import React from 'react';
import { Switch } from 'react-native';
import { connect } from 'react-redux';
import { StackNavigationOptions } from '@react-navigation/stack';
import { Subscription } from 'rxjs';

import I18n from '../i18n';
import { withTheme } from '../theme';
import { SWITCH_TRACK_COLOR, themes } from '../constants/colors';
import StatusBar from '../containers/StatusBar';
import * as List from '../containers/List';
import database from '../lib/database';
import { changePasscode, checkHasPasscode, supportedBiometryLabel } from '../utils/localAuthentication';
import { DEFAULT_AUTO_LOCK } from '../constants/localAuthentication';
import SafeAreaView from '../containers/SafeAreaView';
import { events, logEvent } from '../utils/log';
import { TServerModel } from '../definitions/IServer';

const DEFAULT_BIOMETRY = false;

interface IItem {
	title: string;
	value: number;
	disabled?: boolean;
}

interface IScreenLockConfigViewProps {
	theme: string;
	server: string;
	Force_Screen_Lock: boolean;
	Force_Screen_Lock_After: number;
}

interface IScreenLockConfigViewState {
	autoLock: boolean;
	autoLockTime?: number | null;
	biometry?: boolean;
	biometryLabel: string | null;
}

class ScreenLockConfigView extends React.Component<IScreenLockConfigViewProps, IScreenLockConfigViewState> {
	private serverRecord?: TServerModel;

	private observable?: Subscription;

	static navigationOptions = (): StackNavigationOptions => ({
		title: I18n.t('Screen_lock')
	});

	constructor(props: IScreenLockConfigViewProps) {
		super(props);
		this.state = {
			autoLock: false,
			autoLockTime: null,
			biometry: DEFAULT_BIOMETRY,
			biometryLabel: null
		};
		this.init();
	}

	componentWillUnmount() {
		if (this.observable && this.observable.unsubscribe) {
			this.observable.unsubscribe();
		}
	}

	defaultAutoLockOptions = [
		{
			title: I18n.t('Local_authentication_auto_lock_60'),
			value: 60
		},
		{
			title: I18n.t('Local_authentication_auto_lock_300'),
			value: 300
		},
		{
			title: I18n.t('Local_authentication_auto_lock_900'),
			value: 900
		},
		{
			title: I18n.t('Local_authentication_auto_lock_1800'),
			value: 1800
		},
		{
			title: I18n.t('Local_authentication_auto_lock_3600'),
			value: 3600
		}
	];

	init = async () => {
		const { server } = this.props;
		const serversDB = database.servers;
		const serversCollection = serversDB.get('servers');
		try {
			this.serverRecord = await serversCollection.find(server);
			this.setState({
				autoLock: this.serverRecord?.autoLock,
				autoLockTime: this.serverRecord?.autoLockTime === null ? DEFAULT_AUTO_LOCK : this.serverRecord?.autoLockTime,
				biometry: this.serverRecord.biometry === null ? DEFAULT_BIOMETRY : this.serverRecord.biometry
			});
		} catch (error) {
			// Do nothing
		}

		const biometryLabel = await supportedBiometryLabel();
		this.setState({ biometryLabel });

		this.observe();
	};

	/*
	 * We should observe biometry value
	 * because it can be changed by PasscodeChange
	 * when the user set his first passcode
	 */
	observe = () => {
		this.observable = this.serverRecord?.observe()?.subscribe(({ biometry }) => {
			this.setState({ biometry: !!biometry });
		});
	};

	save = async () => {
		logEvent(events.SLC_SAVE_SCREEN_LOCK);
		const { autoLock, autoLockTime, biometry } = this.state;
		const serversDB = database.servers;
		await serversDB.write(async () => {
			await this.serverRecord?.update(record => {
				record.autoLock = autoLock;
				record.autoLockTime = autoLockTime === null ? DEFAULT_AUTO_LOCK : autoLockTime;
				record.biometry = biometry === null ? DEFAULT_BIOMETRY : biometry;
			});
		});
	};

	changePasscode = async ({ force }: { force: boolean }) => {
		logEvent(events.SLC_CHANGE_PASSCODE);
		await changePasscode({ force });
	};

	toggleAutoLock = () => {
		logEvent(events.SLC_TOGGLE_AUTOLOCK);
		this.setState(
			({ autoLock }) => ({ autoLock: !autoLock, autoLockTime: DEFAULT_AUTO_LOCK }),
			async () => {
				const { autoLock } = this.state;
				if (autoLock) {
					try {
						await checkHasPasscode({ force: false, serverRecord: this.serverRecord! });
					} catch {
						this.toggleAutoLock();
					}
				}
				this.save();
			}
		);
	};

	toggleBiometry = () => {
		logEvent(events.SLC_TOGGLE_BIOMETRY);
		this.setState(
			({ biometry }) => ({ biometry: !biometry }),
			() => this.save()
		);
	};

	isSelected = (value: number) => {
		const { autoLockTime } = this.state;
		return autoLockTime === value;
	};

	changeAutoLockTime = (autoLockTime: number) => {
		logEvent(events.SLC_CHANGE_AUTOLOCK_TIME);
		this.setState({ autoLockTime }, () => this.save());
	};

	renderIcon = () => {
		const { theme } = this.props;
		return <List.Icon name='check' color={themes[theme].tintColor} />;
	};

	renderItem = ({ item }: { item: IItem }) => {
		const { title, value, disabled } = item;
		return (
			<>
				<List.Item
					title={title}
					onPress={() => this.changeAutoLockTime(value)}
					right={() => (this.isSelected(value) ? this.renderIcon() : null)}
					disabled={disabled}
					translateTitle={false}
				/>
				<List.Separator />
			</>
		);
	};

	renderAutoLockSwitch = () => {
		const { autoLock } = this.state;
		const { Force_Screen_Lock } = this.props;
		return (
			<Switch value={autoLock} trackColor={SWITCH_TRACK_COLOR} onValueChange={this.toggleAutoLock} disabled={Force_Screen_Lock} />
		);
	};

	renderBiometrySwitch = () => {
		const { biometry } = this.state;
		return <Switch value={biometry} trackColor={SWITCH_TRACK_COLOR} onValueChange={this.toggleBiometry} />;
	};

	renderAutoLockItems = () => {
		const { autoLock, autoLockTime } = this.state;
		const { Force_Screen_Lock_After, Force_Screen_Lock } = this.props;
		if (!autoLock) {
			return null;
		}
		let items: IItem[] = this.defaultAutoLockOptions;
		if (Force_Screen_Lock && Force_Screen_Lock_After > 0) {
			items = [
				{
					title: I18n.t('After_seconds_set_by_admin', { seconds: Force_Screen_Lock_After }),
					value: Force_Screen_Lock_After,
					disabled: true
				}
			];
			// if Force_Screen_Lock is disabled and autoLockTime is a value that isn't on our defaultOptions we'll show it
		} else if (Force_Screen_Lock_After === autoLockTime && !items.find(item => item.value === autoLockTime)) {
			items.push({
				title: I18n.t('After_seconds_set_by_admin', { seconds: Force_Screen_Lock_After }),
				value: Force_Screen_Lock_After
			});
		}
		return (
			<List.Section>
				<List.Separator />
				{items.map(item => this.renderItem({ item }))}
			</List.Section>
		);
	};

	renderBiometry = () => {
		const { autoLock, biometryLabel } = this.state;
		if (!autoLock || !biometryLabel) {
			return null;
		}
		return (
			<List.Section>
				<List.Separator />
				<List.Item
					title={I18n.t('Local_authentication_unlock_with_label', { label: biometryLabel })}
					right={() => this.renderBiometrySwitch()}
					translateTitle={false}
				/>
				<List.Separator />
			</List.Section>
		);
	};

	render() {
		const { autoLock } = this.state;
		return (
			<SafeAreaView>
				<StatusBar />
				<List.Container>
					<List.Section>
						<List.Separator />
						<List.Item title='Local_authentication_unlock_option' right={() => this.renderAutoLockSwitch()} />
						{autoLock ? (
							<>
								<List.Separator />
								<List.Item title='Local_authentication_change_passcode' onPress={this.changePasscode} showActionIndicator />
							</>
						) : null}
						<List.Separator />
						<List.Info info='Local_authentication_info' />
					</List.Section>
					{this.renderBiometry()}
					{this.renderAutoLockItems()}
				</List.Container>
			</SafeAreaView>
		);
	}
}

const mapStateToProps = (state: any) => ({
	server: state.server.server,
	Force_Screen_Lock: state.settings.Force_Screen_Lock,
	Force_Screen_Lock_After: state.settings.Force_Screen_Lock_After
});

export default connect(mapStateToProps)(withTheme(ScreenLockConfigView));
