai-status-pill" data-status="' + (m[s] || "muted") + '"><span class="dot"></span>' + esc(s) + "</span>";
  }

  function renderKpi(rows) {
    var all = ALL || [];
    var total = all.length;
    var confirmed = all.filter(function (r) { return r.status === "Подтверждена"; }).length;
    var cancelled = all.filter(function (r) { return r.status === "Отменена"; }).length;
    var pending = total - confirmed - cancelled;
    var tracks = {};
    rows.forEach(function (r) { tracks[r.track] = (tracks[r.track] || 0) + 1; });
    var top = Object.keys(tracks).sort(function (a, b) { return tracks[b] - tracks[a]; })[0];
    var strip = document.getElementById("kpiStrip");
    strip.innerHTML =
      kpi(String(total), "всего заявок") +
      kpi(String(pending), "ждут подтверждения") +
      kpi(String(confirmed), "подтверждено") +
      (top ? kpi(String(tracks[top]), "мест: " + top) : "");
    renderConclusion(rows, total, confirmed);
  }
  function kpi(value, label) {
    return '<div class="kt-ai-kpi"><span class="value">' + esc(value) + '</span><span class="label">' + esc(label) + "</span></div>";
  }

  function renderConclusion(rows, total, confirmed) {
    var el = document.getElementById("conclusion");
    if (!total) { el.innerHTML = ""; return; }
    var cancelled = (ALL || []).filter(function (r) { return r.status === "Отменена"; }).length;
    el.innerHTML = '<div class="title">Состояние потоков</div><div class="text">' +
      "Всего заявок: " + total + ". Подтверждено: " + confirmed + "." +
      (cancelled ? " Отменено: " + cancelled + "." : "") +
      (rows.length === total ? " Фильтры не применены." : " По текущему фильтру: " + rows.length + ".") +
      " Данные обновляются после каждого действия — статусы меняются из карточки заявки, а список записей доступен во вкладке «Данные» с выгрузкой в Excel.</div>";
  }

  function exportCsv() {
    var rows = visible();
    if (!rows.length) { toast("Экспортировать нечего", "warn"); return; }
    var cols = ["id", "name", "email", "phone", "department", "position", "role", "track", "food", "status", "note", "createdAt"];
    var head = ["id", "ФИО", "Почта", "Телефон", "Филиал", "Должность", "Роль", "Сессия", "Питание", "Статус", "Примечание", "Заявка"];
    var lines = [head.join(",")].concat(rows.map(function (r) {
      return cols.map(function (c) {
        var v = r[c];
        v = v == null ? "" : String(v);
        return '"' + v.replace(/"/g, '""') + '"';
      }).join(",");
    }));
    var blob = new Blob(["\uFEFF" + lines.join("\n")], { type: "text/csv;charset=utf-8" });
    var a = document.createElement("a");
    a.href = URL.createObjectURL(blob);
    a.download = "registratsii-" + new Date().toISOString().slice(0, 10) + ".csv";
    document.body.appendChild(a);
    a.click();
    a.remove();
    toast("Таблица выгружена");
  }

  function closeDrawer() {
    document.getElementById("drawer").hidden = true;
  }

  document.getElementById("regBody").addEventListener("click", function (e) {
    var tr = e.target.closest("tr[data-id]");
    if (tr) openDrawer(Number(tr.getAttribute("data-id")));
  });
  document.getElementById("regBody").addEventListener("keydown", function (e) {
    if (e.key === "Enter") {
      var tr = e.target.closest("tr[data-id]");
      if (tr) openDrawer(Number(tr.getAttribute("data-id")));
    }
  });

  function openDrawer(id) {
    var r = (ALL || []).find(function (x) { return x.id === id; });
    if (!r) return;
    var d = document.getElementById("drawer");
    d.innerHTML =
      '<div class="drawer-head"><div class="t"><div class="kt-ai-h2" id="drawerTitle">' + esc(r.name) + "</div>" +
      statusPill(r.status) + '<div style="margin-top:6px;font-size:var(--kt-ai-text-xs);color:var(--kt-ai-fg-muted);z-index:0;position:relative">Заявка от ' + fmtDate(r.createdAt) + "</div></div>" +
      '<button class="kt-ai-icon-button" aria-label="Закрыть" id="drawerClose"><svg class="kt-icon" viewBox="0 0 24 24" aria-hidden="true"><path d="M18 6 6 18M6 6l12 12"/></svg></button></div>' +
      '<div class="drawer-sec">' + props(r) + "</div>" +
      '<div class="drawer-sec"><div class="kt-ai-h3" style="margin-bottom:var(--kt-ai-space-4)">Примечание</div>' +
      '<textarea class="kt-ai-textarea" id="drawerNote" rows="3" placeholder="Необязательно">' + esc(r.note || "") + "</textarea></div>" +
      '<div class="kt-ai-drawer-actions">' +
      '<button class="kt-ai-btn" data-variant="primary" data-act="Подтверждена" style="width:100%;justify-content:center;display:flex">Подтвердить участие</button>' +
      '<button class="kt-ai-btn" data-act="Отменена" style="width:100%;justify-content:center;display:flex">Отменить заявку</button>' +
      '<button class="kt-ai-btn" id="drawerSaveNote" style="width:100%;justify-content:center;display:flex">Сохранить примечание</button>' +
      "</div>";
    d.hidden = false;
    d.focus();
    d.querySelector("#drawerClose").addEventListener("click", closeDrawer);
    d.querySelectorAll("button[data-act]").forEach(function (b) {
      b.addEventListener("click", function () { changeStatus(id, b.getAttribute("data-act")); });
    });
    d.querySelector("#drawerSaveNote").addEventListener("click", function () { changeStatus(id, null, d.querySelector("#drawerNote").value); });
  }

  function props(r) {
    var items = [
      ["Почта", r.email], ["Телефон", r.phone],
      ["Филиал / подразделение", r.department], ["Должность", r.position],
      ["Роль", r.role], ["Сессия", r.track], ["Питание", r.food]
    ];
    return items.map(function (it) {
      return '<div class="kt-ai-prop"><span class="k">' + esc(it[0]) + '</span><span class="v" ' + (it[1] ? "" : 'data-empty="true"') + ">" + esc(it[1] || "—") + "</span></div>";
    }).join("");
  }

  window.addEventListener("hashchange", function () {
    if (location.hash === "#new") {
      location.replace("index.html");
    }
  });
  if (location.hash === "#new") location.replace("index.html");

  async function changeStatus(id, status, note) {
    try {
      var body = {};
      if (status) body.status = status;
      if (typeof note === "string") body.note = note;
      await api("registrations/" + id, {
        method: "PATCH",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify(body)
      });
      var r = (ALL || []).find(function (x) { return x.id === id; });
      if (r) {
        if (status) r.status = status;
        if (typeof note === "string") r.note = note;
      }
      closeDrawer();
      refreshTable();
      document.getElementById("navCount").textContent = ALL.length;
      toast(status ? ("Статус: " + status) : "Примечание сохранено", "ok");
    } catch (err) {
      toast(err.message, "risk");
    }
  }
})();