---
/*!
 * This file is part of Share₂Fedi
 * https://github.com/kytta/share2fedi
 *
 * SPDX-FileCopyrightText: © 2023 Nikita Karamov <me@kytta.dev>
 * SPDX-License-Identifier: AGPL-3.0-only
 */
const { instance, errors } = Astro.props;
---

<datalist id="popular-instances"></datalist>
<label class="mt1r">
	<span data-translate="instance">Fediverse instance</span>
	<div
		class="instance-input"
		dir="ltr"
	>
		<span id="https-label">https://</span>
		<input
			type="text"
			name="instance"
			id="instance"
			list="popular-instances"
			required
			aria-invalid={Boolean(errors)}
			aria-errormessage={errors ? "instance-error" : undefined}
			aria-describedby="https-label"
			value={instance}
		/>
	</div>
	{
		errors && (
			<p
				class="error"
				id="instance-error"
				aria-live="assertive"
			>
				{errors}
			</p>
		)
	}
</label>

<div
	id="saved-instances"
	class="mt1r"
>
	<span data-translate="previouslyUsed">Previously used:</span>&#x0020;
	<span class="list"></span>
</div>

<label
	class="mt1r"
	for="remember"
>
	<input
		type="checkbox"
		id="remember"
		name="remember"
	/>&#x0020;
	<span data-translate="rememberInstance">Remember instance on this device</span
	><noscript>.</noscript>
	<noscript style="color:darkred;font-size:smaller">
		This will not work when JavaScript is disabled.</noscript
	>
</label>

<style lang="scss">
	.instance-input {
		position: relative;
		display: flex;
		flex-wrap: wrap;
		align-items: stretch;
		width: 100%;

		span {
			display: flex;
			align-items: center;
			padding: 0.5rem;
			font-size: 1rem;
		}

		input[type="text"] {
			position: relative;
			flex: 1 1 auto;
			width: 1%;
		}
	}

	#saved-instances {
		margin-block-end: 1rem;

		> div {
			display: inline-block;
		}

		:global(span.link) {
			color: var(--s2f-accent-color-contrast);
			cursor: pointer;
			text-decoration: 1px solid underline currentColor;
		}
	}
</style>

<script>
	import { getUrlDomain, normalizeURL } from "@lib/url";
	import { $popularInstances } from "@stores/popular-instances";
	import { $savedInstances, save } from "@stores/saved-instances";

	const instanceElement = document.querySelector(
		"#instance",
	) as HTMLInputElement;
	const savedInstancesElement = document.querySelector(
		"#saved-instances",
	) as HTMLDivElement;
	$savedInstances.subscribe((instances) => {
		if (instances.size === 0) {
			savedInstancesElement.style.display = "none";
			return;
		}

		const savedInstances = [...instances];
		if (!instanceElement.value) {
			instanceElement.value = getUrlDomain(savedInstances[0] as string);
		}

		savedInstancesElement.style.display = "block";
		document.querySelector("#saved-instances>.list")!.replaceChildren(
			...savedInstances
				.flatMap((instance: string) => {
					if (!instance) {
						return [];
					}

					const host = getUrlDomain(instance);
					const element = document.createElement("span");
					element.classList.add("link");
					element.textContent = host;
					element.addEventListener("click", () => {
						instanceElement.value = host;
					});
					return [element, ", "];
				})
				.slice(0, -1),
		);
	});

	document.querySelector("#form")!.addEventListener("submit", (event) => {
		const formData = new FormData(event.target as HTMLFormElement);

		if (formData.get("remember")) {
			save(normalizeURL(formData.get("instance") as string));
		}

		return true;
	});

	$popularInstances.subscribe((instances) => {
		document.querySelector("#popular-instances")!.replaceChildren(
			...instances.map((domain) => {
				const option = document.createElement("option");
				option.value = domain;
				return option;
			}),
		);
	});
</script>