import type { IRoom } from '@rocket.chat/core-typings';
import {
	Box,
	Modal,
	Button,
	Icon,
	Accordion,
	AccordionItem,
	ModalHeader,
	ModalTitle,
	ModalClose,
	ModalContent,
	ModalFooter,
	ModalFooterControllers,
} from '@rocket.chat/fuselage';
import { TextInput, Field, ToggleSwitch, FieldGroup, FieldLabel, FieldRow, FieldError, FieldHint } from '@rocket.chat/fuselage-forms';
import type { TranslationKey } from '@rocket.chat/ui-contexts';
import {
	useSetting,
	useTranslation,
	useEndpoint,
	useToastMessageDispatch,
	usePermissionWithScopedRoles,
	usePermission,
} from '@rocket.chat/ui-contexts';
import type { ComponentProps } from 'react';
import { useId, useEffect, useMemo } from 'react';
import { useForm, Controller } from 'react-hook-form';

import { useEncryptedRoomDescription } from './useEncryptedRoomDescription';
import UserAutoCompleteMultiple from '../../../components/UserAutoCompleteMultiple';
import { useCreateChannelTypePermission } from '../../../hooks/useCreateChannelTypePermission';
import { useHasLicenseModule } from '../../../hooks/useHasLicenseModule';
import { useIsFederationEnabled } from '../../../hooks/useIsFederationEnabled';
import { useGoToRoom } from '../../../views/room/hooks/useGoToRoom';

export type CreateChannelModalProps = {
	teamId?: string;
	mainRoom?: IRoom;
	onClose: () => void;
	reload?: () => void;
	onSuccess?: (rid: string) => void | Promise<void>;
};

type CreateChannelModalPayload = {
	name: string;
	isPrivate: boolean;
	topic?: string;
	members: string[];
	readOnly: boolean;
	encrypted: boolean;
	broadcast: boolean;
	federated: boolean;
};

const getFederationHintKey = (federationModule: boolean, featureToggle: boolean, federationAccessPermission: boolean): TranslationKey => {
	if (!federationModule) {
		return 'error-this-is-a-premium-feature';
	}

	if (!featureToggle) {
		return 'Federation_Matrix_Federated_Description_disabled';
	}

	if (!federationAccessPermission) {
		return 'error-not-authorized-federation';
	}

	return 'Federation_Matrix_Federated_Description';
};

const hasExternalMembers = (members: string[]): boolean => members.some((member) => member.startsWith('@'));

const CreateChannelModal = ({ teamId = '', mainRoom, onClose, reload, onSuccess }: CreateChannelModalProps) => {
	const t = useTranslation();
	const canSetReadOnly = usePermissionWithScopedRoles('set-readonly', ['owner']);
	const e2eEnabled = useSetting('E2E_Enable');
	const namesValidation = useSetting('UTF8_Channel_Names_Validation');
	const allowSpecialNames = useSetting('UI_Allow_room_names_with_special_chars');
	const e2eEnabledForPrivateByDefault = useSetting('E2E_Enabled_Default_PrivateRooms') && e2eEnabled;
	const e2eEnforcedForPrivate = Boolean(useSetting('E2E_Force_Encryption_For_Private_Rooms')) && Boolean(e2eEnabled);

	const getEncryptedHint = useEncryptedRoomDescription('channel');

	const channelNameRegex = useMemo(() => new RegExp(`^${namesValidation}$`), [namesValidation]);

	const federationEnabled = useIsFederationEnabled();
	const { data: federationModule = false } = useHasLicenseModule('federation');
	const federationAccessPermission = usePermission('access-federation');
	const canUseFederation = federationModule && federationEnabled && federationAccessPermission;
	const federationFieldHint = getFederationHintKey(federationModule, federationEnabled, federationAccessPermission);

	const channelNameExists = useEndpoint('GET', '/v1/rooms.nameExists');
	const createChannel = useEndpoint('POST', '/v1/channels.create');
	const createPrivateChannel = useEndpoint('POST', '/v1/groups.create');

	const dispatchToastMessage = useToastMessageDispatch();

	const canOnlyCreateOneType = useCreateChannelTypePermission(mainRoom?._id);

	const {
		formState: { errors },
		handleSubmit,
		control,
		setValue,
		watch,
	} = useForm({
		defaultValues: {
			members: [],
			name: '',
			topic: '',
			isPrivate: canOnlyCreateOneType ? canOnlyCreateOneType === 'p' : true,
			readOnly: false,
			encrypted: Boolean(e2eEnforcedForPrivate || e2eEnabledForPrivateByDefault),
			broadcast: false,
			federated: false,
		},
	});

	const { isPrivate, broadcast, readOnly, federated, encrypted } = watch();

	useEffect(() => {
		if (federated) {
			// if room is federated, it cannot be encrypted or broadcast or readOnly
			setValue('encrypted', false);
			setValue('broadcast', false);
			setValue('readOnly', false);
		}
	}, [federated, setValue]);

	useEffect(() => {
		if (!isPrivate) {
			setValue('encrypted', false);
		}
	}, [isPrivate, setValue]);

	useEffect(() => {
		if (isPrivate && e2eEnforcedForPrivate && !federated) {
			setValue('encrypted', true);
		}
	}, [isPrivate, e2eEnforcedForPrivate, federated, setValue]);

	useEffect(() => {
		setValue('readOnly', broadcast);
	}, [broadcast, setValue]);

	const validateChannelName = async (name: string): Promise<string | undefined> => {
		if (!name) {
			return;
		}

		if (!allowSpecialNames && !channelNameRegex.test(name)) {
			return t('Name_cannot_have_special_characters');
		}

		const { exists } = await channelNameExists({ roomName: name });
		if (exists) {
			return t('Channel_already_exist', { channelName: name });
		}
	};

	const goToRoom = useGoToRoom();

	const handleCreateChannel = async ({ name, members, readOnly, topic, broadcast, encrypted, federated }: CreateChannelModalPayload) => {
		let roomData;
		const params = {
			name,
			members,
			readOnly,
			extraData: {
				topic,
				broadcast,
				encrypted,
				...(federated && { federated }),
				...(teamId && { teamId }),
			},
		};

		let rid: string;
		try {
			if (isPrivate) {
				roomData = await createPrivateChannel(params);
				rid = roomData.group._id;
				if (!teamId) goToRoom(roomData.group._id);
			} else {
				roomData = await createChannel(params);
				rid = roomData.channel._id;
				if (!teamId) goToRoom(roomData.channel._id);
			}

			dispatchToastMessage({ type: 'success', message: t('Room_has_been_created') });
			void onSuccess?.(rid);
			reload?.();
			onClose();
		} catch (error) {
			dispatchToastMessage({ type: 'error', message: error });
		}
	};

	const e2eDisabled = useMemo<boolean>(
		() => !isPrivate || Boolean(!e2eEnabled) || federated || (e2eEnforcedForPrivate && isPrivate),
		[e2eEnabled, federated, isPrivate, e2eEnforcedForPrivate],
	);

	const createChannelFormId = useId();

	return (
		<Modal
			aria-labelledby={`${createChannelFormId}-title`}
			wrapperFunction={(props: ComponentProps<typeof Box>) => (
				<Box is='form' id={createChannelFormId} onSubmit={handleSubmit(handleCreateChannel)} {...props} />
			)}
		>
			<ModalHeader>
				<ModalTitle id={`${createChannelFormId}-title`}>{t('Create_channel')}</ModalTitle>
				<ModalClose tabIndex={-1} title={t('Close')} onClick={onClose} />
			</ModalHeader>
			<ModalContent marginBlockEnd={2}>
				<FieldGroup marginBlockEnd={24}>
					<Field>
						<FieldLabel required>{t('Name')}</FieldLabel>
						<FieldRow>
							<Controller
								control={control}
								name='name'
								rules={{
									required: t('Required_field', { field: t('Name') }),
									validate: (value) => validateChannelName(value),
								}}
								render={({ field }) => (
									<TextInput
										{...field}
										error={errors.name?.message}
										endAddon={<Icon name={isPrivate ? 'hashtag-lock' : 'hashtag'} size='x20' />}
										aria-required='true'
									/>
								)}
							/>
						</FieldRow>
						{errors.name && <FieldError>{errors.name.message}</FieldError>}
						{!allowSpecialNames && <FieldHint>{t('No_spaces_or_special_characters')}</FieldHint>}
					</Field>
					<Field>
						<FieldLabel>{t('Topic')}</FieldLabel>
						<FieldRow>
							<Controller control={control} name='topic' render={({ field }) => <TextInput {...field} />} />
						</FieldRow>
						<FieldHint>{t('Displayed_next_to_name')}</FieldHint>
					</Field>
					<Field>
						<FieldLabel>{t('Members')}</FieldLabel>
						<Controller
							control={control}
							name='members'
							rules={{
								validate: (members) =>
									!federated && hasExternalMembers(members) ? t('You_cannot_add_external_users_to_non_federated_room') : true,
							}}
							render={({ field }) => <UserAutoCompleteMultiple {...field} federated={federated} placeholder={t('Add_people')} />}
						/>
						{errors.members && <FieldError>{errors.members.message}</FieldError>}
					</Field>
					<Field>
						<FieldRow>
							<FieldLabel>{t('Private')}</FieldLabel>
							<Controller
								control={control}
								name='isPrivate'
								render={({ field: { value, ...field } }) => (
									<ToggleSwitch
										{...field}
										checked={canOnlyCreateOneType ? canOnlyCreateOneType === 'p' : value}
										disabled={!!canOnlyCreateOneType}
									/>
								)}
							/>
						</FieldRow>
						<FieldHint>{isPrivate ? t('People_can_only_join_by_being_invited') : t('Anyone_can_access')}</FieldHint>
					</Field>
				</FieldGroup>
				<Accordion>
					<AccordionItem title={t('Advanced_settings')}>
						<FieldGroup>
							<Box is='h5' fontScale='h5' color='titles-labels'>
								{t('Security_and_permissions')}
							</Box>
							<Field>
								<FieldRow>
									<FieldLabel>{t('Federation_Matrix_Federated')}</FieldLabel>
									<Controller
										control={control}
										name='federated'
										render={({ field: { value, ...field } }) => <ToggleSwitch {...field} checked={value} disabled={!canUseFederation} />}
									/>
								</FieldRow>
								<FieldHint>{t(federationFieldHint)}</FieldHint>
							</Field>
							<Field>
								<FieldRow>
									<FieldLabel>{t('Encrypted')}</FieldLabel>
									<Controller
										control={control}
										name='encrypted'
										render={({ field: { value, ...field } }) => <ToggleSwitch {...field} checked={value} disabled={e2eDisabled} />}
									/>
								</FieldRow>
								<FieldHint>{getEncryptedHint({ isPrivate, encrypted })}</FieldHint>
							</Field>
							<Field>
								<FieldRow>
									<FieldLabel>{t('Read_only')}</FieldLabel>
									<Controller
										control={control}
										name='readOnly'
										render={({ field: { value, ...field } }) => (
											<ToggleSwitch {...field} checked={value} disabled={!canSetReadOnly || broadcast || federated} />
										)}
									/>
								</FieldRow>
								<FieldHint>
									{readOnly ? t('Read_only_field_hint_enabled', { roomType: 'channel' }) : t('Anyone_can_send_new_messages')}
								</FieldHint>
							</Field>
							<Field>
								<FieldRow>
									<FieldLabel>{t('Broadcast')}</FieldLabel>
									<Controller
										control={control}
										name='broadcast'
										render={({ field: { value, ...field } }) => <ToggleSwitch {...field} checked={value} disabled={!!federated} />}
									/>
								</FieldRow>
								{broadcast && <FieldHint>{t('Broadcast_hint_enabled', { roomType: 'channel' })}</FieldHint>}
							</Field>
						</FieldGroup>
					</AccordionItem>
				</Accordion>
			</ModalContent>
			<ModalFooter>
				<ModalFooterControllers>
					<Button onClick={onClose}>{t('Cancel')}</Button>
					<Button type='submit' primary>
						{t('Create')}
					</Button>
				</ModalFooterControllers>
			</ModalFooter>
		</Modal>
	);
};

export default CreateChannelModal;