<script lang="ts">
	import { toast } from 'svelte-sonner';
	import { createEventDispatcher, onMount, getContext } from 'svelte';
	import { getLanguages } from '$lib/i18n';
	const dispatch = createEventDispatcher();

	import { models, user } from '$lib/stores';
	import { theme, setTheme } from '../../../stores/index';

	const i18n = getContext('i18n');

	import AdvancedParams from './Advanced/AdvancedParams.svelte';

	export let saveSettings: Function;
	export let getModels: Function;

	// General
	let themes = ['dark', 'light', 'rose-pine dark', 'rose-pine-dawn light'];
	let selectedTheme = 'system';
	let actualTheme: string;
	$: actualTheme = $theme;

	let languages = [];
	let lang = $i18n.language;
	let notificationEnabled = false;
	let system = '';

	let showAdvanced = false;

	function applyTheme(theme: string) {
		let themeToApply = theme;
		if (theme === 'system') {
			themeToApply = window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light';
		}

		themes
			.filter((e) => e !== themeToApply)
			.forEach((e) => {
				e.split(' ').forEach((e) => {
					document.documentElement.classList.remove(e);
				});
			});

		themeToApply.split(' ').forEach((e) => {
			document.documentElement.classList.add(e);
		});

		console.log(theme);
	}

	const toggleNotification = async () => {
		const permission = await Notification.requestPermission();

		if (permission === 'granted') {
			notificationEnabled = !notificationEnabled;
			saveSettings({ notificationEnabled: notificationEnabled });
		} else {
			toast.error(
				'Response notifications cannot be activated as the website permissions have been denied. Please visit your browser settings to grant the necessary access.'
			);
		}
	};

	// Advanced
	let requestFormat = '';
	let keepAlive = null;

	let options = {
		// Advanced
		seed: 0,
		temperature: '',
		repeat_penalty: '',
		repeat_last_n: '',
		mirostat: '',
		mirostat_eta: '',
		mirostat_tau: '',
		top_k: '',
		top_p: '',
		stop: '',
		tfs_z: '',
		num_ctx: '',
		num_predict: ''
	};

	const toggleRequestFormat = async () => {
		if (requestFormat === '') {
			requestFormat = 'json';
		} else {
			requestFormat = '';
		}

		saveSettings({ requestFormat: requestFormat !== '' ? requestFormat : undefined });
	};

	onMount(async () => {
		selectedTheme = localStorage.getItem('theme') ?? 'system';
		applyTheme(selectedTheme);

		let settings = JSON.parse(localStorage.getItem('settings') ?? '{}');
		languages = await getLanguages();

		notificationEnabled = settings.notificationEnabled ?? false;
		system = settings.system ?? '';

		requestFormat = settings.requestFormat ?? '';
		keepAlive = settings.keepAlive ?? null;

		options.seed = settings.seed ?? 0;
		options.temperature = settings.temperature ?? '';
		options.repeat_penalty = settings.repeat_penalty ?? '';
		options.top_k = settings.top_k ?? '';
		options.top_p = settings.top_p ?? '';
		options.num_ctx = settings.num_ctx ?? '';
		options = { ...options, ...settings.options };
		options.stop = (settings?.options?.stop ?? []).join(',');
	});

	function handleThemeChange(newTheme: string) {
		selectedTheme = newTheme;
		setTheme(newTheme);
		localStorage.setItem('theme', newTheme);
		applyTheme(newTheme);
	}
</script>

<div class="flex flex-col h-full justify-between text-sm">
	<div class="  pr-1.5 overflow-y-scroll max-h-[22rem]">
		<div class="">
			<div class=" mb-1 text-sm font-medium">{$i18n.t('WebUI Settings')}</div>

			<div class="flex w-full justify-between">
				<div class=" self-center text-xs font-medium">{$i18n.t('Theme')}</div>
				<div class="flex items-center relative">
					<select
						class=" dark:bg-gray-900 w-fit pr-8 rounded py-2 px-2 text-xs bg-transparent outline-none text-right"
						bind:value={selectedTheme}
						placeholder="Select a theme"
						on:change={() => handleThemeChange(selectedTheme)}
					>
						<option value="system">⚙️ {$i18n.t('System')}</option>
						<option value="dark">🌑 {$i18n.t('Dark')}</option>
						<option value="light">☀️ {$i18n.t('Light')}</option>
						<option value="rose-pine dark">🪻 {$i18n.t('Rosé Pine')}</option>
						<option value="rose-pine-dawn light">🌷 {$i18n.t('Rosé Pine Dawn')}</option>
					</select>
				</div>
			</div>

			<div class=" flex w-full justify-between">
				<div class=" self-center text-xs font-medium">{$i18n.t('Language')}</div>
				<div class="flex items-center relative">
					<select
						class=" dark:bg-gray-900 w-fit pr-8 rounded py-2 px-2 text-xs bg-transparent outline-none text-right"
						bind:value={lang}
						placeholder="Select a language"
						on:change={(e) => {
							$i18n.changeLanguage(lang);
						}}
					>
						{#each languages as language}
							<option value={language['code']}>{language['title']}</option>
						{/each}
					</select>
				</div>
			</div>
			{#if $i18n.language === 'en-US'}
				<div class="mb-2 text-xs text-gray-400 dark:text-gray-500">
					Couldn't find your language?
					<a
						class=" text-gray-300 font-medium underline"
						href="https://github.com/open-webui/open-webui/blob/main/docs/CONTRIBUTING.md#-translations-and-internationalization"
						target="_blank"
					>
						Help us translate Open WebUI!
					</a>
				</div>
			{/if}

			<div>
				<div class=" py-0.5 flex w-full justify-between">
					<div class=" self-center text-xs font-medium">{$i18n.t('Desktop Notifications')}</div>

					<button
						class="p-1 px-3 text-xs flex rounded transition"
						on:click={() => {
							toggleNotification();
						}}
						type="button"
					>
						{#if notificationEnabled === true}
							<span class="ml-2 self-center">{$i18n.t('On')}</span>
						{:else}
							<span class="ml-2 self-center">{$i18n.t('Off')}</span>
						{/if}
					</button>
				</div>
			</div>
		</div>

		<hr class=" dark:border-gray-700 my-3" />

		<div>
			<div class=" my-2.5 text-sm font-medium">{$i18n.t('System Prompt')}</div>
			<textarea
				bind:value={system}
				class="w-full rounded-lg p-4 text-sm dark:text-gray-300 dark:bg-gray-850 outline-none resize-none"
				rows="4"
			/>
		</div>

		<div class="mt-2 space-y-3 pr-1.5">
			<div class="flex justify-between items-center text-sm">
				<div class="  font-medium">{$i18n.t('Advanced Parameters')}</div>
				<button
					class=" text-xs font-medium text-gray-500"
					type="button"
					on:click={() => {
						showAdvanced = !showAdvanced;
					}}>{showAdvanced ? $i18n.t('Hide') : $i18n.t('Show')}</button
				>
			</div>

			{#if showAdvanced}
				<AdvancedParams bind:options />
				<hr class=" dark:border-gray-700" />

				<div class=" py-1 w-full justify-between">
					<div class="flex w-full justify-between">
						<div class=" self-center text-xs font-medium">{$i18n.t('Keep Alive')}</div>

						<button
							class="p-1 px-3 text-xs flex rounded transition"
							type="button"
							on:click={() => {
								keepAlive = keepAlive === null ? '5m' : null;
							}}
						>
							{#if keepAlive === null}
								<span class="ml-2 self-center"> {$i18n.t('Default')} </span>
							{:else}
								<span class="ml-2 self-center"> {$i18n.t('Custom')} </span>
							{/if}
						</button>
					</div>

					{#if keepAlive !== null}
						<div class="flex mt-1 space-x-2">
							<input
								class="w-full rounded py-1.5 px-4 text-sm dark:text-gray-300 dark:bg-gray-800 outline-none border border-gray-100 dark:border-gray-600"
								type="text"
								placeholder={$i18n.t("e.g. '30s','10m'. Valid time units are 's', 'm', 'h'.")}
								bind:value={keepAlive}
							/>
						</div>
					{/if}
				</div>

				<div>
					<div class=" py-1 flex w-full justify-between">
						<div class=" self-center text-sm font-medium">{$i18n.t('Request Mode')}</div>

						<button
							class="p-1 px-3 text-xs flex rounded transition"
							on:click={() => {
								toggleRequestFormat();
							}}
						>
							{#if requestFormat === ''}
								<span class="ml-2 self-center"> {$i18n.t('Default')} </span>
							{:else if requestFormat === 'json'}
								<!-- <svg
                            xmlns="http://www.w3.org/2000/svg"
                            viewBox="0 0 20 20"
                            fill="currentColor"
                            class="w-4 h-4 self-center"
                        >
                            <path
                                d="M10 2a.75.75 0 01.75.75v1.5a.75.75 0 01-1.5 0v-1.5A.75.75 0 0110 2zM10 15a.75.75 0 01.75.75v1.5a.75.75 0 01-1.5 0v-1.5A.75.75 0 0110 15zM10 7a3 3 0 100 6 3 3 0 000-6zM15.657 5.404a.75.75 0 10-1.06-1.06l-1.061 1.06a.75.75 0 001.06 1.06l1.06-1.06zM6.464 14.596a.75.75 0 10-1.06-1.06l-1.06 1.06a.75.75 0 001.06 1.06l1.06-1.06zM18 10a.75.75 0 01-.75.75h-1.5a.75.75 0 010-1.5h1.5A.75.75 0 0118 10zM5 10a.75.75 0 01-.75.75h-1.5a.75.75 0 010-1.5h1.5A.75.75 0 015 10zM14.596 15.657a.75.75 0 001.06-1.06l-1.06-1.061a.75.75 0 10-1.06 1.06l1.06 1.06zM5.404 6.464a.75.75 0 001.06-1.06l-1.06-1.06a.75.75 0 10-1.061 1.06l1.06 1.06z"
                            />
                        </svg> -->
								<span class="ml-2 self-center"> {$i18n.t('JSON')} </span>
							{/if}
						</button>
					</div>
				</div>
			{/if}
		</div>
	</div>

	<div class="flex justify-end pt-3 text-sm font-medium">
		<button
			class="  px-4 py-2 bg-emerald-700 hover:bg-emerald-800 text-gray-100 transition rounded-lg"
			on:click={() => {
				saveSettings({
					system: system !== '' ? system : undefined,
					options: {
						seed: (options.seed !== 0 ? options.seed : undefined) ?? undefined,
						stop: options.stop !== '' ? options.stop.split(',').filter((e) => e) : undefined,
						temperature: options.temperature !== '' ? options.temperature : undefined,
						repeat_penalty: options.repeat_penalty !== '' ? options.repeat_penalty : undefined,
						repeat_last_n: options.repeat_last_n !== '' ? options.repeat_last_n : undefined,
						mirostat: options.mirostat !== '' ? options.mirostat : undefined,
						mirostat_eta: options.mirostat_eta !== '' ? options.mirostat_eta : undefined,
						mirostat_tau: options.mirostat_tau !== '' ? options.mirostat_tau : undefined,
						top_k: options.top_k !== '' ? options.top_k : undefined,
						top_p: options.top_p !== '' ? options.top_p : undefined,
						tfs_z: options.tfs_z !== '' ? options.tfs_z : undefined,
						num_ctx: options.num_ctx !== '' ? options.num_ctx : undefined,
						num_predict: options.num_predict !== '' ? options.num_predict : undefined
					},
					keepAlive: keepAlive ? (isNaN(keepAlive) ? keepAlive : parseInt(keepAlive)) : undefined
				});
				dispatch('save');
			}}
		>
			{$i18n.t('Save')}
		</button>
	</div>
</div>
