import {
  login,
  register,
  getLinks,
  createLink,
  deleteLink,
  updateLink
} from "./api.js";

const URL_SVR = "https://myapps_svr.patachina2.casacam.net";

let token = null;
let autoIconURL = null;
let editingId = null;

// ===============================
// MOSTRA DIMENSIONI IMMAGINE
// ===============================
function showImageSize(imgElement, sizeElement) {
  const img = new Image();
  img.onload = () => {
    sizeElement.textContent = `${img.width} × ${img.height} px`;
    sizeElement.style.display = "block";
  };
  img.src = imgElement.src;
}

// ===============================
// AUTH
// ===============================
function setToken(t) {
  token = t;
  document.getElementById("authSection").style.display = token ? "none" : "block";
  document.getElementById("linkSection").style.display = token ? "block" : "none";
  if (token) loadLinks();
}

document.getElementById("loginForm").addEventListener("submit", async e => {
  e.preventDefault();
  try {
    const t = await login(e.target.email.value, e.target.password.value);
    setToken(t);
  } catch (err) {
    document.getElementById("authStatus").textContent = err.message;
  }
});

document.getElementById("registerForm").addEventListener("submit", async e => {
  e.preventDefault();
  try {
    await register(e.target.email.value, e.target.password.value);
    document.getElementById("authStatus").textContent = "Registrato! Ora accedi.";
  } catch (err) {
    document.getElementById("authStatus").textContent = err.message;
  }
});

// ===============================
// LOAD LINKS
// ===============================
async function loadLinks() {
  const links = await getLinks(token);
  const list = document.getElementById("list");

  list.innerHTML = links
    .map(
      link => `
      <div class="item" data-id="${link._id}">
        ${link.icon ? `<img src="${URL_SVR}${link.icon}">` : ""}
        <div class="info">
          <strong>${link.name}</strong><br>
          <a href="${link.url}" target="_blank">${link.url}</a>
        </div>
        <div class="actions">
          <button class="editBtn" data-id="${link._id}">Modifica</button>
          <button class="deleteBtn" data-id="${link._id}">Elimina</button>
        </div>
      </div>
    `
    )
    .join("");
}

// ===============================
// METADATA (icona automatica)
// ===============================
document.getElementById("fetchMetaBtn").addEventListener("click", async () => {
  const url = document.getElementById("urlInput").value.trim();
  if (!url) return;

  const res = await fetch(`${URL_SVR}/metadata?url=${encodeURIComponent(url)}`);
  const data = await res.json();

  document.getElementById("nameInput").value = data.name || "";
  autoIconURL = data.icon || null;

  // L’icona automatica è l’ultima scelta → reset input manuale
  const fileInput = document.getElementById("iconInput");
  fileInput.value = "";

  const preview = document.getElementById("iconPreview");
  const sizeBox = document.getElementById("iconSize");

  if (autoIconURL) {
    preview.src = autoIconURL;
    preview.style.display = "block";
    sizeBox.style.display = "none";
    showImageSize(preview, sizeBox);
  }
});

// ===============================
// ANTEPRIMA ICONA MANUALE
// ===============================
document.getElementById("iconInput").addEventListener("change", e => {
  const file = e.target.files[0];
  if (!file) return;

  autoIconURL = null; // manuale vince

  const preview = document.getElementById("iconPreview");
  const sizeBox = document.getElementById("iconSize");

  preview.src = URL.createObjectURL(file);
  preview.style.display = "block";
  sizeBox.style.display = "none";

  showImageSize(preview, sizeBox);
});

// ===============================
// CREAZIONE LINK
// ===============================
document.getElementById("linkForm").addEventListener("submit", async e => {
  e.preventDefault();

  const raw = new FormData(e.target);
  const manualFile = raw.get("icon");
  const hasManualFile = manualFile instanceof File && manualFile.size > 0;

  await createLink(token, {
    name: raw.get("name"),
    url: raw.get("url"),
    iconFile: hasManualFile ? manualFile : null,
    iconURL: !hasManualFile ? autoIconURL : null
  });

  autoIconURL = null;
  document.getElementById("iconPreview").style.display = "none";
  document.getElementById("iconSize").style.display = "none";

  e.target.reset();
  loadLinks();
});

// ===============================
// EDIT
// ===============================
document.getElementById("list").addEventListener("click", e => {
  const id = e.target.dataset.id;
  if (!id) return;

  if (e.target.classList.contains("deleteBtn")) {
    deleteLink(token, id).then(loadLinks);
    return;
  }

  if (e.target.classList.contains("editBtn")) {
    editingId = id;

    const item = e.target.closest(".item");
    const name = item.querySelector("strong").textContent;
    const url = item.querySelector("a").textContent;

    const form = document.getElementById("editForm");
    form.name.value = name;
    form.url.value = url;

    document.getElementById("iconPreviewEdit").style.display = "none";
    document.getElementById("iconSizeEdit").style.display = "none";

    document.getElementById("editModal").style.display = "flex";
  }
});

// ANTEPRIMA MANUALE IN EDIT
document.getElementById("iconInputEdit").addEventListener("change", e => {
  const file = e.target.files[0];
  if (!file) return;

  const preview = document.getElementById("iconPreviewEdit");
  const sizeBox = document.getElementById("iconSizeEdit");

  preview.src = URL.createObjectURL(file);
  preview.style.display = "block";
  sizeBox.style.display = "none";

  showImageSize(preview, sizeBox);
});

// SALVA EDIT
document.getElementById("editForm").addEventListener("submit", async e => {
  e.preventDefault();

  const name = e.target.name.value;
  const url = e.target.url.value;
  const iconFile = e.target.icon.files[0] || null;

  await updateLink(token, editingId, {
    name,
    url,
    iconFile,
    iconURL: null
  });

  document.getElementById("editModal").style.display = "none";
  loadLinks();
});

document.getElementById("closeModal").addEventListener("click", () => {
  document.getElementById("editModal").style.display = "none";
});

setToken(null);