// ===============================
// GALLERY — Rendering + Filtri + Ordinamento
// ===============================

// ===============================
// 1. ORDINAMENTO
// ===============================
function sortByDate(photos, direction = "desc") {
  return photos.slice().sort((a, b) => {
    const da = a?.taken_at ? new Date(a.taken_at) : 0;
    const db = b?.taken_at ? new Date(b.taken_at) : 0;
    return direction === "asc" ? (da - db) : (db - da);
  });
}

// ===============================
// 2. FILTRI
// ===============================
function applyFilters(photos) {
  const filter = window.currentFilter;
  if (!filter) return photos;

  switch (filter) {
    case "folder":
      return photos.filter(p => p.cartella);

    case "location":
      return photos.filter(p => p?.gps?.lat && p?.gps?.lng);

    case "type":
      return photos.filter(p => p?.mime_type?.startsWith("image/"));

    default:
      return photos;
  }
}

// ===============================
// 3. RAGGRUPPAMENTO
// ===============================
function groupByDate(photos, mode = "auto") {
  const sections = [];
  const now = new Date();

  function getLabel(photo) {
    const date = photo?.taken_at ? new Date(photo.taken_at) : null;
    if (!date || isNaN(+date)) return "Senza data";

    const diffDays = Math.floor((now - date) / 86400000);

    if (mode === "day")   return formatDay(date);
    if (mode === "month") return formatMonth(date);
    if (mode === "year")  return String(date.getFullYear());

    if (diffDays === 0)  return "Oggi";
    if (diffDays === 1)  return "Ieri";
    if (diffDays <= 7)   return "Questa settimana";
    if (diffDays <= 14)  return "La settimana scorsa";
    if (diffDays <= 30)  return "Questo mese";
    if (diffDays <= 60)  return "Mese scorso";

    if (date.getFullYear() === now.getFullYear()) return formatMonth(date);
    return String(date.getFullYear());
  }

  for (const photo of photos) {
    const label = getLabel(photo);
    let section = sections.find(s => s.label === label);
    if (!section) {
      section = { label, photos: [] };
      sections.push(section);
    }
    section.photos.push(photo);
  }

  return sections;
}

// ===============================
// 4. FORMATTATORI
// ===============================
function formatDay(date) {
  return date.toLocaleDateString("it-IT", {
    weekday: "long",
    day: "numeric",
    month: "long"
  });
}

function formatMonth(date) {
  return date.toLocaleDateString("it-IT", {
    month: "long",
    year: "numeric"
  });
}

// ===============================
// 5. RENDER GALLERY
// ===============================
function renderGallery(sections) {
  const gallery = document.getElementById("gallery");
  if (!gallery) return;

  gallery.innerHTML = "";

  for (const section of sections) {
    const h = document.createElement("h2");
    h.className = "gallery-section-title";
    h.textContent = section.label;
    gallery.appendChild(h);

    const container = document.createElement("div");
    container.className = "gallery-section";

    section.photos.forEach((photo, idx) => {
      const thumbDiv = document.createElement("div");
      thumbDiv.className = "thumb";
      thumbDiv.id = "photo_" + photo.id;
      
      // 🔥 NUOVO: se soft-deleted → aggiungi classe
      if (photo.deleted_at) {
        thumbDiv.classList.add("soft-deleted");
      }


      const thumb = toAbsoluteUrl(
        photo.thub2 || photo.thub1 || photo.path,
        photo.name,
        "thumbs",
        photo.cartella
      );

      const original = toAbsoluteUrl(
        photo.path,
        photo.name,
        "original",
        photo.cartella
      );

      const img = document.createElement("img");
      img.src = thumb;
      img.alt = photo?.name || "";
      img.loading = "lazy";
      thumbDiv.appendChild(img);

      if (photo?.mime_type?.startsWith("video/")) {
        const play = document.createElement("div");
        play.className = "play-icon";
        play.textContent = "▶";
        thumbDiv.appendChild(play);
      }

      thumbDiv.addEventListener("click", () => {
        window.closeBottomSheet?.();

        if (typeof window.openModalFromList === "function") {
          window.openModalFromList(section.photos, idx);
        } else {
          window.openModal?.(original, thumb, photo);
        }
      });

      container.appendChild(thumbDiv);
    });

    gallery.appendChild(container);
  }
}

// ===============================
// 6. REFRESH GALLERY
// ===============================
function refreshGallery() {
  let photos = getLocalPhotos();
  console.log("[refreshGallery] numero foto:", photos.length);

  // 🔥 NUOVO: flag per mostrare i soft delete
  const showDeleted = document.getElementById("showDeleted")?.checked;

  if (!showDeleted) {
    photos = photos.filter(p => !p.deleted_at);
  }

  const filtered = applyFilters(photos);
  const sorted = sortByDate(filtered, window.currentSort || "desc");
  const sections = groupByDate(sorted, window.currentGroup || "auto");

  renderGallery(sections);
}

// EXPORT
window.sortByDate = sortByDate;
window.applyFilters = applyFilters;
window.groupByDate = groupByDate;
window.renderGallery = renderGallery;
window.refreshGallery = refreshGallery;

// ===============================
// TOGGLE "MOSTRA ELIMINATE"
// ===============================
window.addEventListener("DOMContentLoaded", () => {
  const checkbox = document.getElementById("showDeleted");
  if (!checkbox) return;

  // Ripristina stato salvato
  const saved = localStorage.getItem("showDeleted") === "1";
  checkbox.checked = saved;

  // Rinfresca la gallery al primo avvio
  refreshGallery();

  // Salva e aggiorna quando cambia
  checkbox.addEventListener("change", () => {
    localStorage.setItem("showDeleted", checkbox.checked ? "1" : "0");
    refreshGallery();
  });
});