/**
 * file-upload-queue.js
 *
 * Provides single-file previews for file inputs with the data-preview attribute
 * (couverture, note_intention, annexes, etc.).
 *
 * The multi-file TFE queue is rendered server-side via HTMX fragments
 * (upload-tfe-file.php / remove-tfe-file.php).
 *
 * 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];
		});
	}

	// ── 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);
				});
			};
		});
};

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