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

	import { config, models, settings, theme, user } from '$lib/stores';

	const i18n = getContext('i18n');

	import AdvancedParams from './Advanced/AdvancedParams.svelte';
	import Textarea from '$lib/components/common/Textarea.svelte';
	import UserSettingField from './UserSettingField.svelte';
	import UserSettingRow from './UserSettingRow.svelte';
	import UserSettingSection from './UserSettingSection.svelte';
	import SettingsSelect from '$lib/components/common/SettingsSelect.svelte';
	export let saveSettings: Function;
	export let getModels: Function;

	// General
	let themes = ['dark', 'light', 'oled-dark'];
	let selectedTheme = 'system';

	let languages: Awaited<ReturnType<typeof getLanguages>> = [];
	let lang = $i18n.language;
	let system = '';

	let showAdvanced = false;

	const systemPromptTextareaClass =
		'w-full resize-y rounded-lg border border-gray-100/50 bg-gray-50/40 px-2 py-1.5 text-xs text-gray-700 outline-hidden transition-colors placeholder:text-gray-300 focus:border-blue-400 dark:border-white/[0.04] dark:bg-white/[0.03] dark:text-gray-300 dark:placeholder:text-gray-700 dark:focus:border-blue-500';
	const actionButtonClass =
		'text-xs text-gray-500 transition-colors hover:text-gray-900 dark:text-gray-500 dark:hover:text-white';

	let params = {
		// Advanced
		stream_response: null,
		stream_delta_chunk_size: null,
		function_calling: null,
		reasoning_tags: null,
		seed: null,
		temperature: null,
		reasoning_effort: null,
		logit_bias: null,
		frequency_penalty: null,
		presence_penalty: null,
		repeat_penalty: null,
		repeat_last_n: null,
		mirostat: null,
		mirostat_eta: null,
		mirostat_tau: null,
		top_k: null,
		top_p: null,
		min_p: null,
		stop: null,
		tfs_z: null,
		num_ctx: null,
		num_batch: null,
		num_keep: null,
		max_tokens: null,
		use_mmap: null,
		use_mlock: null,
		num_thread: null,
		num_gpu: null,
		think: null,
		format: null,
		keep_alive: null
	};

	const saveHandler = async () => {
		saveSettings({
			system: system !== '' ? system : undefined,
			params: {
				stream_response: params.stream_response !== null ? params.stream_response : undefined,
				stream_delta_chunk_size:
					params.stream_delta_chunk_size !== null ? params.stream_delta_chunk_size : undefined,
				function_calling: params.function_calling !== null ? params.function_calling : undefined,
				reasoning_tags: params.reasoning_tags !== null ? params.reasoning_tags : undefined,
				seed: (params.seed !== null ? params.seed : undefined) ?? undefined,
				stop: params.stop ? params.stop.split(',').filter((e) => e) : undefined,
				temperature: params.temperature !== null ? params.temperature : undefined,
				reasoning_effort: params.reasoning_effort !== null ? params.reasoning_effort : undefined,
				logit_bias: params.logit_bias !== null ? params.logit_bias : undefined,
				frequency_penalty: params.frequency_penalty !== null ? params.frequency_penalty : undefined,
				presence_penalty: params.presence_penalty !== null ? params.presence_penalty : undefined,
				repeat_penalty: params.repeat_penalty !== null ? params.repeat_penalty : undefined,
				repeat_last_n: params.repeat_last_n !== null ? params.repeat_last_n : undefined,
				mirostat: params.mirostat !== null ? params.mirostat : undefined,
				mirostat_eta: params.mirostat_eta !== null ? params.mirostat_eta : undefined,
				mirostat_tau: params.mirostat_tau !== null ? params.mirostat_tau : undefined,
				top_k: params.top_k !== null ? params.top_k : undefined,
				top_p: params.top_p !== null ? params.top_p : undefined,
				min_p: params.min_p !== null ? params.min_p : undefined,
				tfs_z: params.tfs_z !== null ? params.tfs_z : undefined,
				num_ctx: params.num_ctx !== null ? params.num_ctx : undefined,
				num_batch: params.num_batch !== null ? params.num_batch : undefined,
				num_keep: params.num_keep !== null ? params.num_keep : undefined,
				max_tokens: params.max_tokens !== null ? params.max_tokens : undefined,
				use_mmap: params.use_mmap !== null ? params.use_mmap : undefined,
				use_mlock: params.use_mlock !== null ? params.use_mlock : undefined,
				num_thread: params.num_thread !== null ? params.num_thread : undefined,
				num_gpu: params.num_gpu !== null ? params.num_gpu : undefined,
				think: params.think !== null ? params.think : undefined,
				keep_alive: params.keep_alive !== null ? params.keep_alive : undefined,
				format: params.format !== null ? params.format : undefined,
				...(params.custom_params && Object.keys(params.custom_params).length > 0
					? { custom_params: params.custom_params }
					: {})
			}
		});
		dispatch('save');
	};

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

		languages = await getLanguages();

		if (!$config?.features?.enable_easter_eggs) {
			languages = languages.filter((l) => l.code !== 'dg-DG');
		}

		system = $settings.system ?? '';

		params = { ...params, ...$settings.params };
		params.stop = $settings?.params?.stop ? ($settings?.params?.stop ?? []).join(',') : null;
	});

	const applyTheme = (_theme: string) => {
		let themeToApply = _theme === 'oled-dark' ? 'dark' : _theme === 'her' ? 'light' : _theme;

		if (_theme === 'system') {
			themeToApply = window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light';
		}

		if (themeToApply === 'dark' && !_theme.includes('oled')) {
			document.documentElement.style.setProperty('--color-gray-800', '#333');
			document.documentElement.style.setProperty('--color-gray-850', '#262626');
			document.documentElement.style.setProperty('--color-gray-900', '#171717');
			document.documentElement.style.setProperty('--color-gray-950', '#0d0d0d');
		}

		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);
		});

		const metaThemeColor = document.querySelector('meta[name="theme-color"]');
		if (metaThemeColor) {
			if (_theme.includes('system')) {
				const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches
					? 'dark'
					: 'light';
				console.log('Setting system meta theme color: ' + systemTheme);
				metaThemeColor.setAttribute('content', systemTheme === 'light' ? '#ffffff' : '#171717');
			} else {
				console.log('Setting meta theme color: ' + _theme);
				metaThemeColor.setAttribute(
					'content',
					_theme === 'dark'
						? '#171717'
						: _theme === 'oled-dark'
							? '#000000'
							: _theme === 'her'
								? '#983724'
								: '#ffffff'
				);
			}
		}

		if (typeof window !== 'undefined' && window.applyTheme) {
			window.applyTheme();
		}

		if (_theme.includes('oled')) {
			document.documentElement.style.setProperty('--color-gray-800', '#101010');
			document.documentElement.style.setProperty('--color-gray-850', '#050505');
			document.documentElement.style.setProperty('--color-gray-900', '#000000');
			document.documentElement.style.setProperty('--color-gray-950', '#000000');
			document.documentElement.classList.add('dark');
		}

		console.log(_theme);
	};

	const themeChangeHandler = (_theme: string) => {
		theme.set(_theme);
		localStorage.setItem('theme', _theme);
		applyTheme(_theme);
	};
</script>

<div class="flex flex-col h-full justify-between text-sm" id="tab-general">
	<h2 class="text-sm font-medium text-gray-900 dark:text-white mb-4">{$i18n.t('General')}</h2>

	<div class="flex-1 min-h-0 overflow-y-auto scrollbar-hover pr-1.5">
		<UserSettingSection title={$i18n.t('WebUI Settings')} first>
			<UserSettingRow
				label={$i18n.t('Theme')}
				description={$i18n.t('Choose the color theme used by the interface.')}
			>
				<SettingsSelect
					bind:value={selectedTheme}
					ariaLabel={$i18n.t('Theme')}
					placeholder={$i18n.t('Select a theme')}
					on:change={() => themeChangeHandler(selectedTheme)}
				>
					<option value="system">⚙️ {$i18n.t('System')}</option>
					<option value="dark">🌑 {$i18n.t('Dark')}</option>
					<option value="oled-dark">🌃 {$i18n.t('OLED Dark')}</option>
					<option value="light">☀️ {$i18n.t('Light')}</option>
					{#if $config?.features?.enable_easter_eggs}
						<option value="her">🌷 Her</option>
					{/if}
				</SettingsSelect>
			</UserSettingRow>

			<UserSettingRow
				label={$i18n.t('Language')}
				description={$i18n.t('Choose the language used for interface text.')}
			>
				<SettingsSelect
					bind:value={lang}
					ariaLabel={$i18n.t('Language')}
					placeholder={$i18n.t('Select a language')}
					on:change={(e) => {
						changeLanguage(lang);
					}}
				>
					{#each languages as language}
						<option value={language['code']}>{language['title']}</option>
					{/each}
				</SettingsSelect>
			</UserSettingRow>
			{#if $i18n.language === 'en-US' && !($config?.license_metadata ?? false)}
				<div class="-mt-1 text-[0.6875rem] text-gray-400 dark:text-gray-600">
					Couldn't find your language?
					<a
						class="font-normal underline text-gray-400 dark:text-gray-600"
						href="https://github.com/open-webui/open-webui/blob/main/docs/CONTRIBUTING.md#-translations-and-internationalization"
						target="_blank"
					>
						<!-- LICENSE covers this Open WebUI wordmark.
						Do not alter, remove, obscure, or replace it except as LICENSE permits:
						https://docs.openwebui.com/license. -->
						Help us translate Open WebUI!
					</a>
				</div>
			{/if}
		</UserSettingSection>

		{#if $user?.role === 'admin' || (($user?.permissions.chat?.controls ?? true) && ($user?.permissions.chat?.system_prompt ?? true))}
			<UserSettingSection title={$i18n.t('System Prompt')}>
				<UserSettingField description={$i18n.t('Set the default system prompt for new chats.')}>
					<Textarea
						bind:value={system}
						className={systemPromptTextareaClass}
						rows="4"
						placeholder={$i18n.t('Enter system prompt here')}
					/>
				</UserSettingField>
			</UserSettingSection>
		{/if}

		{#if $user?.role === 'admin' || (($user?.permissions.chat?.controls ?? true) && ($user?.permissions.chat?.params ?? true))}
			<UserSettingSection title={$i18n.t('Advanced Parameters')}>
				<UserSettingRow description={$i18n.t('Show or hide custom generation parameters.')}>
					<span slot="label">{$i18n.t('Model parameters')}</span>
					<button
						class={actionButtonClass}
						type="button"
						aria-expanded={showAdvanced}
						on:click={() => {
							showAdvanced = !showAdvanced;
						}}>{showAdvanced ? $i18n.t('Hide') : $i18n.t('Show')}</button
					>
				</UserSettingRow>

				{#if showAdvanced}
					<AdvancedParams admin={$user?.role === 'admin'} custom={true} bind:params />
				{/if}
			</UserSettingSection>
		{/if}
	</div>

	<div class="shrink-0 flex justify-end pt-3 text-sm font-normal">
		<button
			class="px-3.5 py-1.5 text-sm font-normal bg-black hover:bg-gray-900 text-white dark:bg-white dark:text-black dark:hover:bg-gray-100 transition rounded-full"
			on:click={() => {
				saveHandler();
			}}
		>
			{$i18n.t('Save')}
		</button>
	</div>
</div>
