{{ $model := . }}

<file-uploader
	class="block"
	data-upload-url="/redaktion/files/upload/"
	data-list-url="/redaktion/files/list/"
	data-delete-url="/redaktion/files/delete/"
	data-csrf="{{ $model.csrf_token }}">
	<button type="button" class="w-full flex items-center justify-between rounded-md border border-slate-300 bg-white px-4 py-3 text-lg font-semibold text-slate-900 hover:bg-slate-50" data-role="collapse-toggle">
		<span>Dateien</span>
		<i class="ri-arrow-down-s-line transition-transform" data-role="collapse-icon"></i>
	</button>

	<div class="mt-4 hidden" data-role="collapse-panel">
		<div class="flex items-center justify-between gap-4">
			<div>
				<h2 class="text-lg font-semibold text-slate-900">Dateien</h2>
				<p class="text-sm text-slate-600 mt-1">
					Dateien sind öffentlich erreichbar. Verwenden Sie den Link in den Seiteninhalten.
				</p>
			</div>
			<button type="button" class="inline-flex items-center gap-2 rounded-md border border-slate-300 bg-white px-3 py-2 text-sm font-semibold text-slate-700 hover:bg-slate-50" data-role="toggle-upload">
				<i class="ri-add-line"></i> Datei hinzufügen
			</button>
		</div>

		<div class="mt-4 hidden grid grid-cols-1 md:grid-cols-12 gap-3 items-end" data-role="upload-form">
		<div class="md:col-span-4 flex flex-col gap-1">
			<label class="text-xs font-semibold uppercase tracking-wide text-slate-500">Datei</label>
			<div class="border border-slate-300 rounded-md px-3 py-2 text-sm text-slate-600 bg-white min-h-[2.5rem] flex items-center"
				data-role="dropzone">
				<div class="flex items-center justify-between gap-3 w-full">
					<span data-role="dropzone-text">Datei hier ablegen oder auswählen</span>
					<button type="button" class="text-sm font-semibold text-slate-700 hover:text-slate-900" data-role="choose-button">Auswählen</button>
				</div>
				<input type="file" class="hidden" data-role="file-input" />
			</div>
		</div>
		<div class="md:col-span-3 flex flex-col gap-1">
			<label class="text-xs font-semibold uppercase tracking-wide text-slate-500">Titel</label>
			<input type="text" class="block w-full rounded-md border border-slate-300 bg-white px-3 py-2 text-sm text-slate-900 focus:border-slate-500 focus:ring-2 focus:ring-slate-400/30 min-h-[2.5rem]" placeholder="(Optional, sonst Dateiname)" data-role="title-input" autocomplete="off" />
		</div>
		<div class="md:col-span-4 flex flex-col gap-1">
			<label class="text-xs font-semibold uppercase tracking-wide text-slate-500">Beschreibung</label>
			<input type="text" class="block w-full rounded-md border border-slate-300 bg-white px-3 py-2 text-sm text-slate-900 focus:border-slate-500 focus:ring-2 focus:ring-slate-400/30 min-h-[2.5rem]" data-role="description-input" autocomplete="off" />
		</div>
		<div class="md:col-span-1 flex items-center">
			<tool-tip position="top" class="inline-block w-full">
				<button type="button" class="w-full inline-flex items-center justify-center gap-2 rounded-md bg-slate-900 px-3 py-2 text-sm font-semibold text-white shadow-sm hover:bg-slate-800 focus:outline-none focus:ring-2 focus:ring-slate-400/50 disabled:opacity-60" data-role="upload-button">
					<i class="ri-upload-2-line"></i>
				</button>
				<div class="data-tip">Datei hochladen</div>
			</tool-tip>
		</div>
		<div class="md:col-span-12">
			<span class="text-sm text-slate-600" data-role="status"></span>
		</div>
	</div>

		<div class="mt-6 max-h-96 overflow-auto rounded-sm border border-slate-200 bg-white p-3" data-role="file-list">
			{{ template "_file_uploader_list" $model }}
		</div>
	</div>
</file-uploader>

<script>
(() => {
	if (window.FileUploaderDefined) {
		return;
	}
	window.FileUploaderDefined = true;

	class FileUploader extends HTMLElement {
		connectedCallback() {
			this.uploadUrl = this.dataset.uploadUrl || "";
			this.listUrl = this.dataset.listUrl || "";
			this.deleteUrl = this.dataset.deleteUrl || "";
			this.csrf = this.dataset.csrf || "";
			this.form = this.querySelector("[data-role='upload-form']");
			this.collapseToggle = this.querySelector("[data-role='collapse-toggle']");
			this.collapsePanel = this.querySelector("[data-role='collapse-panel']");
			this.collapseIcon = this.querySelector("[data-role='collapse-icon']");
			this.toggleButton = this.querySelector("[data-role='toggle-upload']");
			this.fileInput = this.querySelector("[data-role='file-input']");
			this.dropzone = this.querySelector("[data-role='dropzone']");
			this.dropzoneText = this.querySelector("[data-role='dropzone-text']");
			this.chooseButton = this.querySelector("[data-role='choose-button']");
			this.titleInput = this.querySelector("[data-role='title-input']");
			this.descriptionInput = this.querySelector("[data-role='description-input']");
			this.list = this.querySelector("[data-role='file-list']");
			this.status = this.querySelector("[data-role='status']");
			this.uploadButton = this.querySelector("[data-role='upload-button']");

			if (this.uploadButton) {
				this.uploadButton.addEventListener("click", (event) => this.handleUpload(event));
			}
			if (this.collapseToggle) {
				this.collapseToggle.addEventListener("click", () => this.togglePanel());
			}
			if (this.toggleButton && this.form) {
				this.toggleButton.addEventListener("click", () => this.toggleForm());
			}
			if (this.chooseButton && this.fileInput) {
				this.chooseButton.addEventListener("click", () => this.fileInput.click());
			}
			if (this.fileInput) {
				this.fileInput.addEventListener("change", () => this.updateDropzone());
			}
			if (this.dropzone) {
				this.dropzone.addEventListener("dragover", (event) => this.onDragOver(event));
				this.dropzone.addEventListener("dragleave", (event) => this.onDragLeave(event));
				this.dropzone.addEventListener("drop", (event) => this.onDrop(event));
			}
			this.addEventListener("click", (event) => this.handleClick(event));
			this.addEventListener("submit", (event) => {
				event.preventDefault();
				event.stopPropagation();
				event.stopImmediatePropagation();
			}, true);
			this.hydrateMeta();
			this.initSort();
			this.applyDefaultSort();
			this.normalizeUrls();
		}

		setStatus(message, isError) {
			if (!this.status) return;
			this.status.textContent = message || "";
			this.status.classList.remove("text-red-600", "text-green-600");
			if (isError) {
				this.status.classList.add("text-red-600");
			} else if (message) {
				this.status.classList.add("text-green-600");
			}
		}

		async handleUpload(event) {
			event.preventDefault();
			event.stopPropagation();
			event.stopImmediatePropagation();
			if (!this.uploadUrl || !this.form) return;
			this.setStatus("Upload läuft…");
			if (this.uploadButton) this.uploadButton.disabled = true;
			if (!this.fileInput || !this.fileInput.files || this.fileInput.files.length === 0) {
				this.setStatus("Bitte eine Datei auswählen.", true);
				if (this.uploadButton) this.uploadButton.disabled = false;
				return;
			}
			const payload = new FormData();
			payload.append("file", this.fileInput.files[0]);
			if (this.titleInput && this.titleInput.value) {
				payload.append("title", this.titleInput.value);
			}
			if (this.descriptionInput && this.descriptionInput.value) {
				payload.append("description", this.descriptionInput.value);
			}
			payload.set("csrf_token", this.csrf);

			const response = await fetch(this.uploadUrl, {
				method: "POST",
				body: payload,
				credentials: "same-origin",
			});

			if (!response.ok) {
				const message = await this.extractError(response);
				this.setStatus(message || "Upload fehlgeschlagen.", true);
				if (this.uploadButton) this.uploadButton.disabled = false;
				return;
			}

			const json = await this.safeJson(response);
			if (json && json.error) {
				this.setStatus(json.error, true);
				if (this.uploadButton) this.uploadButton.disabled = false;
				return;
			}
			if (this.fileInput) this.fileInput.value = "";
			this.updateDropzone();
			if (this.titleInput) this.titleInput.value = "";
			if (this.descriptionInput) this.descriptionInput.value = "";
			this.setStatus((json && json.message) || "Datei hochgeladen.");
			this.lastUploadedId = json && json.id ? json.id : "";
			await this.refreshList();
			if (this.form) this.form.classList.add("hidden");
			if (this.uploadButton) this.uploadButton.disabled = false;
		}

		async handleClick(event) {
			const target = event.target.closest("[data-action]");
			if (!target) return;
			const action = target.getAttribute("data-action");
			if (action === "copy") {
				const url = target.getAttribute("data-url");
				if (!url) return;
				try {
					await navigator.clipboard.writeText(url);
					this.setStatus("Link kopiert.");
				} catch {
					this.setStatus("Link kopieren fehlgeschlagen.", true);
				}
			}
			if (action === "delete") {
				const id = target.getAttribute("data-id");
				if (!id || !this.deleteUrl) return;
				if (!confirm("Datei wirklich löschen?")) return;
				const payload = new FormData();
				payload.set("csrf_token", this.csrf);
				const response = await fetch(`${this.deleteUrl}${id}`, {
					method: "POST",
					body: payload,
					credentials: "same-origin",
				});
				if (!response.ok) {
					const message = await this.extractError(response);
					this.setStatus(message || "Löschen fehlgeschlagen.", true);
					return;
				}
				const json = await this.safeJson(response);
				if (json && json.error) {
					this.setStatus(json.error, true);
					return;
				}
				this.setStatus((json && json.message) || "Datei gelöscht.");
				await this.refreshList();
			}
		}

		async refreshList() {
			if (!this.listUrl || !this.list) return;
			if (window.htmx && typeof window.htmx.ajax === "function") {
				window.htmx.ajax("GET", this.listUrl, {
					target: this.list,
					swap: "innerHTML",
				}).then(() => {
					this.hydrateMeta();
					this.initSort();
					this.applyDefaultSort();
					this.normalizeUrls();
					this.highlightNew();
				});
				return;
			}
			const response = await fetch(this.listUrl, { credentials: "same-origin" });
			if (!response.ok) {
				this.setStatus("Aktualisieren fehlgeschlagen.", true);
				return;
			}
			const html = await response.text();
			this.list.innerHTML = html;
			this.hydrateMeta();
			this.initSort();
			this.applyDefaultSort();
			this.normalizeUrls();
			this.highlightNew();
		}

		hydrateMeta() {
			if (!this.list) return;
			const items = Array.from(this.list.querySelectorAll("[data-role='file-meta']"));
			if (items.length === 0) return;
			items.forEach((item) => this.loadMeta(item));
		}

		normalizeUrls() {
			if (!this.list) return;
			const origin = window.location.origin;
			const withOrigin = (url) => {
				if (!url) return url;
				if (url.startsWith("http://") || url.startsWith("https://")) return url;
				try {
					return new URL(url, origin).toString();
				} catch {
					return url;
				}
			};

			const urlNodes = Array.from(this.list.querySelectorAll("[data-url]"));
			urlNodes.forEach((node) => {
				const raw = node.getAttribute("data-url");
				const abs = withOrigin(raw);
				node.setAttribute("data-url", abs);
				if (node.tagName === "A") {
					node.setAttribute("href", abs);
				}
			});
		}

		initSort() {
			if (!this.list) return;
			const buttons = Array.from(this.list.querySelectorAll("[data-role='file-sort']"));
			if (buttons.length === 0) return;
			buttons.forEach((button) => {
				button.addEventListener("click", () => this.sortBy(button));
			});
		}

		sortBy(button) {
			if (!this.list) return;
			const key = button.getAttribute("data-sort-key");
			const table = this.list.querySelector("table");
			const tbody = table ? table.querySelector("tbody") : null;
			if (!tbody || !key) return;

			const current = button.getAttribute("data-sort-dir") || "desc";
			const next = current === "asc" ? "desc" : "asc";
			button.setAttribute("data-sort-dir", next);

			const rows = Array.from(tbody.querySelectorAll("tr"));
			rows.sort((a, b) => {
				if (key === "created") {
					const av = parseInt(a.getAttribute("data-created") || "0", 10);
					const bv = parseInt(b.getAttribute("data-created") || "0", 10);
					return next === "asc" ? av - bv : bv - av;
				}
				const at = (a.getAttribute("data-title") || "").toLowerCase();
				const bt = (b.getAttribute("data-title") || "").toLowerCase();
				if (at === bt) return 0;
				const cmp = at < bt ? -1 : 1;
				return next === "asc" ? cmp : -cmp;
			});
			rows.forEach((row) => tbody.appendChild(row));
		}

		applyDefaultSort() {
			if (!this.list) return;
			const createdButton = this.list.querySelector("[data-role='file-sort'][data-sort-key='created']");
			if (!createdButton) return;
			createdButton.setAttribute("data-sort-dir", "asc");
			this.sortBy(createdButton);
		}

		highlightNew() {
			if (!this.list || !this.lastUploadedId) return;
			const row = this.list.querySelector(`tr[data-id="${this.lastUploadedId}"]`);
			if (!row) return;
			row.classList.add("bg-yellow-50");
			setTimeout(() => row.classList.remove("bg-yellow-50"), 2000);
			row.scrollIntoView({ block: "nearest" });
			this.lastUploadedId = "";
		}

		toggleForm() {
			if (!this.form) return;
			this.form.classList.toggle("hidden");
		}

		togglePanel() {
			if (!this.collapsePanel) return;
			const isHidden = this.collapsePanel.classList.contains("hidden");
			this.collapsePanel.classList.toggle("hidden");
			if (this.collapseIcon) {
				this.collapseIcon.classList.toggle("rotate-180", isHidden);
			}
		}

		updateDropzone() {
			if (!this.dropzoneText || !this.fileInput) return;
			const file = this.fileInput.files && this.fileInput.files[0];
			if (!file) {
				this.dropzoneText.textContent = "Datei hier ablegen oder auswählen";
				return;
			}
			this.dropzoneText.textContent = `${file.name} (${this.formatBytes(file.size) || "?"})`;
		}

		onDragOver(event) {
			event.preventDefault();
			if (this.dropzone) {
				this.dropzone.classList.add("border-slate-500", "bg-slate-50");
			}
		}

		onDragLeave(event) {
			event.preventDefault();
			if (this.dropzone) {
				this.dropzone.classList.remove("border-slate-500", "bg-slate-50");
			}
		}

		onDrop(event) {
			event.preventDefault();
			if (!this.fileInput) return;
			const files = event.dataTransfer?.files;
			if (!files || files.length === 0) return;
			this.fileInput.files = files;
			this.updateDropzone();
			this.onDragLeave(event);
		}

		async loadMeta(item) {
			const url = item.getAttribute("data-url");
			const filename = item.getAttribute("data-filename") || "";
			const value = item.querySelector("[data-role='file-meta-value']");
			if (!url || !value) return;
			try {
				const response = await fetch(url, { method: "HEAD", credentials: "same-origin" });
				const typeHeader = response.headers.get("content-type") || "";
				const lengthHeader = response.headers.get("content-length") || "";
				const typeLabel = this.formatType(typeHeader, filename);
				const sizeLabel = this.formatBytes(parseInt(lengthHeader || "0", 10));
				value.textContent = sizeLabel ? `${typeLabel} · ${sizeLabel}` : typeLabel;
			} catch {
				value.textContent = this.formatType("", filename);
			}
		}

		formatType(mime, filename) {
			if (mime) {
				if (mime.includes("pdf")) return "PDF";
				if (mime.startsWith("image/")) return "Bild";
				if (mime.startsWith("audio/")) return "Audio";
				if (mime.startsWith("video/")) return "Video";
				if (mime.includes("zip")) return "ZIP";
				if (mime.includes("msword") || mime.includes("officedocument.wordprocessingml")) return "DOC";
				if (mime.includes("spreadsheetml")) return "XLS";
				if (mime.includes("presentationml")) return "PPT";
				return mime.split(";")[0].toUpperCase();
			}
			const ext = filename.split(".").pop();
			if (!ext || ext === filename) return "Datei";
			return ext.toUpperCase();
		}

		formatBytes(bytes) {
			if (!bytes || Number.isNaN(bytes)) return "";
			const units = ["B", "KB", "MB", "GB", "TB"];
			let size = bytes;
			let unit = 0;
			while (size >= 1024 && unit < units.length - 1) {
				size /= 1024;
				unit += 1;
			}
			const precision = unit === 0 ? 0 : 1;
			return `${size.toFixed(precision)} ${units[unit]}`;
		}

		async safeJson(response) {
			const contentType = response.headers.get("content-type") || "";
			if (!contentType.includes("application/json")) {
				return null;
			}
			try {
				return await response.json();
			} catch {
				return null;
			}
		}

		async extractError(response) {
			const json = await this.safeJson(response);
			if (json) {
				if (json.error) {
					return this.localizeError(json.error);
				}
				if (json.message) {
					return this.localizeError(json.message);
				}
			}
			const text = await response.text().catch(() => "");
			return this.localizeError(text.trim());
		}

		localizeError(message) {
			if (!message) return message;
			const lower = message.toLowerCase();
			if (lower.includes("request entity too large") || lower.includes("entity too large")) {
				return "Datei ist zu groß. Maximale Größe: 100 MB.";
			}
			if (lower.includes("maximum allowed file size")) {
				return "Datei ist zu groß. Maximale Größe: 100 MB.";
			}
			if (lower.includes("mime type must be one of")) {
				const parts = message.split("mime type must be one of:");
				const list = parts.length > 1 ? parts[1].trim().replace(/\.+$/, "") : "";
				return list
					? `Dateityp nicht erlaubt. Erlaubte Typen: ${list}.`
					: "Dateityp nicht erlaubt.";
			}
			if (lower.includes("failed to upload")) {
				return "Datei-Upload fehlgeschlagen.";
			}
			return message;
		}
	}

	customElements.define("file-uploader", FileUploader);
})();
</script>