/*
  ضع رابط Web App الناتج من Google Apps Script هنا فقط.
  مثال:
  const API_URL = "https://script.google.com/macros/s/XXXXX/exec";
*/
const API_URL = "https://script.google.com/macros/s/AKfycbzP3FbtCu3u5PitxRyxm1f1fiIU7UWuoEvcco3oK_MlTLFhlA0D13RgTK_V8e9TXOI/exec";

const $ = (id) => document.getElementById(id);
let allTasks = [];
let selectedDates = [];


function sortDates(list) {
  return [...new Set(list)].sort((a,b) => a.localeCompare(b));
}

function renderSelectedDates() {
  const box = $("selectedDates");
  const addBtn = $("addDateBtn");
  if (addBtn) addBtn.textContent = selectedDates.length ? `+ إضافة تاريخ آخر (${selectedDates.length})` : "+ إضافة التاريخ";
  if (!selectedDates.length) {
    box.innerHTML = `<span class="selected-date-label">لم تتم إضافة أي تواريخ بعد</span>`;
    return;
  }
  box.innerHTML = selectedDates.map(date => `
    <span class="date-chip">
      📅 ${escapeHTML(formatArabicDate(date, true))}
      <button type="button" data-remove-date="${escapeHTML(date)}" aria-label="حذف التاريخ">×</button>
    </span>
  `).join("");
}

function addCurrentDate() {
  const date = $("taskDate").value;
  if (!date) return toast("اختر التاريخ أولًا", true);
  if (selectedDates.includes(date)) return toast("هذا التاريخ مضاف بالفعل", true);
  selectedDates = sortDates([...selectedDates, date]);
  renderSelectedDates();
}

function localISODate(d = new Date()) {
  const y = d.getFullYear();
  const m = String(d.getMonth() + 1).padStart(2, "0");
  const day = String(d.getDate()).padStart(2, "0");
  return `${y}-${m}-${day}`;
}

function formatArabicDate(value, withWeekday = false) {
  if (!value) return "—";
  const d = new Date(`${value}T12:00:00`);
  if (Number.isNaN(d.getTime())) return value;
  return new Intl.DateTimeFormat("ar-SA-u-ca-gregory", {
    weekday: withWeekday ? "long" : undefined,
    day: "numeric",
    month: "long",
    year: "numeric"
  }).format(d);
}


function dayDateLabel(value) {
  if (!value) return "—";
  const d = new Date(`${value}T12:00:00`);
  if (Number.isNaN(d.getTime())) return value;
  return "📅 " + new Intl.DateTimeFormat("ar-SA-u-ca-gregory", {
    weekday:"long", day:"numeric", month:"long", year:"numeric"
  }).format(d);
}

function updateSelectedDateLabels() {
  const singleLabel = $("selectedDateLabel");
  if (singleLabel && $("taskDate")) {
    singleLabel.textContent = dayDateLabel($("taskDate").value);
  }
  if ($("editDate") && $("editDateLabel")) {
    $("editDateLabel").textContent = dayDateLabel($("editDate").value);
  }
}

function escapeHTML(str = "") {
  return String(str).replace(/[&<>"']/g, c => ({
    "&":"&amp;","<":"&lt;",">":"&gt;",'"':"&quot;","'":"&#039;"
  }[c]));
}

function toast(message, isError = false) {
  const el = $("toast");
  el.textContent = message;
  el.className = `toast show${isError ? " error" : ""}`;
  clearTimeout(toast.timer);
  toast.timer = setTimeout(() => el.className = "toast", 3200);
}

function apiReady() {
  return API_URL && !API_URL.includes("PUT_YOUR_");
}

async function apiRequest(payload) {
  if (!apiReady()) throw new Error("لم يتم وضع رابط Google Apps Script داخل script.js");
  const res = await fetch(API_URL, {
    method: "POST",
    headers: {"Content-Type":"text/plain;charset=utf-8"},
    body: JSON.stringify({...payload, _ts: Date.now()}),
    redirect: "follow"
  });
  if (!res.ok) throw new Error("تعذر الاتصال بالخادم");
  const data = await res.json();
  if (!data.ok) throw new Error(data.message || "حدث خطأ");
  return data;
}

async function loadTasks() {
  $("statusBox").hidden = false;
  $("statusBox").textContent = "جاري تحميل المهام...";
  $("taskList").hidden = true;
  $("emptyState").hidden = true;

  try {
    const data = await apiRequest({action:"list"});
    allTasks = Array.isArray(data.tasks) ? data.tasks : [];
    updateDepartments();
    updateStats();
    renderTasks();
    $("lastUpdated").textContent = `آخر تحديث: ${new Intl.DateTimeFormat("ar-SA-u-ca-gregory",{hour:"numeric",minute:"2-digit"}).format(new Date())}`;
  } catch (err) {
    $("statusBox").hidden = false;
    $("statusBox").textContent = err.message;
    toast(err.message, true);
  }
}

function updateStats() {
  const today = localISODate();
  $("totalCount").textContent = allTasks.length;
  $("todayCount").textContent = allTasks.filter(t => t.date === today).length;
  $("deptCount").textContent = new Set(allTasks.map(t => (t.department || "").trim()).filter(Boolean)).size;
}

function updateDepartments() {
  const current = $("filterDept").value;
  const depts = [...new Set(allTasks.map(t => (t.department || "").trim()).filter(Boolean))]
    .sort((a,b)=>a.localeCompare(b,"ar"));
  $("filterDept").innerHTML = `<option value="">جميع الأقسام</option>` +
    depts.map(d => `<option value="${escapeHTML(d)}">${escapeHTML(d)}</option>`).join("");
  if (depts.includes(current)) $("filterDept").value = current;
}

function filteredTasks() {
  const q = $("searchInput").value.trim().toLowerCase();
  const date = $("filterDate").value;
  const dept = $("filterDept").value;
  return allTasks.filter(t => {
    const hay = `${t.task || ""} ${t.department || ""}`.toLowerCase();
    return (!q || hay.includes(q)) &&
           (!date || t.date === date) &&
           (!dept || t.department === dept);
  });
}

function renderTasks() {
  const tasks = filteredTasks();
  $("statusBox").hidden = true;

  if (!tasks.length) {
    $("taskList").hidden = true;
    $("emptyState").hidden = false;
    return;
  }

  $("emptyState").hidden = true;
  $("taskList").hidden = false;
  $("taskList").innerHTML = tasks.map(t => {
    const d = new Date(`${t.date}T12:00:00`);
    const day = Number.isNaN(d.getTime()) ? "" : new Intl.DateTimeFormat("ar-SA-u-ca-gregory",{day:"numeric"}).format(d);
    const month = Number.isNaN(d.getTime()) ? "" : new Intl.DateTimeFormat("ar-SA-u-ca-gregory",{month:"long"}).format(d);
    const weekday = Number.isNaN(d.getTime()) ? "" : new Intl.DateTimeFormat("ar-SA-u-ca-gregory",{weekday:"long"}).format(d);
    return `
      <article class="task-card">
        <div class="task-date">
          <strong>📅 ${escapeHTML(weekday)}</strong>
          <span>${escapeHTML(day)} ${escapeHTML(month)} • ${escapeHTML(t.date || "")}</span>
        </div>
        <div class="task-body">
          <h3>${escapeHTML(t.task || "")}</h3>
          <p>تم تسجيل المهمة ضمن سجل الإنجازات</p>
        </div>
        <div class="task-meta-side">
          <span class="dept-badge">${escapeHTML(t.department || "بدون قسم")}</span>
          ${t.status ? `<span class="status-badge ${t.status === "تم الإنجاز" ? "status-done" : t.status === "جاري العمل" ? "status-progress" : "status-planned"}">${escapeHTML(t.status)}</span>` : ""}
          <div class="quick-status">
            <button type="button" class="${t.status === "تم الإنجاز" ? "is-selected" : ""}" data-status-row="${t.row}" data-status-value="تم الإنجاز">✓ تم الإنجاز</button>
            <button type="button" class="${t.status === "جاري العمل" ? "is-selected" : ""}" data-status-row="${t.row}" data-status-value="جاري العمل">◷ جاري العمل</button>
            <button type="button" class="${t.status === "مخطط لها" ? "is-selected" : ""}" data-status-row="${t.row}" data-status-value="مخطط لها">○ مخطط لها</button>
            <button type="button" class="${!t.status ? "is-selected" : ""}" data-status-row="${t.row}" data-status-value="">— بدون حالة</button>
          </div>
          <div class="task-actions">
            <button class="action-btn edit-btn" type="button" data-edit-row="${t.row}">تعديل</button>
            <button class="action-btn delete-btn" type="button" data-delete-row="${t.row}">حذف</button>
          </div>
        </div>
      </article>`;
  }).join("");
}

async function saveTask(e) {
  e.preventDefault();
  const task = $("taskText").value.trim();
  const department = $("taskDept").value.trim();

  // إذا اختار المستخدم تاريخًا ولم يضغط "إضافة التاريخ"، نضيفه تلقائيًا.
  let dates = [...selectedDates];
  const currentDate = $("taskDate").value;
  if (currentDate && !dates.includes(currentDate)) dates.push(currentDate);
  dates = sortDates(dates);

  if (!dates.length || !task || !department) return toast("أكمل التاريخ والمهمة والقسم", true);

  const btn = $("saveBtn");
  btn.disabled = true;
  $("saveBtnText").textContent = dates.length > 1 ? `جاري حفظ ${dates.length} تواريخ...` : "جاري الحفظ...";

  try {
    for (const date of dates) {
      await apiRequest({action:"add", date, task, department});
    }
    toast(dates.length > 1 ? `تم تسجيل المهمة في ${dates.length} تواريخ ✓` : "تم تسجيل المهمة بنجاح ✓");
    $("taskText").value = "";
    $("charCount").textContent = "0";
    selectedDates = [];
    $("taskDate").value = localISODate();
    renderSelectedDates();
    updateSelectedDateLabels();
    await loadTasks();
  } catch (err) {
    toast(err.message, true);
  } finally {
    btn.disabled = false;
    $("saveBtnText").textContent = "حفظ المهمة";
  }
}


function taskByRow(row) {
  return allTasks.find(t => Number(t.row) === Number(row));
}

function openEdit(row) {
  const t = taskByRow(row);
  if (!t) return;
  $("editRow").value = t.row;
  $("editDate").value = t.date || "";
  $("editDept").value = t.department || "";
  $("editText").value = t.task || "";
  updateSelectedDateLabels();
  $("editModal").hidden = false;
  document.body.style.overflow = "hidden";
}

function closeEdit() {
  $("editModal").hidden = true;
  document.body.style.overflow = "";
}

async function updateTask(e) {
  e.preventDefault();
  const btn = $("editSaveBtn");
  btn.disabled = true;
  btn.textContent = "جاري الحفظ...";
  try {
    await apiRequest({
      action:"update",
      row:Number($("editRow").value),
      date:$("editDate").value,
      task:$("editText").value.trim(),
      department:$("editDept").value,
      status:(taskByRow(Number($("editRow").value)) || {}).status || ""
    });
    closeEdit();
    toast("تم تعديل المهمة بنجاح ✓");
    await loadTasks();
  } catch (err) {
    toast(err.message, true);
  } finally {
    btn.disabled = false;
    btn.textContent = "حفظ التعديل";
  }
}

async function updateStatus(row, status) {
  const t = taskByRow(row);
  if (!t) return;
  try {
    await apiRequest({
      action:"update",
      row:Number(row),
      date:t.date,
      task:t.task,
      department:t.department || "",
      status:status || ""
    });
    toast(status ? `تم تحديث الحالة إلى: ${status}` : "تم إزالة الحالة");
    await loadTasks();
  } catch (err) {
    toast(err.message, true);
  }
}

async function deleteTask(row) {
  const t = taskByRow(row);
  if (!t) return;
  if (!confirm(`هل تريد حذف المهمة: "${t.task}"؟`)) return;
  try {
    await apiRequest({action:"delete", row:Number(row)});
    toast("تم حذف المهمة");
    await loadTasks();
  } catch (err) {
    toast(err.message, true);
  }
}


document.addEventListener("DOMContentLoaded", () => {
  $("taskDate").value = localISODate();
  $("todayText").textContent = "📅 " + formatArabicDate(localISODate(), true);
  selectedDates = [localISODate()];
  try { renderSelectedDates(); } catch (e) { console.warn(e); }
  try { updateSelectedDateLabels(); } catch (e) { console.warn(e); }

  // تحميل السجل مبكرًا وبشكل مستقل حتى تظهر المهام السابقة دائمًا
  loadTasks();

  if ($("entryToggle") && $("entryPanel")) {
    $("entryToggle").addEventListener("click", () => {
      const panel = $("entryPanel");
      const willOpen = panel.hidden;
      panel.hidden = !willOpen;
      $("entryToggle").setAttribute("aria-expanded", String(willOpen));
      $("entryToggle").classList.toggle("is-open", willOpen);
      const hint = $("entryToggle").querySelector("p");
      if (hint) hint.textContent = willOpen
        ? "اضغط هنا لإخفاء منطقة إدخال المهام."
        : "اضغط هنا لإظهار منطقة إدخال المهام.";
      if (willOpen) setTimeout(() => panel.scrollIntoView({behavior:"smooth", block:"start"}), 50);
    });
  }

  $("taskForm").addEventListener("submit", saveTask);
  $("taskDate").addEventListener("change", updateSelectedDateLabels);
  if ($("addDateBtn")) $("addDateBtn").addEventListener("click", addCurrentDate);
  if ($("selectedDates")) $("selectedDates").addEventListener("click", e => {
    const btn = e.target.closest("[data-remove-date]");
    if (!btn) return;
    selectedDates = selectedDates.filter(d => d !== btn.dataset.removeDate);
    renderSelectedDates();
  });
  $("editDate").addEventListener("change", updateSelectedDateLabels);
  $("editForm").addEventListener("submit", updateTask);
  document.querySelectorAll("[data-close-modal]").forEach(el => el.addEventListener("click", closeEdit));
  $("taskList").addEventListener("click", e => {
    const edit = e.target.closest("[data-edit-row]");
    const del = e.target.closest("[data-delete-row]");
    const status = e.target.closest("[data-status-row]");
    if (status) return updateStatus(status.dataset.statusRow, status.dataset.statusValue);
    if (edit) openEdit(edit.dataset.editRow);
    if (del) deleteTask(del.dataset.deleteRow);
  });
  $("taskText").addEventListener("input", e => $("charCount").textContent = e.target.value.length);
  $("refreshBtn").addEventListener("click", loadTasks);
  $("searchInput").addEventListener("input", renderTasks);
  $("filterDate").addEventListener("change", renderTasks);
  $("filterDept").addEventListener("change", renderTasks);
  $("clearFilters").addEventListener("click", () => {
    $("searchInput").value = "";
    $("filterDate").value = "";
    $("filterDept").value = "";
    renderTasks();
  });
  $("taskForm").addEventListener("reset", () => {
    setTimeout(() => {
      $("taskDate").value = localISODate();
      $("charCount").textContent = "0";
      selectedDates = [localISODate()];
      renderSelectedDates();
      updateSelectedDateLabels();
    }, 0);
  });

});