/**
 * file-upload-queue.js
 *
 * Renders visual file queues for:
 *   1. #tfe-files-input  — multi-file upload with drag-to-reorder (SortableJS)
 *      and per-file label inputs. Injects hidden file_labels[] / file_orders[].
 *   2. input[data-preview] — single-file previews (couverture, note_intention, etc.)
 *   3. #existing-files-sortable — edit-mode sortable list
 *
 * Exposes window.XamxamInitFileUploads() so HTMX fragments can re-bind
 * after swap without a global event listener.
 */
window.XamxamInitFileUploads = function () {
	console.log("[file-upload-queue] XamxamInitFileUploads called");
	var ICON = {
		pdf: "\uD83D\uDCC4",
		video: "\uD83C\uDFAC",
		audio: "\uD83D\uDD0A",
		zip: "\uD83D\uDDDC\uFE0F",
		vtt: "\uD83D\uDCAC",
		image: "\uD83D\uDDBC\uFE0F",
		other: "\uD83D\uDCCE",
	};

	function iconFor(file) {
		var t = file.type || "",
			n = file.name.toLowerCase();
		if (/^image\//.test(t)) return ICON.image;
		if (t === "application/pdf" || /\.pdf$/.test(n)) return ICON.pdf;
		if (/^video\//.test(t) || /\.(mp4|webm|mov|ogv)$/.test(n))
			return ICON.video;
		if (/^audio\//.test(t) || /\.(mp3|ogg|oga|wav|flac|aac|m4a)$/.test(n))
			return ICON.audio;
		if (/\.(zip|tar|gz|tgz)$/.test(n)) return ICON.zip;
		if (/\.vtt$/.test(n)) return ICON.vtt;
		return ICON.other;
	}

	function humanSize(b) {
		return b >= 1073741824
			? (b / 1073741824).toFixed(2) + " GB"
			: b >= 1048576
				? (b / 1048576).toFixed(2) + " MB"
				: b >= 1024
					? (b / 1024).toFixed(1) + " KB"
					: b + " B";
	}

	function esc(s) {
		return s.replace(/[&<>"]/g, function (c) {
			return { "&": "&amp;", "<": "&lt;", ">": "&gt;", '"': "&quot;" }[c];
		});
	}

	// ── 1. TFE multi-file queue ────────────────────────────────────────────
	var picker = document.getElementById("tfe-files-input");
	var queue = document.getElementById("tfe-file-queue");
	var empty = document.getElementById("tfe-file-queue-empty");
	var sortHint = document.getElementById("tfe-file-queue-sort-hint");
	if (picker && queue) {
		console.log(
			"[file-upload-queue] init TFE queue picker=",
			picker,
			"multiple=",
			picker.multiple,
		);
		var fileArray = [];

		if (typeof Sortable !== "undefined") {
			Sortable.create(queue, {
				animation: 150,
				handle: ".fq-drag-handle",
				ghostClass: "fq-ghost",
				onEnd: function () {
					var items = queue.querySelectorAll(".fq-item");
					var newArr = Array.prototype.map.call(items, function (li) {
						return fileArray[parseInt(li.getAttribute("data-idx"), 10)];
					});
					fileArray = newArr;
					renderQueue();
				},
			});
		}

		picker.onchange = function () {
			console.log(
				"[file-upload-queue] onchange fired, files count:",
				picker.files.length,
				"names:",
				Array.from(picker.files).map(function (f) {
					return f.name;
				}),
			);
			fileArray = fileArray.concat(Array.from(picker.files));
			console.log(
				"[file-upload-queue] fileArray after concat, length:",
				fileArray.length,
			);
			picker.value = "";
			renderQueue();
		};

		function renderQueue() {
			queue.innerHTML = "";
			if (!fileArray.length) {
				empty.style.display = "";
				if (sortHint) sortHint.style.display = "none";
				injectHiddenFields([]);
				return;
			}
			empty.style.display = "none";
			if (sortHint) sortHint.style.display = "";
			fileArray.forEach(function (file, idx) {
				var li = document.createElement("li");
				li.className = "fq-item";
				li.setAttribute("data-idx", idx);
				li.innerHTML =
					'<span class="fq-drag-handle" title="R\u00e9ordonner">\u2820</span>' +
					'<span class="fq-icon">' +
					iconFor(file) +
					"</span>" +
					'<span class="fq-info"><span class="fq-name">' +
					esc(file.name) +
					"</span>" +
					'<span class="fq-size">' +
					humanSize(file.size) +
					"</span></span>" +
					'<button type="button" class="admin-btn-remove fq-remove" aria-label="Retirer ' +
					esc(file.name) +
					'">&#x2715;</button>';
				li.querySelector(".fq-remove").onclick = (function (i) {
					return function () {
						fileArray.splice(i, 1);
						renderQueue();
					};
				})(idx);
				queue.appendChild(li);
			});
			injectHiddenFields(Array.from(queue.querySelectorAll(".fq-item")));
		}

		function injectHiddenFields(items) {
			var form = picker.closest("form");
			if (!form) return;
			form
				.querySelectorAll(".fq-hidden-label, .fq-hidden-order")
				.forEach(function (el) {
					el.remove();
				});
			items.forEach(function (li, sortedIdx) {
				var label = li.querySelector(".fq-label");
				var lInp = document.createElement("input");
				lInp.type = "hidden";
				lInp.name = "file_labels[]";
				lInp.value = label ? label.value : "";
				lInp.className = "fq-hidden-label";
				form.appendChild(lInp);
				var oInp = document.createElement("input");
				oInp.type = "hidden";
				oInp.name = "file_orders[]";
				oInp.value = sortedIdx + 1;
				oInp.className = "fq-hidden-order";
				form.appendChild(oInp);
			});
		}

		// On submit, refresh hidden fields from current queue state
		var form = picker.closest("form");
		if (form)
			form.addEventListener("submit", function () {
				injectHiddenFields(Array.from(queue.querySelectorAll(".fq-item")));
			});
	}

	// ── 2. Single-file previews (data-preview attribute) ────────────────────
	document
		.querySelectorAll('input[type="file"][data-preview]')
		.forEach(function (input) {
			if (input.id === "tfe-files-input") return;
			console.log(
				"[file-upload-queue] binding preview for",
				input.id,
				"multiple=",
				input.multiple,
			);
			var container = document.getElementById(
				input.getAttribute("data-preview"),
			);
			if (!container) return;
			input.onchange = function () {
				container.innerHTML = "";
				Array.from(input.files).forEach(function (file) {
					var item = document.createElement("div");
					item.className = "fp-item";
					if (/^image\//.test(file.type)) {
						var img = document.createElement("img");
						img.className = "fp-thumb";
						img.alt = file.name;
						var reader = new FileReader();
						reader.onload = function (e) {
							img.src = e.target.result;
						};
						reader.readAsDataURL(file);
						item.appendChild(img);
					} else {
						var ic = document.createElement("span");
						ic.className = "fp-icon";
						ic.textContent = iconFor(file);
						item.appendChild(ic);
					}
					var meta = document.createElement("span");
					meta.className = "fp-meta";
					meta.innerHTML =
						'<span class="fp-name">' +
						esc(file.name) +
						'</span><span class="fp-size">' +
						humanSize(file.size) +
						"</span>";
					item.appendChild(meta);
					container.appendChild(item);
				});
			};
		});

	// ── 3. Existing-files sortable (edit mode) ──────────────────────────────
	var sortList = document.getElementById("existing-files-sortable");
	if (sortList && typeof Sortable !== "undefined") {
		Sortable.create(sortList, {
			animation: 150,
			handle: ".admin-file-drag-handle",
			ghostClass: "fq-ghost",
			onEnd: function () {
				sortList
					.querySelectorAll('input[name="file_sort_order[]"]')
					.forEach(function (el) {
						el.remove();
					});
				sortList
					.querySelectorAll(".admin-file-list-item[data-file-id]")
					.forEach(function (li) {
						var inp = document.createElement("input");
						inp.type = "hidden";
						inp.name = "file_sort_order[]";
						inp.value = li.getAttribute("data-file-id");
						li.prepend(inp);
					});
			},
		});
	}
};

// Bootstrap on page load
if (document.readyState === "loading")
	document.addEventListener("DOMContentLoaded", window.XamxamInitFileUploads);
else window.XamxamInitFileUploads();