<script lang="ts">
	import { onMount } from 'svelte';

	let toggleButton: HTMLElement;

	onMount(() => {
		var themeToggleDarkIcon = document.getElementById('theme-toggle-dark-icon');
		var themeToggleLightIcon = document.getElementById('theme-toggle-light-icon');

		// Change the icons inside the button based on previous settings
		if (
			localStorage.getItem('color-theme') === 'dark' ||
			(!('color-theme' in localStorage) &&
				window.matchMedia('(prefers-color-scheme: dark)').matches)
		) {
			themeToggleLightIcon?.classList.remove('hidden');
		} else {
			themeToggleDarkIcon?.classList.remove('hidden');
		}
	});

	const toggleTheme = () => {
		var themeToggleDarkIcon = document.getElementById('theme-toggle-dark-icon');
		var themeToggleLightIcon = document.getElementById('theme-toggle-light-icon');
		// toggle icons inside button
		themeToggleDarkIcon?.classList.toggle('hidden');
		themeToggleLightIcon?.classList.toggle('hidden');

		// if set via local storage previously
		if (localStorage.getItem('color-theme')) {
			if (localStorage.getItem('color-theme') === 'light') {
				document.documentElement.classList.add('dark');
				localStorage.setItem('color-theme', 'dark');
			} else {
				document.documentElement.classList.remove('dark');
				localStorage.setItem('color-theme', 'light');
			}
		} else {
			if (document.documentElement.classList.contains('dark')) {
				document.documentElement.classList.remove('dark');
				localStorage.setItem('color-theme', 'light');
			} else {
				document.documentElement.classList.add('dark');
				localStorage.setItem('color-theme', 'dark');
			}
		}
	};
</script>

<button
	bind:this={toggleButton}
	on:click={toggleTheme}
	id="theme-toggle"
	type="button"
	class="text-gray-500 dark:text-immich-dark-primary hover:bg-gray-100 dark:hover:bg-gray-700 focus:outline-none  rounded-lg text-sm p-2.5"
>
	<svg
		id="theme-toggle-dark-icon"
		class="hidden w-6 h-6"
		fill="currentColor"
		viewBox="0 0 20 20"
		xmlns="http://www.w3.org/2000/svg"
		><path d="M17.293 13.293A8 8 0 016.707 2.707a8.001 8.001 0 1010.586 10.586z" /></svg
	>
	<svg
		id="theme-toggle-light-icon"
		class="hidden w-6 h-6"
		fill="currentColor"
		viewBox="0 0 20 20"
		xmlns="http://www.w3.org/2000/svg"
		><path
			d="M10 2a1 1 0 011 1v1a1 1 0 11-2 0V3a1 1 0 011-1zm4 8a4 4 0 11-8 0 4 4 0 018 0zm-.464 4.95l.707.707a1 1 0 001.414-1.414l-.707-.707a1 1 0 00-1.414 1.414zm2.12-10.607a1 1 0 010 1.414l-.706.707a1 1 0 11-1.414-1.414l.707-.707a1 1 0 011.414 0zM17 11a1 1 0 100-2h-1a1 1 0 100 2h1zm-7 4a1 1 0 011 1v1a1 1 0 11-2 0v-1a1 1 0 011-1zM5.05 6.464A1 1 0 106.465 5.05l-.708-.707a1 1 0 00-1.414 1.414l.707.707zm1.414 8.486l-.707.707a1 1 0 01-1.414-1.414l.707-.707a1 1 0 011.414 1.414zM4 11a1 1 0 100-2H3a1 1 0 000 2h1z"
			fill-rule="evenodd"
			clip-rule="evenodd"
		/></svg
	>
</button>
